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sts.go
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sts.go
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/*
* Copyright (c) 2018 WSO2 Inc. (http:www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you 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 sts
import (
"fmt"
"reflect"
"go.uber.org/zap"
"k8s.io/apimachinery/pkg/api/errors"
istionetworkingv1alpha3 "cellery.io/cellery-controller/pkg/apis/istio/networking/v1alpha3"
"cellery.io/cellery-controller/pkg/apis/mesh/v1alpha2"
"cellery.io/cellery-controller/pkg/clients"
"cellery.io/cellery-controller/pkg/config"
"cellery.io/cellery-controller/pkg/controller"
"cellery.io/cellery-controller/pkg/controller/sts/resources"
meshclientset "cellery.io/cellery-controller/pkg/generated/clientset/versioned"
"cellery.io/cellery-controller/pkg/informers"
//appsv1informers "k8s.io/client-go/informers/apps/v1"
//corev1informers "k8s.io/client-go/informers/core/v1"
appsv1 "k8s.io/api/apps/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
//corev1informers "k8s.io/client-go/informers/core/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes/scheme"
typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
appsv1listers "k8s.io/client-go/listers/apps/v1"
corev1listers "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/record"
mesh1alpha2listers "cellery.io/cellery-controller/pkg/generated/listers/mesh/v1alpha2"
istionetwork1alpha3listers "cellery.io/cellery-controller/pkg/generated/listers/networking/v1alpha3"
)
type reconciler struct {
kubeClient kubernetes.Interface
meshClient meshclientset.Interface
deploymentLister appsv1listers.DeploymentLister
serviceLister corev1listers.ServiceLister
istioEnvoyFilterLister istionetwork1alpha3listers.EnvoyFilterLister
configMapLister corev1listers.ConfigMapLister
tokenServiceLister mesh1alpha2listers.TokenServiceLister
cfg config.Interface
logger *zap.SugaredLogger
recorder record.EventRecorder
}
func NewController(
clientset clients.Interface,
informerset informers.Interface,
cfg config.Interface,
logger *zap.SugaredLogger,
) *controller.Controller {
r := &reconciler{
kubeClient: clientset.Kubernetes(),
meshClient: clientset.Mesh(),
deploymentLister: informerset.Deployments().Lister(),
serviceLister: informerset.Services().Lister(),
istioEnvoyFilterLister: informerset.IstioEnvoyFilters().Lister(),
configMapLister: informerset.ConfigMaps().Lister(),
tokenServiceLister: informerset.TokenServices().Lister(),
cfg: cfg,
logger: logger.Named("tokenservice-controller"),
}
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(r.logger.Named("events").Infof)
eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{Interface: r.kubeClient.CoreV1().Events("")})
recorder := eventBroadcaster.NewRecorder(scheme.Scheme, corev1.EventSource{Component: "tokenservice-controller"})
r.recorder = recorder
c := controller.New(r, r.logger, "TokenService")
r.logger.Info("Setting up event handlers")
informerset.TokenServices().Informer().AddEventHandler(informers.HandleAll(c.Enqueue))
informerset.Services().Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: informers.FilterWithOwnerGroupVersionKind(v1alpha2.SchemeGroupVersion.WithKind("TokenService")),
Handler: informers.HandleAll(c.EnqueueControllerOf),
})
informerset.Deployments().Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: informers.FilterWithOwnerGroupVersionKind(v1alpha2.SchemeGroupVersion.WithKind("TokenService")),
Handler: informers.HandleAll(c.EnqueueControllerOf),
})
informerset.ConfigMaps().Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: informers.FilterWithOwnerGroupVersionKind(v1alpha2.SchemeGroupVersion.WithKind("TokenService")),
