openstack/charm-barbican-k8s
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Retire project post merge to sunbeam-charms

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Change-Id: Iff210bf4762cb8a7ae917bdbef6624f1bb550668
This commit is contained in:
James Page
2023-12-12 11:06:39 +00:00
parent 5717d5f418
commit 83e0d0845c
36 changed files with 13 additions and 4571 deletions
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.flake8
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[flake8]
max-line-length = 99
select: E,W,F,C,N
exclude:
venv
.git
build
dist
*.egg_info

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.jujuignore
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/venv
*.py[cod]
*.charm

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.stestr.conf
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[DEFAULT]
test_path=./tests/unit
top_dir=./tests

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.zuul.yaml
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- project:
templates:
- openstack-python3-charm-jobs
- openstack-cover-jobs
- microk8s-func-test
vars:
charm_build_name: barbican-k8s
juju_channel: 3.2/stable
juju_classic_mode: false
microk8s_channel: 1.28-strict/stable
microk8s_classic_mode: false
- noop-jobs

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CONTRIBUTING.md
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# Contributing
To make contributions to this charm, you'll need a working [development setup](https://juju.is/docs/sdk/dev-setup).
You can use the environments created by `tox` for development:
```shell
tox --notest -e unit
source .tox/unit/bin/activate
```
## Testing
This project uses `tox` for managing test environments. There are some pre-configured environments
that can be used for linting and formatting code when you're preparing contributions to the charm:
```shell
tox -e fmt # update your code according to linting rules
tox -e lint # code style
tox -e unit # unit tests
tox -e integration # integration tests
tox # runs 'lint' and 'unit' environments
```
## Build the charm
Build the charm in this git repository using:
```shell
charmcraft pack
```
<!-- You may want to include any contribution/style guidelines in this document>

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LICENSE
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README.md
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# barbican-k8s
## Description
barbican-k8s is an operator to manage the Barbican API and Worker
services on a Kubernetes based environment.
## Usage
### Deployment
barbican-k8s is deployed using below command:
juju deploy barbican-k8s barbican --trust
Now connect the barbican operator to existing database,
messaging and keystone identity operators:
juju relate mysql:database barbican:database
juju relate rabbitmq:amqp barbican:amqp
juju relate keystone:identity-service barbican:identity-service
juju relate vault:vault-kv barbican:vault-kv
### Configuration
This section covers common and/or important configuration options. See file
`config.yaml` for the full list of options, along with their descriptions and
default values. See the [Juju documentation][juju-docs-config-apps] for details
on configuring applications.
### Actions
This section covers Juju [actions][juju-docs-actions] supported by the charm.
Actions allow specific operations to be performed on a per-unit basis. To
display action descriptions run `juju actions barbican`. If the charm is not
deployed then see file `actions.yaml`.
## Relations
barbican-k8s requires the following relations:
`database`: To connect to MySQL
`amqp`: To connect to RabbitMQ
`identity-service`: To register endpoints in Keystone
`identity-ops`: To register roles in Keystone (optional)
`ingress-internal`: To expose service on underlying internal network
`ingress-public`: To expose service on public network
`vault-kv`: To store secrets in a Vault key-value store
## OCI Images
The charm by default uses following images:
`ghcr.io/canonical/barbican-consolidated:2023.2`
## Contributing
Please see the [Juju SDK docs](https://juju.is/docs/sdk) for guidelines
on enhancements to this charm following best practice guidelines, and
[CONTRIBUTING.md](contributors-guide) for developer guidance.
## Bugs
Please report bugs on [Launchpad][lp-bugs-charm-barbican-k8s].
<!-- LINKS -->
[contributors-guide]: https://opendev.org/openstack/charm-barbican-k8s/src/branch/main/CONTRIBUTING.md
[juju-docs-actions]: https://jaas.ai/docs/actions
[juju-docs-config-apps]: https://juju.is/docs/configuring-applications
[lp-bugs-charm-barbican-k8s]: https://bugs.launchpad.net/charm-barbican-k8s/+filebug

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README.rst Normal file
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This repository has been merged into the
`Sunbeam Charms <https://opendev.org/openstack/sunbeam-charms>`_
repository.
The contents of this repository are still available in the Git
source code management system. To see the contents of this
repository before it reached its end of life, please check out the
previous commit with "git checkout HEAD^1".
For any further questions, please email
openstack-discuss@lists.openstack.org or join #openstack-sunbeam on
OFTC.

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charmcraft.yaml
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# This file configures Charmcraft.
# See https://juju.is/docs/sdk/charmcraft-config for guidance.
type: charm
bases:
- build-on:
- name: ubuntu
channel: "22.04"
run-on:
- name: ubuntu
channel: "22.04"
parts:
charm:
build-packages:
- git
- libffi-dev
- libssl-dev
charm-binary-python-packages:
- cryptography
- jsonschema
- pydantic<2.0
- jinja2
- git+https://opendev.org/openstack/charm-ops-sunbeam#egg=ops_sunbeam

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config.yaml
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options:
debug:
default: False
description: Enable debug logging.
type: boolean
region:
default: RegionOne
description: Space delimited list of OpenStack regions
type: string

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fetch-libs.sh
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#!/bin/bash
echo "INFO: Fetching libs from charmhub."
charmcraft fetch-lib charms.data_platform_libs.v0.database_requires
charmcraft fetch-lib charms.keystone_k8s.v1.identity_service
charmcraft fetch-lib charms.keystone_k8s.v0.identity_resource
charmcraft fetch-lib charms.rabbitmq_k8s.v0.rabbitmq
charmcraft fetch-lib charms.traefik_k8s.v2.ingress

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lib/charms/data_platform_libs/v0/database_requires.py
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# Copyright 2023 Canonical Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
r"""[DEPRECATED] Relation 'requires' side abstraction for database relation.
This library is a uniform interface to a selection of common database
metadata, with added custom events that add convenience to database management,
and methods to consume the application related data.
Following an example of using the DatabaseCreatedEvent, in the context of the
application charm code:
```python
from charms.data_platform_libs.v0.database_requires import (
DatabaseCreatedEvent,
DatabaseRequires,
)
class ApplicationCharm(CharmBase):
# Application charm that connects to database charms.
def __init__(self, *args):
super().__init__(*args)
# Charm events defined in the database requires charm library.
self.database = DatabaseRequires(self, relation_name="database", database_name="database")
self.framework.observe(self.database.on.database_created, self._on_database_created)
def _on_database_created(self, event: DatabaseCreatedEvent) -> None:
# Handle the created database
# Create configuration file for app
config_file = self._render_app_config_file(
event.username,
event.password,
event.endpoints,
)
# Start application with rendered configuration
self._start_application(config_file)
# Set active status
self.unit.status = ActiveStatus("received database credentials")
```
As shown above, the library provides some custom events to handle specific situations,
which are listed below:
— database_created: event emitted when the requested database is created.
— endpoints_changed: event emitted when the read/write endpoints of the database have changed.
— read_only_endpoints_changed: event emitted when the read-only endpoints of the database
have changed. Event is not triggered if read/write endpoints changed too.
If it is needed to connect multiple database clusters to the same relation endpoint
the application charm can implement the same code as if it would connect to only
one database cluster (like the above code example).
To differentiate multiple clusters connected to the same relation endpoint
the application charm can use the name of the remote application:
```python
def _on_database_created(self, event: DatabaseCreatedEvent) -> None:
# Get the remote app name of the cluster that triggered this event
cluster = event.relation.app.name
```
It is also possible to provide an alias for each different database cluster/relation.
So, it is possible to differentiate the clusters in two ways.
The first is to use the remote application name, i.e., `event.relation.app.name`, as above.
The second way is to use different event handlers to handle each cluster events.
The implementation would be something like the following code:
```python
from charms.data_platform_libs.v0.database_requires import (
DatabaseCreatedEvent,
DatabaseRequires,
)
class ApplicationCharm(CharmBase):
# Application charm that connects to database charms.
def __init__(self, *args):
super().__init__(*args)
# Define the cluster aliases and one handler for each cluster database created event.
self.database = DatabaseRequires(
self,
relation_name="database",
database_name="database",
relations_aliases = ["cluster1", "cluster2"],
)
self.framework.observe(
self.database.on.cluster1_database_created, self._on_cluster1_database_created
)
self.framework.observe(
self.database.on.cluster2_database_created, self._on_cluster2_database_created
)
def _on_cluster1_database_created(self, event: DatabaseCreatedEvent) -> None:
# Handle the created database on the cluster named cluster1
# Create configuration file for app
config_file = self._render_app_config_file(
event.username,
event.password,
event.endpoints,
)
...
def _on_cluster2_database_created(self, event: DatabaseCreatedEvent) -> None:
# Handle the created database on the cluster named cluster2
# Create configuration file for app
config_file = self._render_app_config_file(
event.username,
event.password,
event.endpoints,
)
...
```
"""
import json
import logging
from collections import namedtuple
from datetime import datetime
from typing import List, Optional
from ops.charm import (
CharmEvents,
RelationChangedEvent,
RelationEvent,
RelationJoinedEvent,
)
from ops.framework import EventSource, Object
from ops.model import Relation
# The unique Charmhub library identifier, never change it
LIBID = "0241e088ffa9440fb4e3126349b2fb62"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version.
LIBPATCH = 6
logger = logging.getLogger(__name__)
class DatabaseEvent(RelationEvent):
"""Base class for database events."""
@property
def endpoints(self) -> Optional[str]:
"""Returns a comma separated list of read/write endpoints."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("endpoints")
@property
def password(self) -> Optional[str]:
"""Returns the password for the created user."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("password")
@property
def read_only_endpoints(self) -> Optional[str]:
"""Returns a comma separated list of read only endpoints."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("read-only-endpoints")
@property
def replset(self) -> Optional[str]:
"""Returns the replicaset name.
MongoDB only.
"""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("replset")
@property
def tls(self) -> Optional[str]:
"""Returns whether TLS is configured."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("tls")
@property
def tls_ca(self) -> Optional[str]:
"""Returns TLS CA."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("tls-ca")
@property
def uris(self) -> Optional[str]:
"""Returns the connection URIs.
MongoDB, Redis, OpenSearch and Kafka only.
"""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("uris")
@property
def username(self) -> Optional[str]:
"""Returns the created username."""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("username")
@property
def version(self) -> Optional[str]:
"""Returns the version of the database.
Version as informed by the database daemon.
"""
if not self.relation.app:
return None
return self.relation.data[self.relation.app].get("version")
class DatabaseCreatedEvent(DatabaseEvent):
"""Event emitted when a new database is created for use on this relation."""
class DatabaseEndpointsChangedEvent(DatabaseEvent):
"""Event emitted when the read/write endpoints are changed."""
class DatabaseReadOnlyEndpointsChangedEvent(DatabaseEvent):
"""Event emitted when the read only endpoints are changed."""
class DatabaseEvents(CharmEvents):
"""Database events.
This class defines the events that the database can emit.
"""
database_created = EventSource(DatabaseCreatedEvent)
endpoints_changed = EventSource(DatabaseEndpointsChangedEvent)
read_only_endpoints_changed = EventSource(DatabaseReadOnlyEndpointsChangedEvent)
Diff = namedtuple("Diff", "added changed deleted")
Diff.__doc__ = """
A tuple for storing the diff between two data mappings.
— added — keys that were added.
— changed — keys that still exist but have new values.
— deleted — keys that were deleted.
"""
class DatabaseRequires(Object):
"""Requires-side of the database relation."""
on = DatabaseEvents() # pyright: ignore [reportGeneralTypeIssues]
def __init__(
self,
charm,
relation_name: str,
database_name: str,
extra_user_roles: Optional[str] = None,
relations_aliases: Optional[List[str]] = None,
):
"""Manager of database client relations."""
super().__init__(charm, relation_name)
self.charm = charm
self.database = database_name
self.extra_user_roles = extra_user_roles
self.local_app = self.charm.model.app
self.local_unit = self.charm.unit
self.relation_name = relation_name
self.relations_aliases = relations_aliases
self.framework.observe(
self.charm.on[relation_name].relation_joined, self._on_relation_joined_event
)
self.framework.observe(
self.charm.on[relation_name].relation_changed, self._on_relation_changed_event
)
# Define custom event names for each alias.
if relations_aliases:
# Ensure the number of aliases does not exceed the maximum
# of connections allowed in the specific relation.
relation_connection_limit = self.charm.meta.requires[relation_name].limit
if len(relations_aliases) != relation_connection_limit:
raise ValueError(
f"The number of aliases must match the maximum number of connections allowed in the relation. "
f"Expected {relation_connection_limit}, got {len(relations_aliases)}"
)
for relation_alias in relations_aliases:
self.on.define_event(f"{relation_alias}_database_created", DatabaseCreatedEvent)
self.on.define_event(
f"{relation_alias}_endpoints_changed", DatabaseEndpointsChangedEvent
)
self.on.define_event(
f"{relation_alias}_read_only_endpoints_changed",
DatabaseReadOnlyEndpointsChangedEvent,
)
def _assign_relation_alias(self, relation_id: int) -> None:
"""Assigns an alias to a relation.
This function writes in the unit data bag.
Args:
relation_id: the identifier for a particular relation.
"""
# If no aliases were provided, return immediately.
if not self.relations_aliases:
return
# Return if an alias was already assigned to this relation
# (like when there are more than one unit joining the relation).
if (
self.charm.model.get_relation(self.relation_name, relation_id)
.data[self.local_unit]
.get("alias")
):
return
# Retrieve the available aliases (the ones that weren't assigned to any relation).
available_aliases = self.relations_aliases[:]
for relation in self.charm.model.relations[self.relation_name]:
alias = relation.data[self.local_unit].get("alias")
if alias:
logger.debug("Alias %s was already assigned to relation %d", alias, relation.id)
available_aliases.remove(alias)
# Set the alias in the unit relation databag of the specific relation.
relation = self.charm.model.get_relation(self.relation_name, relation_id)
relation.data[self.local_unit].update({"alias": available_aliases[0]})
def _diff(self, event: RelationChangedEvent) -> Diff:
"""Retrieves the diff of the data in the relation changed databag.
Args:
event: relation changed event.
Returns:
a Diff instance containing the added, deleted and changed
keys from the event relation databag.
"""
# Retrieve the old data from the data key in the local unit relation databag.
old_data = json.loads(event.relation.data[self.local_unit].get("data", "{}"))
# Retrieve the new data from the event relation databag.
new_data = (
{key: value for key, value in event.relation.data[event.app].items() if key != "data"}
if event.app
else {}
)
# These are the keys that were added to the databag and triggered this event.
added = new_data.keys() - old_data.keys()
# These are the keys that were removed from the databag and triggered this event.
deleted = old_data.keys() - new_data.keys()
# These are the keys that already existed in the databag,
# but had their values changed.
changed = {
key for key in old_data.keys() & new_data.keys() if old_data[key] != new_data[key]
}
# TODO: evaluate the possibility of losing the diff if some error
# happens in the charm before the diff is completely checked (DPE-412).
# Convert the new_data to a serializable format and save it for a next diff check.
event.relation.data[self.local_unit].update({"data": json.dumps(new_data)})
# Return the diff with all possible changes.
return Diff(added, changed, deleted)
def _emit_aliased_event(self, event: RelationChangedEvent, event_name: str) -> None:
"""Emit an aliased event to a particular relation if it has an alias.
Args:
event: the relation changed event that was received.
event_name: the name of the event to emit.
"""
alias = self._get_relation_alias(event.relation.id)
if alias:
getattr(self.on, f"{alias}_{event_name}").emit(
event.relation, app=event.app, unit=event.unit
)
def _get_relation_alias(self, relation_id: int) -> Optional[str]:
"""Returns the relation alias.
Args:
relation_id: the identifier for a particular relation.
Returns:
the relation alias or None if the relation was not found.
"""
for relation in self.charm.model.relations[self.relation_name]:
if relation.id == relation_id:
return relation.data[self.local_unit].get("alias")
return None
def fetch_relation_data(self) -> dict:
"""Retrieves data from relation.
This function can be used to retrieve data from a relation
in the charm code when outside an event callback.
Returns:
a dict of the values stored in the relation data bag
for all relation instances (indexed by the relation ID).
"""
data = {}
for relation in self.relations:
data[relation.id] = (
{key: value for key, value in relation.data[relation.app].items() if key != "data"}
if relation.app
else {}
)
return data
def _update_relation_data(self, relation_id: int, data: dict) -> None:
"""Updates a set of key-value pairs in the relation.
This function writes in the application data bag, therefore,
only the leader unit can call it.
Args:
relation_id: the identifier for a particular relation.
data: dict containing the key-value pairs
that should be updated in the relation.
"""
if self.local_unit.is_leader():
relation = self.charm.model.get_relation(self.relation_name, relation_id)
relation.data[self.local_app].update(data)
def _on_relation_joined_event(self, event: RelationJoinedEvent) -> None:
"""Event emitted when the application joins the database relation."""
# If relations aliases were provided, assign one to the relation.
self._assign_relation_alias(event.relation.id)
# Sets both database and extra user roles in the relation
# if the roles are provided. Otherwise, sets only the database.
if self.extra_user_roles:
self._update_relation_data(
event.relation.id,
{
"database": self.database,
"extra-user-roles": self.extra_user_roles,
},
)
else:
self._update_relation_data(event.relation.id, {"database": self.database})
def _on_relation_changed_event(self, event: RelationChangedEvent) -> None:
"""Event emitted when the database relation has changed."""
# Check which data has changed to emit customs events.
diff = self._diff(event)
# Check if the database is created
# (the database charm shared the credentials).
if "username" in diff.added and "password" in diff.added:
# Emit the default event (the one without an alias).
logger.info("database created at %s", datetime.now())
getattr(self.on, "database_created").emit(
event.relation, app=event.app, unit=event.unit
)
# Emit the aliased event (if any).
self._emit_aliased_event(event, "database_created")
# To avoid unnecessary application restarts do not trigger
# “endpoints_changed“ event if “database_created“ is triggered.
return
# Emit an endpoints changed event if the database
# added or changed this info in the relation databag.
if "endpoints" in diff.added or "endpoints" in diff.changed:
# Emit the default event (the one without an alias).
logger.info("endpoints changed on %s", datetime.now())
getattr(self.on, "endpoints_changed").emit(
event.relation, app=event.app, unit=event.unit
)
# Emit the aliased event (if any).
self._emit_aliased_event(event, "endpoints_changed")
# To avoid unnecessary application restarts do not trigger
# “read_only_endpoints_changed“ event if “endpoints_changed“ is triggered.
return
# Emit a read only endpoints changed event if the database
# added or changed this info in the relation databag.
if "read-only-endpoints" in diff.added or "read-only-endpoints" in diff.changed:
# Emit the default event (the one without an alias).
logger.info("read-only-endpoints changed on %s", datetime.now())
getattr(self.on, "read_only_endpoints_changed").emit(
event.relation, app=event.app, unit=event.unit
)
# Emit the aliased event (if any).
self._emit_aliased_event(event, "read_only_endpoints_changed")
@property
def relations(self) -> List[Relation]:
"""The list of Relation instances associated with this relation_name."""
return list(self.charm.model.relations[self.relation_name])

