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serviceimport.go
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serviceimport.go
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/*
Copyright 2020 The Kubernetes 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/go-logr/logr"
v1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/mcs-api/pkg/apis/v1alpha1"
)
// ServiceImportReconciler reconciles a ServiceImport object
type ServiceImportReconciler struct {
client.Client
Log logr.Logger
}
// +kubebuilder:rbac:groups=multicluster.x-k8s.io,resources=serviceimports,verbs=get;list;watch;update;patch
func servicePorts(svcImport *v1alpha1.ServiceImport) []v1.ServicePort {
ports := make([]v1.ServicePort, len(svcImport.Spec.Ports))
for i, p := range svcImport.Spec.Ports {
ports[i] = v1.ServicePort{
Name: p.Name,
Protocol: p.Protocol,
Port: p.Port,
AppProtocol: p.AppProtocol,
}
}
return ports
}
func shouldIgnoreImport(svcImport *v1alpha1.ServiceImport) bool {
if svcImport.DeletionTimestamp != nil {
return true
}
if svcImport.Spec.Type != v1alpha1.ClusterSetIP {
return true
}
return false
}
// +kubebuilder:rbac:groups=core,resources=services,verbs=get;list;watch;create;update;patch
// +kubebuilder:rbac:groups=core,resources=services/status,verbs=get;list;watch;create;update;patch
// Reconcile the changes.
func (r *ServiceImportReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
serviceName := derivedName(req.NamespacedName)
log := r.Log.WithValues("serviceimport", req.NamespacedName, "derived", serviceName)
var svcImport v1alpha1.ServiceImport
if err := r.Client.Get(ctx, req.NamespacedName, &svcImport); err != nil {
return ctrl.Result{}, client.IgnoreNotFound(err)
}
if shouldIgnoreImport(&svcImport) {
return ctrl.Result{}, nil
}
// Ensure the existence of the derived service
var svc v1.Service
if svcImport.Annotations[DerivedServiceAnnotation] == "" {
if svcImport.Annotations == nil {
svcImport.Annotations = map[string]string{}
}
svcImport.Annotations[DerivedServiceAnnotation] = derivedName(req.NamespacedName)
if err := r.Client.Update(ctx, &svcImport); err != nil {
return ctrl.Result{}, err
}
log.Info("added annotation", DerivedServiceAnnotation, svcImport.Annotations[DerivedServiceAnnotation])
return ctrl.Result{}, nil
}
if err := r.Client.Get(ctx, types.NamespacedName{Namespace: req.Namespace, Name: svcImport.Annotations[DerivedServiceAnnotation]}, &svc); err == nil {
return ctrl.Result{}, nil
} else if !apierrors.IsNotFound(err) {
return ctrl.Result{}, err
}
svc = v1.Service{
ObjectMeta: metav1.ObjectMeta{
Namespace: req.Namespace,
Name: svcImport.Annotations[DerivedServiceAnnotation],
OwnerReferences: []metav1.OwnerReference{
{
Name: req.Name,
Kind: serviceImportKind,
APIVersion: v1alpha1.GroupVersion.String(),
UID: svcImport.UID,
},
},
},
Spec: v1.ServiceSpec{
Type: v1.ServiceTypeClusterIP,
Ports: servicePorts(&svcImport),
},
}
if err := r.Client.Create(ctx, &svc); err != nil {
return ctrl.Result{}, err
}
log.Info("created service")
if len(svcImport.Spec.IPs) == 0 {
return ctrl.Result{}, nil
}
// update loadbalanacer status with provided clustersetIPs
ingress := []v1.LoadBalancerIngress{}
for _, ip := range svcImport.Spec.IPs {
ingress = append(ingress, v1.LoadBalancerIngress{
IP: ip,
})
}
svc.Status = v1.ServiceStatus{
LoadBalancer: v1.LoadBalancerStatus{
Ingress: ingress,
},
}
if err := r.Client.Status().Update(ctx, &svc); err != nil {
return ctrl.Result{}, err
}
return ctrl.Result{}, nil
}
// SetupWithManager wires up the controller.
func (r *ServiceImportReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).For(&v1alpha1.ServiceImport{}).Complete(r)
}