Handler: informers.HandleAll(c.EnqueueControllerOf),
})
informerset.IstioEnvoyFilters().Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: informers.FilterWithOwnerGroupVersionKind(v1alpha2.SchemeGroupVersion.WithKind("TokenService")),
Handler: informers.HandleAll(c.EnqueueControllerOf),
})
return c
}
func (r *reconciler) Reconcile(key string) error {
r.logger.Infof("Reconcile called with %s", key)
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
r.logger.Errorf("invalid resource key: %s", key)
return nil
}
original, err := r.tokenServiceLister.TokenServices(namespace).Get(name)
if err != nil {
if errors.IsNotFound(err) {
r.logger.Errorf("tokenService '%s' in work queue no longer exists", key)
return nil
}
return err
}
tokenService := original.DeepCopy()
if err = r.reconcile(tokenService); err != nil {
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "InternalError", "Failed to update cluster: %v", err)
return err
}
if equality.Semantic.DeepEqual(original.Status, tokenService.Status) {
return nil
}
if _, err = r.updateStatus(tokenService); err != nil {
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "UpdateFailed", "Failed to update status: %v", err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Updated", "Updated TokenService status %q", tokenService.GetName())
return nil
}
func (r *reconciler) reconcile(tokenService *v1alpha2.TokenService) error {
tokenService.Default()
rErrs := &controller.ReconcileErrors{}
rErrs.Add(r.reconcileService(tokenService))
rErrs.Add(r.reconcileConfigMap(tokenService))
rErrs.Add(r.reconcileOpaConfigMap(tokenService))
rErrs.Add(r.reconcileDeployment(tokenService))
rErrs.Add(r.reconcileEnvoyFilter(tokenService))
if !rErrs.Empty() {
return rErrs
}
tokenService.Status.ObservedGeneration = tokenService.Generation
return nil
}
func (r *reconciler) reconcileService(tokenService *v1alpha2.TokenService) error {
serviceName := resources.ServiceName(tokenService)
service, err := r.serviceLister.Services(tokenService.Namespace).Get(serviceName)
if errors.IsNotFound(err) {
service, err = r.kubeClient.CoreV1().Services(tokenService.Namespace).Create(resources.MakeService(tokenService))
if err != nil {
r.logger.Errorf("Failed to create Service %q: %v", serviceName, err)
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "CreationFailed", "Failed to create Service %q: %v", serviceName, err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Created", "Created Service %q", serviceName)
} else if err != nil {
r.logger.Errorf("Failed to retrieve Service %q: %v", serviceName, err)
return err
} else if !metav1.IsControlledBy(service, tokenService) {
return fmt.Errorf("tokenService: %q does not own the Service: %q", tokenService.Name, serviceName)
} else {
service, err = func(tokenService *v1alpha2.TokenService, service *corev1.Service) (*corev1.Service, error) {
if !resources.RequireServiceUpdate(tokenService, service) {
return service, nil
}
desiredService := resources.MakeService(tokenService)
existingService := service.DeepCopy()
resources.CopyService(desiredService, existingService)
return r.kubeClient.CoreV1().Services(tokenService.Namespace).Update(existingService)
}(tokenService, service)
if err != nil {
r.logger.Errorf("Failed to update Service %q: %v", serviceName, err)
return err
}
}
resources.StatusFromService(tokenService, service)
return nil
}
func (r *reconciler) reconcileConfigMap(tokenService *v1alpha2.TokenService) error {
configMapName := resources.ConfigMapName(tokenService)
configMap, err := r.configMapLister.ConfigMaps(tokenService.Namespace).Get(configMapName)
if errors.IsNotFound(err) {