392
lib/charms/keystone_k8s/v0/identity_resource.py
View File

@@ -1,392 +0,0 @@
"""IdentityResourceProvides and Requires module.
This library contains the Requires and Provides classes for handling
the identity_ops interface.
Import `IdentityResourceRequires` in your charm, with the charm object and the
relation name:
- self
- "identity_ops"
Also provide additional parameters to the charm object:
- request
Three events are also available to respond to:
- provider_ready
- provider_goneaway
- response_avaialable
A basic example showing the usage of this relation follows:
```
from charms.keystone_k8s.v0.identity_resource import IdentityResourceRequires
class IdentityResourceClientCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
# IdentityResource Requires
self.identity_resource = IdentityResourceRequires(
self, "identity_ops",
)
self.framework.observe(
self.identity_resource.on.provider_ready, self._on_identity_resource_ready)
self.framework.observe(
self.identity_resource.on.provider_goneaway, self._on_identity_resource_goneaway)
self.framework.observe(
self.identity_resource.on.response_available, self._on_identity_resource_response)
def _on_identity_resource_ready(self, event):
'''React to the IdentityResource provider_ready event.
This event happens when n IdentityResource relation is added to the
model. Ready to send any ops to keystone.
'''
# Ready to send any ops.
pass
def _on_identity_resource_response(self, event):
'''React to the IdentityResource response_available event.
The IdentityResource interface will provide the response for the ops sent.
'''
# Read the response for the ops sent.
pass
def _on_identity_resource_goneaway(self, event):
'''React to the IdentityResource goneaway event.
This event happens when an IdentityResource relation is removed.
'''
# IdentityResource Relation has goneaway. No ops can be sent.
pass
```
A sample ops request can be of format
{
"id": <request id>
"tag": <string to identify request>
"ops": [
{
"name": <op name>,
"params": {
<param 1>: <value 1>,
<param 2>: <value 2>
}
}
]
}
For any sensitive data in the ops params, the charm can create secrets and pass
secret id instead of sensitive data as part of ops request. The charm should
ensure to grant secret access to provider charm i.e., keystone over relation.
The secret content should hold the sensitive data with same name as param name.
"""
import json
import logging
from typing import (
Optional,
)
from ops.charm import (
CharmBase,
RelationBrokenEvent,
RelationChangedEvent,
RelationEvent,
RelationJoinedEvent,
)
from ops.framework import (
EventBase,
EventSource,
Object,
ObjectEvents,
StoredState,
)
from ops.model import (
Relation,
)
logger = logging.getLogger(__name__)
# The unique Charmhub library identifier, never change it
LIBID = "b419d4d8249e423487daafc3665ed06f"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 3
REQUEST_NOT_SENT = 1
REQUEST_SENT = 2
REQUEST_PROCESSED = 3
class IdentityOpsProviderReadyEvent(RelationEvent):
"""Has IdentityOpsProviderReady Event."""
pass
class IdentityOpsResponseEvent(RelationEvent):
"""Has IdentityOpsResponse Event."""
pass
class IdentityOpsProviderGoneAwayEvent(RelationEvent):
"""Has IdentityOpsProviderGoneAway Event."""
pass
class IdentityResourceResponseEvents(ObjectEvents):
"""Events class for `on`."""
provider_ready = EventSource(IdentityOpsProviderReadyEvent)
response_available = EventSource(IdentityOpsResponseEvent)
provider_goneaway = EventSource(IdentityOpsProviderGoneAwayEvent)
class IdentityResourceRequires(Object):
"""IdentityResourceRequires class."""
on = IdentityResourceResponseEvents()
_stored = StoredState()
def __init__(self, charm: CharmBase, relation_name: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self._stored.set_default(provider_ready=False, requests=[])
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_identity_resource_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_resource_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_identity_resource_relation_broken,
)
def _on_identity_resource_relation_joined(
self, event: RelationJoinedEvent
):
"""Handle IdentityResource joined."""
self._stored.provider_ready = True
self.on.provider_ready.emit(event.relation)
def _on_identity_resource_relation_changed(
self, event: RelationChangedEvent
):
"""Handle IdentityResource changed."""
id_ = self.response.get("id")
self.save_request_in_store(id_, None, None, REQUEST_PROCESSED)
self.on.response_available.emit(event.relation)
def _on_identity_resource_relation_broken(
self, event: RelationBrokenEvent
):
"""Handle IdentityResource broken."""
self._stored.provider_ready = False
self.on.provider_goneaway.emit(event.relation)
@property
def _identity_resource_rel(self) -> Optional[Relation]:
"""The IdentityResource relation."""
return self.framework.model.get_relation(self.relation_name)
@property
def response(self) -> dict:
"""Response object from keystone."""
response = self.get_remote_app_data("response")
if not response:
return {}
try:
return json.loads(response)
except Exception as e:
logger.debug(str(e))
return {}
def save_request_in_store(
self, id: str, tag: str, ops: list, state: int
) -> None:
"""Save request in the store."""
if id is None:
return
for request in self._stored.requests:
if request.get("id") == id:
if tag:
request["tag"] = tag
if ops:
request["ops"] = ops
request["state"] = state
return
# New request
self._stored.requests.append(
{"id": id, "tag": tag, "ops": ops, "state": state}
)
def get_request_from_store(self, id: str) -> dict:
"""Get request from the stote."""
for request in self._stored.requests:
if request.get("id") == id:
return request
return {}
def is_request_processed(self, id: str) -> bool:
"""Check if request is processed."""
for request in self._stored.requests:
if (
request.get("id") == id
and request.get("state") == REQUEST_PROCESSED
):
return True
return False
def get_remote_app_data(self, key: str) -> Optional[str]:
"""Return the value for the given key from remote app data."""
if self._identity_resource_rel:
data = self._identity_resource_rel.data[
self._identity_resource_rel.app
]
return data.get(key)
return None
def ready(self) -> bool:
"""Interface is ready or not.
Interface is considered ready if the op request is processed
and response is sent. In case of non leader unit, just consider
the interface is ready.
"""
if not self.model.unit.is_leader():
logger.debug("Not a leader unit, set the interface to ready")
return True
try:
app_data = self._identity_resource_rel.data[self.charm.app]
if "request" not in app_data:
return False
request = json.loads(app_data["request"])
request_id = request.get("id")
response_id = self.response.get("id")
if request_id == response_id:
return True
except Exception as e:
logger.debug(str(e))
return False
def request_ops(self, request: dict) -> None:
"""Request keystone ops."""
if not self.model.unit.is_leader():
logger.debug("Not a leader unit, not sending request")
return
id_ = request.get("id")
tag = request.get("tag")
ops = request.get("ops")
req = self.get_request_from_store(id_)
if req and req.get("state") == REQUEST_PROCESSED:
logger.debug("Request {id_} already processed")
return
if not self._stored.provider_ready:
self.save_request_in_store(id_, tag, ops, REQUEST_NOT_SENT)
logger.debug("Keystone not yet ready to take requests")
return
logger.debug("Requesting ops to keystone")
app_data = self._identity_resource_rel.data[self.charm.app]
app_data["request"] = json.dumps(request)
self.save_request_in_store(id_, tag, ops, REQUEST_SENT)
class IdentityOpsRequestEvent(EventBase):
"""Has IdentityOpsRequest Event."""
def __init__(self, handle, relation_id, relation_name, request):
"""Initialise event."""
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
self.request = request
def snapshot(self):
"""Snapshot the event."""
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
"request": self.request,
}
def restore(self, snapshot):
"""Restore the event."""
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
self.request = snapshot["request"]
class IdentityResourceProviderEvents(ObjectEvents):
"""Events class for `on`."""
process_op = EventSource(IdentityOpsRequestEvent)
class IdentityResourceProvides(Object):
"""IdentityResourceProvides class."""
on = IdentityResourceProviderEvents()
def __init__(self, charm: CharmBase, relation_name: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_resource_relation_changed,
)
def _on_identity_resource_relation_changed(
self, event: RelationChangedEvent
):
"""Handle IdentityResource changed."""
request = event.relation.data[event.relation.app].get("request", {})
self.on.process_op.emit(
event.relation.id, event.relation.name, request
)
def set_ops_response(
self, relation_id: str, relation_name: str, ops_response: dict
) -> None:
"""Set response to ops request."""
if not self.model.unit.is_leader():
logger.debug("Not a leader unit, not sending response")
return
logger.debug("Update response from keystone")
_identity_resource_rel = self.charm.model.get_relation(
relation_name, relation_id
)
if not _identity_resource_rel:
# Relation has disappeared so skip send of data
return
app_data = _identity_resource_rel.data[self.charm.app]
app_data["response"] = json.dumps(ops_response)

