/
remoteexecnodes_controller.go
132 lines (115 loc) · 5.14 KB
/
remoteexecnodes_controller.go
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/*
Copyright 2023.
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"
"time"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/record"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
ytv1 "github.com/ytsaurus/yt-k8s-operator/api/v1"
)
const (
remoteClusterSpecField = "remoteClusterSpec"
)
// RemoteExecNodesReconciler reconciles a RemoteExecNodes object
type RemoteExecNodesReconciler struct {
client.Client
Scheme *runtime.Scheme
Recorder record.EventRecorder
}
//+kubebuilder:rbac:groups=cluster.ytsaurus.tech,resources=remoteexecnodes,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=cluster.ytsaurus.tech,resources=remoteexecnodes/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=cluster.ytsaurus.tech,resources=remoteexecnodes/finalizers,verbs=update
//+kubebuilder:rbac:groups=apps,resources=statefulset,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=apps,resources=statefulset/status,verbs=get
//+kubebuilder:rbac:groups=core,resources=pod,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=core,resources=pod/status,verbs=get
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
// TODO(user): Modify the Reconcile function to compare the state specified by
// the RemoteExecNodes object against the actual cluster state, and then
// perform operations to make the cluster state reflect the state specified by
// the user.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.14.4/pkg/reconcile
func (r *RemoteExecNodesReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
logger := log.FromContext(ctx)
var nodes ytv1.RemoteExecNodes
if err := r.Get(ctx, req.NamespacedName, &nodes); err != nil {
logger.Error(err, "unable to fetch remote nodes")
// We'll ignore not-found errors, since they can't be fixed by an immediate
// requeue (we'll need to wait for a new notification), and we can get them
// on deleted requests.
return ctrl.Result{}, client.IgnoreNotFound(err)
}
var remoteYtsaurus ytv1.RemoteYtsaurus
ytsaurusName := types.NamespacedName{Name: nodes.Spec.RemoteClusterSpec.Name, Namespace: req.Namespace}
if err := r.Get(ctx, ytsaurusName, &remoteYtsaurus); err != nil {
logger.Error(err, "unable to fetch remote YTsaurus for the remote nodes")
return ctrl.Result{RequeueAfter: time.Second * 10}, err
}
return r.Sync(ctx, &nodes, &remoteYtsaurus)
}
// SetupWithManager sets up the controller with the Manager.
func (r *RemoteExecNodesReconciler) SetupWithManager(mgr ctrl.Manager) error {
// See https://book.kubebuilder.io/reference/watching-resources/externally-managed for the reference implementation
if err := mgr.GetFieldIndexer().IndexField(context.Background(), &ytv1.RemoteExecNodes{}, remoteClusterSpecField, func(rawObj client.Object) []string {
remoteExecNodes := rawObj.(*ytv1.RemoteExecNodes)
if remoteExecNodes.Spec.RemoteClusterSpec == nil {
return nil
}
return []string{remoteExecNodes.Spec.RemoteClusterSpec.Name}
}); err != nil {
return err
}
return ctrl.NewControllerManagedBy(mgr).
For(&ytv1.RemoteExecNodes{}).
Watches(
&ytv1.RemoteYtsaurus{},
handler.EnqueueRequestsFromMapFunc(r.findRemoteNodesForRemoteYtsaurus),
builder.WithPredicates(predicate.ResourceVersionChangedPredicate{}),
).
Complete(r)
}
func (r *RemoteExecNodesReconciler) findRemoteNodesForRemoteYtsaurus(ctx context.Context, remoteYtsaurus client.Object) []reconcile.Request {
// See https://book.kubebuilder.io/reference/watching-resources/externally-managed for the reference implementation
attachedRemoteExecNodes := &ytv1.RemoteExecNodesList{}
listOps := &client.ListOptions{
FieldSelector: fields.OneTermEqualSelector(remoteClusterSpecField, remoteYtsaurus.GetName()),
Namespace: remoteYtsaurus.GetNamespace(),
}
err := r.List(ctx, attachedRemoteExecNodes, listOps)
if err != nil {
return []reconcile.Request{}
}
requests := make([]reconcile.Request, len(attachedRemoteExecNodes.Items))
for i, item := range attachedRemoteExecNodes.Items {
requests[i] = reconcile.Request{
NamespacedName: types.NamespacedName{
Name: item.GetName(),
Namespace: item.GetNamespace(),
},
}
}
return requests
}