forked from chaos-mesh/chaos-mesh
/
controller.go
137 lines (114 loc) · 3.74 KB
/
controller.go
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// Copyright 2022 Chaos Mesh 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 remotechaosmonitor
import (
"context"
"reflect"
"github.com/go-logr/logr"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/util/retry"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
)
type Reconciler struct {
clusterName string
obj v1alpha1.InnerObject
logger logr.Logger
localClient client.Client
remoteClient client.Client
}
func New(obj v1alpha1.InnerObject, manageClient client.Client, clusterName string, localClient client.Client, logger logr.Logger) *Reconciler {
return &Reconciler{
clusterName: clusterName,
obj: obj,
logger: logger.WithName("remotechaos-monitor"),
localClient: manageClient,
remoteClient: localClient,
}
}
func (r *Reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
r.logger.Info("reconcile chaos", "clusterName", r.clusterName, "namespace", req.Namespace, "name", req.Name)
shouldDelete := false
remoteObj := r.obj.DeepCopyObject().(v1alpha1.RemoteObject)
err := r.remoteClient.Get(ctx, req.NamespacedName, remoteObj)
if err != nil {
if apierrors.IsNotFound(err) {
r.logger.Info("chaos not found")
shouldDelete = true
} else {
// TODO: handle this error
r.logger.Error(err, "unable to get remote chaos")
return ctrl.Result{}, nil
}
}
localObj := r.obj.DeepCopyObject().(v1alpha1.RemoteObject)
err = r.localClient.Get(ctx, req.NamespacedName, localObj)
if err != nil {
if apierrors.IsNotFound(err) {
r.logger.Info("local chaos not found")
err = r.remoteClient.Delete(ctx, remoteObj)
if err != nil {
if apierrors.IsNotFound(err) {
r.logger.Info("remote chaos deleted")
} else {
// TODO: retry for some error
r.logger.Error(err, "unable to get remote chaos")
}
}
return ctrl.Result{}, nil
}
// TODO: handle this error
r.logger.Error(err, "unable to get local chaos")
return ctrl.Result{}, nil
}
if shouldDelete {
r.logger.Info("deleting local obj", "namespace", localObj.GetNamespace(), "name", localObj.GetName())
localObj.SetFinalizers([]string{})
err := r.localClient.Update(ctx, localObj)
if err != nil {
// TODO: retry
r.logger.Error(err, "fail to update localObj")
// it's expected to not return, as we could still try
// to remove this object
}
err = r.localClient.Delete(ctx, localObj)
if err != nil {
// TODO: retry
r.logger.Error(err, "fail to delete local object")
}
return ctrl.Result{}, nil
}
shouldUpdate := false
if !reflect.DeepEqual(localObj.GetFinalizers(), remoteObj.GetFinalizers()) {
r.logger.Info("setting new finalizers")
localObj.SetFinalizers(remoteObj.GetFinalizers())
shouldUpdate = true
}
// TODO: set the status
if shouldUpdate {
retry.RetryOnConflict(retry.DefaultRetry, func() error {
localObj := r.obj.DeepCopyObject().(v1alpha1.RemoteObject)
err = r.localClient.Get(ctx, req.NamespacedName, localObj)
if err != nil {
return err
}
// TODO: also refresh the remote chaos object
localObj.SetFinalizers(remoteObj.GetFinalizers())
return r.localClient.Update(ctx, localObj)
})
}
return ctrl.Result{}, nil
}