Add LeaderElectionID config flag (#118)

* Add LeaderElectionID config flag

* Remove ControllerManagerConfig

config/default/kustomization.yaml

@@ -45,8 +45,7 @@ patchesStrategicMerge:
   - manager_auth_proxy_patch.yaml
 
   # Mount the controller config file for loading manager configurations
-  # through a ComponentConfig type
-  #- manager_config_patch.yaml
+  - manager_config_patch.yaml
 
   # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in
   # crd/kustomization.yaml

config/default/manager_auth_proxy_patch.yaml

@@ -33,9 +33,3 @@ spec:
           ports:
             - containerPort: 8443
               name: https
-        - name: manager
-          args:
-            - "--metrics-addr=127.0.0.1:8080"
-            - "--watch-namespace="
-            # - "--enable-leader-election"
-            # - "--health-probe-bind-address=:8081"

config/default/manager_config_patch.yaml

@@ -7,14 +7,7 @@ spec:
   template:
     spec:
       containers:
-      - name: manager
-        args:
-        - "--config=controller_manager_config.yaml"
-        volumeMounts:
-        - name: manager-config
-          mountPath: /controller_manager_config.yaml
-          subPath: controller_manager_config.yaml
-      volumes:
-      - name: manager-config
-        configMap:
-          name: manager-config
+        - name: manager
+          args:
+            - "--metrics-addr=127.0.0.1:8080"
+            - "--enable-leader-election"

config/manager/kustomization.yaml

@@ -18,11 +18,6 @@ resources:
 generatorOptions:
   disableNameSuffixHash: true
 
-configMapGenerator:
-  - files:
-      - controller_manager_config.yaml
-    name: manager-config
-
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 images:

main.go

@@ -50,11 +50,14 @@ func init() {
 
 func main() {
 	var metricsAddr string
-	var enableLeaderElection bool
 	var watchNamespace string
+	var enableLeaderElection bool
+	var leaderElectionID string
 	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
 	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.StringVar(&leaderElectionID, "leader-election-id", "flink-operator-lock",
+		"The name that leader election will use for holding the leader lock")
 	flag.StringVar(
 		&watchNamespace,
 		"watch-namespace",
@@ -74,6 +77,7 @@ func main() {
 		MetricsBindAddress: metricsAddr,
 		LeaderElection:     enableLeaderElection,
 		Namespace:          watchNamespace,
+		LeaderElectionID:   leaderElectionID,
 	})
 	if err != nil {
 		setupLog.Error(err, "Unable to start manager")