configMap, err = r.kubeClient.CoreV1().ConfigMaps(tokenService.Namespace).Create(resources.MakeConfigMap(tokenService, r.cfg))
if err != nil {
r.logger.Errorf("Failed to create ConfigMap %q: %v", configMapName, err)
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "CreationFailed", "Failed to create ConfigMap %q: %v", configMapName, err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Created", "Created ConfigMap %q", configMapName)
} else if err != nil {
r.logger.Errorf("Failed to retrieve ConfigMap %q: %v", configMapName, err)
return err
} else if !metav1.IsControlledBy(configMap, tokenService) {
return fmt.Errorf("tokenService: %q does not own the ConfigMap: %q", tokenService.Name, configMapName)
} else {
configMap, err = func(tokenService *v1alpha2.TokenService, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error) {
if !resources.RequireConfigMapUpdate(tokenService, configMap) {
return configMap, nil
}
desiredConfigMap := resources.MakeConfigMap(tokenService, r.cfg)
existingConfigMap := configMap.DeepCopy()
resources.CopyConfigMap(desiredConfigMap, existingConfigMap)
return r.kubeClient.CoreV1().ConfigMaps(tokenService.Namespace).Update(existingConfigMap)
}(tokenService, configMap)
if err != nil {
r.logger.Errorf("Failed to update ConfigMap %q: %v", configMapName, err)
return err
}
}
resources.StatusFromConfigMap(tokenService, configMap)
return nil
}
func (r *reconciler) reconcileOpaConfigMap(tokenService *v1alpha2.TokenService) error {
configMapName := resources.OpaPolicyConfigMapName(tokenService)
configMap, err := r.configMapLister.ConfigMaps(tokenService.Namespace).Get(configMapName)
if errors.IsNotFound(err) {
configMap, err = r.kubeClient.CoreV1().ConfigMaps(tokenService.Namespace).Create(resources.MakeOpaConfigMap(tokenService, r.cfg))
if err != nil {
r.logger.Errorf("Failed to create OPA ConfigMap %q: %v", configMapName, err)
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "CreationFailed", "Failed to create OPA ConfigMap %q: %v", configMapName, err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Created", "Created OPA ConfigMap %q", configMapName)
} else if err != nil {
r.logger.Errorf("Failed to retrieve OPA ConfigMap %q: %v", configMapName, err)
return err
} else if !metav1.IsControlledBy(configMap, tokenService) {
return fmt.Errorf("tokenService: %q does not own the OPA ConfigMap: %q", tokenService.Name, configMapName)
} else {
configMap, err = func(tokenService *v1alpha2.TokenService, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error) {
if !resources.RequireOpaConfigMapUpdate(tokenService, configMap) {
return configMap, nil
}
desiredConfigMap := resources.MakeOpaConfigMap(tokenService, r.cfg)
existingConfigMap := configMap.DeepCopy()
resources.CopyOpaConfigMap(desiredConfigMap, existingConfigMap)
return r.kubeClient.CoreV1().ConfigMaps(tokenService.Namespace).Update(existingConfigMap)
}(tokenService, configMap)
if err != nil {
r.logger.Errorf("Failed to update OPA ConfigMap %q: %v", configMapName, err)
return err
}
}
resources.StatusFromOpaConfigMap(tokenService, configMap)
return nil
}
func (r *reconciler) reconcileDeployment(tokenService *v1alpha2.TokenService) error {
deploymentName := resources.DeploymentName(tokenService)
deployment, err := r.deploymentLister.Deployments(tokenService.Namespace).Get(deploymentName)
if errors.IsNotFound(err) {
deployment, err = r.kubeClient.AppsV1().Deployments(tokenService.Namespace).Create(resources.MakeDeployment(tokenService, r.cfg))
if err != nil {
r.logger.Errorf("Failed to create Deployment %q: %v", deploymentName, err)
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "CreationFailed", "Failed to create Deployment %q: %v", deploymentName, err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Created", "Created Deployment %q", deploymentName)
