charm-ceph-radosgw/actions/actions.py
James Page 7722f9d620 Add support for RADOS gateway multi-site replication
Add new radosgw-multisite typed master and slave relations to
support configuration of separate ceph-radosgw deployments as
a single realm and zonegroup to support replication of data
between distinct RADOS gateway deployments.

This mandates the use of the realm, zonegroup and zone
configuration options of which realm and zonegroup must match
between instances of the ceph-radosgw application participating
in the master/slave relation.

The radosgw-multisite relation may be deployed as a model local
relation or as a cross-model relation.

Change-Id: I094f89b0f668e012482ca8aace1756c911b79d17
Closes-Bug: 1666880
2019-02-14 09:40:20 +00:00

152 lines
4.1 KiB
Python
Executable File

#!/usr/bin/env python3
#
# Copyright 2016 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.
import os
import subprocess
import sys
sys.path.append('hooks/')
import multisite
from charmhelpers.core.hookenv import (
action_fail,
config,
action_set,
)
from utils import (
pause_unit_helper,
resume_unit_helper,
register_configs,
)
def pause(args):
"""Pause the Ceilometer services.
@raises Exception should the service fail to stop.
"""
pause_unit_helper(register_configs())
def resume(args):
"""Resume the Ceilometer services.
@raises Exception should the service fail to start."""
resume_unit_helper(register_configs())
def promote(args):
"""Promote zone associated with local RGW units to master/default"""
zone = config('zone')
if not zone:
action_fail('No zone configuration set, not promoting')
return
try:
multisite.modify_zone(zone,
default=True, master=True)
multisite.update_period()
action_set(
values={'message': 'zone:{} promoted to '
'master/default'.format(zone)}
)
except subprocess.CalledProcessError as cpe:
action_fail('Unable to promote zone:{} '
'to master: {}'.format(zone, cpe.output))
def readonly(args):
"""Mark zone associated with local RGW units as read only"""
zone = config('zone')
if not zone:
action_fail('No zone configuration set, not marking read only')
return
try:
multisite.modify_zone(zone, readonly=True)
multisite.update_period()
action_set(
values={
'message': 'zone:{} marked as read only'.format(zone)
}
)
except subprocess.CalledProcessError as cpe:
action_fail('Unable mark zone:{} '
'as read only: {}'.format(zone, cpe.output))
def readwrite(args):
"""Mark zone associated with local RGW units as read write"""
zone = config('zone')
if not zone:
action_fail('No zone configuration set, not marking read write')
return
try:
multisite.modify_zone(zone, readonly=False)
multisite.update_period()
action_set(
values={
'message': 'zone:{} marked as read write'.format(zone)
}
)
except subprocess.CalledProcessError as cpe:
action_fail('Unable mark zone:{} '
'as read write: {}'.format(zone, cpe.output))
def tidydefaults(args):
"""Delete default zone and zonegroup metadata"""
zone = config('zone')
if not zone:
action_fail('No zone configuration set, not deleting defaults')
return
try:
multisite.tidy_defaults()
action_set(
values={
'message': 'default zone and zonegroup deleted'
}
)
except subprocess.CalledProcessError as cpe:
action_fail('Unable delete default zone and zonegroup'
': {}'.format(zone, cpe.output))
# A dictionary of all the defined actions to callables (which take
# parsed arguments).
ACTIONS = {
"pause": pause,
"resume": resume,
"promote": promote,
"readonly": readonly,
"readwrite": readwrite,
"tidydefaults": tidydefaults,
}
def main(args):
action_name = os.path.basename(args[0])
try:
action = ACTIONS[action_name]
except KeyError:
return "Action %s undefined" % action_name
else:
try:
action(args)
except Exception as e:
action_fail(str(e))
if __name__ == "__main__":
sys.exit(main(sys.argv))