feat: allow running only analysis controller

Signed-off-by: Soumya Ghosh Dastidar <[email protected]>

cmd/rollouts-controller/main.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/argoproj/argo-rollouts/utils/record"
-
 	"github.com/argoproj/pkg/kubeclientmetrics"
 	smiclientset "github.com/servicemeshinterface/smi-sdk-go/pkg/gen/client/split/clientset/versioned"
 	log "github.com/sirupsen/logrus"
@@ -72,6 +71,7 @@ func newCommand() *cobra.Command {
 		namespaced                     bool
 		printVersion                   bool
 		selfServiceNotificationEnabled bool
+		onlyAnalysisMode               bool
 	)
 	electOpts := controller.NewLeaderElectionOptions()
 	var command = cobra.Command{
@@ -185,41 +185,63 @@ func newCommand() *cobra.Command {
 			ingressWrapper, err := ingressutil.NewIngressWrapper(mode, kubeClient, kubeInformerFactory)
 			checkError(err)
 
-			cm := controller.NewManager(
-				namespace,
-				kubeClient,
-				argoprojClient,
-				dynamicClient,
-				smiClient,
-				discoveryClient,
-				kubeInformerFactory.Apps().V1().ReplicaSets(),
-				kubeInformerFactory.Core().V1().Services(),
-				ingressWrapper,
-				jobInformerFactory.Batch().V1().Jobs(),
-				tolerantinformer.NewTolerantRolloutInformer(dynamicInformerFactory),
-				tolerantinformer.NewTolerantExperimentInformer(dynamicInformerFactory),
-				tolerantinformer.NewTolerantAnalysisRunInformer(dynamicInformerFactory),
-				tolerantinformer.NewTolerantAnalysisTemplateInformer(dynamicInformerFactory),
-				tolerantinformer.NewTolerantClusterAnalysisTemplateInformer(clusterDynamicInformerFactory),
-				istioPrimaryDynamicClient,
-				istioDynamicInformerFactory.ForResource(istioutil.GetIstioVirtualServiceGVR()).Informer(),
-				istioDynamicInformerFactory.ForResource(istioutil.GetIstioDestinationRuleGVR()).Informer(),
-				notificationConfigMapInformerFactory,
-				notificationSecretInformerFactory,
-				resyncDuration,
-				instanceID,
-				metricsPort,
-				healthzPort,
-				k8sRequestProvider,
-				nginxIngressClasses,
-				albIngressClasses,
-				dynamicInformerFactory,
-				clusterDynamicInformerFactory,
-				istioDynamicInformerFactory,
-				namespaced,
-				kubeInformerFactory,
-				jobInformerFactory)
+			var cm *controller.Manager
 
