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opnicluster_controller.go
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/
opnicluster_controller.go
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/*
Copyright 2021.
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"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
v1beta1 "github.com/rancher/opni/api/v1beta1"
)
// OpniClusterReconciler reconciles a OpniCluster object
type OpniClusterReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
}
// +kubebuilder:rbac:groups=opni.io,resources=opniclusters,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=opni.io,resources=opniclusters/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=opni.io,resources=opniclusters/finalizers,verbs=update
// +kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=apps,resources=daemonsets,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=services,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=configmaps,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=secrets,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=pods,verbs=get;list;watch;create;update;patch;delete
func (r *OpniClusterReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
lg := r.Log.WithValues("opnicluster", req.NamespacedName)
// Ensure secrets are configured first
opniCluster := &v1beta1.OpniCluster{}
err := r.Get(ctx, req.NamespacedName, opniCluster)
if err != nil {
return ctrl.Result{}, client.IgnoreNotFound(err)
}
es := opniCluster.Spec.Elastic
// Check if the elasticsearch credentials secret exists
userSuppliedSecret := (es.Credentials.SecretRef != nil)
esCredentials := &corev1.Secret{}
if userSuppliedSecret {
// The user has their own secret, make sure it exists
ns := es.Credentials.SecretRef.Namespace
if ns == "" {
ns = opniCluster.Namespace
}
err = r.Get(ctx, types.NamespacedName{
Namespace: ns,
Name: es.Credentials.SecretRef.Name,
}, esCredentials)
if errors.IsNotFound(err) {
// The user's secret does not exist. Try again later
lg.Error(err, "secret not found", "secret", esSecret.Name)
return ctrl.Result{
RequeueAfter: 10 * time.Second,
}, err
}
} else {
// Use our own secret with the provided keys from the CR
if es.Credentials.Keys == nil {
lg.Error(err,
"either keys or a secret reference must be specified",
"field", "credentials",
)
// Do not requeue, the user has improperly configured the CR.
return ctrl.Result{}, nil
}
// Check if it exists first
err = r.Get(ctx, types.NamespacedName{
Namespace: opniCluster.Namespace,
Name: esSecret.Name,
}, esCredentials)
if errors.IsNotFound(err) {
// Keys are specified and the secret does not exist, create it now
esCredentials.StringData = map[string]string{
"username": es.Credentials.Keys.AccessKey,
"password": es.Credentials.Keys.SecretKey,
}
esCredentials.ObjectMeta.Name = esSecret.Name
esCredentials.ObjectMeta.Namespace = opniCluster.Namespace
if err := r.Create(ctx, esCredentials); err != nil {
lg.Error(err, "could not create secret", "secret", esSecret.Name)
return ctrl.Result{}, err
}
lg.Info("created secret", "secret", esSecret.Name)
return ctrl.Result{
Requeue: true,
}, nil
}
needsUpdate := false
// Check if the keys match
if string(esCredentials.Data["username"]) != es.Credentials.Keys.AccessKey {
needsUpdate = true
esCredentials.StringData["username"] = es.Credentials.Keys.AccessKey
}
if string(esCredentials.Data["password"]) != es.Credentials.Keys.SecretKey {
needsUpdate = true
esCredentials.StringData["password"] = es.Credentials.Keys.SecretKey
}
// If one or both keys do not match, update the secret and requeue
if needsUpdate {
return ctrl.Result{
Requeue: true,
}, r.Update(ctx, esCredentials)
}
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *OpniClusterReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&v1beta1.OpniCluster{}).
Owns(&appsv1.Deployment{}).
Owns(&corev1.Service{}).
Owns(&corev1.Secret{}).
Complete(r)
}