525
lib/charms/keystone_k8s/v1/identity_service.py
View File

@@ -1,525 +0,0 @@
"""IdentityServiceProvides and Requires module.
This library contains the Requires and Provides classes for handling
the identity_service interface.
Import `IdentityServiceRequires` in your charm, with the charm object and the
relation name:
- self
- "identity_service"
Also provide additional parameters to the charm object:
- service
- internal_url
- public_url
- admin_url
- region
- username
- vhost
Two events are also available to respond to:
- connected
- ready
- goneaway
A basic example showing the usage of this relation follows:
```
from charms.keystone_k8s.v1.identity_service import IdentityServiceRequires
class IdentityServiceClientCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
# IdentityService Requires
self.identity_service = IdentityServiceRequires(
self, "identity_service",
service = "my-service"
internal_url = "http://internal-url"
public_url = "http://public-url"
admin_url = "http://admin-url"
region = "region"
)
self.framework.observe(
self.identity_service.on.connected, self._on_identity_service_connected)
self.framework.observe(
self.identity_service.on.ready, self._on_identity_service_ready)
self.framework.observe(
self.identity_service.on.goneaway, self._on_identity_service_goneaway)
def _on_identity_service_connected(self, event):
'''React to the IdentityService connected event.
This event happens when n IdentityService relation is added to the
model before credentials etc have been provided.
'''
# Do something before the relation is complete
pass
def _on_identity_service_ready(self, event):
'''React to the IdentityService ready event.
The IdentityService interface will use the provided config for the
request to the identity server.
'''
# IdentityService Relation is ready. Do something with the completed relation.
pass
def _on_identity_service_goneaway(self, event):
'''React to the IdentityService goneaway event.
This event happens when an IdentityService relation is removed.
'''
# IdentityService Relation has goneaway. shutdown services or suchlike
pass
```
"""
import json
import logging
from ops.framework import (
StoredState,
EventBase,
ObjectEvents,
EventSource,
Object,
)
from ops.model import (
Relation,
SecretNotFoundError,
)
logger = logging.getLogger(__name__)
# The unique Charmhub library identifier, never change it
LIBID = "0fa7fe7236c14c6e9624acf232b9a3b0"
# Increment this major API version when introducing breaking changes
LIBAPI = 1
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 1
logger = logging.getLogger(__name__)
class IdentityServiceConnectedEvent(EventBase):
"""IdentityService connected Event."""
pass
class IdentityServiceReadyEvent(EventBase):
"""IdentityService ready for use Event."""
pass
class IdentityServiceGoneAwayEvent(EventBase):
"""IdentityService relation has gone-away Event"""
pass
class IdentityServiceServerEvents(ObjectEvents):
"""Events class for `on`"""
connected = EventSource(IdentityServiceConnectedEvent)
ready = EventSource(IdentityServiceReadyEvent)
goneaway = EventSource(IdentityServiceGoneAwayEvent)
class IdentityServiceRequires(Object):
"""
IdentityServiceRequires class
"""
on = IdentityServiceServerEvents()
_stored = StoredState()
def __init__(self, charm, relation_name: str, service_endpoints: dict,
region: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.service_endpoints = service_endpoints
self.region = region
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_identity_service_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_departed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_identity_service_relation_broken,
)
def _on_identity_service_relation_joined(self, event):
"""IdentityService relation joined."""
logging.debug("IdentityService on_joined")
self.on.connected.emit()
self.register_services(
self.service_endpoints,
self.region)
def _on_identity_service_relation_changed(self, event):
"""IdentityService relation changed."""
logging.debug("IdentityService on_changed")
try:
self.service_password
self.on.ready.emit()
except (AttributeError, KeyError):
pass
def _on_identity_service_relation_broken(self, event):
"""IdentityService relation broken."""
logging.debug("IdentityService on_broken")
self.on.goneaway.emit()
@property
def _identity_service_rel(self) -> Relation:
"""The IdentityService relation."""
return self.framework.model.get_relation(self.relation_name)
def get_remote_app_data(self, key: str) -> str:
"""Return the value for the given key from remote app data."""
data = self._identity_service_rel.data[self._identity_service_rel.app]
return data.get(key)
@property
def api_version(self) -> str:
"""Return the api_version."""
return self.get_remote_app_data('api-version')
@property
def auth_host(self) -> str:
"""Return the auth_host."""
return self.get_remote_app_data('auth-host')
@property
def auth_port(self) -> str:
"""Return the auth_port."""
return self.get_remote_app_data('auth-port')
@property
def auth_protocol(self) -> str:
"""Return the auth_protocol."""
return self.get_remote_app_data('auth-protocol')
@property
def internal_host(self) -> str:
"""Return the internal_host."""
return self.get_remote_app_data('internal-host')
@property
def internal_port(self) -> str:
"""Return the internal_port."""
return self.get_remote_app_data('internal-port')
@property
def internal_protocol(self) -> str:
"""Return the internal_protocol."""
return self.get_remote_app_data('internal-protocol')
@property
def admin_domain_name(self) -> str:
"""Return the admin_domain_name."""
return self.get_remote_app_data('admin-domain-name')
@property
def admin_domain_id(self) -> str:
"""Return the admin_domain_id."""
return self.get_remote_app_data('admin-domain-id')
@property
def admin_project_name(self) -> str:
"""Return the admin_project_name."""
return self.get_remote_app_data('admin-project-name')
@property
def admin_project_id(self) -> str:
"""Return the admin_project_id."""
return self.get_remote_app_data('admin-project-id')
@property
def admin_user_name(self) -> str:
"""Return the admin_user_name."""
return self.get_remote_app_data('admin-user-name')
@property
def admin_user_id(self) -> str:
"""Return the admin_user_id."""
return self.get_remote_app_data('admin-user-id')
@property
def service_domain_name(self) -> str:
"""Return the service_domain_name."""
return self.get_remote_app_data('service-domain-name')
@property
def service_domain_id(self) -> str:
"""Return the service_domain_id."""
return self.get_remote_app_data('service-domain-id')
@property
def service_host(self) -> str:
"""Return the service_host."""
return self.get_remote_app_data('service-host')
@property
def service_credentials(self) -> str:
"""Return the service_credentials secret."""
return self.get_remote_app_data('service-credentials')
@property
def service_password(self) -> str:
"""Return the service_password."""
credentials_id = self.get_remote_app_data('service-credentials')
if not credentials_id:
return None
try:
credentials = self.charm.model.get_secret(id=credentials_id)
return credentials.get_content().get("password")
except SecretNotFoundError:
logger.warning(f"Secret {credentials_id} not found")
return None
@property
def service_port(self) -> str:
"""Return the service_port."""
return self.get_remote_app_data('service-port')
@property
def service_protocol(self) -> str:
"""Return the service_protocol."""
return self.get_remote_app_data('service-protocol')
@property
def service_project_name(self) -> str:
"""Return the service_project_name."""
return self.get_remote_app_data('service-project-name')
@property
def service_project_id(self) -> str:
"""Return the service_project_id."""
return self.get_remote_app_data('service-project-id')
@property
def service_user_name(self) -> str:
"""Return the service_user_name."""
credentials_id = self.get_remote_app_data('service-credentials')
if not credentials_id:
return None
try:
credentials = self.charm.model.get_secret(id=credentials_id)
return credentials.get_content().get("username")
except SecretNotFoundError:
logger.warning(f"Secret {credentials_id} not found")
return None
@property
def service_user_id(self) -> str:
"""Return the service_user_id."""
return self.get_remote_app_data('service-user-id')
@property
def internal_auth_url(self) -> str:
"""Return the internal_auth_url."""
return self.get_remote_app_data('internal-auth-url')
@property
def admin_auth_url(self) -> str:
"""Return the admin_auth_url."""
return self.get_remote_app_data('admin-auth-url')
@property
def public_auth_url(self) -> str:
"""Return the public_auth_url."""
return self.get_remote_app_data('public-auth-url')
@property
def admin_role(self) -> str:
"""Return the admin_role."""
return self.get_remote_app_data('admin-role')
def register_services(self, service_endpoints: dict,
region: str) -> None:
"""Request access to the IdentityService server."""
if self.model.unit.is_leader():
logging.debug("Requesting service registration")
app_data = self._identity_service_rel.data[self.charm.app]
app_data["service-endpoints"] = json.dumps(
service_endpoints, sort_keys=True
)
app_data["region"] = region
class HasIdentityServiceClientsEvent(EventBase):
"""Has IdentityServiceClients Event."""
pass
class ReadyIdentityServiceClientsEvent(EventBase):
"""IdentityServiceClients Ready Event."""
def __init__(self, handle, relation_id, relation_name, service_endpoints,
region, client_app_name):
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
self.service_endpoints = service_endpoints
self.region = region
self.client_app_name = client_app_name
def snapshot(self):
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
"service_endpoints": self.service_endpoints,
"client_app_name": self.client_app_name,
"region": self.region}
def restore(self, snapshot):
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
self.service_endpoints = snapshot["service_endpoints"]
self.region = snapshot["region"]
self.client_app_name = snapshot["client_app_name"]
class IdentityServiceClientEvents(ObjectEvents):
"""Events class for `on`"""
has_identity_service_clients = EventSource(HasIdentityServiceClientsEvent)
ready_identity_service_clients = EventSource(ReadyIdentityServiceClientsEvent)
class IdentityServiceProvides(Object):
"""
IdentityServiceProvides class
"""
on = IdentityServiceClientEvents()
_stored = StoredState()
def __init__(self, charm, relation_name):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_identity_service_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_identity_service_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_identity_service_relation_broken,
)
def _on_identity_service_relation_joined(self, event):
"""Handle IdentityService joined."""
logging.debug("IdentityService on_joined")
self.on.has_identity_service_clients.emit()
def _on_identity_service_relation_changed(self, event):
"""Handle IdentityService changed."""
logging.debug("IdentityService on_changed")
REQUIRED_KEYS = [
'service-endpoints',
'region']
values = [
event.relation.data[event.relation.app].get(k)
for k in REQUIRED_KEYS
]
# Validate data on the relation
if all(values):
service_eps = json.loads(
event.relation.data[event.relation.app]['service-endpoints'])
self.on.ready_identity_service_clients.emit(
event.relation.id,
event.relation.name,
service_eps,
event.relation.data[event.relation.app]['region'],
event.relation.app.name)
def _on_identity_service_relation_broken(self, event):
"""Handle IdentityService broken."""
logging.debug("IdentityServiceProvides on_departed")
# TODO clear data on the relation
def set_identity_service_credentials(self, relation_name: int,
relation_id: str,
api_version: str,
auth_host: str,
auth_port: str,
auth_protocol: str,
internal_host: str,
internal_port: str,
internal_protocol: str,
service_host: str,
service_port: str,
service_protocol: str,
admin_domain: str,
admin_project: str,
admin_user: str,
service_domain: str,
service_project: str,
service_user: str,
internal_auth_url: str,
admin_auth_url: str,
public_auth_url: str,
service_credentials: str,
admin_role: str):
logging.debug("Setting identity_service connection information.")
_identity_service_rel = None
for relation in self.framework.model.relations[relation_name]:
if relation.id == relation_id:
_identity_service_rel = relation
if not _identity_service_rel:
# Relation has disappeared so skip send of data
return
app_data = _identity_service_rel.data[self.charm.app]
app_data["api-version"] = api_version
app_data["auth-host"] = auth_host
app_data["auth-port"] = str(auth_port)
app_data["auth-protocol"] = auth_protocol
app_data["internal-host"] = internal_host
app_data["internal-port"] = str(internal_port)
app_data["internal-protocol"] = internal_protocol
app_data["service-host"] = service_host
app_data["service-port"] = str(service_port)
app_data["service-protocol"] = service_protocol
app_data["admin-domain-name"] = admin_domain.name
app_data["admin-domain-id"] = admin_domain.id
app_data["admin-project-name"] = admin_project.name
app_data["admin-project-id"] = admin_project.id
app_data["admin-user-name"] = admin_user.name
app_data["admin-user-id"] = admin_user.id
app_data["service-domain-name"] = service_domain.name
app_data["service-domain-id"] = service_domain.id
app_data["service-project-name"] = service_project.name
app_data["service-project-id"] = service_project.id
app_data["service-user-id"] = service_user.id
app_data["internal-auth-url"] = internal_auth_url
app_data["admin-auth-url"] = admin_auth_url
app_data["public-auth-url"] = public_auth_url
app_data["service-credentials"] = service_credentials
app_data["admin-role"] = admin_role

