vexxhost/openstack-operator
Code Issues Proposed changes

Added base for KOPF operator, switching Memcache

Browse Source 
Change-Id: I6fdd8c69c35480f3844787eb4d5275174be027ee
This commit is contained in:
Mohammed Naser 2020-04-15 23:21:27 -04:00
parent 4bc7e15782
commit f026321abb
21 changed files with 540 additions and 464 deletions
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2
.gitignore vendored
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@ -25,3 +25,5 @@ bin
doc/build
.tox
__pycache__
*.egg*

57
api/v1alpha1/memcached_types.go
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@ -1,57 +0,0 @@
// Copyright 2020 VEXXHOST, Inc.
//
// 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.
package v1alpha1
import (
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// MemcachedSpec defines the desired state of Memcached
type MemcachedSpec struct {
// +kubebuilder:validation:Required
// +kubebuilder:validation:Default=64
Megabytes int `json:"megabytes"`
NodeSelector map[string]string `json:"nodeSelector,omitempty"`
Tolerations []v1.Toleration `json:"tolerations,omitempty"`
}
// MemcachedStatus defines the observed state of Memcached
type MemcachedStatus struct {
}
// +kubebuilder:object:root=true
// Memcached is the Schema for the memcacheds API
type Memcached struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata,omitempty"`
Spec MemcachedSpec `json:"spec,omitempty"`
Status MemcachedStatus `json:"status,omitempty"`
}
// +kubebuilder:object:root=true
// MemcachedList contains a list of Memcached
type MemcachedList struct {
metav1.TypeMeta `json:",inline"`
metav1.ListMeta `json:"metadata,omitempty"`
Items []Memcached `json:"items"`
}
func init() {
SchemeBuilder.Register(&Memcached{}, &MemcachedList{})
}

103
api/v1alpha1/zz_generated.deepcopy.go
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@ -153,109 +153,6 @@ func (in *McrouterStatus) DeepCopy() *McrouterStatus {
return out
}
// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
func (in *Memcached) DeepCopyInto(out *Memcached) {
*out = *in
out.TypeMeta = in.TypeMeta
in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
in.Spec.DeepCopyInto(&out.Spec)
out.Status = in.Status
}
// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Memcached.
func (in *Memcached) DeepCopy() *Memcached {
if in == nil {
return nil
}
out := new(Memcached)
in.DeepCopyInto(out)
return out
}
// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
func (in *Memcached) DeepCopyObject() runtime.Object {
if c := in.DeepCopy(); c != nil {
return c
}
return nil
}
// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
func (in *MemcachedList) DeepCopyInto(out *MemcachedList) {
*out = *in
out.TypeMeta = in.TypeMeta
in.ListMeta.DeepCopyInto(&out.ListMeta)
if in.Items != nil {
in, out := &in.Items, &out.Items
*out = make([]Memcached, len(*in))
for i := range *in {
(*in)[i].DeepCopyInto(&(*out)[i])
}
}
}
// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MemcachedList.
func (in *MemcachedList) DeepCopy() *MemcachedList {
if in == nil {
return nil
}
out := new(MemcachedList)
in.DeepCopyInto(out)
return out
}
// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
func (in *MemcachedList) DeepCopyObject() runtime.Object {
if c := in.DeepCopy(); c != nil {
return c
}
return nil
}
// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
func (in *MemcachedSpec) DeepCopyInto(out *MemcachedSpec) {
*out = *in
if in.NodeSelector != nil {
in, out := &in.NodeSelector, &out.NodeSelector
*out = make(map[string]string, len(*in))
for key, val := range *in {
(*out)[key] = val
}
}
if in.Tolerations != nil {
in, out := &in.Tolerations, &out.Tolerations
*out = make([]v1.Toleration, len(*in))
for i := range *in {
(*in)[i].DeepCopyInto(&(*out)[i])
}
}
}
// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MemcachedSpec.
func (in *MemcachedSpec) DeepCopy() *MemcachedSpec {
if in == nil {
return nil
}
out := new(MemcachedSpec)
in.DeepCopyInto(out)
return out
}
// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
func (in *MemcachedStatus) DeepCopyInto(out *MemcachedStatus) {
*out = *in
}
// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MemcachedStatus.
func (in *MemcachedStatus) DeepCopy() *MemcachedStatus {
if in == nil {
return nil
}
out := new(MemcachedStatus)
in.DeepCopyInto(out)
return out
}
// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
func (in *Rabbitmq) DeepCopyInto(out *Rabbitmq) {
*out = *in

