/
kubedirectorconfig_controller.go
126 lines (103 loc) · 4.05 KB
/
kubedirectorconfig_controller.go
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// Copyright 2019 Hewlett Packard Enterprise Development LP
// 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 kubedirectorconfig
import (
"context"
"fmt"
kdv1 "github.com/bluek8s/kubedirector/pkg/apis/kubedirector/v1beta1"
"github.com/bluek8s/kubedirector/pkg/shared"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var log = logf.Log.WithName("controller_kubedirectorconfig")
// Add creates a new KubeDirectorConfig Controller and adds it to the Manager.
// The Manager will set fields on the Controller and Start it when the Manager
// is Started.
func Add(
mgr manager.Manager,
) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler.
func newReconciler(
mgr manager.Manager,
) reconcile.Reconciler {
return &ReconcileKubeDirectorConfig{scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler.
func add(
mgr manager.Manager,
r reconcile.Reconciler,
) error {
// Create a new controller
c, err := controller.New("kubedirectorconfig-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource KubeDirectorConfig.
err = c.Watch(&source.Kind{Type: &kdv1.KubeDirectorConfig{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileKubeDirectorConfig implements
// reconcile.Reconciler.
var _ reconcile.Reconciler = &ReconcileKubeDirectorConfig{}
const (
// Period between the time when the controller requeues a request and
// it's scheduled again for reconciliation. Zero means don't poll.
// For now we don't need polling on this CR. Some anticipated features
// will need polling at which point we can change this.
//reconcilePeriod = 30 * time.Second
reconcilePeriod = 0
)
// ReconcileKubeDirectorConfig reconciles a KubeDirectorConfig object.
type ReconcileKubeDirectorConfig struct {
scheme *runtime.Scheme
}
// Reconcile reads that state of the cluster for a KubeDirectorConfig object
// and makes changes based on the state read and what is in the
// KubeDirectorConfig.Spec.
// Note:
// The Controller will requeue the Request to be processed again if the
// returned error is non-nil or Result.Requeue is true, otherwise upon
// completion it will remove the work from the queue.
func (r *ReconcileKubeDirectorConfig) Reconcile(
request reconcile.Request,
) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reconcileResult := reconcile.Result{RequeueAfter: reconcilePeriod}
// Fetch the KubeDirectorConfig instance.
cr := &kdv1.KubeDirectorConfig{}
err := shared.Get(context.TODO(), request.NamespacedName, cr)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after
// reconcile request. Owned objects are automatically garbage
// collected. For additional cleanup logic use finalizers.
// Return and don't requeue.
shared.RemoveGlobalConfig()
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcileResult,
fmt.Errorf("could not fetch KubeDirectorConfig instance: %s", err)
}
err = r.syncConfig(reqLogger, cr)
return reconcileResult, err
}