multi-tenant: EnsureNamespaceSA + ns_watcher SA provisioning (v8)

pkg/buildermgr/envwatcher.go

@@ -39,6 +39,7 @@ import (
 	"github.com/fission/fission/pkg/executor/util"
 	fetcherConfig "github.com/fission/fission/pkg/fetcher/config"
 	"github.com/fission/fission/pkg/generated/clientset/versioned"
+	genInformer "github.com/fission/fission/pkg/generated/informers/externalversions"
 	"github.com/fission/fission/pkg/utils"
 	"github.com/fission/fission/pkg/utils/manager"
 )
@@ -498,3 +499,47 @@ func (envw *environmentWatcher) createBuilderDeployment(ctx context.Context, env
 
 	return deployment, nil
 }
+
+// AddNamespace dynamically registers a new namespace in environmentWatcher.
+// Creates a per-NS Environment informer. Safe to call repeatedly — deduplicates via nsResolver.
+func (envw *environmentWatcher) AddNamespace(ctx context.Context, ns string, mgr manager.Interface) {
+	if !envw.nsResolver.AddNamespace(ns) {
+		return // already registered
+	}
+	envw.logger.Info("buildermgr.envWatcher.AddNamespace: setting up informer", zap.String("namespace", ns))
+
+	factory := genInformer.NewFilteredSharedInformerFactory(envw.fissionClient, 30*time.Minute, ns, nil)
+	envInf := factory.Core().V1().Environments().Informer()
+
+	_, err := envInf.AddEventHandler(k8sCache.ResourceEventHandlerFuncs{
+		AddFunc: func(obj interface{}) {
+			envObj := obj.(*fv1.Environment)
+			envw.AddUpdateBuilder(ctx, envObj)
+		},
+		UpdateFunc: func(oldObj interface{}, newObj interface{}) {
+			oldEnvObj := oldObj.(*fv1.Environment)
+			newEnvObj := newObj.(*fv1.Environment)
+			if oldEnvObj.ResourceVersion == newEnvObj.ResourceVersion {
+				return
+			}
+			envw.AddUpdateBuilder(ctx, newEnvObj)
+		},
+		DeleteFunc: func(obj interface{}) {
+			envObj, ok := obj.(*fv1.Environment)
+			if !ok {
+				return
+			}
+			envw.DeleteBuilder(ctx, envObj)
+		},
+	})
+	if err != nil {
+		envw.logger.Error("buildermgr.envWatcher.AddNamespace: add handler failed",
+			zap.String("namespace", ns), zap.Error(fmt.Errorf("%w", err)))
+		return
+	}
+
+	envw.envWatchInformer[ns] = envInf
+	mgr.AddInformers(ctx, map[string]k8sCache.SharedIndexInformer{ns: envInf})
+	factory.Start(ctx.Done())
+	envw.logger.Info("buildermgr.envWatcher.AddNamespace: done", zap.String("namespace", ns))
+}