286
lib/charms/rabbitmq_k8s/v0/rabbitmq.py
View File

@@ -1,286 +0,0 @@
"""RabbitMQProvides and Requires module.
This library contains the Requires and Provides classes for handling
the rabbitmq interface.
Import `RabbitMQRequires` in your charm, with the charm object and the
relation name:
- self
- "amqp"
Also provide two additional parameters to the charm object:
- username
- vhost
Two events are also available to respond to:
- connected
- ready
- goneaway
A basic example showing the usage of this relation follows:
```
from charms.rabbitmq_k8s.v0.rabbitmq import RabbitMQRequires
class RabbitMQClientCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
# RabbitMQ Requires
self.amqp = RabbitMQRequires(
self, "amqp",
username="myusername",
vhost="vhostname"
)
self.framework.observe(
self.amqp.on.connected, self._on_amqp_connected)
self.framework.observe(
self.amqp.on.ready, self._on_amqp_ready)
self.framework.observe(
self.amqp.on.goneaway, self._on_amqp_goneaway)
def _on_amqp_connected(self, event):
'''React to the RabbitMQ connected event.
This event happens when n RabbitMQ relation is added to the
model before credentials etc have been provided.
'''
# Do something before the relation is complete
pass
def _on_amqp_ready(self, event):
'''React to the RabbitMQ ready event.
The RabbitMQ interface will use the provided username and vhost for the
request to the rabbitmq server.
'''
# RabbitMQ Relation is ready. Do something with the completed relation.
pass
def _on_amqp_goneaway(self, event):
'''React to the RabbitMQ goneaway event.
This event happens when an RabbitMQ relation is removed.
'''
# RabbitMQ Relation has goneaway. shutdown services or suchlike
pass
```
"""
# The unique Charmhub library identifier, never change it
LIBID = "45622352791142fd9cf87232e3bd6f2a"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 1
import logging
from ops.framework import (
StoredState,
EventBase,
ObjectEvents,
EventSource,
Object,
)
from ops.model import Relation
from typing import List
logger = logging.getLogger(__name__)
class RabbitMQConnectedEvent(EventBase):
"""RabbitMQ connected Event."""
pass
class RabbitMQReadyEvent(EventBase):
"""RabbitMQ ready for use Event."""
pass
class RabbitMQGoneAwayEvent(EventBase):
"""RabbitMQ relation has gone-away Event"""
pass
class RabbitMQServerEvents(ObjectEvents):
"""Events class for `on`"""
connected = EventSource(RabbitMQConnectedEvent)
ready = EventSource(RabbitMQReadyEvent)
goneaway = EventSource(RabbitMQGoneAwayEvent)
class RabbitMQRequires(Object):
"""
RabbitMQRequires class
"""
on = RabbitMQServerEvents()
def __init__(self, charm, relation_name: str, username: str, vhost: str):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.username = username
self.vhost = vhost
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_amqp_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_departed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_amqp_relation_broken,
)
def _on_amqp_relation_joined(self, event):
"""RabbitMQ relation joined."""
logging.debug("RabbitMQRabbitMQRequires on_joined")
self.on.connected.emit()
self.request_access(self.username, self.vhost)
def _on_amqp_relation_changed(self, event):
"""RabbitMQ relation changed."""
logging.debug("RabbitMQRabbitMQRequires on_changed/departed")
if self.password:
self.on.ready.emit()
def _on_amqp_relation_broken(self, event):
"""RabbitMQ relation broken."""
logging.debug("RabbitMQRabbitMQRequires on_broken")
self.on.goneaway.emit()
@property
def _amqp_rel(self) -> Relation:
"""The RabbitMQ relation."""
return self.framework.model.get_relation(self.relation_name)
@property
def password(self) -> str:
"""Return the RabbitMQ password from the server side of the relation."""
return self._amqp_rel.data[self._amqp_rel.app].get("password")
@property
def hostname(self) -> str:
"""Return the hostname from the RabbitMQ relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("hostname")
@property
def ssl_port(self) -> str:
"""Return the SSL port from the RabbitMQ relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("ssl_port")
@property
def ssl_ca(self) -> str:
"""Return the SSL port from the RabbitMQ relation"""
return self._amqp_rel.data[self._amqp_rel.app].get("ssl_ca")
@property
def hostnames(self) -> List[str]:
"""Return a list of remote RMQ hosts from the RabbitMQ relation"""
_hosts = []
for unit in self._amqp_rel.units:
_hosts.append(self._amqp_rel.data[unit].get("ingress-address"))
return _hosts
def request_access(self, username: str, vhost: str) -> None:
"""Request access to the RabbitMQ server."""
if self.model.unit.is_leader():
logging.debug("Requesting RabbitMQ user and vhost")
self._amqp_rel.data[self.charm.app]["username"] = username
self._amqp_rel.data[self.charm.app]["vhost"] = vhost
class HasRabbitMQClientsEvent(EventBase):
"""Has RabbitMQClients Event."""
pass
class ReadyRabbitMQClientsEvent(EventBase):
"""RabbitMQClients Ready Event."""
pass
class RabbitMQClientEvents(ObjectEvents):
"""Events class for `on`"""
has_amqp_clients = EventSource(HasRabbitMQClientsEvent)
ready_amqp_clients = EventSource(ReadyRabbitMQClientsEvent)
class RabbitMQProvides(Object):
"""
RabbitMQProvides class
"""
on = RabbitMQClientEvents()
def __init__(self, charm, relation_name, callback):
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.callback = callback
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_amqp_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_amqp_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_amqp_relation_broken,
)
def _on_amqp_relation_joined(self, event):
"""Handle RabbitMQ joined."""
logging.debug("RabbitMQRabbitMQProvides on_joined data={}"
.format(event.relation.data[event.relation.app]))
self.on.has_amqp_clients.emit()
def _on_amqp_relation_changed(self, event):
"""Handle RabbitMQ changed."""
logging.debug("RabbitMQRabbitMQProvides on_changed data={}"
.format(event.relation.data[event.relation.app]))
# Validate data on the relation
if self.username(event) and self.vhost(event):
self.on.ready_amqp_clients.emit()
if self.charm.unit.is_leader():
self.callback(event, self.username(event), self.vhost(event))
else:
logging.warning("Received RabbitMQ changed event without the "
"expected keys ('username', 'vhost') in the "
"application data bag. Incompatible charm in "
"other end of relation?")
def _on_amqp_relation_broken(self, event):
"""Handle RabbitMQ broken."""
logging.debug("RabbitMQRabbitMQProvides on_departed")
# TODO clear data on the relation
def username(self, event):
"""Return the RabbitMQ username from the client side of the relation."""
return event.relation.data[event.relation.app].get("username")
def vhost(self, event):
"""Return the RabbitMQ vhost from the client side of the relation."""
return event.relation.data[event.relation.app].get("vhost")