+			if onlyAnalysisMode {
+				log.Info("Running only analysis controller")
+				cm = controller.NewAnalysisManager(
+					namespace,
+					kubeClient,
+					argoprojClient,
+					jobInformerFactory.Batch().V1().Jobs(),
+					tolerantinformer.NewTolerantAnalysisRunInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantAnalysisTemplateInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantClusterAnalysisTemplateInformer(clusterDynamicInformerFactory),
+					resyncDuration,
+					metricsPort,
+					healthzPort,
+					k8sRequestProvider,
+					dynamicInformerFactory,
+					clusterDynamicInformerFactory,
+					namespaced,
+					kubeInformerFactory,
+					jobInformerFactory)
+			} else {
+				cm = controller.NewManager(
+					namespace,
+					kubeClient,
+					argoprojClient,
+					dynamicClient,
+					smiClient,
+					discoveryClient,
+					kubeInformerFactory.Apps().V1().ReplicaSets(),
+					kubeInformerFactory.Core().V1().Services(),
+					ingressWrapper,
+					jobInformerFactory.Batch().V1().Jobs(),
+					tolerantinformer.NewTolerantRolloutInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantExperimentInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantAnalysisRunInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantAnalysisTemplateInformer(dynamicInformerFactory),
+					tolerantinformer.NewTolerantClusterAnalysisTemplateInformer(clusterDynamicInformerFactory),
+					istioPrimaryDynamicClient,
+					istioDynamicInformerFactory.ForResource(istioutil.GetIstioVirtualServiceGVR()).Informer(),
+					istioDynamicInformerFactory.ForResource(istioutil.GetIstioDestinationRuleGVR()).Informer(),
+					notificationConfigMapInformerFactory,
+					notificationSecretInformerFactory,
+					resyncDuration,
+					instanceID,
+					metricsPort,
+					healthzPort,
+					k8sRequestProvider,
+					nginxIngressClasses,
+					albIngressClasses,
+					dynamicInformerFactory,
+					clusterDynamicInformerFactory,
+					istioDynamicInformerFactory,
+					namespaced,
+					kubeInformerFactory,
+					jobInformerFactory)
+			}
 			if err = cm.Run(ctx, rolloutThreads, serviceThreads, ingressThreads, experimentThreads, analysisThreads, electOpts); err != nil {
 				log.Fatalf("Error running controller: %s", err.Error())
 			}
@@ -262,6 +284,7 @@ func newCommand() *cobra.Command {
 	command.Flags().DurationVar(&electOpts.LeaderElectionRenewDeadline, "leader-election-renew-deadline", controller.DefaultLeaderElectionRenewDeadline, "The interval between attempts by the acting master to renew a leadership slot before it stops leading. This must be less than or equal to the lease duration. This is only applicable if leader election is enabled.")
 	command.Flags().DurationVar(&electOpts.LeaderElectionRetryPeriod, "leader-election-retry-period", controller.DefaultLeaderElectionRetryPeriod, "The duration the clients should wait between attempting acquisition and renewal of a leadership. This is only applicable if leader election is enabled.")
 	command.Flags().BoolVar(&selfServiceNotificationEnabled, "self-service-notification-enabled", false, "Allows rollouts controller to pull notification config from the namespace that the rollout resource is in. This is useful for self-service notification.")
+	command.Flags().BoolVar(&onlyAnalysisMode, "only-analysis-mode", false, "Only runs analysis controller")
 	return &command
 }
 

