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

pkg/executor/executor.go

@@ -37,6 +37,7 @@ import (
 	"github.com/fission/fission/pkg/executor/executortype/newdeploy"
 	"github.com/fission/fission/pkg/executor/executortype/poolmgr"
 	"github.com/fission/fission/pkg/executor/fscache"
+	"github.com/fission/fission/pkg/executor/multitenant"
 	"github.com/fission/fission/pkg/executor/util"
 	fetcherConfig "github.com/fission/fission/pkg/fetcher/config"
 	"github.com/fission/fission/pkg/generated/clientset/versioned"
@@ -399,6 +400,12 @@ func StartExecutor(ctx context.Context, clientGen crd.ClientGeneratorInterface,
 
 	utils.CreateMissingPermissionForSA(ctx, kubernetesClient, logger)
 
+	// Start multi-tenant Namespace watcher.
+	// Detects Namespaces labeled fission.io/managed=true and registers them in all
+	// executor types without a pod restart. Backward-compatible with FISSION_RESOURCE_NAMESPACES.
+	// See: pkg/executor/multitenant/ns_watcher.go
+	multitenant.StartNSWatcher(ctx, logger, kubernetesClient, executorTypes, mgr)
+
 	mgr.Add(ctx, func(ctx context.Context) {
 		metrics.ServeMetrics(ctx, "executor", logger, mgr)
 	})