17
chart/templates/deployment.yaml
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@ -20,6 +20,21 @@ spec:
containers:
- name: operator
image: vexxhost/openstack-operator:latest
command: ["/usr/local/bin/kopf"]
args:
- run
- -m
- openstack_operator.memcached
resources:
limits:
cpu: 100m
memory: 30Mi
requests:
cpu: 100m
memory: 20Mi
- name: go-operator
image: vexxhost/openstack-operator:latest
command: ["/manager"]
args:
- --enable-leader-election
resources:
@ -36,4 +51,4 @@ spec:
{{- with .Values.nodeSelector }}
nodeSelector:
{{ toYaml . | indent 8 }}
{{- end }}
{{- end }}

279
controllers/memcached_controller.go
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@ -1,279 +0,0 @@
// Copyright 2020 VEXXHOST, Inc.
//
// 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.
package controllers
import (
"context"
"fmt"
"sort"
"strconv"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
infrastructurev1alpha1 "opendev.org/vexxhost/openstack-operator/api/v1alpha1"
monitoringv1 "opendev.org/vexxhost/openstack-operator/api/monitoring/v1"
"opendev.org/vexxhost/openstack-operator/builders"
"opendev.org/vexxhost/openstack-operator/utils/baseutils"
"opendev.org/vexxhost/openstack-operator/utils/k8sutils"
)
// MemcachedReconciler reconciles a Memcached object
type MemcachedReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
}
// +kubebuilder:rbac:groups=infrastructure.vexxhost.cloud,resources=memcacheds,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=infrastructure.vexxhost.cloud,resources=memcacheds/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=prometheusrules,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=podmonitors,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=pods,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;patch;delete
// Reconcile does the reconcilication of Memcached instances
func (r *MemcachedReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
ctx := context.Background()
log := r.Log.WithValues("memcached", req.NamespacedName)
var memcached infrastructurev1alpha1.Memcached
if err := r.Get(ctx, req.NamespacedName, &memcached); err != nil {
return ctrl.Result{}, client.IgnoreNotFound(err)
}
// Labels
typeLabels := baseutils.MergeMapsWithoutOverwrite(map[string]string{
"app.kubernetes.io/name": "memcached",
"app.kubernetes.io/managed-by": "openstack-operator",
}, memcached.Labels)
labels := map[string]string{
"app.kubernetes.io/name": "memcached",
"app.kubernetes.io/managed-by": "openstack-operator",
"app.kubernetes.io/instance": req.Name,
}
mcrouterLabels := baseutils.MergeMapsWithoutOverwrite(map[string]string{
"app.kubernetes.io/name": "memcached",
"app.kubernetes.io/managed-by": "openstack-operator",
"app.kubernetes.io/instance": req.Name,
}, memcached.Labels)
// Deployment
if res, err := r.ReconcileDeployment(ctx, req, &memcached, log, labels); err != nil || res != (ctrl.Result{}) {
return res, err
}
// PodMonitor
if res, err := r.ReconcilePodMonitor(ctx, req, &memcached, log, typeLabels); err != nil || res != (ctrl.Result{}) {
return res, err
}
// Alertrule
if res, err := r.ReconcilePrometheusRule(ctx, req, &memcached, log, typeLabels); err != nil || res != (ctrl.Result{}) {
return res, err
}
// Mcrouter
if res, err := r.ReconcileMcrouter(ctx, req, &memcached, log, labels, mcrouterLabels); err != nil || res != (ctrl.Result{}) {
return res, err
}
return ctrl.Result{}, nil
}
// SetupWithManager initializes the controller with primary manager
func (r *MemcachedReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&infrastructurev1alpha1.Memcached{}).
Owns(&appsv1.Deployment{}).
Owns(&infrastructurev1alpha1.Mcrouter{}).
Owns(&monitoringv1.PodMonitor{}).
Owns(&monitoringv1.PrometheusRule{}).
Complete(r)
}
// ReconcilePodMonitor reconciles the podMonitor
func (r *MemcachedReconciler) ReconcilePodMonitor(ctx context.Context, req ctrl.Request, memcached *infrastructurev1alpha1.Memcached, log logr.Logger, labels map[string]string) (ctrl.Result, error) {
podMonitor := &monitoringv1.PodMonitor{
TypeMeta: metav1.TypeMeta{
APIVersion: "monitoring.coreos.com/v1",
Kind: "PodMonitor",
},
ObjectMeta: metav1.ObjectMeta{
Namespace: req.Namespace,
Name: "memcached-podmonitor",
},
}
op, err := k8sutils.CreateOrUpdate(ctx, r, podMonitor, func() error {
return builders.PodMonitor(podMonitor, memcached, r.Scheme).
Labels(labels).
Selector(map[string]string{
"app.kubernetes.io/name": "memcached",
}).
PodMetricsEndpoints(
builders.PodMetricsEndpoint().
