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add_services.go
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add_services.go
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/*
* add_services.go
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2020-2021 Apple Inc. and the FoundationDB project authors
*
* 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"
"github.com/FoundationDB/fdb-kubernetes-operator/internal"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/api/equality"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
fdbv1beta2 "github.com/FoundationDB/fdb-kubernetes-operator/api/v1beta2"
corev1 "k8s.io/api/core/v1"
)
// addServices provides a reconciliation step for adding services to a cluster.
type addServices struct{}
// reconcile runs the reconciler's work.
func (a addServices) reconcile(ctx context.Context, r *FoundationDBClusterReconciler, cluster *fdbv1beta2.FoundationDBCluster, _ *fdbv1beta2.FoundationDBStatus, logger logr.Logger) *requeue {
headlessService := internal.GetHeadlessService(cluster)
if headlessService != nil {
existingService := &corev1.Service{}
err := r.Get(ctx, client.ObjectKey{Namespace: cluster.Namespace, Name: cluster.Name}, existingService)
if err == nil {
err = updateService(ctx, logger, cluster, r, existingService, headlessService)
if err != nil {
return &requeue{curError: err, delayedRequeue: true}
}
} else {
if !k8serrors.IsNotFound(err) {
return &requeue{curError: err}
}
owner := internal.BuildOwnerReference(cluster.TypeMeta, cluster.ObjectMeta)
headlessService.ObjectMeta.OwnerReferences = owner
logger.V(1).Info("Creating service", "name", headlessService.Name)
err = r.Create(ctx, headlessService)
if err != nil {
return &requeue{curError: err, delayedRequeue: true}
}
}
}
if cluster.GetPublicIPSource() == fdbv1beta2.PublicIPSourceService {
for _, processGroup := range cluster.Status.ProcessGroups {
if processGroup.IsMarkedForRemoval() && processGroup.IsExcluded() {
continue
}
service, err := internal.GetService(cluster, processGroup)
if err != nil {
return &requeue{curError: err, delayedRequeue: true}
}
existingService := &corev1.Service{}
err = r.Get(ctx, client.ObjectKey{Namespace: cluster.Namespace, Name: service.Name}, existingService)
if err == nil {
err = updateService(ctx, logger, cluster, r, existingService, service)
if err != nil {
return &requeue{curError: err, delayedRequeue: true}
}
} else if k8serrors.IsNotFound(err) {
logger.V(1).Info("Creating service", "name", service.Name)
err = r.Create(ctx, service)
if err != nil {
return &requeue{curError: err, delayedRequeue: true}
}
} else {
return &requeue{curError: err, delayedRequeue: true}
}
}
}
return nil
}
// requiresRecreation returns true if the cluster supports podIPFamily as IPv6 and the existing service does not have
// IPv6 in the IPFamilies.
func requiresRecreation(cluster *fdbv1beta2.FoundationDBCluster, existingService *corev1.Service) bool {
return cluster.IsPodIPFamily6() && (existingService.Spec.IPFamilies == nil || existingService.Spec.IPFamilies[0] != corev1.IPv6Protocol)
}
// recreateService removes the existing service and create a new service.
func recreateService(ctx context.Context, r *FoundationDBClusterReconciler, currentService *corev1.Service, newService *corev1.Service, logger logr.Logger) error {
logger.V(1).Info("Recreating service", "name", newService.Name)
err := r.Delete(ctx, currentService)
if err != nil {
return err
}
err = r.Create(ctx, newService)
return err
}
// updateServices updates selected safe fields on a service based on a new
// service definition.
func updateService(ctx context.Context, logger logr.Logger, cluster *fdbv1beta2.FoundationDBCluster, r *FoundationDBClusterReconciler, currentService *corev1.Service, newService *corev1.Service) error {
if requiresRecreation(cluster, currentService) {
return recreateService(ctx, r, currentService, newService, logger)
}
originalSpec := currentService.Spec.DeepCopy()
currentService.Spec.Selector = newService.Spec.Selector
needsUpdate := !equality.Semantic.DeepEqual(currentService.Spec, *originalSpec)
metadata := currentService.ObjectMeta
if mergeLabelsInMetadata(&metadata, newService.ObjectMeta) {
needsUpdate = true
}
if mergeAnnotations(&metadata, newService.ObjectMeta) {
needsUpdate = true
}
if needsUpdate {
currentService.ObjectMeta = metadata
logger.Info("Updating service")
return r.Update(ctx, currentService)
}
return nil
}