controller/controller.go

@@ -163,6 +163,87 @@ type Manager struct {
 	notificationSecretInformerFactory    kubeinformers.SharedInformerFactory
 	jobInformerFactory                   kubeinformers.SharedInformerFactory
 	istioPrimaryDynamicClient            dynamic.Interface
+
+	onlyAnalysisMode bool
+}
+
+func NewAnalysisManager(
+	namespace string,
+	kubeclientset kubernetes.Interface,
+	argoprojclientset clientset.Interface,
+	jobInformer batchinformers.JobInformer,
+	analysisRunInformer informers.AnalysisRunInformer,
+	analysisTemplateInformer informers.AnalysisTemplateInformer,
+	clusterAnalysisTemplateInformer informers.ClusterAnalysisTemplateInformer,
+	resyncPeriod time.Duration,
+	metricsPort int,
+	healthzPort int,
+	k8sRequestProvider *metrics.K8sRequestsCountProvider,
+	dynamicInformerFactory dynamicinformer.DynamicSharedInformerFactory,
+	clusterDynamicInformerFactory dynamicinformer.DynamicSharedInformerFactory,
+	namespaced bool,
+	kubeInformerFactory kubeinformers.SharedInformerFactory,
+	jobInformerFactory kubeinformers.SharedInformerFactory,
+) *Manager {
+	runtime.Must(rolloutscheme.AddToScheme(scheme.Scheme))
+	log.Info("Creating event broadcaster")
+
+	metricsAddr := fmt.Sprintf(listenAddr, metricsPort)
+	metricsServer := metrics.NewMetricsServer(metrics.ServerConfig{
+		Addr:                          metricsAddr,
+		RolloutLister:                 nil,
+		AnalysisRunLister:             analysisRunInformer.Lister(),
+		AnalysisTemplateLister:        analysisTemplateInformer.Lister(),
+		ClusterAnalysisTemplateLister: clusterAnalysisTemplateInformer.Lister(),
+		ExperimentLister:              nil,
+		K8SRequestProvider:            k8sRequestProvider,
+	})
+
+	healthzServer := NewHealthzServer(fmt.Sprintf(listenAddr, healthzPort))
+	analysisRunWorkqueue := workqueue.NewNamedRateLimitingQueue(queue.DefaultArgoRolloutsRateLimiter(), "AnalysisRuns")
+	recorder := record.NewEventRecorder(kubeclientset, metrics.MetricRolloutEventsTotal, metrics.MetricNotificationFailedTotal, metrics.MetricNotificationSuccessTotal, metrics.MetricNotificationSend, nil)
+	analysisController := analysis.NewController(analysis.ControllerConfig{
+		KubeClientSet:        kubeclientset,
+		ArgoProjClientset:    argoprojclientset,
+		AnalysisRunInformer:  analysisRunInformer,
+		JobInformer:          jobInformer,
+		ResyncPeriod:         resyncPeriod,
+		AnalysisRunWorkQueue: analysisRunWorkqueue,
+		MetricsServer:        metricsServer,
+		Recorder:             recorder,
+	})
+
+	cm := &Manager{
+		wg:                            &sync.WaitGroup{},
+		metricsServer:                 metricsServer,
+		healthzServer:                 healthzServer,
+		jobSynced:                     jobInformer.Informer().HasSynced,
+		analysisRunSynced:             analysisRunInformer.Informer().HasSynced,
+		analysisTemplateSynced:        analysisTemplateInformer.Informer().HasSynced,
+		clusterAnalysisTemplateSynced: clusterAnalysisTemplateInformer.Informer().HasSynced,
+		analysisRunWorkqueue:          analysisRunWorkqueue,
+		analysisController:            analysisController,
+		namespace:                     namespace,
+		kubeClientSet:                 kubeclientset,
+		dynamicInformerFactory:        dynamicInformerFactory,
+		clusterDynamicInformerFactory: clusterDynamicInformerFactory,
+		namespaced:                    namespaced,
+		kubeInformerFactory:           kubeInformerFactory,
+		jobInformerFactory:            jobInformerFactory,
+		onlyAnalysisMode:              true,
+	}
+
+	_, err := rolloutsConfig.InitializeConfig(kubeclientset, defaults.DefaultRolloutsConfigMapName)
+	if err != nil {
+		log.Fatalf("Failed to init config: %v", err)
+	}
+
+	err = plugin.DownloadPlugins(plugin.FileDownloaderImpl{})
+	if err != nil {
+		log.Fatalf("Failed to download plugins: %v", err)
+	}
+
+	return cm
 }
 
 // NewManager returns a new manager to manage all the controllers
@@ -441,11 +522,13 @@ func (c *Manager) Run(ctx context.Context, rolloutThreadiness, serviceThreadines
 	log.Info("Shutting down workers")
 	goPlugin.CleanupClients()
 
-	c.serviceWorkqueue.ShutDownWithDrain()
-	c.ingressWorkqueue.ShutDownWithDrain()
-	c.rolloutWorkqueue.ShutDownWithDrain()
-	c.experimentWorkqueue.ShutDownWithDrain()
-	c.analysisRunWorkqueue.ShutDownWithDrain()
+	if !c.onlyAnalysisMode {
+		c.serviceWorkqueue.ShutDownWithDrain()
+		c.ingressWorkqueue.ShutDownWithDrain()
+		c.rolloutWorkqueue.ShutDownWithDrain()
+		c.experimentWorkqueue.ShutDownWithDrain()
+	}
+
 	c.analysisRunWorkqueue.ShutDownWithDrain()
 
 	ctxWithTimeout, cancel := context.WithTimeout(ctx, 5*time.Second) // give max of 10 seconds for http servers to shut down
@@ -463,12 +546,6 @@ func (c *Manager) startLeading(ctx context.Context, rolloutThreadiness, serviceT
 	// Start the informer factories to begin populating the informer caches
 	log.Info("Starting Controllers")
 
