Remove redundant flags from webhook-based autoscaler (#1630)

* Remove redundant flags from webhook-based autoscaler

Ref #623

* fixup! Remove redundant flags from webhook-based autoscaler

charts/actions-runner-controller/README.md

@@ -78,7 +78,6 @@ All additional docs are kept in the `docs/` folder, this README is solely for do
 | `githubWebhookServer.logLevel`                           | Set the log level of the githubWebhookServer container                                                                     |                                                                      |
 | `githubWebhookServer.replicaCount`                       | Set the number of webhook server pods                                                                                      | 1                                                                    |
 | `githubWebhookServer.useRunnerGroupsVisibility`          | Enable supporting runner groups with custom visibility. This will incur in extra API calls and may blow up your budget. Currently, you also need to set `githubWebhookServer.secret.enabled` to enable this feature. | false                                                                |
-| `githubWebhookServer.syncPeriod`                         | Set the period in which the controller reconciles the resources                                                            | 10m                                                                  |
 | `githubWebhookServer.enabled`                            | Deploy the webhook server pod                                                                                              | false                                                                |
 | `githubWebhookServer.secret.enabled`                      | Passes the webhook hook secret to the github-webhook-server                                                                             | false                                                                |
 | `githubWebhookServer.secret.create`                      | Deploy the webhook hook secret                                                                                             | false                                                                |

charts/actions-runner-controller/templates/githubwebhook.deployment.yaml

@@ -39,7 +39,6 @@ spec:
         {{- $metricsHost := .Values.metrics.proxy.enabled | ternary "127.0.0.1" "0.0.0.0" }}
         {{- $metricsPort := .Values.metrics.proxy.enabled | ternary "8080" .Values.metrics.port }}
         - "--metrics-addr={{ $metricsHost }}:{{ $metricsPort }}"
-        - "--sync-period={{ .Values.githubWebhookServer.syncPeriod }}"
         {{- if .Values.githubWebhookServer.logLevel }}
         - "--log-level={{ .Values.githubWebhookServer.logLevel }}"
         {{- end }}

charts/actions-runner-controller/values.yaml

@@ -192,7 +192,6 @@ admissionWebHooks:
 githubWebhookServer:
   enabled: false
   replicaCount: 1
-  syncPeriod: 10m
   useRunnerGroupsVisibility: false
   secret:
     enabled: false

cmd/githubwebhookserver/main.go

@@ -69,10 +69,8 @@ func main() {
 
 		watchNamespace string
 
-		enableLeaderElection bool
-		syncPeriod           time.Duration
-		logLevel             string
-		queueLimit           int
+		logLevel   string
+		queueLimit int
 
 		ghClient *github.Client
 	)
@@ -89,9 +87,6 @@ func main() {
 	flag.StringVar(&webhookAddr, "webhook-addr", ":8000", "The address the metric endpoint binds to.")
 	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
 	flag.StringVar(&watchNamespace, "watch-namespace", "", "The namespace to watch for HorizontalRunnerAutoscaler's to scale on Webhook. Set to empty for letting it watch for all namespaces.")
-	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
-		"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
-	flag.DurationVar(&syncPeriod, "sync-period", 10*time.Minute, "Determines the minimum frequency at which K8s resources managed by this controller are reconciled. When you use autoscaling, set to a lower value like 10 minute, because this corresponds to the minimum time to react on demand change")
 	flag.StringVar(&logLevel, "log-level", logging.LogLevelDebug, `The verbosity of the logging. Valid values are "debug", "info", "warn", "error". Defaults to "debug".`)
 	flag.IntVar(&queueLimit, "queue-limit", controllers.DefaultQueueLimit, `The maximum length of the scale operation queue. The scale opration is enqueued per every matching webhook event, and the server returns a 500 HTTP status when the queue was already full on enqueue attempt.`)
 	flag.StringVar(&webhookSecretToken, "github-webhook-secret-token", "", "The personal access token of GitHub.")
@@ -144,10 +139,10 @@ func main() {
 		setupLog.Info("GitHub client is not initialized. Runner groups with custom visibility are not supported. If needed, please provide GitHub authentication. This will incur in extra GitHub API calls")
 	}
 
+	syncPeriod := 10 * time.Minute
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
 		Scheme:             scheme,
 		SyncPeriod:         &syncPeriod,
-		LeaderElection:     enableLeaderElection,
 		Namespace:          watchNamespace,
 		MetricsBindAddress: metricsAddr,
 		Port:               9443,