fix long startup issue

initAzureApiVersions can take too ong if there are many subscriptions

Signed-off-by: Markus Blaschke <mblaschke82@gmail.com>

Author: mblaschke

janitor/janitor.go

@@ -79,7 +79,7 @@ func (j *Janitor) Init() {
 	j.Azure.SubscriptionsIterator = armclient.NewSubscriptionIterator(j.Azure.Client, j.Conf.Azure.Subscription...)
 
 	j.initPrometheus()
-	j.initAuzreApiVersions()
+	j.initAzureApiVersions()
 }
 
 func (j *Janitor) Run() {
@@ -151,14 +151,16 @@ func (j *Janitor) Run() {
 	}()
 }
 
-func (j *Janitor) initAuzreApiVersions() {
+func (j *Janitor) initAzureApiVersions() {
 	ctx := context.Background()
 
 	j.apiVersionMap = map[string]map[string]string{}
 
 	err := j.Azure.SubscriptionsIterator.ForEach(j.Logger, func(subscription *armsubscriptions.Subscription, logger *zap.SugaredLogger) {
 		subscriptionId := to.String(subscription.SubscriptionID)
 
+		j.Logger.With(zap.String("subscriptionID", subscriptionId)).Infof(`fetch Azure available api-versions`)
+
 		// fetch location translation map
 		subscriptionClient, err := armsubscriptions.NewClient(j.Azure.Client.GetCred(), j.Azure.Client.NewArmClientOptions())
 		if err != nil {

main.go

@@ -46,17 +46,19 @@ func main() {
 	initAzureConnection()
 
 	logger.Infof("init Janitor")
-	j := janitor.Janitor{
-		Conf:      Opts,
-		UserAgent: UserAgent + gitTag,
-		Logger:    logger,
-		Azure: janitor.JanitorAzureConfig{
-			Client:       AzureClient,
-			Subscription: Opts.Azure.Subscription,
-		},
-	}
-	j.Init()
-	j.Run()
+	go func() {
+		j := janitor.Janitor{
+			Conf:      Opts,
+			UserAgent: UserAgent + gitTag,
+			Logger:    logger,
+			Azure: janitor.JanitorAzureConfig{
+				Client:       AzureClient,
+				Subscription: Opts.Azure.Subscription,
+			},
+		}
+		j.Init()
+		j.Run()
+	}()
 
 	logger.Infof("starting http server on %s", Opts.Server.Bind)
 	startHttpServer()