-	c.notificationConfigMapInformerFactory.Start(ctx.Done())
-	c.notificationSecretInformerFactory.Start(ctx.Done())
-	if ok := cache.WaitForCacheSync(ctx.Done(), c.configMapSynced, c.secretSynced); !ok {
-		log.Fatalf("failed to wait for configmap/secret caches to sync, exiting")
-	}
-
 	// notice that there is no need to run Start methods in a separate goroutine. (i.e. go kubeInformerFactory.Start(stopCh)
 	// Start method is non-blocking and runs all registered informers in a dedicated goroutine.
 	c.dynamicInformerFactory.Start(ctx.Done())
@@ -479,29 +556,50 @@ func (c *Manager) startLeading(ctx context.Context, rolloutThreadiness, serviceT
 
 	c.jobInformerFactory.Start(ctx.Done())
 
-	// Check if Istio installed on cluster before starting dynamicInformerFactory
-	if istioutil.DoesIstioExist(c.istioPrimaryDynamicClient, c.namespace) {
-		c.istioDynamicInformerFactory.Start(ctx.Done())
-	}
+	if c.onlyAnalysisMode {
+		log.Info("Waiting for controller's informer caches to sync")
+		if ok := cache.WaitForCacheSync(ctx.Done(), c.analysisRunSynced, c.analysisTemplateSynced, c.jobSynced); !ok {
+			log.Fatalf("failed to wait for caches to sync, exiting")
+		}
+		// only wait for cluster scoped informers to sync if we are running in cluster-wide mode
+		if c.namespace == metav1.NamespaceAll {
+			if ok := cache.WaitForCacheSync(ctx.Done(), c.clusterAnalysisTemplateSynced); !ok {
+				log.Fatalf("failed to wait for cluster-scoped caches to sync, exiting")
+			}
+		}
+		go wait.Until(func() { c.wg.Add(1); c.analysisController.Run(ctx, analysisThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+	} else {
 
-	// Wait for the caches to be synced before starting workers
-	log.Info("Waiting for controller's informer caches to sync")
-	if ok := cache.WaitForCacheSync(ctx.Done(), c.serviceSynced, c.ingressSynced, c.jobSynced, c.rolloutSynced, c.experimentSynced, c.analysisRunSynced, c.analysisTemplateSynced, c.replicasSetSynced, c.configMapSynced, c.secretSynced); !ok {
-		log.Fatalf("failed to wait for caches to sync, exiting")
-	}
-	// only wait for cluster scoped informers to sync if we are running in cluster-wide mode
-	if c.namespace == metav1.NamespaceAll {
-		if ok := cache.WaitForCacheSync(ctx.Done(), c.clusterAnalysisTemplateSynced); !ok {
-			log.Fatalf("failed to wait for cluster-scoped caches to sync, exiting")
+		c.notificationConfigMapInformerFactory.Start(ctx.Done())
+		c.notificationSecretInformerFactory.Start(ctx.Done())
+		if ok := cache.WaitForCacheSync(ctx.Done(), c.configMapSynced, c.secretSynced); !ok {
+			log.Fatalf("failed to wait for configmap/secret caches to sync, exiting")
 		}
-	}
 