734
lib/charms/traefik_k8s/v2/ingress.py
View File

@@ -1,734 +0,0 @@
# Copyright 2023 Canonical Ltd.
# See LICENSE file for licensing details.
r"""# Interface Library for ingress.
This library wraps relation endpoints using the `ingress` interface
and provides a Python API for both requesting and providing per-application
ingress, with load-balancing occurring across all units.
## Getting Started
To get started using the library, you just need to fetch the library using `charmcraft`.
```shell
cd some-charm
charmcraft fetch-lib charms.traefik_k8s.v1.ingress
```
In the `metadata.yaml` of the charm, add the following:
```yaml
requires:
ingress:
interface: ingress
limit: 1
```
Then, to initialise the library:
```python
from charms.traefik_k8s.v2.ingress import (IngressPerAppRequirer,
IngressPerAppReadyEvent, IngressPerAppRevokedEvent)
class SomeCharm(CharmBase):
def __init__(self, *args):
# ...
self.ingress = IngressPerAppRequirer(self, port=80)
# The following event is triggered when the ingress URL to be used
# by this deployment of the `SomeCharm` is ready (or changes).
self.framework.observe(
self.ingress.on.ready, self._on_ingress_ready
)
self.framework.observe(
self.ingress.on.revoked, self._on_ingress_revoked
)
def _on_ingress_ready(self, event: IngressPerAppReadyEvent):
logger.info("This app's ingress URL: %s", event.url)
def _on_ingress_revoked(self, event: IngressPerAppRevokedEvent):
logger.info("This app no longer has ingress")
"""
import json
import logging
import socket
import typing
from dataclasses import dataclass
from typing import (
Any,
Dict,
List,
MutableMapping,
Optional,
Sequence,
Tuple,
)
import pydantic
from ops.charm import CharmBase, RelationBrokenEvent, RelationEvent
from ops.framework import EventSource, Object, ObjectEvents, StoredState
from ops.model import ModelError, Relation, Unit
from pydantic import AnyHttpUrl, BaseModel, Field, validator
# The unique Charmhub library identifier, never change it
LIBID = "e6de2a5cd5b34422a204668f3b8f90d2"
# Increment this major API version when introducing breaking changes
LIBAPI = 2
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 6
PYDEPS = ["pydantic<2.0"]
DEFAULT_RELATION_NAME = "ingress"
RELATION_INTERFACE = "ingress"
log = logging.getLogger(__name__)
BUILTIN_JUJU_KEYS = {"ingress-address", "private-address", "egress-subnets"}
class DatabagModel(BaseModel):
"""Base databag model."""
class Config:
"""Pydantic config."""
allow_population_by_field_name = True
"""Allow instantiating this class by field name (instead of forcing alias)."""
_NEST_UNDER = None
@classmethod
def load(cls, databag: MutableMapping):
"""Load this model from a Juju databag."""
if cls._NEST_UNDER:
return cls.parse_obj(json.loads(databag[cls._NEST_UNDER]))
try:
data = {k: json.loads(v) for k, v in databag.items() if k not in BUILTIN_JUJU_KEYS}
except json.JSONDecodeError as e:
msg = f"invalid databag contents: expecting json. {databag}"
log.error(msg)
raise DataValidationError(msg) from e
try:
return cls.parse_raw(json.dumps(data)) # type: ignore
except pydantic.ValidationError as e:
msg = f"failed to validate databag: {databag}"
log.error(msg, exc_info=True)
raise DataValidationError(msg) from e
def dump(self, databag: Optional[MutableMapping] = None, clear: bool = True):
"""Write the contents of this model to Juju databag.
:param databag: the databag to write the data to.
:param clear: ensure the databag is cleared before writing it.
"""
if clear and databag:
databag.clear()
if databag is None:
databag = {}
if self._NEST_UNDER:
databag[self._NEST_UNDER] = self.json()
dct = self.dict()
for key, field in self.__fields__.items(): # type: ignore
value = dct[key]
databag[field.alias or key] = json.dumps(value)
return databag
# todo: import these models from charm-relation-interfaces/ingress/v2 instead of redeclaring them
class IngressUrl(BaseModel):
"""Ingress url schema."""
url: AnyHttpUrl
class IngressProviderAppData(DatabagModel):
"""Ingress application databag schema."""
ingress: IngressUrl
class ProviderSchema(BaseModel):
"""Provider schema for Ingress."""
app: IngressProviderAppData
class IngressRequirerAppData(DatabagModel):
"""Ingress requirer application databag model."""
model: str = Field(description="The model the application is in.")
name: str = Field(description="the name of the app requesting ingress.")
port: int = Field(description="The port the app wishes to be exposed.")
# fields on top of vanilla 'ingress' interface:
strip_prefix: Optional[bool] = Field(
description="Whether to strip the prefix from the ingress url.", alias="strip-prefix"
)
redirect_https: Optional[bool] = Field(
description="Whether to redirect http traffic to https.", alias="redirect-https"
)
scheme: Optional[str] = Field(
default="http", description="What scheme to use in the generated ingress url"
)
@validator("scheme", pre=True)
def validate_scheme(cls, scheme): # noqa: N805 # pydantic wants 'cls' as first arg
"""Validate scheme arg."""
if scheme not in {"http", "https", "h2c"}:
raise ValueError("invalid scheme: should be one of `http|https|h2c`")
return scheme
@validator("port", pre=True)
def validate_port(cls, port): # noqa: N805 # pydantic wants 'cls' as first arg
"""Validate port."""
assert isinstance(port, int), type(port)
assert 0 < port < 65535, "port out of TCP range"
return port
class IngressRequirerUnitData(DatabagModel):
"""Ingress requirer unit databag model."""
host: str = Field(description="Hostname the unit wishes to be exposed.")
@validator("host", pre=True)
def validate_host(cls, host): # noqa: N805 # pydantic wants 'cls' as first arg
"""Validate host."""
assert isinstance(host, str), type(host)
return host
class RequirerSchema(BaseModel):
"""Requirer schema for Ingress."""
app: IngressRequirerAppData
unit: IngressRequirerUnitData
class IngressError(RuntimeError):
"""Base class for custom errors raised by this library."""
class NotReadyError(IngressError):
"""Raised when a relation is not ready."""
class DataValidationError(IngressError):
"""Raised when data validation fails on IPU relation data."""
class _IngressPerAppBase(Object):
"""Base class for IngressPerUnit interface classes."""
def __init__(self, charm: CharmBase, relation_name: str = DEFAULT_RELATION_NAME):
super().__init__(charm, relation_name)
self.charm: CharmBase = charm
self.relation_name = relation_name
self.app = self.charm.app
self.unit = self.charm.unit
observe = self.framework.observe
rel_events = charm.on[relation_name]
observe(rel_events.relation_created, self._handle_relation)
observe(rel_events.relation_joined, self._handle_relation)
observe(rel_events.relation_changed, self._handle_relation)
observe(rel_events.relation_broken, self._handle_relation_broken)
observe(charm.on.leader_elected, self._handle_upgrade_or_leader) # type: ignore
observe(charm.on.upgrade_charm, self._handle_upgrade_or_leader) # type: ignore
@property
def relations(self):
"""The list of Relation instances associated with this endpoint."""
return list(self.charm.model.relations[self.relation_name])
def _handle_relation(self, event):
"""Subclasses should implement this method to handle a relation update."""
pass
def _handle_relation_broken(self, event):
"""Subclasses should implement this method to handle a relation breaking."""
pass
def _handle_upgrade_or_leader(self, event):
"""Subclasses should implement this method to handle upgrades or leadership change."""
pass
class _IPAEvent(RelationEvent):
__args__: Tuple[str, ...] = ()
__optional_kwargs__: Dict[str, Any] = {}
@classmethod
def __attrs__(cls):
return cls.__args__ + tuple(cls.__optional_kwargs__.keys())
def __init__(self, handle, relation, *args, **kwargs):
super().__init__(handle, relation)
if not len(self.__args__) == len(args):
raise TypeError("expected {} args, got {}".format(len(self.__args__), len(args)))
for attr, obj in zip(self.__args__, args):
setattr(self, attr, obj)
for attr, default in self.__optional_kwargs__.items():
obj = kwargs.get(attr, default)
setattr(self, attr, obj)
def snapshot(self):
dct = super().snapshot()
for attr in self.__attrs__():
obj = getattr(self, attr)
try:
dct[attr] = obj
except ValueError as e:
raise ValueError(
"cannot automagically serialize {}: "
"override this method and do it "
"manually.".format(obj)
) from e
return dct
def restore(self, snapshot) -> None:
super().restore(snapshot)
for attr, obj in snapshot.items():
setattr(self, attr, obj)
class IngressPerAppDataProvidedEvent(_IPAEvent):
"""Event representing that ingress data has been provided for an app."""
__args__ = ("name", "model", "hosts", "strip_prefix", "redirect_https")
if typing.TYPE_CHECKING:
name: Optional[str] = None
model: Optional[str] = None
# sequence of hostname, port dicts
hosts: Sequence["IngressRequirerUnitData"] = ()
strip_prefix: bool = False
redirect_https: bool = False
class IngressPerAppDataRemovedEvent(RelationEvent):
"""Event representing that ingress data has been removed for an app."""
class IngressPerAppProviderEvents(ObjectEvents):
"""Container for IPA Provider events."""
data_provided = EventSource(IngressPerAppDataProvidedEvent)
data_removed = EventSource(IngressPerAppDataRemovedEvent)
@dataclass
class IngressRequirerData:
"""Data exposed by the ingress requirer to the provider."""
app: "IngressRequirerAppData"
units: List["IngressRequirerUnitData"]
class TlsProviderType(typing.Protocol):
"""Placeholder."""
@property
def enabled(self) -> bool: # type: ignore
"""Placeholder."""
class IngressPerAppProvider(_IngressPerAppBase):
"""Implementation of the provider of ingress."""
on = IngressPerAppProviderEvents() # type: ignore
def __init__(
self,
charm: CharmBase,
relation_name: str = DEFAULT_RELATION_NAME,
):
"""Constructor for IngressPerAppProvider.
Args:
charm: The charm that is instantiating the instance.
relation_name: The name of the relation endpoint to bind to
(defaults to "ingress").
"""
super().__init__(charm, relation_name)
def _handle_relation(self, event):
# created, joined or changed: if remote side has sent the required data:
# notify listeners.
if self.is_ready(event.relation):
data = self.get_data(event.relation)
self.on.data_provided.emit( # type: ignore
event.relation,
data.app.name,
data.app.model,
[unit.dict() for unit in data.units],
data.app.strip_prefix or False,
data.app.redirect_https or False,
)
def _handle_relation_broken(self, event):
self.on.data_removed.emit(event.relation) # type: ignore
def wipe_ingress_data(self, relation: Relation):
"""Clear ingress data from relation."""
assert self.unit.is_leader(), "only leaders can do this"
try:
relation.data
except ModelError as e:
log.warning(
"error {} accessing relation data for {!r}. "
"Probably a ghost of a dead relation is still "
"lingering around.".format(e, relation.name)
)
return
del relation.data[self.app]["ingress"]
def _get_requirer_units_data(self, relation: Relation) -> List["IngressRequirerUnitData"]:
"""Fetch and validate the requirer's app databag."""
out: List["IngressRequirerUnitData"] = []
unit: Unit
for unit in relation.units:
databag = relation.data[unit]
try:
data = IngressRequirerUnitData.load(databag)
out.append(data)
except pydantic.ValidationError:
log.info(f"failed to validate remote unit data for {unit}")
raise
return out
@staticmethod
def _get_requirer_app_data(relation: Relation) -> "IngressRequirerAppData":
"""Fetch and validate the requirer's app databag."""
app = relation.app
if app is None:
raise NotReadyError(relation)
databag = relation.data[app]
return IngressRequirerAppData.load(databag)
def get_data(self, relation: Relation) -> IngressRequirerData:
"""Fetch the remote (requirer) app and units' databags."""
try:
return IngressRequirerData(
self._get_requirer_app_data(relation), self._get_requirer_units_data(relation)
)
except (pydantic.ValidationError, DataValidationError) as e:
raise DataValidationError("failed to validate ingress requirer data") from e
def is_ready(self, relation: Optional[Relation] = None):
"""The Provider is ready if the requirer has sent valid data."""
if not relation:
return any(map(self.is_ready, self.relations))
try:
self.get_data(relation)
except (DataValidationError, NotReadyError) as e:
log.debug("Provider not ready; validation error encountered: %s" % str(e))
return False
return True
def _published_url(self, relation: Relation) -> Optional["IngressProviderAppData"]:
"""Fetch and validate this app databag; return the ingress url."""
if not self.is_ready(relation) or not self.unit.is_leader():
# Handle edge case where remote app name can be missing, e.g.,
# relation_broken events.
# Also, only leader units can read own app databags.
# FIXME https://github.com/canonical/traefik-k8s-operator/issues/34
return None
# fetch the provider's app databag
databag = relation.data[self.app]
if not databag.get("ingress"):
raise NotReadyError("This application did not `publish_url` yet.")
return IngressProviderAppData.load(databag)
def publish_url(self, relation: Relation, url: str):
"""Publish to the app databag the ingress url."""
ingress_url = {"url": url}
IngressProviderAppData.parse_obj({"ingress": ingress_url}).dump(relation.data[self.app])
@property
def proxied_endpoints(self) -> Dict[str, str]:
"""Returns the ingress settings provided to applications by this IngressPerAppProvider.
For example, when this IngressPerAppProvider has provided the
`http://foo.bar/my-model.my-app` URL to the my-app application, the returned dictionary
will be:
```
{
"my-app": {
"url": "http://foo.bar/my-model.my-app"
}
}
```
"""
results = {}
for ingress_relation in self.relations:
if not ingress_relation.app:
log.warning(
f"no app in relation {ingress_relation} when fetching proxied endpoints: skipping"
)
continue
try:
ingress_data = self._published_url(ingress_relation)
except NotReadyError:
log.warning(
f"no published url found in {ingress_relation}: "
f"traefik didn't publish_url yet to this relation."
)
continue
if not ingress_data:
log.warning(f"relation {ingress_relation} not ready yet: try again in some time.")
continue
results[ingress_relation.app.name] = ingress_data.ingress.dict()
return results
class IngressPerAppReadyEvent(_IPAEvent):
"""Event representing that ingress for an app is ready."""
__args__ = ("url",)
if typing.TYPE_CHECKING:
url: Optional[str] = None
class IngressPerAppRevokedEvent(RelationEvent):
"""Event representing that ingress for an app has been revoked."""
class IngressPerAppRequirerEvents(ObjectEvents):
"""Container for IPA Requirer events."""
ready = EventSource(IngressPerAppReadyEvent)
revoked = EventSource(IngressPerAppRevokedEvent)
class IngressPerAppRequirer(_IngressPerAppBase):
"""Implementation of the requirer of the ingress relation."""
on = IngressPerAppRequirerEvents() # type: ignore
# used to prevent spurious urls to be sent out if the event we're currently
# handling is a relation-broken one.
_stored = StoredState()
def __init__(
self,
charm: CharmBase,
relation_name: str = DEFAULT_RELATION_NAME,
*,
host: Optional[str] = None,
port: Optional[int] = None,
strip_prefix: bool = False,
redirect_https: bool = False,
# fixme: this is horrible UX.
# shall we switch to manually calling provide_ingress_requirements with all args when ready?
scheme: typing.Callable[[], str] = lambda: "http",
):
"""Constructor for IngressRequirer.
The request args can be used to specify the ingress properties when the
instance is created. If any are set, at least `port` is required, and
they will be sent to the ingress provider as soon as it is available.
All request args must be given as keyword args.
Args:
charm: the charm that is instantiating the library.
relation_name: the name of the relation endpoint to bind to (defaults to `ingress`);
relation must be of interface type `ingress` and have "limit: 1")
host: Hostname to be used by the ingress provider to address the requiring
application; if unspecified, the default Kubernetes service name will be used.
strip_prefix: configure Traefik to strip the path prefix.
redirect_https: redirect incoming requests to HTTPS.
scheme: callable returning the scheme to use when constructing the ingress url.
Request Args:
port: the port of the service
"""
super().__init__(charm, relation_name)
self.charm: CharmBase = charm
self.relation_name = relation_name
self._strip_prefix = strip_prefix
self._redirect_https = redirect_https
self._get_scheme = scheme
self._stored.set_default(current_url=None) # type: ignore