} else if err != nil {
r.logger.Errorf("Failed to retrieve Deployment %q: %v", deploymentName, err)
return err
} else if !metav1.IsControlledBy(deployment, tokenService) {
return fmt.Errorf("tokenService: %q does not own the Deployment: %q", tokenService.Name, deploymentName)
} else {
deployment, err = func(tokenService *v1alpha2.TokenService, deployment *appsv1.Deployment) (*appsv1.Deployment, error) {
if !resources.RequireDeploymentUpdate(tokenService, deployment) {
return deployment, nil
}
desiredDeployment := resources.MakeDeployment(tokenService, r.cfg)
existingDeployment := deployment.DeepCopy()
resources.CopyDeployment(desiredDeployment, existingDeployment)
return r.kubeClient.AppsV1().Deployments(tokenService.Namespace).Update(existingDeployment)
}(tokenService, deployment)
if err != nil {
r.logger.Errorf("Failed to update Deployment %q: %v", deploymentName, err)
return err
}
}
resources.StatusFromDeployment(tokenService, deployment)
return nil
}
func (r *reconciler) reconcileEnvoyFilter(tokenService *v1alpha2.TokenService) error {
envoyFilterName := resources.EnvoyFilterName(tokenService)
envoyFilter, err := r.istioEnvoyFilterLister.EnvoyFilters(tokenService.Namespace).Get(envoyFilterName)
if !resources.RequireEnvoyFilter(tokenService) {
if err == nil && metav1.IsControlledBy(envoyFilter, tokenService) {
err = r.meshClient.NetworkingV1alpha3().EnvoyFilters(tokenService.Namespace).Delete(envoyFilterName, &metav1.DeleteOptions{})
if err != nil {
r.logger.Errorf("Failed to delete EnvoyFilter %q: %v", envoyFilterName, err)
return err
}
}
return nil
}
if errors.IsNotFound(err) {
envoyFilter, err = r.meshClient.NetworkingV1alpha3().EnvoyFilters(tokenService.Namespace).Create(resources.MakeEnvoyFilter(tokenService))
if err != nil {
r.logger.Errorf("Failed to create EnvoyFilter %q: %v", envoyFilterName, err)
r.recorder.Eventf(tokenService, corev1.EventTypeWarning, "CreationFailed", "Failed to create EnvoyFilter %q: %v", envoyFilterName, err)
return err
}
r.recorder.Eventf(tokenService, corev1.EventTypeNormal, "Created", "Created EnvoyFilter %q", envoyFilterName)
} else if err != nil {
r.logger.Errorf("Failed to retrieve EnvoyFilter %q: %v", envoyFilterName, err)
return err
} else if !metav1.IsControlledBy(envoyFilter, tokenService) {
return fmt.Errorf("tokenService: %q does not own the EnvoyFilter: %q", tokenService.Name, envoyFilterName)
} else {
envoyFilter, err = func(tokenService *v1alpha2.TokenService, envoyFilter *istionetworkingv1alpha3.EnvoyFilter) (*istionetworkingv1alpha3.EnvoyFilter, error) {
if !resources.RequireEnvoyFilterUpdate(tokenService, envoyFilter) {
return envoyFilter, nil
}
desiredEnvoyFilter := resources.MakeEnvoyFilter(tokenService)
if err != nil {
return nil, err
}
existingEnvoyFilter := envoyFilter.DeepCopy()
resources.CopyEnvoyFilter(desiredEnvoyFilter, existingEnvoyFilter)
return r.meshClient.NetworkingV1alpha3().EnvoyFilters(tokenService.Namespace).Update(existingEnvoyFilter)
}(tokenService, envoyFilter)
if err != nil {
r.logger.Errorf("Failed to update EnvoyFilter %q: %v", envoyFilterName, err)
return err
}
}
resources.StatusFromEnvoyFilter(tokenService, envoyFilter)
return nil
}
func (r *reconciler) updateStatus(desired *v1alpha2.TokenService) (*v1alpha2.TokenService, error) {
gateway, err := r.tokenServiceLister.TokenServices(desired.Namespace).Get(desired.Name)
if err != nil {
return nil, err
}
if !reflect.DeepEqual(gateway.Status, desired.Status) {
latest := gateway.DeepCopy()
latest.Status = desired.Status
return r.meshClient.MeshV1alpha2().TokenServices(desired.Namespace).UpdateStatus(latest)
}
return desired, nil
}