gitpod/components/ws-manager/pkg/manager/pod_controller.go
2021-03-03 14:03:48 +01:00

92 lines
2.5 KiB
Go

// Copyright (c) 2021 Gitpod GmbH. All rights reserved.
// Licensed under the GNU Affero General Public License (AGPL).
// See License-AGPL.txt in the project root for license information.
package manager
import (
"context"
"fmt"
"github.com/gitpod-io/gitpod/common-go/log"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/util/workqueue"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/source"
)
// PodReconciler reconciles a Pod object
type PodReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
Monitor *Monitor
}
// Reconcile performs a reconciliation of a pod
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.7.0/pkg/reconcile
func (r *PodReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
return ctrl.Result{}, nil
}
type PodPoolFeeder struct {
Eventpool interface {
Add(queue string, evt watch.Event)
}
}
func (e *PodPoolFeeder) add(tpe watch.EventType, obj runtime.Object) {
if obj == nil {
return
}
var queue string
pod, ok := obj.(*corev1.Pod)
if ok {
queue = pod.Annotations[workspaceIDAnnotation]
}
if queue == "" {
log.WithError(fmt.Errorf("event object has no name: %v", obj)).Error("cannot enqueue pod event")
return
}
e.Eventpool.Add(queue, watch.Event{Type: tpe, Object: obj})
}
// Create implements EventHandler
func (e *PodPoolFeeder) Create(evt event.CreateEvent, q workqueue.RateLimitingInterface) {
e.add(watch.Added, evt.Object)
}
// Update implements EventHandler
func (e *PodPoolFeeder) Update(evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
e.add(watch.Modified, evt.ObjectNew)
}
// Delete implements EventHandler
func (e *PodPoolFeeder) Delete(evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
e.add(watch.Deleted, evt.Object)
}
// Generic implements EventHandler
func (e *PodPoolFeeder) Generic(evt event.GenericEvent, q workqueue.RateLimitingInterface) {
// TODO(cw): figure out what to do here
}
// SetupWithManager sets up the controller with the Manager.
func (r *PodReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&corev1.Pod{}).
Watches(&source.Kind{Type: &corev1.Pod{}}, &PodPoolFeeder{
Eventpool: r.Monitor.eventpool,
}).
Complete(r)
}