# if instantiated with a port, and we are related, then
# we immediately publish our ingress data to speed up the process.
if port:
self._auto_data = host, port
else:
self._auto_data = None
def _handle_relation(self, event):
# created, joined or changed: if we have auto data: publish it
self._publish_auto_data()
if self.is_ready():
# Avoid spurious events, emit only when there is a NEW URL available
new_url = (
None
if isinstance(event, RelationBrokenEvent)
else self._get_url_from_relation_data()
)
if self._stored.current_url != new_url: # type: ignore
self._stored.current_url = new_url # type: ignore
self.on.ready.emit(event.relation, new_url) # type: ignore
def _handle_relation_broken(self, event):
self._stored.current_url = None # type: ignore
self.on.revoked.emit(event.relation) # type: ignore
def _handle_upgrade_or_leader(self, event):
"""On upgrade/leadership change: ensure we publish the data we have."""
self._publish_auto_data()
def is_ready(self):
"""The Requirer is ready if the Provider has sent valid data."""
try:
return bool(self._get_url_from_relation_data())
except DataValidationError as e:
log.debug("Requirer not ready; validation error encountered: %s" % str(e))
return False
def _publish_auto_data(self):
if self._auto_data:
host, port = self._auto_data
self.provide_ingress_requirements(host=host, port=port)
def provide_ingress_requirements(
self,
*,
scheme: Optional[str] = None,
host: Optional[str] = None,
port: int,
):
"""Publishes the data that Traefik needs to provide ingress.
Args:
scheme: Scheme to be used; if unspecified, use the one used by __init__.
host: Hostname to be used by the ingress provider to address the
requirer unit; if unspecified, FQDN will be used instead
port: the port of the service (required)
"""
for relation in self.relations:
self._provide_ingress_requirements(scheme, host, port, relation)
def _provide_ingress_requirements(
self,
scheme: Optional[str],
host: Optional[str],
port: int,
relation: Relation,
):
if self.unit.is_leader():
self._publish_app_data(scheme, port, relation)
self._publish_unit_data(host, relation)
def _publish_unit_data(
self,
host: Optional[str],
relation: Relation,
):
if not host:
host = socket.getfqdn()
unit_databag = relation.data[self.unit]
try:
IngressRequirerUnitData(host=host).dump(unit_databag)
except pydantic.ValidationError as e:
msg = "failed to validate unit data"
log.info(msg, exc_info=True) # log to INFO because this might be expected
raise DataValidationError(msg) from e
def _publish_app_data(
self,
scheme: Optional[str],
port: int,
relation: Relation,
):
# assumes leadership!
app_databag = relation.data[self.app]
if not scheme:
# If scheme was not provided, use the one given to the constructor.
scheme = self._get_scheme()
try:
IngressRequirerAppData( # type: ignore # pyright does not like aliases
model=self.model.name,
name=self.app.name,
scheme=scheme,
port=port,
strip_prefix=self._strip_prefix, # type: ignore # pyright does not like aliases
redirect_https=self._redirect_https, # type: ignore # pyright does not like aliases
).dump(app_databag)
except pydantic.ValidationError as e:
msg = "failed to validate app data"
log.info(msg, exc_info=True) # log to INFO because this might be expected
raise DataValidationError(msg) from e
@property
def relation(self):
"""The established Relation instance, or None."""
return self.relations[0] if self.relations else None
def _get_url_from_relation_data(self) -> Optional[str]:
"""The full ingress URL to reach the current unit.
Returns None if the URL isn't available yet.
"""
relation = self.relation
if not relation or not relation.app:
return None
# fetch the provider's app databag
try:
databag = relation.data[relation.app]
except ModelError as e:
log.debug(
f"Error {e} attempting to read remote app data; "
f"probably we are in a relation_departed hook"
)
return None
if not databag: # not ready yet
return None
return str(IngressProviderAppData.load(databag).ingress.url)
@property
def url(self) -> Optional[str]:
"""The full ingress URL to reach the current unit.
Returns None if the URL isn't available yet.
"""
data = (
typing.cast(Optional[str], self._stored.current_url) # type: ignore
or self._get_url_from_relation_data()
)
return data

528
lib/charms/vault_k8s/v0/vault_kv.py
View File

@@ -1,528 +0,0 @@
#!/usr/bin/env python3
# Copyright 2023 Canonical Ltd.
# See LICENSE file for licensing details.
"""Library for the vault-kv relation.
This library contains the Requires and Provides classes for handling the vault-kv
interface.
## Getting Started
From a charm directory, fetch the library using `charmcraft`:
```shell
charmcraft fetch-lib charms.vault_k8s.v0.vault_kv
```
### Requirer charm
The requirer charm is the charm requiring a secret value store. In this example, the requirer charm
is requiring a secret value store.
```python
import secrets
from charms.vault_k8s.v0 import vault_kv
from ops.charm import CharmBase, InstallEvent
from ops.main import main
from ops.model import ActiveStatus, BlockedStatus
NONCE_SECRET_LABEL = "nonce"
class ExampleRequirerCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
self.interface = vault_kv.VaultKvRequires(
self,
"vault-kv",
"my-suffix",
)
self.framework.observe(self.on.install, self._on_install)
self.framework.observe(self.interface.on.connected, self._on_connected)
self.framework.observe(self.interface.on.ready, self._on_ready)
self.framework.observe(self.interface.on.gone_away, self._on_gone_away)
self.framework.observe(self.on.update_status, self._on_update_status)
def _on_install(self, event: InstallEvent):
self.unit.add_secret(
{"nonce": secrets.token_hex(16)},
label=NONCE_SECRET_LABEL,
description="Nonce for vault-kv relation",
)
self.unit.status = BlockedStatus("Waiting for vault-kv relation")
def _on_connected(self, event: vault_kv.VaultKvConnectedEvent):
relation = self.model.get_relation(event.relation_name, event.relation_id)
egress_subnet = str(self.model.get_binding(relation).network.interfaces[0].subnet)
self.interface.request_credentials(relation, egress_subnet, self.get_nonce())
def _on_ready(self, event: vault_kv.VaultKvReadyEvent):
relation = self.model.get_relation(event.relation_name, event.relation_id)
if relation is None:
return
vault_url = self.interface.get_vault_url(relation)
ca_certificate = self.interface.get_ca_certificate(relation)
mount = self.interface.get_mount(relation)
unit_credentials = self.interface.get_unit_credentials(relation)
# unit_credentials is a juju secret id
secret = self.model.get_secret(id=unit_credentials)
secret_content = secret.get_content()
role_id = secret_content["role-id"]
role_secret_id = secret_content["role-secret-id"]
self._configure(vault_url, ca_certificate, mount, role_id, role_secret_id)
self.unit.status = ActiveStatus()
def _on_gone_away(self, event: vault_kv.VaultKvGoneAwayEvent):
self.unit.status = BlockedStatus("Waiting for vault-kv relation")
def _configure(
self,
vault_url: str,
ca_certificate: str,
mount: str,
role_id: str,
role_secret_id: str,
):
pass
def _on_update_status(self, event):
# Check somewhere that egress subnet has not changed i.e. pod has not been rescheduled
# Update status might not be the best place
binding = self.model.get_binding("vault-kv")
if binding is not None:
egress_subnet = str(binding.network.interfaces[0].subnet)
self.interface.request_credentials(event.relation, egress_subnet, self.get_nonce())
def get_nonce(self):
secret = self.model.get_secret(label=NONCE_SECRET_LABEL)
nonce = secret.get_content()["nonce"]
return nonce
if __name__ == "__main__":
main(ExampleRequirerCharm)
```
You can integrate both charms by running:
```bash
juju integrate <vault provider charm> <vault requirer charm>
```
"""
import json
import logging
from typing import Any, Dict, Iterable, Mapping, Optional, Union
import ops
from interface_tester.schema_base import DataBagSchema # type: ignore[import]
from pydantic import BaseModel, Field, Json, ValidationError
logger = logging.getLogger(__name__)
# The unique Charmhub library identifier, never change it
LIBID = "591d6d2fb6a54853b4bb53ef16ef603a"
# Increment this major API version when introducing breaking changes
LIBAPI = 0
# Increment this PATCH version before using `charmcraft publish-lib` or reset
# to 0 if you are raising the major API version
LIBPATCH = 1
PYDEPS = ["pydantic", "pytest-interface-tester"]
class VaultKvProviderSchema(BaseModel):
"""Provider side of the vault-kv interface."""
vault_url: str = Field(description="The URL of the Vault server to connect to.")
mount: str = Field(
description=(
"The KV mount available for the requirer application, "
"respecting the pattern 'charm-<requirer app>-<user provided suffix>'."
)
)
ca_certificate: str = Field(
description="The CA certificate to use when validating the Vault server's certificate."
)
credentials: Json[Mapping[str, str]] = Field(
description=(
"Mapping of unit name and credentials for that unit."
" Credentials are a juju secret containing a 'role-id' and a 'role-secret-id'."
)
)
class AppVaultKvRequirerSchema(BaseModel):
"""App schema of the requirer side of the vault-kv interface."""
mount_suffix: str = Field(
description="Suffix to append to the mount name to get the KV mount."
)
class UnitVaultKvRequirerSchema(BaseModel):
"""Unit schema of the requirer side of the vault-kv interface."""
egress_subnet: str = Field(description="Egress subnet to use, in CIDR notation.")
nonce: str = Field(
description="Uniquely identifying value for this unit. `secrets.token_hex(16)` is recommended."
)
class ProviderSchema(DataBagSchema):
"""The schema for the provider side of this interface."""
app: VaultKvProviderSchema
class RequirerSchema(DataBagSchema):
"""The schema for the requirer side of this interface."""
app: AppVaultKvRequirerSchema
unit: UnitVaultKvRequirerSchema
def is_requirer_data_valid(app_data: dict, unit_data: dict) -> bool:
"""Return whether the requirer data is valid."""
try:
RequirerSchema(
app=AppVaultKvRequirerSchema(**app_data),
unit=UnitVaultKvRequirerSchema(**unit_data),
)
return True
except ValidationError as e:
logger.debug("Invalid data: %s", e)
return False
def is_provider_data_valid(data: dict) -> bool:
"""Return whether the provider data is valid."""
try:
ProviderSchema(app=VaultKvProviderSchema(**data))
return True
except ValidationError as e:
logger.debug("Invalid data: %s", e)
return False
class NewVaultKvClientAttachedEvent(ops.EventBase):
"""New vault kv client attached event."""
def __init__(
self,
handle: ops.Handle,
relation_id: int,
relation_name: str,
mount_suffix: str,
):
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
self.mount_suffix = mount_suffix
def snapshot(self) -> dict:
"""Return snapshot data that should be persisted."""
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
"mount_suffix": self.mount_suffix,
}
def restore(self, snapshot: Dict[str, Any]):
"""Restore the value state from a given snapshot."""
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
self.mount_suffix = snapshot["mount_suffix"]
class VaultKvProviderEvents(ops.ObjectEvents):
"""List of events that the Vault Kv provider charm can leverage."""
new_vault_kv_client_attached = ops.EventSource(NewVaultKvClientAttachedEvent)
class VaultKvProvides(ops.Object):
"""Class to be instanciated by the providing side of the relation."""
on = VaultKvProviderEvents()
def __init__(
self,
charm: ops.CharmBase,
relation_name: str,
) -> None:
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_relation_changed,
)
def _on_relation_changed(self, event: ops.RelationChangedEvent):
"""Handle client changed relation.
This handler will emit a new_vault_kv_client_attached event if at least one unit data is
valid.
"""
if event.app is None:
logger.debug("No remote application yet")
return
app_data = dict(event.relation.data[event.app])
any_valid = False
for unit in event.relation.units:
if not is_requirer_data_valid(app_data, dict(event.relation.data[unit])):
logger.debug("Invalid data from unit %r", unit.name)
continue
any_valid = True
if any_valid:
self.on.new_vault_kv_client_attached.emit(
event.relation.id,
event.relation.name,
event.relation.data[event.app]["mount_suffix"],
)
def set_vault_url(self, relation: ops.Relation, vault_url: str):
"""Set the vault_url on the relation."""
if not self.charm.unit.is_leader():
return
relation.data[self.charm.app]["vault_url"] = vault_url
def set_ca_certificate(self, relation: ops.Relation, ca_certificate: str):
"""Set the ca_certificate on the relation."""
if not self.charm.unit.is_leader():
return
relation.data[self.charm.app]["ca_certificate"] = ca_certificate
def set_mount(self, relation: ops.Relation, mount: str):
"""Set the mount on the relation."""
if not self.charm.unit.is_leader():
return
relation.data[self.charm.app]["mount"] = mount
def set_unit_credentials(self, relation: ops.Relation, nonce: str, secret: ops.Secret):
"""Set the unit credentials on the relation."""
if not self.charm.unit.is_leader():
return
credentials = self.get_credentials(relation)
if secret.id is None:
logger.debug(
"Secret id is None, not updating the relation '%s:%d' for nonce %r",
relation.name,
relation.id,
nonce,
)
return
credentials[nonce] = secret.id
relation.data[self.charm.app]["credentials"] = json.dumps(credentials, sort_keys=True)
def remove_unit_credentials(self, relation: ops.Relation, nonce: Union[str, Iterable[str]]):
"""Remove nonce(s) from the relation."""
if not self.charm.unit.is_leader():
return
if isinstance(nonce, str):
nonce = [nonce]
credentials = self.get_credentials(relation)
for n in nonce:
credentials.pop(n, None)
relation.data[self.charm.app]["credentials"] = json.dumps(credentials, sort_keys=True)
def get_credentials(self, relation: ops.Relation) -> dict:
"""Get the unit credentials from the relation."""
return json.loads(relation.data[self.charm.app].get("credentials", "{}"))
class VaultKvConnectedEvent(ops.EventBase):
"""VaultKvConnectedEvent Event."""
def __init__(
self,
handle: ops.Handle,
relation_id: int,
relation_name: str,
):
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
def snapshot(self) -> dict:
"""Return snapshot data that should be persisted."""
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
}
def restore(self, snapshot: Dict[str, Any]):
"""Restore the value state from a given snapshot."""
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
class VaultKvReadyEvent(ops.EventBase):
"""VaultKvReadyEvent Event."""
def __init__(
self,
handle: ops.Handle,
relation_id: int,
relation_name: str,
):
super().__init__(handle)
self.relation_id = relation_id
self.relation_name = relation_name
def snapshot(self) -> dict:
"""Return snapshot data that should be persisted."""
return {
"relation_id": self.relation_id,
"relation_name": self.relation_name,
}
def restore(self, snapshot: Dict[str, Any]):
"""Restore the value state from a given snapshot."""
super().restore(snapshot)
self.relation_id = snapshot["relation_id"]
self.relation_name = snapshot["relation_name"]
class VaultKvGoneAwayEvent(ops.EventBase):
"""VaultKvGoneAwayEvent Event."""
pass
class VaultKvRequireEvents(ops.ObjectEvents):
"""List of events that the Vault Kv requirer charm can leverage."""
connected = ops.EventSource(VaultKvConnectedEvent)
ready = ops.EventSource(VaultKvReadyEvent)
gone_away = ops.EventSource(VaultKvGoneAwayEvent)
class VaultKvRequires(ops.Object):
"""Class to be instanciated by the requiring side of the relation."""
on = VaultKvRequireEvents()
def __init__(
self,
charm: ops.CharmBase,
relation_name: str,
mount_suffix: str,
) -> None:
super().__init__(charm, relation_name)
self.charm = charm
self.relation_name = relation_name
self.mount_suffix = mount_suffix
self.framework.observe(
self.charm.on[relation_name].relation_joined,
self._on_vault_kv_relation_joined,
)
self.framework.observe(
self.charm.on[relation_name].relation_changed,
self._on_vault_kv_relation_changed,
)
self.framework.observe(
self.charm.on[relation_name].relation_broken,
self._on_vault_kv_relation_broken,
)
def _set_unit_nonce(self, relation: ops.Relation, nonce: str):
"""Set the nonce on the relation."""
relation.data[self.charm.unit]["nonce"] = nonce
def _set_unit_egress_subnet(self, relation: ops.Relation, egress_subnet: str):
"""Set the egress_subnet on the relation."""
relation.data[self.charm.unit]["egress_subnet"] = egress_subnet
def _on_vault_kv_relation_joined(self, event: ops.RelationJoinedEvent):
