Add initial version with help and admission controller (#1)

- It adds a helm chart that will be hosted in the Github pages URL of this repository - an admission controller operator - Basic documentation for installing the operator, configuring CRDs and example pod configuration
2026-09-13 18:59:09 +00:00 · 2025-01-29 22:44:09 +01:00
parent 50aa9ada37
commit 64091a6439
45 changed files with 4638 additions and 9 deletions
@@ -0,0 +1,156 @@
+/*
+Copyright 2025.
+
+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 controller
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/google/uuid"
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/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/handler"
+	"sigs.k8s.io/controller-runtime/pkg/log"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+
+	netbirdiov1 "github.com/netbirdio/kubernetes-operator/api/v1"
+)
+
+// NBSetupKeyReconciler reconciles a NBSetupKey object
+type NBSetupKeyReconciler struct {
+	client.Client
+	Scheme            *runtime.Scheme
+	ReferencedSecrets map[string]types.NamespacedName
+}
+
+// Reconcile is part of the main kubernetes reconciliation loop which aims to
+// move the current state of the cluster closer to the desired state.
+func (r *NBSetupKeyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+	_ = log.FromContext(ctx)
+
+	nbSetupKey := netbirdiov1.NBSetupKey{}
+	err := r.Get(ctx, req.NamespacedName, &nbSetupKey)
+	if err != nil {
+		ctrl.Log.Error(fmt.Errorf("internalError"), "error getting NBSetupKey", "err", err, "namespace", req.Namespace, "name", req.Name)
+		return ctrl.Result{}, nil
+	}
+
+	if nbSetupKey.Spec.SecretKeyRef.Name == "" || nbSetupKey.Spec.SecretKeyRef.Key == "" {
+		ctrl.Log.Error(fmt.Errorf("invalid NBSetupKey"), "secretKeyRef must contain both secret name and secret key", "namespace", req.Namespace, "name", req.Name)
+		return ctrl.Result{}, r.setStatus(ctx, &nbSetupKey, netbirdiov1.NBSetupKeyStatus{
+			Conditions: []netbirdiov1.NBSetupKeyCondition{
+				{
+					Type:          netbirdiov1.Ready,
+					Status:        corev1.ConditionFalse,
+					LastProbeTime: v1.Now(),
+					Reason:        "InvalidConfig",
+					Message:       "secretKeyRef must contain both secret name and secret key.",
+				},
+			},
+		})
+	}
+
+	// Handle updated secret name
+	for k, v := range r.ReferencedSecrets {
+		if v == req.NamespacedName {
+			delete(r.ReferencedSecrets, k)
+			break
+		}
+	}
+	r.ReferencedSecrets[fmt.Sprintf("%s/%s", nbSetupKey.Namespace, nbSetupKey.Spec.SecretKeyRef.Name)] = req.NamespacedName
+
+	secret := corev1.Secret{}
+	err = r.Get(ctx, types.NamespacedName{Namespace: nbSetupKey.Namespace, Name: nbSetupKey.Spec.SecretKeyRef.Name}, &secret)
+	if err != nil {
+		if !errors.IsNotFound(err) {
+			ctrl.Log.Error(fmt.Errorf("internalError"), "error getting secret", "err", err, "namespace", req.Namespace, "name", req.Name)
+			return ctrl.Result{}, err
+		}
+		ctrl.Log.Error(fmt.Errorf("invalid NBSetupKey"), "secret referenced not found", "err", err, "namespace", req.Namespace, "name", req.Name)
+		return ctrl.Result{}, r.setStatus(ctx, &nbSetupKey, netbirdiov1.NBSetupKeyStatus{Conditions: []netbirdiov1.NBSetupKeyCondition{{
+			Type:          netbirdiov1.Ready,
+			Status:        corev1.ConditionFalse,
+			LastProbeTime: v1.Now(),
+			Reason:        "SecretNotExists",
+			Message:       "Referenced secret does not exist",
+		}}})
+	}
+
+	uuidBytes, ok := secret.Data[nbSetupKey.Spec.SecretKeyRef.Key]
+	if !ok {
+		ctrl.Log.Error(fmt.Errorf("invalid NBSetupKey"), "secret key referenced not found", "namespace", req.Namespace, "name", req.Name)
+		return ctrl.Result{}, r.setStatus(ctx, &nbSetupKey, netbirdiov1.NBSetupKeyStatus{Conditions: []netbirdiov1.NBSetupKeyCondition{{
+			Type:          netbirdiov1.Ready,
+			Status:        corev1.ConditionFalse,
+			LastProbeTime: v1.Now(),
+			Reason:        "SecretKeyNotExists",
+			Message:       "Referenced secret key does not exist",
+		}}})
+	}
+
+	_, err = uuid.Parse(string(uuidBytes))
+	if err != nil {
+		ctrl.Log.Error(fmt.Errorf("invalid NBSetupKey"), "setupKey is not a valid UUID", "err", err, "namespace", req.Namespace, "name", req.Name)
+		return ctrl.Result{}, r.setStatus(ctx, &nbSetupKey, netbirdiov1.NBSetupKeyStatus{Conditions: []netbirdiov1.NBSetupKeyCondition{{
+			Type:          netbirdiov1.Ready,
+			Status:        corev1.ConditionFalse,
+			LastProbeTime: v1.Now(),
+			Reason:        "InvalidSetupKey",
+			Message:       "Referenced secret is not a valid SetupKey",
+		}}})
+	}
+	return ctrl.Result{}, r.setStatus(ctx, &nbSetupKey, netbirdiov1.NBSetupKeyStatus{Conditions: []netbirdiov1.NBSetupKeyCondition{{
+		Type:          netbirdiov1.Ready,
+		Status:        corev1.ConditionTrue,
+		LastProbeTime: v1.Now(),
+	}}})
+}
+
+func (r *NBSetupKeyReconciler) setStatus(ctx context.Context, nbsetupkey *netbirdiov1.NBSetupKey, status netbirdiov1.NBSetupKeyStatus) error {
+	nbsetupkey.Status = status
+	err := r.Status().Update(ctx, nbsetupkey)
+	return err
+}
+
+// SetupWithManager sets up the controller with the Manager.
+func (r *NBSetupKeyReconciler) SetupWithManager(mgr ctrl.Manager) error {
+	r.ReferencedSecrets = make(map[string]types.NamespacedName)
+
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&netbirdiov1.NBSetupKey{}).
+		Named("nbsetupkey").
+		Watches(
+			&corev1.Secret{},
+			handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []reconcile.Request {
+				if v, ok := r.ReferencedSecrets[fmt.Sprintf("%s/%s", obj.GetNamespace(), obj.GetName())]; ok {
+					return []reconcile.Request{
+						{
+							NamespacedName: v,
+						},
+					}
+				}
+
+				return nil
+			}),
+		). // Trigger reconciliation when the labeled Busybox resource changes
+		Complete(r)
+}