Port("metrics").
Path("/metrics").
Interval("15s"),
).Build()
})
if err != nil {
return ctrl.Result{}, err
}
log.WithValues("resource", "podmonitor").WithValues("op", op).Info("Reconciled")
return ctrl.Result{}, nil
}
// ReconcilePrometheusRule reconciles the prometheusRule
func (r *MemcachedReconciler) ReconcilePrometheusRule(ctx context.Context, req ctrl.Request, memcached *infrastructurev1alpha1.Memcached, log logr.Logger, labels map[string]string) (ctrl.Result, error) {
alertRule := &monitoringv1.PrometheusRule{
ObjectMeta: metav1.ObjectMeta{
Namespace: req.Namespace,
Name: "memcached-alertrule",
},
}
op, err := k8sutils.CreateOrUpdate(ctx, r, alertRule, func() error {
return builders.PrometheusRule(alertRule, memcached, r.Scheme).
Labels(labels).
RuleGroups(builders.RuleGroup().
Name("memcached-rule").
Rules(
builders.Rule().
Alert("MemcachedDown").
Priority(3).
Expr("memcached_up == 0"),
builders.Rule().
Alert("MemcachedMaxConnections").
Priority(3).
Expr("memcached_current_connections/memcached_max_connections * 100 > 95"),
builders.Rule().
Alert("MemcachedMaxConnections").
Priority(4).
Expr("memcached_current_connections/memcached_max_connections * 100 > 90"),
).
Interval("1m")).
Build()
})
if err != nil {
return ctrl.Result{}, err
}
log.WithValues("resource", "memcached-alertrule").WithValues("op", op).Info("Reconciled")
return ctrl.Result{}, nil
}
// ReconcileMcrouter reconciles the mcrouter
func (r *MemcachedReconciler) ReconcileMcrouter(ctx context.Context, req ctrl.Request, memcached *infrastructurev1alpha1.Memcached, log logr.Logger, labels map[string]string, mcrouterLabels map[string]string) (ctrl.Result, error) {
// Get the memcached pod list
pods := &corev1.PodList{}
if err := r.List(ctx, pods, client.InNamespace(req.Namespace), client.MatchingLabels(labels)); err != nil {
return ctrl.Result{}, err
}
// Generate list of pod IP addresses
servers := []string{}
for _, pod := range pods.Items {
// NOTE(mnaser): It's not possible that there is no pod IP assiged yet
if len(pod.Status.PodIP) == 0 {
continue
}
server := fmt.Sprintf("%s:11211", pod.Status.PodIP)
servers = append(servers, server)
}
// If we don't have any servers, requeue.
if len(servers) == 0 {
return ctrl.Result{Requeue: true}, nil
}
// Make sure that they're sorted so we're idempotent
sort.Strings(servers)
mcrouter := &infrastructurev1alpha1.Mcrouter{
ObjectMeta: metav1.ObjectMeta{
Namespace: req.Namespace,
Name: fmt.Sprintf("memcached-%s", req.Name),
},
}
op, err := k8sutils.CreateOrUpdate(ctx, r, mcrouter, func() error {
return builders.Mcrouter(mcrouter, memcached, r.Scheme).
Labels(mcrouterLabels).
NodeSelector(memcached.Spec.NodeSelector).
Tolerations(memcached.Spec.Tolerations).
Route("PoolRoute|default").
Pool("default", builders.McrouterPoolSpec().Servers(servers)).
Build()
})
if err != nil {
return ctrl.Result{}, err
}
log.WithValues("resource", "Mcrouter").WithValues("op", op).Info("Reconciled")
return ctrl.Result{}, nil
}
// ReconcileDeployment reconciles the deployment
func (r *MemcachedReconciler) ReconcileDeployment(ctx context.Context, req ctrl.Request, memcached *infrastructurev1alpha1.Memcached, log logr.Logger, labels map[string]string) (ctrl.Result, error) {
// Calculate size per shared
size := memcached.Spec.Megabytes / 2
deployment := &appsv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Namespace: req.Namespace,
Name: fmt.Sprintf("memcached-%s", req.Name),
Labels: labels,
},
}
op, err := k8sutils.CreateOrUpdate(ctx, r, deployment, func() error {
return builders.Deployment(deployment, memcached, r.Scheme).
Labels(labels).
Replicas(2).
PodTemplateSpec(
builders.PodTemplateSpec().
Labels(labels).
PodSpec(
builders.PodSpec().
NodeSelector(memcached.Spec.NodeSelector).
Tolerations(memcached.Spec.Tolerations).
Containers(
builders.Container("memcached", "vexxhost/memcached:latest").
Args("-m", strconv.Itoa(size)).
Port("memcached", 11211).PortProbe("memcached", 10, 30).
Resources(1000, int64(size), 500, 1.10).
SecurityContext(
builders.SecurityContext().
RunAsUser(1001),
),
builders.Container("exporter", "vexxhost/memcached-exporter:latest").
Port("metrics", 9150).HTTPProbe("metrics", "/metrics", 10, 30).
Resources(500, 128, 500, 2).
SecurityContext(
builders.SecurityContext().
RunAsUser(1001),
),
),
),
).
Build()
})
if err != nil {
return ctrl.Result{}, err
}
log.WithValues("resource", "Deployment").WithValues("op", op).Info("Reconciled")
return ctrl.Result{}, nil
}