"""Handle relation joined.
Set the secret backend in the application databag if we are the leader.
Always update the egress_subnet in the unit databag.
"""
if self.charm.unit.is_leader():
event.relation.data[self.charm.app]["mount_suffix"] = self.mount_suffix
self.on.connected.emit(
event.relation.id,
event.relation.name,
)
def _on_vault_kv_relation_changed(self, event: ops.RelationChangedEvent):
"""Handle relation changed."""
if event.app is None:
logger.debug("No remote application yet")
return
if (
is_provider_data_valid(dict(event.relation.data[event.app]))
and self.get_unit_credentials(event.relation) is not None
):
self.on.ready.emit(
event.relation.id,
event.relation.name,
)
def _on_vault_kv_relation_broken(self, event: ops.RelationBrokenEvent):
"""Handle relation broken."""
self.on.gone_away.emit()
def request_credentials(self, relation: ops.Relation, egress_subnet: str, nonce: str) -> None:
"""Request credentials from the vault-kv relation.
Generated secret ids are tied to the unit egress_subnet, so if the egress_subnet
changes a new secret id must be generated.
A change in egress_subnet can happen when the pod is rescheduled to a different
node by the underlying substrate without a change from Juju.
"""
self._set_unit_egress_subnet(relation, egress_subnet)
self._set_unit_nonce(relation, nonce)
def get_vault_url(self, relation: ops.Relation) -> Optional[str]:
"""Return the vault_url from the relation."""
if relation.app is None:
return None
return relation.data[relation.app].get("vault_url")
def get_ca_certificate(self, relation: ops.Relation) -> Optional[str]:
"""Return the ca_certificate from the relation."""
if relation.app is None:
return None
return relation.data[relation.app].get("ca_certificate")
def get_mount(self, relation: ops.Relation) -> Optional[str]:
"""Return the mount from the relation."""
if relation.app is None:
return None
return relation.data[relation.app].get("mount")
def get_unit_credentials(self, relation: ops.Relation) -> Optional[str]:
"""Return the unit credentials from the relation.
Unit credentials are stored in the relation data as a Juju secret id.
"""
nonce = relation.data[self.charm.unit].get("nonce")
if nonce is None or relation.app is None:
return None
return json.loads(relation.data[relation.app].get("credentials", "{}")).get(nonce)

64
metadata.yaml
View File

@@ -1,64 +0,0 @@
name: barbican-k8s
display-name: Barbican
summary: Openstack Key Manager service
description: |
Barbican is the OpenStack Key Manager service.
It provides secure storage, provisioning and management of secret data.
This includes keying material such as Symmetric Keys, Asymmetric Keys, Certificates and raw binary data.
maintainer: Openstack Charmers <openstack-charmers@lists.ubuntu.com>
source: https://opendev.org/openstack/charm-barbican-k8s
issues: https://bugs.launchpad.net/charm-barbican-k8s
bases:
- name: ubuntu
channel: 22.04/stable
assumes:
- k8s-api
- juju >= 3.1
tags:
- openstack
- secrets
- misc
requires:
ingress-internal:
interface: ingress
limit: 1
optional: true
ingress-public:
interface: ingress
limit: 1
database:
interface: mysql_client
limit: 1
identity-service:
interface: keystone
identity-ops:
interface: keystone-resources
optional: true
amqp:
interface: rabbitmq
vault-kv:
interface: vault-kv
limit: 1
peers:
peers:
interface: barbican-peer
containers:
barbican-api:
resource: barbican-api-image
barbican-worker:
resource: barbican-worker-image
resources:
barbican-api-image:
type: oci-image
description: OCI image for OpenStack Barbican API
upstream-source: ghcr.io/canonical/barbican-consolidated:2023.2
barbican-worker-image:
type: oci-image
description: OCI image for OpenStack Barbican worker
upstream-source: ghcr.io/canonical/barbican-consolidated:2023.2

10
osci.yaml
View File

@@ -1,10 +0,0 @@
- project:
templates:
- charm-publish-jobs
vars:
needs_charm_build: true
charm_build_name: barbican-k8s
build_type: charmcraft
publish_charm: true
charmcraft_channel: 2.0/stable
publish_channel: 2023.2/edge

39
pyproject.toml
View File

@@ -1,39 +0,0 @@
# Copyright 2022 Canonical Ltd.
# See LICENSE file for licensing details.
# Testing tools configuration
[tool.coverage.run]
branch = true
[tool.coverage.report]
show_missing = true
[tool.pytest.ini_options]
minversion = "6.0"
log_cli_level = "INFO"
# Formatting tools configuration
[tool.black]
line-length = 79
[tool.isort]
profile = "black"
multi_line_output = 3
force_grid_wrap = true
# Linting tools configuration
[tool.flake8]
max-line-length = 79
max-doc-length = 99
max-complexity = 10
exclude = [".git", "__pycache__", ".tox", "build", "dist", "*.egg_info", "venv"]
select = ["E", "W", "F", "C", "N", "R", "D", "H"]
# Ignore W503, E501 because using black creates errors with this
# Ignore D107 Missing docstring in __init__
ignore = ["W503", "E501", "D107", "E402"]
per-file-ignores = []
docstring-convention = "google"
# Check for properly formatted copyright header in each file
copyright-check = "True"
copyright-author = "Canonical Ltd."
copyright-regexp = "Copyright\\s\\d{4}([-,]\\d{4})*\\s+%(author)s"

13
rename.sh
View File

@@ -1,13 +0,0 @@
#!/bin/bash
charm=$(grep "charm_build_name" osci.yaml | awk '{print $2}')
echo "renaming ${charm}_*.charm to ${charm}.charm"
echo -n "pwd: "
pwd
ls -al
echo "Removing bad downloaded charm maybe?"
if [[ -e "${charm}.charm" ]];
then
rm "${charm}.charm"
fi
echo "Renaming charm here."
mv ${charm}_*.charm ${charm}.charm

16
requirements.txt
View File

@@ -1,16 +0,0 @@
# This file is managed centrally by release-tools and should not be modified
# within individual charm repos. See the 'global' dir contents for available
# choices of *requirements.txt files for OpenStack Charms:
# https://github.com/openstack-charmers/release-tools
#
cryptography
jinja2
jsonschema
pydantic<2.0
lightkube
lightkube-models
ops
pwgen
pytest-interface-tester
git+https://opendev.org/openstack/charm-ops-sunbeam#egg=ops_sunbeam

494
src/charm.py
View File

@@ -1,494 +0,0 @@
#!/usr/bin/env python3
# Copyright 2023 Canonical Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Barbican Operator Charm.
This charm provide Barbican services as part of an OpenStack deployment
"""
import hashlib
import json
import logging
import secrets
from typing import (
List,
Optional,
)
import charms.keystone_k8s.v0.identity_resource as identity_resource
import ops
import ops.framework
import ops_sunbeam.charm as sunbeam_charm
import ops_sunbeam.config_contexts as sunbeam_ctxts
import ops_sunbeam.container_handlers as sunbeam_chandlers
import ops_sunbeam.core as sunbeam_core
import ops_sunbeam.relation_handlers as sunbeam_rhandlers
from charms.vault_k8s.v0 import (
vault_kv,
)
from ops import (
framework,
model,
pebble,
)
from ops.main import (
main,
)
logger = logging.getLogger(__name__)
BARBICAN_API_CONTAINER = "barbican-api"
BARBICAN_WORKER_CONTAINER = "barbican-worker"
VAULT_KV_RELATION = "vault-kv"
NONCE_SECRET_LABEL = "nonce"
class NoRelationError(Exception):
"""No relation found."""
pass
class WSGIBarbicanAdminConfigContext(sunbeam_ctxts.ConfigContext):
"""Configuration context for WSGI configuration."""
def context(self) -> dict:
"""WSGI configuration options."""
return {
"name": self.charm.service_name,
"public_port": 9312,
"user": self.charm.service_user,
"group": self.charm.service_group,
"wsgi_admin_script": "/usr/bin/barbican-wsgi-api",
"wsgi_public_script": "/usr/bin/barbican-wsgi-api",
"error_log": "/dev/stdout",
"custom_log": "/dev/stdout",
}
class VaultKvRequiresHandler(sunbeam_rhandlers.RelationHandler):
"""Handler for vault-kv relation."""
charm: "BarbicanVaultOperatorCharm"
interface: vault_kv.VaultKvRequires
def __init__(
self,
charm: ops.CharmBase,
relation_name: str,
callback_f,
mount_suffix: str,
mandatory: bool = False,
):
self.mount_suffix = mount_suffix
super().__init__(charm, relation_name, callback_f, mandatory)
def setup_event_handler(self) -> ops.Object:
"""Configure event handlers for a vault-kv relation."""
logger.debug("Setting up vault-kv event handler")
interface = vault_kv.VaultKvRequires(
self.charm,
self.relation_name,
self.mount_suffix,
)
self.framework.observe(interface.on.connected, self._on_connected)
self.framework.observe(interface.on.ready, self._on_ready)
self.framework.observe(interface.on.gone_away, self._on_gone_away)
try:
self.request_credentials(interface, self._relation)
except NoRelationError:
pass
return interface
@property
def _relation(self) -> ops.Relation:
relation = self.model.get_relation(VAULT_KV_RELATION)
if relation is None:
raise NoRelationError("Vault-kv relation not found")
return relation
def _on_connected(self, event: vault_kv.VaultKvConnectedEvent):
"""Handle on connected event."""
relation = self.model.get_relation(
event.relation_name, event.relation_id
)
if relation is None:
raise RuntimeError(
"Vault-kv relation not found during a connected event"
)
self.request_credentials(self.interface, relation)
def _on_ready(self, event: vault_kv.VaultKvReadyEvent):
"""Handle client ready relation."""
self.callback_f(event)
def _on_gone_away(self, event: vault_kv.VaultKvGoneAwayEvent):
"""Handle client gone away relation."""
self.callback_f(event)
def request_credentials(
self, interface: vault_kv.VaultKvRequires, relation: ops.Relation
):
"""Request credentials from vault-kv relation."""
nonce = self.charm.get_nonce()
if nonce is None:
return
binding = self.model.get_binding(relation)
if binding is None:
logger.debug("No binding found for vault-kv relation")
return
egress_subnet = str(binding.network.interfaces[0].subnet)
interface.request_credentials(relation, egress_subnet, nonce)
@property
def ready(self) -> bool:
"""Whether the handler is ready for use."""
relation = self.model.get_relation(VAULT_KV_RELATION)
if relation is None:
return False
return all(
(
self.interface.get_unit_credentials(relation),
self.interface.get_vault_url(relation),
self.interface.get_mount(relation),
)
)
def context(self) -> dict:
"""Context containing relation data."""
vault_kv_relation = self._relation
unit_credentials = self.interface.get_unit_credentials(
vault_kv_relation
)
if not unit_credentials:
return {}
secret = self.model.get_secret(id=unit_credentials)
secret_content = secret.get_content()
return {
"kv_mountpoint": self.interface.get_mount(vault_kv_relation),
"vault_url": self.interface.get_vault_url(vault_kv_relation),
"approle_role_id": secret_content["role-id"],
"approle_secret_id": secret_content["role-secret-id"],
"ca_crt_file": self.charm.ca_crt_file,
"ca_certificate": self.interface.get_ca_certificate(
vault_kv_relation
),
}
class BarbicanWorkerPebbleHandler(sunbeam_chandlers.ServicePebbleHandler):
"""Pebble handler for Barbican worker."""
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.enable_service_check = True
def get_layer(self) -> dict:
"""Barbican worker service layer.
:returns: pebble layer configuration for worker service
:rtype: dict
"""
return {
"summary": "barbican worker layer",
"description": "pebble configuration for barbican worker",
"services": {
"barbican-worker": {
"override": "replace",
"summary": "Barbican Worker",
"command": "barbican-worker",
"user": "barbican",
"group": "barbican",
}
},
}
def default_container_configs(
self,
) -> List[sunbeam_core.ContainerConfigFile]:
"""Container configurations for handler."""
return [
sunbeam_core.ContainerConfigFile(
"/etc/barbican/barbican.conf", "barbican", "barbican"
)
]
@property
def service_ready(self) -> bool:
"""Determine whether the service the container provides is running."""
if self.enable_service_check:
logging.debug("Service checks enabled for barbican worker")
return super().service_ready
else:
logging.debug("Service checks disabled for barbican worker")
return self.pebble_ready
class BarbicanOperatorCharm(sunbeam_charm.OSBaseOperatorAPICharm):
"""Charm the service."""
_state = framework.StoredState()
service_name = "barbican-api"
wsgi_admin_script = "/usr/bin/barbican-wsgi-api"
wsgi_public_script = "/usr/bin/barbican-wsgi-api"
mandatory_relations = {
"database",
"amqp",
"identity-service",
"ingress-public",
}
db_sync_cmds = [
["sudo", "-u", "barbican", "barbican-manage", "db", "upgrade"]
]
def configure_unit(self, event: framework.EventBase) -> None:
"""Run configuration on this unit."""
self.disable_barbican_config()
super().configure_unit(event)
def get_relation_handlers(
self,
handlers: Optional[List[sunbeam_rhandlers.RelationHandler]] = None,
) -> List[sunbeam_rhandlers.RelationHandler]:
"""Relation handlers for the service."""
handlers = super().get_relation_handlers(handlers)
self.id_ops = sunbeam_rhandlers.IdentityResourceRequiresHandler(
self,
"identity-ops",
self.handle_keystone_ops,
mandatory="identity-ops" in self.mandatory_relations,
)
handlers.append(self.id_ops)
return handlers
def handle_keystone_ops(self, event: ops.EventBase) -> None:
"""Event handler for identity ops."""
if isinstance(event, identity_resource.IdentityOpsProviderReadyEvent):
self._state.identity_ops_ready = True
if not self.unit.is_leader():
return
# Send op request only by leader unit
ops = self._get_barbican_role_ops()
id_ = self.hash_ops(ops)
request = {
"id": id_,
"tag": "barbican_roles_setup",
"ops": ops,
}
logger.debug("Sending ops request: %r", request)
self.id_ops.interface.request_ops(request)
elif isinstance(
event,
identity_resource.IdentityOpsProviderGoneAwayEvent,
):
self._state.identity_ops_ready = False
elif isinstance(event, identity_resource.IdentityOpsResponseEvent):
if not self.unit.is_leader():
return
response = self.id_ops.interface.response
logger.debug("Got response from keystone: %r", response)
request_tag = response.get("tag")
if request_tag == "barbican_roles_setup":
self._handle_barbican_roles_setup(event)
def _handle_barbican_roles_setup(
self,
event: ops.EventBase,
) -> None:
"""Handle roles setup response from identity-ops."""
if {
op.get("return-code")
for op in self.id_ops.interface.response.get(
"ops",
[],
)
} != {0}:
logger.error("Failed to setup barbican roles")
def hash_ops(self, ops: list) -> str:
"""Return the sha1 of the requested ops."""
return hashlib.sha1(json.dumps(ops).encode()).hexdigest()
def _get_barbican_role_ops(self) -> list:
"""Generate ops request for domain setup."""
roles = ["key-manager:service-admin", "creator", "observer", "audit"]
ops = [
{"name": "create_role", "params": {"name": name}} for name in roles
]
return ops
@property
def config_contexts(self) -> List[sunbeam_ctxts.ConfigContext]:
"""Generate list of configuration adapters for the charm."""
_cadapters = super().config_contexts
_cadapters.extend(
[
WSGIBarbicanAdminConfigContext(
self,
"wsgi_barbican_admin",
)
]
)
return _cadapters
def disable_barbican_config(self):
"""Disable default barbican config."""
container = self.unit.get_container(BARBICAN_API_CONTAINER)
try:
process = container.exec(
["a2disconf", "barbican-api"], timeout=5 * 60
)
out, warnings = process.wait_output()
if warnings:
for line in warnings.splitlines():
logger.warning("a2disconf warn: %s", line.strip())
logging.debug(f"Output from a2disconf: \n{out}")
except pebble.ExecError:
logger.exception("Failed to disable barbican-api conf in apache")
self.status = model.ErrorStatus(
"Failed to disable barbican-api conf in apache"
)
def get_pebble_handlers(
self,
) -> List[sunbeam_chandlers.ServicePebbleHandler]:
"""Pebble handlers for operator."""
pebble_handlers = super().get_pebble_handlers()
pebble_handlers.extend(
[
BarbicanWorkerPebbleHandler(
self,
BARBICAN_WORKER_CONTAINER,
"barbican-worker",
[],
self.template_dir,
self.configure_charm,
),
]
)
return pebble_handlers
@property
def service_conf(self) -> str:
"""Service default configuration file."""
return "/etc/barbican/barbican.conf"
@property
def service_user(self) -> str:
"""Service user file and directory ownership."""
return "barbican"
@property
def service_group(self) -> str:
"""Service group file and directory ownership."""
return "barbican"
@property
def service_endpoints(self):
"""Service endpoints configuration."""
return [
{
"service_name": "barbican",
"type": "key-manager",
"description": "OpenStack Barbican API",
"internal_url": f"{self.internal_url}",
"public_url": f"{self.public_url}",
"admin_url": f"{self.admin_url}",
}
]
@property
def default_public_ingress_port(self):
"""Default port."""
return 9311
@property
def healthcheck_http_url(self) -> str:
"""Healthcheck HTTP URL for the service."""
