/
certinjection_controller.go
168 lines (140 loc) · 5.32 KB
/
certinjection_controller.go
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/*
Copyright 2022 szou.
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"
"github.com/szlabs/harbor-cert-injector/api/v1alpha1"
"github.com/szlabs/harbor-cert-injector/pkg/cert/injector"
"github.com/szlabs/harbor-cert-injector/pkg/controller"
mytypes "github.com/szlabs/harbor-cert-injector/pkg/types"
appv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
)
// CertInjectionReconciler reconciles a CertInjection object
type CertInjectionReconciler struct {
client.Client
Scheme *runtime.Scheme
}
//+kubebuilder:rbac:groups=day2-operations.goharbor.io,resources=certinjections,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=day2-operations.goharbor.io,resources=certinjections/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=day2-operations.goharbor.io,resources=certinjections/finalizers,verbs=update
//+kubebuilder:rbac:groups=apps,resources=daemonsets,verbs=get;list;watch;create;update;patch;delete
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.11.0/pkg/reconcile
func (r *CertInjectionReconciler) Reconcile(ctx context.Context, req ctrl.Request) (res ctrl.Result, e error) {
logger := log.FromContext(ctx)
logger.WithValues("cert injection", req.NamespacedName)
logger.Info("Start reconcile loop")
certInjection := &v1alpha1.CertInjection{}
if err := r.Get(ctx, req.NamespacedName, certInjection); err != nil {
logger.Error(err, "unable to fetch cert injection")
return ctrl.Result{}, client.IgnoreNotFound(err)
}
if !certInjection.GetObjectMeta().GetDeletionTimestamp().IsZero() {
logger.Info("object is being deleted")
return ctrl.Result{}, nil
}
// Check whether the secret containing the CA content has been ready.
caSecret := &corev1.Secret{}
if err := r.Get(ctx, types.NamespacedName{
Namespace: req.Namespace,
Name: certInjection.Spec.CertSecret.Name,
}, caSecret); err != nil {
logger.Error(err, "get CA cert secret error")
return ctrl.Result{}, err
}
// Check the existence of the underlying daemon set.
dsList := &appv1.DaemonSetList{}
if err := r.List(ctx, dsList, client.InNamespace(req.Namespace), client.MatchingLabels{
mytypes.OwnerGVKLabel: controller.FormatGVKToLabelValue(certInjection.GetObjectKind().GroupVersionKind()),
mytypes.OwnerNameLabel: certInjection.GetName(),
}); err != nil {
logger.Error(err, "list the underlying ds resources")
return ctrl.Result{}, err
}
// Add defer to update the status
defer func() {
st := corev1.ConditionTrue
if e != nil {
st = corev1.ConditionFalse
}
found, updated := false, false
for _, c := range certInjection.Status.Conditions {
if c.Type == mytypes.ConditionReady {
found = true
if c.Status != st {
c.Status = st
updated = true
}
}
}
if !found {
certInjection.Status.Conditions = append(certInjection.Status.Conditions, v1alpha1.CertInjectionCondition{
Type: mytypes.ConditionReady,
Status: st,
})
}
if !found || updated {
if err := r.Status().Update(ctx, certInjection); err != nil {
logger.Error(err, "update status error")
return
}
}
}()
ijp := injector.NewDaemonSetProvider(r.Client, r.Scheme)
if len(dsList.Items) == 0 {
logger.Info("Underlying ds not found and create new")
// Not found then create.
if err := ijp.Inject(ctx, certInjection); err != nil {
logger.Error(err, "inject CA cert error")
return ctrl.Result{}, err
}
} else {
ds := &dsList.Items[0]
oldInjectionV := ds.GetAnnotations()[mytypes.InjectionVersionAnnotationKey]
newInjectionV := certInjection.GetResourceVersion()
// If update is needed.
if oldInjectionV != newInjectionV {
logger.Info("Cert injection resource version changes found", "old", oldInjectionV, "new", newInjectionV)
updatedDs := ijp.DesiredInjector(certInjection)
ds.Spec = *updatedDs.Spec.DeepCopy()
ds.Annotations[mytypes.InjectionVersionAnnotationKey] = newInjectionV
if err := r.Update(ctx, ds); err != nil {
logger.Error(err, "update the underlying ds")
return ctrl.Result{}, err
}
}
}
logger.Info("Reconcile loop completed")
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *CertInjectionReconciler) SetupWithManager(mgr ctrl.Manager) error {
r.Client = mgr.GetClient()
r.Scheme = mgr.GetScheme()
return ctrl.NewControllerManagedBy(mgr).
For(&v1alpha1.CertInjection{}).
Owns(&appv1.DaemonSet{}).
Complete(r)
}
func init() {
controller.AddToControllerList(&CertInjectionReconciler{})
}