-	go wait.Until(func() { c.wg.Add(1); c.rolloutController.Run(ctx, rolloutThreadiness); c.wg.Done() }, time.Second, ctx.Done())
-	go wait.Until(func() { c.wg.Add(1); c.serviceController.Run(ctx, serviceThreadiness); c.wg.Done() }, time.Second, ctx.Done())
-	go wait.Until(func() { c.wg.Add(1); c.ingressController.Run(ctx, ingressThreadiness); c.wg.Done() }, time.Second, ctx.Done())
-	go wait.Until(func() { c.wg.Add(1); c.experimentController.Run(ctx, experimentThreadiness); c.wg.Done() }, time.Second, ctx.Done())
-	go wait.Until(func() { c.wg.Add(1); c.analysisController.Run(ctx, analysisThreadiness); c.wg.Done() }, time.Second, ctx.Done())
-	go wait.Until(func() { c.wg.Add(1); c.notificationsController.Run(rolloutThreadiness, ctx.Done()); c.wg.Done() }, time.Second, ctx.Done())
+		// Check if Istio installed on cluster before starting dynamicInformerFactory
+		if istioutil.DoesIstioExist(c.istioPrimaryDynamicClient, c.namespace) {
+			c.istioDynamicInformerFactory.Start(ctx.Done())
+		}
 
+		// Wait for the caches to be synced before starting workers
+		log.Info("Waiting for controller's informer caches to sync")
+		if ok := cache.WaitForCacheSync(ctx.Done(), c.serviceSynced, c.ingressSynced, c.jobSynced, c.rolloutSynced, c.experimentSynced, c.analysisRunSynced, c.analysisTemplateSynced, c.replicasSetSynced, c.configMapSynced, c.secretSynced); !ok {
+			log.Fatalf("failed to wait for caches to sync, exiting")
+		}
+		// only wait for cluster scoped informers to sync if we are running in cluster-wide mode
+		if c.namespace == metav1.NamespaceAll {
+			if ok := cache.WaitForCacheSync(ctx.Done(), c.clusterAnalysisTemplateSynced); !ok {
+				log.Fatalf("failed to wait for cluster-scoped caches to sync, exiting")
+			}
+		}
+
+		go wait.Until(func() { c.wg.Add(1); c.rolloutController.Run(ctx, rolloutThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+		go wait.Until(func() { c.wg.Add(1); c.serviceController.Run(ctx, serviceThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+		go wait.Until(func() { c.wg.Add(1); c.ingressController.Run(ctx, ingressThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+		go wait.Until(func() { c.wg.Add(1); c.experimentController.Run(ctx, experimentThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+		go wait.Until(func() { c.wg.Add(1); c.analysisController.Run(ctx, analysisThreadiness); c.wg.Done() }, time.Second, ctx.Done())
+		go wait.Until(func() { c.wg.Add(1); c.notificationsController.Run(rolloutThreadiness, ctx.Done()); c.wg.Done() }, time.Second, ctx.Done())
+
+	}
 	log.Info("Started controller")
 }

controller/metrics/metrics.go

@@ -55,9 +55,13 @@ func NewMetricsServer(cfg ServerConfig) *MetricsServer {
 
 	reg := prometheus.NewRegistry()
 
-	reg.MustRegister(NewRolloutCollector(cfg.RolloutLister))
+	if cfg.RolloutLister != nil {
+		reg.MustRegister(NewRolloutCollector(cfg.RolloutLister))
+	}
+	if cfg.ExperimentLister != nil {
+		reg.MustRegister(NewExperimentCollector(cfg.ExperimentLister))
+	}
 	reg.MustRegister(NewAnalysisRunCollector(cfg.AnalysisRunLister, cfg.AnalysisTemplateLister, cfg.ClusterAnalysisTemplateLister))
-	reg.MustRegister(NewExperimentCollector(cfg.ExperimentLister))
 	cfg.K8SRequestProvider.MustRegister(reg)
 	reg.MustRegister(MetricRolloutReconcile)
 	reg.MustRegister(MetricRolloutReconcileError)

go.mod

@@ -1,6 +1,8 @@
 module github.com/argoproj/argo-rollouts
 
-go 1.20
+go 1.21
+
+toolchain go1.21.3
 
 require (
 	github.com/antonmedv/expr v1.15.5