17
images/openstack-operator/Dockerfile
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@ -38,11 +38,14 @@ COPY version/ version/
# Build
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -ldflags "-X version.Revision=${REV}" -a -o manager main.go
# Use distroless as minimal base image to package the manager binary
# Refer to https://github.com/GoogleContainerTools/distroless for more details
FROM gcr.io/distroless/static:nonroot
WORKDIR /
COPY --from=builder /workspace/manager .
USER nonroot:nonroot
# NOTE(mnaser): Rename python-builder to builder
FROM docker.io/opendevorg/python-builder as python-builder
COPY . /tmp/src
RUN assemble
ENTRYPOINT ["/manager"]
FROM docker.io/opendevorg/python-base
COPY --from=python-builder /output/ /output
RUN /output/install-from-bindep
# TODO(mnaser): Drop this
COPY --from=builder /workspace/manager /manager

13
main.go
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@ -75,7 +75,6 @@ func main() {
// Setup controllers with manager
setupMcrouterReconciler(mgr)
setupMemcachedReconciler(mgr)
setupRabbitmqReconciler(mgr)
setupZoneReconciler(mgr, designateClientBuilder)
setupDesignateReconciler(mgr, designateClientBuilder)
@ -126,18 +125,6 @@ func setupMcrouterReconciler(mgr ctrl.Manager) {
}
}
// setupMemcachedReconciler setups the Memcached controller with manager
func setupMemcachedReconciler(mgr ctrl.Manager) {
if err := (&controllers.MemcachedReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("Memcached"),
Scheme: mgr.GetScheme(),
}).SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Memcached")
os.Exit(1)
}
}
// setupRabbitmqReconciler setups the Rabbitmq controller with manager
func setupRabbitmqReconciler(mgr ctrl.Manager) {
if err := (&controllers.RabbitmqReconciler{

