prevent blocking wait in cert reloading

Author: deads2k

staging/src/k8s.io/apiserver/pkg/server/dynamiccertificates/configmap_cafile_content.go

@@ -217,7 +217,7 @@ func (c *ConfigMapCAController) Run(workers int, stopCh <-chan struct{}) {
 	go wait.Until(c.runWorker, time.Second, stopCh)
 
 	// start timer that rechecks every minute, just in case.  this also serves to prime the controller quickly.
-	_ = wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
+	go wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
 		c.queue.Add(workItemKey)
 		return false, nil
 	}, stopCh)

staging/src/k8s.io/apiserver/pkg/server/dynamiccertificates/dynamic_cafile_content.go

@@ -170,7 +170,7 @@ func (c *DynamicFileCAContent) Run(workers int, stopCh <-chan struct{}) {
 	go wait.Until(c.runWorker, time.Second, stopCh)
 
 	// start timer that rechecks every minute, just in case.  this also serves to prime the controller quickly.
-	_ = wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
+	go wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
 		c.queue.Add(workItemKey)
 		return false, nil
 	}, stopCh)

staging/src/k8s.io/apiserver/pkg/server/dynamiccertificates/dynamic_serving_content.go

@@ -133,7 +133,7 @@ func (c *DynamicFileServingContent) Run(workers int, stopCh <-chan struct{}) {
 	go wait.Until(c.runWorker, time.Second, stopCh)
 
 	// start timer that rechecks every minute, just in case.  this also serves to prime the controller quickly.
-	_ = wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
+	go wait.PollImmediateUntil(FileRefreshDuration, func() (bool, error) {
 		c.queue.Add(workItemKey)
 		return false, nil
 	}, stopCh)