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/
keycloakbackup_controller.go
197 lines (165 loc) · 6.42 KB
/
keycloakbackup_controller.go
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package keycloakbackup
import (
"context"
"fmt"
"time"
kc "github.com/keycloak/keycloak-operator/pkg/apis/keycloak/v1alpha1"
"github.com/keycloak/keycloak-operator/pkg/common"
"github.com/pkg/errors"
v1 "k8s.io/api/batch/v1"
"k8s.io/api/batch/v1beta1"
corev1 "k8s.io/api/core/v1"
kubeerrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
const (
RequeueDelay = 30 * time.Second
RequeueDelayError = 5 * time.Second
ControllerName = "keycloakbackup-controller"
)
var log = logf.Log.WithName("controller_keycloakbackup")
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
ctx := context.Background()
ctx, cancel := context.WithCancel(ctx)
return &ReconcileKeycloakBackup{
client: mgr.GetClient(),
scheme: mgr.GetScheme(),
cancel: cancel,
context: ctx,
recorder: mgr.GetEventRecorderFor(ControllerName),
}
}
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("keycloakbackup-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource KeycloakBackup
err = c.Watch(&source.Kind{Type: &kc.KeycloakBackup{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
if err := common.WatchSecondaryResource(c, ControllerName, common.JobKind, &v1.Job{}, &kc.KeycloakBackup{}); err != nil {
return err
}
if err := common.WatchSecondaryResource(c, ControllerName, common.CronJobKind, &v1beta1.CronJob{}, &kc.KeycloakBackup{}); err != nil {
return err
}
if err := common.WatchSecondaryResource(c, ControllerName, common.PersistentVolumeClaimKind, &corev1.PersistentVolumeClaim{}, &kc.KeycloakBackup{}); err != nil {
return err
}
return nil
}
// blank assignment to verify that ReconcileKeycloakBackup implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileKeycloakBackup{}
// ReconcileKeycloakBackup reconciles a KeycloakBackup object
type ReconcileKeycloakBackup struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
context context.Context
cancel context.CancelFunc
recorder record.EventRecorder
}
// Reconcile reads that state of the cluster for a KeycloakBackup object and makes changes based on the state read
func (r *ReconcileKeycloakBackup) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling KeycloakBackup")
// Fetch the KeycloakBackup instance
instance := &kc.KeycloakBackup{}
err := r.client.Get(context.TODO(), request.NamespacedName, instance)
if err != nil {
if kubeerrors.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
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
// If no selector is set we can't figure out which Keycloak instance this backup should
// be added for. Skip reconcile until a selector has been set.
if instance.Spec.InstanceSelector == nil {
log.Info(fmt.Sprintf("backup %v/%v has no instance selector and will be ignored", instance.Namespace, instance.Name))
return reconcile.Result{Requeue: false}, nil
}
keycloaks, err := common.GetMatchingKeycloaks(r.context, r.client, instance.Spec.InstanceSelector)
if err != nil {
return r.ManageError(instance, err)
}
// backups without instances to backup are treated as errors
if len(keycloaks.Items) == 0 {
return r.ManageError(instance, errors.Errorf("no instance to backup for %v/%v", instance.Namespace, instance.Name))
}
log.Info(fmt.Sprintf("found %v matching keycloak(s) for backup %v/%v", len(keycloaks.Items), instance.Namespace, instance.Name))
var currentState *common.BackupState
for _, keycloak := range keycloaks.Items {
if keycloak.Spec.Unmanaged {
return r.ManageError(instance, errors.Errorf("backups cannot be created for unmanaged keycloak instances"))
}
currentState = common.NewBackupState(keycloak)
err = currentState.Read(r.context, instance, r.client)
if err != nil {
return r.ManageError(instance, err)
}
reconciler := NewKeycloakBackupReconciler(keycloak)
desiredState := reconciler.Reconcile(currentState, instance)
actionRunner := common.NewClusterActionRunner(r.context, r.client, r.scheme, instance)
err = actionRunner.RunAll(desiredState)
if err != nil {
return r.ManageError(instance, err)
}
}
return r.ManageSuccess(instance, currentState)
}
func (r *ReconcileKeycloakBackup) ManageError(instance *kc.KeycloakBackup, issue error) (reconcile.Result, error) {
r.recorder.Event(instance, "Warning", "ProcessingError", issue.Error())
instance.Status.Message = issue.Error()
instance.Status.Ready = false
instance.Status.Phase = kc.BackupPhaseFailing
err := r.client.Status().Update(r.context, instance)
if err != nil {
log.Error(err, "unable to update status")
}
return reconcile.Result{
RequeueAfter: RequeueDelayError,
Requeue: true,
}, nil
}
func (r *ReconcileKeycloakBackup) ManageSuccess(instance *kc.KeycloakBackup, currentState *common.BackupState) (reconcile.Result, error) {
resourcesReady, err := currentState.IsResourcesReady()
if err != nil {
return r.ManageError(instance, err)
}
instance.Status.Ready = resourcesReady
instance.Status.Message = ""
if resourcesReady {
instance.Status.Phase = kc.BackupPhaseCreated
} else {
instance.Status.Phase = kc.BackupPhaseReconciling
}
err = r.client.Status().Update(r.context, instance)
if err != nil {
log.Error(err, "unable to update status")
return reconcile.Result{
RequeueAfter: RequeueDelayError,
Requeue: true,
}, nil
}
log.Info("desired cluster state met")
return reconcile.Result{RequeueAfter: RequeueDelay}, nil
}