# / returns a 300 return code, which is not understood by Pebble as OK
return super().healthcheck_http_url + "?build"
class BarbicanVaultOperatorCharm(BarbicanOperatorCharm):
"""Vault specialized Barbican Operator Charm."""
mandatory_relations = BarbicanOperatorCharm.mandatory_relations.union(
{VAULT_KV_RELATION}
)
def __init__(self, *args):
super().__init__(*args)
self.framework.observe(self.on.install, self._on_install)
def _on_install(self, event: ops.framework.EventBase) -> None:
"""Handle install event."""
self.unit.add_secret(
{"nonce": secrets.token_hex(16)},
label=NONCE_SECRET_LABEL,
description="nonce for vault-kv relation",
)
def get_relation_handlers(
self,
handlers: Optional[List[sunbeam_rhandlers.RelationHandler]] = None,
) -> List[sunbeam_rhandlers.RelationHandler]:
"""Relation handlers for the service."""
handlers = super().get_relation_handlers(handlers)
if self.can_add_handler(VAULT_KV_RELATION, handlers):
self.vault_kv = VaultKvRequiresHandler(
self,
VAULT_KV_RELATION,
self.configure_charm,
self.mount_suffix,
VAULT_KV_RELATION in self.mandatory_relations,
)
handlers.append(self.vault_kv)
return handlers
@property
def container_configs(self) -> List[sunbeam_core.ContainerConfigFile]:
"""Container configuration files for the service."""
_cconfigs = super().container_configs
_cconfigs.append(
sunbeam_core.ContainerConfigFile(
self.ca_crt_file, "barbican", "barbican"
)
)
return _cconfigs
@property
def mount_suffix(self):
"""Secret backend for vault."""
return "secrets"
@property
def ca_crt_file(self):
"""Vault CA certificate file location."""
return "/etc/barbican/vault_ca.crt"
def get_nonce(self) -> Optional[str]:
"""Return nonce stored in secret."""
try:
secret = self.model.get_secret(label=NONCE_SECRET_LABEL)
return secret.get_content()["nonce"]
except ops.SecretNotFoundError:
return None
if __name__ == "__main__":
main(BarbicanVaultOperatorCharm)

40
src/templates/barbican.conf
View File

@@ -1,40 +0,0 @@
[DEFAULT]
debug = {{ options.debug }}
lock_path = /var/lock/barbican
state_path = /var/lib/barbican
host_href = ""
transport_url = {{ amqp.transport_url }}
sql_connection = {{ database.connection }}
db_auto_create = false
{% include "parts/section-identity" %}
{% include "parts/section-service-user" %}
[secretstore]
{% if vault_kv and vault_kv.approle_role_id -%}
enabled_secretstore_plugins = vault_plugin
{% else -%}
enabled_secretstore_plugins = store_crypto
{% endif -%}
[crypto]
enabled_crypto_plugins = simple_crypto
[simple_crypto_plugin]
# the kek should be a 32-byte value which is base64 encoded
kek = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXoxMjM0NTY='
{% if vault_kv and vault_kv.approle_secret_id -%}
[vault_plugin]
approle_role_id = {{ vault_kv.approle_role_id }}
approle_secret_id = {{ vault_kv.approle_secret_id }}
kv_mountpoint = {{ vault_kv.kv_mountpoint }}
vault_url = {{ vault_kv.vault_url }}
use_ssl = True
ssl_ca_crt_file = {{ vault_kv.ca_crt_file }}
{% endif -%}
{% include "parts/section-oslo-messaging-rabbit" %}

27
src/templates/parts/section-identity
View File

@@ -1,27 +0,0 @@
[keystone_authtoken]
{% if identity_service.admin_auth_url -%}
auth_url = {{ identity_service.admin_auth_url }}
interface = admin
{% elif identity_service.internal_auth_url -%}
auth_url = {{ identity_service.internal_auth_url }}
interface = internal
{% elif identity_service.internal_host -%}
auth_url = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
interface = internal
{% endif -%}
{% if identity_service.public_auth_url -%}
www_authenticate_uri = {{ identity_service.public_auth_url }}
{% elif identity_service.internal_host -%}
www_authenticate_uri = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
{% endif -%}
auth_type = password
project_domain_name = {{ identity_service.service_domain_name }}
user_domain_name = {{ identity_service.service_domain_name }}
project_name = {{ identity_service.service_project_name }}
username = {{ identity_service.service_user_name }}
password = {{ identity_service.service_password }}
service_token_roles = {{ identity_service.admin_role }}
service_token_roles_required = True
# XXX Region should come from the id relation here
region_name = {{ options.region }}

2
src/templates/parts/section-oslo-messaging-rabbit
View File

@@ -1,2 +0,0 @@
[oslo_messaging_rabbit]
rabbit_quorum_queue = True

17
src/templates/parts/section-service-user
View File

@@ -1,17 +0,0 @@
{% if identity_service.service_domain_id -%}
[service_user]
{% if identity_service.admin_auth_url -%}
auth_url = {{ identity_service.admin_auth_url }}
{% elif identity_service.internal_auth_url -%}
auth_url = {{ identity_service.internal_auth_url }}
{% elif identity_service.internal_host -%}
auth_url = {{ identity_service.internal_protocol }}://{{ identity_service.internal_host }}:{{ identity_service.internal_port }}
{% endif -%}
send_service_user_token = true
auth_type = password
project_domain_id = {{ identity_service.service_domain_id }}
user_domain_id = {{ identity_service.service_domain_id }}
project_name = {{ identity_service.service_project_name }}
username = {{ identity_service.service_user_name }}
password = {{ identity_service.service_password }}
{% endif -%}

3
src/templates/vault_ca.crt.j2
View File

@@ -1,3 +0,0 @@
{% if vault_kv is defined and vault_kv.ca_certificate -%}
{{ vault_kv.ca_certificate }}
{% endif -%}

51
src/templates/wsgi-barbican-api.conf
View File

@@ -1,51 +0,0 @@
Listen {{ wsgi_config.public_port }}
Listen {{ wsgi_barbican_admin.public_port }}
<VirtualHost *:{{ wsgi_config.public_port }}>
WSGIDaemonProcess barbican-api processes=4 threads=1 user={{ wsgi_config.user }} group={{ wsgi_config.group }} \
display-name=%{GROUP}
WSGIProcessGroup barbican-api
{% if ingress_public and ingress_public.ingress_path -%}
WSGIScriptAlias {{ ingress_public.ingress_path }} {{ wsgi_config.wsgi_public_script }}
{% endif -%}
WSGIScriptAlias / {{ wsgi_config.wsgi_public_script }}
WSGIApplicationGroup %{GLOBAL}
WSGIPassAuthorization On
<IfVersion >= 2.4>
ErrorLogFormat "%{cu}t %M"
</IfVersion>
ErrorLog {{ wsgi_config.error_log }}
CustomLog {{ wsgi_config.custom_log }} combined
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>
</VirtualHost>
<VirtualHost *:{{ wsgi_barbican_admin.public_port }}>
WSGIDaemonProcess barbican-admin-api processes=4 threads=1 user={{ wsgi_barbican_admin.user }} group={{ wsgi_barbican_admin.group }} \
display-name=%{GROUP}
WSGIProcessGroup barbican-admin-api
WSGIScriptAlias / {{ wsgi_barbican_admin.wsgi_public_script }}
WSGIApplicationGroup %{GLOBAL}
WSGIPassAuthorization On
<IfVersion >= 2.4>
ErrorLogFormat "%{cu}t %M"
</IfVersion>
ErrorLog {{ wsgi_barbican_admin.error_log }}
CustomLog {{ wsgi_barbican_admin.custom_log }} combined
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>
</VirtualHost>

14
test-requirements.txt
View File

@@ -1,14 +0,0 @@
# This file is managed centrally by release-tools and should not be modified
# within individual charm repos. See the 'global' dir contents for available
# choices of *requirements.txt files for OpenStack Charms:
# https://github.com/openstack-charmers/release-tools
#
coverage
mock
flake8
stestr
git+https://github.com/openstack-charmers/zaza.git@libjuju-3.1#egg=zaza
git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack
git+https://opendev.org/openstack/tempest.git#egg=tempest
ops

75
tests/bundles/smoke.yaml
View File

@@ -1,75 +0,0 @@
bundle: kubernetes
applications:
mysql:
charm: ch:mysql-k8s
channel: 8.0/stable
scale: 1
trust: true
# Currently traefik is required for networking things.
# If this isn't present, the units will hang at "installing agent".
traefik:
charm: ch:traefik-k8s
channel: 1.0/candidate
scale: 1
trust: true
options:
kubernetes-service-annotations: metallb.universe.tf/address-pool=public
# required for barbican
rabbitmq:
charm: ch:rabbitmq-k8s
channel: 3.12/edge
scale: 1
trust: true
options:
minimum-replicas: 1
keystone:
charm: ch:keystone-k8s
channel: 2023.2/edge
scale: 1
trust: false
options:
admin-role: admin
storage:
fernet-keys: 5M
credential-keys: 5M
vault:
charm: ch:vault-k8s
channel: latest/edge
scale: 1
trust: false
barbican:
charm: ../../barbican-k8s.charm
scale: 1
trust: false
resources:
barbican-api-image: ghcr.io/canonical/barbican-consolidated:2023.2
barbican-worker-image: ghcr.io/canonical/barbican-consolidated:2023.2
relations:
- - traefik:ingress
- keystone:ingress-internal
- - traefik:ingress
- keystone:ingress-public
- - mysql:database
- keystone:database
- - mysql:database
- barbican:database
- - rabbitmq:amqp
- barbican:amqp
- - keystone:identity-service
- barbican:identity-service
- - keystone:identity-ops
- barbican:identity-ops
- - traefik:ingress
- barbican:ingress-internal
- - traefik:ingress
- barbican:ingress-public
- - vault:vault-kv
- barbican:vault-kv

1
tests/config.yaml
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@@ -1 +0,0 @@
../config.yaml

38
tests/tests.yaml
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@@ -1,38 +0,0 @@
gate_bundles:
- smoke
smoke_bundles:
- smoke
# There is no storage provider at the moment so cannot run tests.
configure:
- zaza.charm_tests.noop.setup.basic_setup
tests:
- zaza.openstack.charm_tests.barbican.tests.BarbicanTempestTestK8S
tests_options:
trust:
- smoke
ignore_hard_deploy_errors:
- smoke
tempest:
default:
smoke: True
target_deploy_status:
traefik:
workload-status: active
workload-status-message-regex: '^$'
rabbitmq:
workload-status: active
workload-status-message-regex: '^$'
keystone:
workload-status: active
workload-status-message-regex: '^$'
mysql:
workload-status: active
workload-status-message-regex: '^.*$'
barbican:
workload-status: active
workload-status-message-regex: '^$'
vault:
workload-status: active
workload-status-message-regex: '^$'

15
tests/unit/__init__.py
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@@ -1,15 +0,0 @@
# Copyright 2023 Canonical Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Unit tests for Barbican operator."""

111
tests/unit/test_barbican_charm.py
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@@ -1,111 +0,0 @@
#!/usr/bin/env python3
# Copyright 2023 Canonical Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Unit tests for Barbican operator."""
import ops_sunbeam.test_utils as test_utils
import charm
class _BarbicanTestOperatorCharm(charm.BarbicanOperatorCharm):
"""Test Operator Charm for Barbican Operator."""
def __init__(self, framework):
self.seen_events = []
super().__init__(framework)
def _log_event(self, event):
self.seen_events.append(type(event).__name__)
def configure_charm(self, event):
super().configure_charm(event)
self._log_event(event)
@property
def public_ingress_address(self):
return "barbican.juju"
class TestBarbicanOperatorCharm(test_utils.CharmTestCase):
"""Unit tests for Barbican Operator."""
PATCHES = []
def setUp(self):
"""Set up environment for unit test."""
super().setUp(charm, self.PATCHES)
self.harness = test_utils.get_harness(
_BarbicanTestOperatorCharm, container_calls=self.container_calls
)
# clean up events that were dynamically defined,
# otherwise we get issues because they'll be redefined,
# which is not allowed.
from charms.data_platform_libs.v0.database_requires import (
DatabaseEvents,
)
for attr in (
"database_database_created",
"database_endpoints_changed",
"database_read_only_endpoints_changed",
):
try:
delattr(DatabaseEvents, attr)
except AttributeError:
pass
self.addCleanup(self.harness.cleanup)
self.harness.begin()
def test_pebble_ready_handler(self):
"""Test pebble ready handler."""
self.assertEqual(self.harness.charm.seen_events, [])
test_utils.set_all_pebbles_ready(self.harness)
self.assertEqual(len(self.harness.charm.seen_events), 2)
def test_all_relations(self):
"""Test all integrations for operator."""
self.harness.set_leader()
test_utils.set_all_pebbles_ready(self.harness)
# this adds all the default/common relations
test_utils.add_all_relations(self.harness)
test_utils.add_complete_ingress_relation(self.harness)
setup_cmds = [
["a2ensite", "wsgi-barbican-api"],
["sudo", "-u", "barbican", "barbican-manage", "db", "upgrade"],
]
for cmd in setup_cmds:
self.assertIn(cmd, self.container_calls.execute["barbican-api"])
config_files = [
"/etc/apache2/sites-available/wsgi-barbican-api.conf",
"/etc/barbican/barbican.conf",
]
for f in config_files:
self.check_file("barbican-api", f)
def add_db_relation(harness, name) -> str:
"""Add db relation."""
rel_id = harness.add_relation(name, "mysql")
harness.add_relation_unit(rel_id, "mysql/0")
harness.add_relation_unit(rel_id, "mysql/0")
harness.update_relation_data(
rel_id, "mysql/0", {"ingress-address": "10.0.0.3"}
)
return rel_id

169
tox.ini
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@@ -1,169 +0,0 @@
# Source charm: ./tox.ini
# This file is managed centrally by release-tools and should not be modified
# within individual charm repos. See the 'global' dir contents for available
# choices of tox.ini for OpenStack Charms:
# https://github.com/openstack-charmers/release-tools
[tox]
skipsdist = True
envlist = pep8,py3
sitepackages = False
skip_missing_interpreters = False
minversion = 3.18.0
[vars]
src_path = {toxinidir}/src/
tst_path = {toxinidir}/tests/
lib_path = {toxinidir}/lib/
pyproject_toml = {toxinidir}/pyproject.toml
all_path = {[vars]src_path} {[vars]tst_path}
[testenv]
basepython = python3
setenv =
PYTHONPATH = {toxinidir}:{[vars]lib_path}:{[vars]src_path}
passenv =
HOME
PYTHONPATH
install_command =
pip install {opts} {packages}
commands = stestr run --slowest {posargs}
allowlist_externals =
git
charmcraft
{toxinidir}/fetch-libs.sh
{toxinidir}/rename.sh
deps =
-r{toxinidir}/test-requirements.txt
[testenv:fmt]
description = Apply coding style standards to code
deps =
black
isort
commands =
isort {[vars]all_path} --skip-glob {[vars]lib_path} --skip {toxinidir}/.tox
black --config {[vars]pyproject_toml} {[vars]all_path} --exclude {[vars]lib_path}
[testenv:build]
basepython = python3
deps =
commands =
charmcraft -v pack
{toxinidir}/rename.sh
[testenv:fetch]
basepython = python3
deps =
commands =
{toxinidir}/fetch-libs.sh
[testenv:py3]
basepython = python3
deps =
{[testenv]deps}
-r{toxinidir}/requirements.txt
[testenv:py38]
basepython = python3.8
deps = {[testenv:py3]deps}
[testenv:py39]
basepython = python3.9
deps = {[testenv:py3]deps}
[testenv:py310]
basepython = python3.10
deps = {[testenv:py3]deps}
[testenv:py311]
basepython = python3.11
deps = {[testenv:py3]deps}
[testenv:cover]
basepython = python3
deps = {[testenv:py3]deps}
setenv =
{[testenv]setenv}
PYTHON=coverage run
commands =
coverage erase
stestr run --slowest {posargs}
coverage combine
coverage html -d cover
coverage xml -o cover/coverage.xml
coverage report
[testenv:pep8]
description = Alias for lint
deps = {[testenv:lint]deps}
commands = {[testenv:lint]commands}
[testenv:lint]
description = Check code against coding style standards
deps =
black
flake8<6 # Pin version until https://github.com/savoirfairelinux/flake8-copyright/issues/19 is merged
flake8-docstrings
flake8-copyright
flake8-builtins
pyproject-flake8
pep8-naming
isort
codespell
commands =
codespell {[vars]all_path}
# pflake8 wrapper supports config from pyproject.toml
pflake8 --exclude {[vars]lib_path} --config {toxinidir}/pyproject.toml {[vars]all_path}
isort --check-only --diff {[vars]all_path} --skip-glob {[vars]lib_path}
black --config {[vars]pyproject_toml} --check --diff {[vars]all_path} --exclude {[vars]lib_path}
[testenv:func-noop]
basepython = python3
deps =
git+https://github.com/openstack-charmers/zaza.git@libjuju-3.1#egg=zaza
git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack
git+https://opendev.org/openstack/tempest.git#egg=tempest
commands =
functest-run-suite --help
[testenv:func]
basepython = python3
deps = {[testenv:func-noop]deps}
commands =
functest-run-suite --keep-model
[testenv:func-smoke]
basepython = python3
deps = {[testenv:func-noop]deps}
setenv =
TEST_MODEL_SETTINGS = automatically-retry-hooks=true
TEST_MAX_RESOLVE_COUNT = 5
commands =
functest-run-suite --keep-model --smoke
[testenv:func-dev]
basepython = python3
deps = {[testenv:func-noop]deps}
commands =
functest-run-suite --keep-model --dev
[testenv:func-target]
basepython = python3
deps = {[testenv:func-noop]deps}
commands =
functest-run-suite --keep-model --bundle {posargs}
[coverage:run]
branch = True
concurrency = multiprocessing
parallel = True
source =
.
omit =
.tox/*
tests/*
src/templates/*
[flake8]
ignore=E226,W504