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podmonitor.go
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podmonitor.go
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// Copyright 2021 IBM Corp.
//
// 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 runnables
import (
"context"
"github.com/go-logr/logr"
"github.com/redhat-marketplace/redhat-marketplace-operator/v2/pkg/config"
"github.com/redhat-marketplace/redhat-marketplace-operator/v2/pkg/utils/predicates"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/types"
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/event"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
// PodMonitor is responsible for deleting failing auth checker pods.
// Why authchecker? If you have an partial uninstall, for example,
// just delete and recreate a SA. The tokens originally associated to
// that SA are invalidated but the pods don't realize that and start throwing
// errors. Restarting the pod doesn't work because it doesn't get a new
// token on just a restart. The pod has to be deleted. Authchecker
// detects this scenario and deletes the pod for you.
type PodMonitor struct {
Logger logr.Logger
Client client.Client
Cfg *config.OperatorConfig
}
func (a *PodMonitor) SetupWithManager(mgr ctrl.Manager) error {
namespacePredicate := predicates.NamespacePredicate(a.Cfg.DeployedNamespace)
return ctrl.NewControllerManagedBy(mgr).
For(&corev1.Pod{}, builder.WithPredicates(
predicate.Funcs{
CreateFunc: func(e event.CreateEvent) bool {
return false
},
UpdateFunc: func(e event.UpdateEvent) bool {
pod := e.ObjectNew.(*corev1.Pod)
for _, status := range pod.Status.ContainerStatuses {
if status.Name == "authcheck" && !status.Ready {
if status.RestartCount > 2 {
return true
}
}
}
return false
},
DeleteFunc: func(event.DeleteEvent) bool {
return false
},
GenericFunc: func(e event.GenericEvent) bool {
return false
},
})).
WithEventFilter(namespacePredicate).
Complete(a)
}
func (a *PodMonitor) Reconcile(ctx context.Context, req reconcile.Request) (reconcile.Result, error) {
pod := &corev1.Pod{}
err := a.Client.Get(context.TODO(), types.NamespacedName{Name: req.Name, Namespace: req.Namespace}, pod)
if err != nil {
if k8serrors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
err = a.Client.Delete(context.TODO(), pod)
if err != nil {
if k8serrors.IsNotFound(err) {
return reconcile.Result{}, nil
}
return reconcile.Result{}, err
}
return reconcile.Result{}, nil
}