0
openstack_operator/__init__.py Normal file
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72
openstack_operator/memcached.py Normal file
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@ -0,0 +1,72 @@
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
"""Memcached Operator
This module maintains the operator for Memcached, it takes care of creating
the appropriate deployments, Mcrouter, pod monitors and Prometheus rules.
"""
import kopf
from openstack_operator import utils
@kopf.on.resume('infrastructure.vexxhost.cloud', 'v1alpha1', 'memcacheds')
@kopf.on.create('infrastructure.vexxhost.cloud', 'v1alpha1', 'memcacheds')
def create_or_resume(name, spec, **_):
"""Create and re-sync any Memcached instances
This function is called when a new resource is created but also when we
start the service up for the first time.
"""
utils.create_or_update('memcached/deployment.yml.j2',
name=name, spec=spec)
utils.create_or_update('memcached/podmonitor.yml.j2',
name=name, spec=spec)
utils.create_or_update('memcached/prometheusrule.yml.j2',
name=name, spec=spec)
@kopf.on.update('infrastructure.vexxhost.cloud', 'v1alpha1', 'memcacheds')
def update(name, spec, **_):
"""Update a Memcached
This function updates the deployment for Memcached if there are any
changes that happen within it.
"""
utils.create_or_update('memcached/deployment.yml.j2',
name=name, spec=spec)
@kopf.on.event('apps', 'v1', 'deployments', labels={
'app.kubernetes.io/managed-by': 'openstack-operator',
'app.kubernetes.io/name': 'memcached',
})
def deployment_event(namespace, meta, spec, **_):
"""Create and re-sync Mcrouter instances
This function takes care of watching for the readyReplicas on the
Deployments for Memcached to both update and synchronize the Mcrouter.
"""
name = meta['labels']['app.kubernetes.io/instance']
selector = spec['selector']['matchLabels']
servers = utils.get_ready_pod_ips(namespace, selector)
utils.create_or_update('memcached/mcrouter.yml.j2',
name=name, servers=servers,
spec=spec['template']['spec'])

68
openstack_operator/objects.py Normal file
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@ -0,0 +1,68 @@
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
"""Kubernetes Objects
This module maintains a list of all of the Kubernetes objects that are used
by the operator. It also includes a few of the custom ones that we use which
are not part of ``pykube``.
It also inclues a ``dict`` with mappings which allows doing reverse-lookups
from combinations of apiVersion and kind to the exact model.
"""
from pykube.objects import Deployment
from pykube.objects import NamespacedAPIObject
from pykube.objects import Pod
class Mcrouter(NamespacedAPIObject):
"""Mcrouter Kubernetes object"""
version = "infrastructure.vexxhost.cloud/v1alpha1"
endpoint = "mcrouters"
kind = "Mcrouter"
class PodMonitor(NamespacedAPIObject):
"""PodMonitor Kubernetes object"""
version = "monitoring.coreos.com/v1"
endpoint = "podmonitors"
kind = "PodMonitor"
class PrometheusRule(NamespacedAPIObject):
"""PrometheusRule Kubernetes object"""
version = "monitoring.coreos.com/v1"
endpoint = "prometheusrules"
kind = "PrometheusRule"
MAPPING = {
"v1": {
"Pod": Pod,
},
"apps/v1": {
"Deployment": Deployment,
},
"infrastructure.vexxhost.cloud/v1alpha1": {
"Mcrouter": Mcrouter,
},
"monitoring.coreos.com/v1": {
"PodMonitor": PodMonitor,
"PrometheusRule": PrometheusRule,
}
}

