use component config for default setup (kubernetes-sigs#724)

Author: kannon92

config/components/manager/controller_manager_config.yaml

@@ -0,0 +1,5 @@
+
+apiVersion: config.jobset.x-k8s.io/v1alpha1
+kind: Configuration
+leaderElection:
+  leaderElect: true

config/components/manager/kustomization.yaml

@@ -1,6 +1,14 @@
 resources:
 - manager.yaml
 
+generatorOptions:
+  disableNameSuffixHash: true
+
+configMapGenerator:
+- files:
+  - controller_manager_config.yaml
+  name: manager-config
+
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 images:

config/default/manager_config_patch.yaml

@@ -9,7 +9,13 @@ spec:
       containers:
       - name: manager
         args:
+        - "--config=/controller_manager_config.yaml"
         - "--zap-log-level=2"
-        - "--health-probe-bind-address=:8081"
-        - "--metrics-bind-address=:8443"
-        - "--leader-elect"
+        volumeMounts:
+        - name: manager-config
+          mountPath: /controller_manager_config.yaml
+          subPath: controller_manager_config.yaml
+      volumes:
+      - name: manager-config
+        configMap:
+          name: manager-config

main.go

@@ -116,18 +116,32 @@ func main() {
 
 	if flagsSet["metrics-bind-address"] {
 		options.Metrics.BindAddress = metricsAddr
+	} else {
+		options.Metrics.BindAddress = cfg.Metrics.BindAddress
 	}
+
 	if flagsSet["health-probe-bind-address"] {
 		options.HealthProbeBindAddress = probeAddr
+	} else {
+		options.HealthProbeBindAddress = cfg.Health.HealthProbeBindAddress
 	}
+
 	if flagsSet["leader-elect"] {
 		options.LeaderElection = enableLeaderElection
+	} else {
+		options.LeaderElection = *cfg.LeaderElection.LeaderElect
 	}
+
 	if flagsSet["kube-api-qps"] {
 		kubeConfig.QPS = float32(qps)
+	} else {
+		kubeConfig.QPS = *cfg.ClientConnection.QPS
 	}
+
 	if flagsSet["kube-api-burst"] {
 		kubeConfig.Burst = burst
+	} else {
+		kubeConfig.Burst = int(*cfg.ClientConnection.Burst)
 	}
 	// Metrics endpoint is enabled in 'config/default/kustomization.yaml'. The Metrics options configure the server.
 	// More info: