Merge pull request #786 from charleszheng44/manager-version

[VC] add version option for vc-manager

incubator/virtualcluster/cmd/manager/main.go

@@ -32,6 +32,8 @@ import (
 
 	logrutil "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/controller/util/logr"
 	vcmanager "sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/controller/vcmanager"
+	"sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/version"
+	"sigs.k8s.io/multi-tenancy/incubator/virtualcluster/pkg/version/verflag"
 )
 
 func main() {
@@ -42,15 +44,24 @@ func main() {
 		leaderElection          bool
 		leaderElectionCmName    string
 		maxConcurrentReconciles int
+		versionOpt              bool
 	)
 	flag.StringVar(&metricsAddr, "metrics-addr", ":0", "The address the metric endpoint binds to.")
 	flag.StringVar(&masterProvisioner, "master-prov", "native", "The underlying platform that will provision master for virtualcluster.")
 	flag.BoolVar(&leaderElection, "leader-election", true, "If enable leaderelection for vc-manager")
 	flag.StringVar(&leaderElectionCmName, "le-cm-name", "vc-manager-leaderelection-lock", "The name of the configmap that will be used as the resourcelook for leaderelection")
 	flag.IntVar(&maxConcurrentReconciles, "num-reconciles", 10, "The max number reconcilers of virtualcluster controller")
 	flag.StringVar(&logFile, "log-file", "", "The path of the logfile, if not set, only log to the stderr")
+	flag.BoolVar(&versionOpt, "version", false, "Print the version information")
 
 	flag.Parse()
+
+	// print version information
+	if versionOpt {
+		fmt.Printf("VirtualCluster %s\n", verflag.GetVersion(version.Get()))
+		os.Exit(0)
+	}
+
 	loggr, err := logrutil.NewLoggerToFile(logFile)
 	if err != nil {
 		panic(fmt.Sprintf("fail to initialize logr: %s", err))