89
openstack_operator/templates/memcached/deployment.yml.j2 Normal file
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@ -0,0 +1,89 @@
---
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
apiVersion: apps/v1
kind: Deployment
metadata:
name: memcached-{{ name }}
labels:
{{ labels("memcached", name) | indent(4) }}
spec:
replicas: 2
selector:
matchLabels:
{{ labels("memcached", name) | indent(6) }}
template:
metadata:
labels:
{{ labels("memcached", name) | indent(8) }}
spec:
containers:
- name: memcached
image: vexxhost/memcached:latest
args: ["-m", "{{ (spec.megabytes / 2) | int }}"]
imagePullPolicy: Always
ports:
- name: memcached
containerPort: 11211
livenessProbe:
tcpSocket:
port: memcached
readinessProbe:
tcpSocket:
port: memcached
resources:
limits:
cpu: 50m
ephemeral-storage: 50M
memory: {{ (spec.megabytes / 2) | int + 64 }}M
requests:
cpu: 10m
ephemeral-storage: 50M
memory: {{ (spec.megabytes / 2) | int }}M
securityContext:
runAsUser: 1001
- name: exporter
image: vexxhost/memcached_exporter:latest
imagePullPolicy: Always
ports:
- name: metrics
containerPort: 9150
livenessProbe:
httpGet:
path: /metrics
port: metrics
readinessProbe:
httpGet:
path: /metrics
port: metrics
resources:
limits:
cpu: 100m
ephemeral-storage: 10M
memory: 64Mi
requests:
cpu: 50m
ephemeral-storage: 10M
memory: 32Mi
securityContext:
runAsUser: 1001
{% if 'nodeSelector' in spec %}
nodeSelector:
{{ spec.nodeSelector | to_yaml | indent(8) }}
{% endif %}
{% if 'tolerations' in spec %}
tolerations:
{{ spec.tolerations | to_yaml | indent(8) }}
{% endif %}

33
openstack_operator/templates/memcached/mcrouter.yml.j2 Normal file
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@ -0,0 +1,33 @@
---
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
apiVersion: infrastructure.vexxhost.cloud/v1alpha1
kind: Mcrouter
metadata:
name: memcached-{{ name }}
spec:
pools:
default:
servers:
{{ servers | to_yaml | indent(8) }}
route: PoolRoute|default
{% if 'nodeSelector' in spec %}
nodeSelector:
{{ spec.nodeSelector | to_yaml | indent(4) }}
{% endif %}
{% if 'tolerations' in spec %}
tolerations:
{{ spec.tolerations | to_yaml | indent(4) }}
{% endif %}

29
openstack_operator/templates/memcached/podmonitor.yml.j2 Normal file
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@ -0,0 +1,29 @@
---
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
apiVersion: monitoring.coreos.com/v1
kind: PodMonitor
metadata:
name: memcached-{{ name }}
labels:
{{ labels("memcached", name) | indent(4) }}
spec:
podMetricsEndpoints:
- interval: 15s
path: /metrics
port: metrics
selector:
matchLabels:
{{ labels("memcached", name) | indent(6) }}

39
openstack_operator/templates/memcached/prometheusrule.yml.j2 Normal file
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@ -0,0 +1,39 @@
---
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
name: memcached-{{ name }}
labels:
{{ labels("memcached", name) | indent(4) }}
spec:
groups:
- name: down
rules:
- alert: MemcachedDown
expr: memcached_up == 0
annotations:
priority: P3
- name: connection-limits
rules:
- alert: MemcachedMaxConnections
expr: memcached_current_connections/memcached_max_connections * 100 > 95
annotations:
priority: P3
- alert: MemcachedMaxConnections
expr: memcached_current_connections/memcached_max_connections * 100 > 90
annotations:
priority: P4

126
openstack_operator/utils.py Normal file
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@ -0,0 +1,126 @@
# Copyright 2020 VEXXHOST, Inc.
#
# 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.
"""Utilities
The module contains a few useful utilities which we refactor out in order
to be able to use them across all different operators.
"""
import copy
import operator
import os
import jinja2
import kopf
import pykube
import yaml
from openstack_operator import objects
DIR_PATH = os.path.dirname(os.path.realpath(__file__))
def to_yaml(value):
"""Return a YAML string from a dictionary."""
return yaml.safe_dump(value)
def labels(app, instance):
"""Return standard labels for the operator."""
return yaml.safe_dump({
'app.kubernetes.io/managed-by': 'openstack-operator',
'app.kubernetes.io/name': app,
'app.kubernetes.io/instance': instance,
}).strip()
ENV = jinja2.Environment(
loader=jinja2.FileSystemLoader("%s/templates" % DIR_PATH)
)
ENV.filters['to_yaml'] = to_yaml
ENV.globals['labels'] = labels
def create_or_update(template, **kwargs):
"""Create or update a Kubernetes resource.
This function is called with a template and the args to pass to that
template and it will generate a Kubernetes object, with that
object, it will try and check if it exists. If it does, it will run
an update, if not, it will create the new object.
"""
resource = generate_object(template, **kwargs)
obj = copy.deepcopy(resource.obj)
# Try to get the remote record
try:
resource.reload()
resource.obj = obj
resource.update()
except pykube.exceptions.HTTPError as exc:
if exc.code != 404:
raise
resource.create()
def generate_yaml(template, **kwargs):
"""Generate dictionary from YAML template.
This takes a Jinja2 template, renders it using all the passed ``kwargs``
and then runs ``adopt`` as well to prepare it to be committed to the
cluster.
"""
template = ENV.get_template(template)
yamldoc = template.render(**kwargs)
doc = yaml.safe_load(yamldoc)
kopf.adopt(doc)
return doc
def generate_object(template, **kwargs):
"""Generate Kubernetes object
This function renders a Jinja2 template provided into a Kubernetes object
based on the ``apiVersion`` and ``kind`` from the generated YAML file.
"""
doc = generate_yaml(template, **kwargs)
api_version = doc['apiVersion']
kind = doc['kind']
resource = objects.MAPPING[api_version][kind]
api = pykube.HTTPClient(pykube.KubeConfig.from_env())
return resource(api, doc)
def get_ready_pod_ips(namespace, selector):
"""Get list of all ready pod IPs.
This is a helper function which given a selector, will retrieve all pods
and return the IP addresses of the ones that are ready.
"""
api = pykube.HTTPClient(pykube.KubeConfig.from_env())
pods = objects.Pod.objects(api).filter(namespace=namespace,
selector=selector)
ready_pods = filter(operator.attrgetter("ready"), pods)
servers = sorted([p.obj["status"]["podIP"] for p in ready_pods])
return servers

2
requirements.txt Normal file
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@ -0,0 +1,2 @@
kopf
Jinja2

6
setup.cfg Normal file
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@ -0,0 +1,6 @@
[metadata]
name = openstack-operator
[files]
packages =
openstack_operator

19
setup.py Normal file
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@ -0,0 +1,19 @@
# Copyright 2020 VEXXHOST, Inc.
#
# 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 setuptools
setuptools.setup(
setup_requires=['pbr'],
pbr=True)

2
test-requirements.txt Normal file
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@ -0,0 +1,2 @@
flake8
pylint

21
tox.ini
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@ -1,6 +1,8 @@
[tox]
minversion = 2.0
skipsdist = True
minversion = 3.1.1
[testenv]
usedevelop = True
[testenv:update-zuul-jobs]
deps =
@ -8,6 +10,21 @@ deps =
commands =
{toxinidir}/hack/update-zuul-jobs.py
[testenv:linters]
basepython = python3.7
deps =
-rtest-requirements.txt
-rrequirements.txt
commands =
pylint openstack_operator
flake8 openstack_operator
[testenv:kopf]
deps =
-rrequirements.txt
commands =
kopf run {posargs}
[testenv:docs]
deps =
-r{toxinidir}/doc/requirements.txt

10
zuul.d/misc-jobs.yaml
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@ -4,16 +4,22 @@
vars:
zuul_work_dir: "{{ zuul.project.src_dir }}/chart"
- job:
name: openstack-operator:linters:tox
parent: tox-linters
vars:
python_version: 3.7
- project:
templates:
- publish-opendev-tox-docs
check:
jobs:
- golangci-lint
- golang-go-test
- openstack-operator:linters:chart
- openstack-operator:linters:tox
gate:
jobs:
- golangci-lint
- golang-go-test
- openstack-operator:linters:chart
- openstack-operator:linters:tox