api,cluster,sidecar: fix the bug for infinite loop #201,#219

Author: acekingke

api/v1alpha1/backup_types.go

@@ -31,7 +31,7 @@ type BackupSpec struct {
 
 	// To specify the image that will be used for sidecar container.
 	// +optional
-	// +kubebuilder:default:="radondb/mysql-sidecar:0.1.88"
+	// +kubebuilder:default:="radondb/mysql-sidecar:latest"
 	Image string `json:"image"`
 
 	// HostName represents the host for which to take backup

cluster/syncer/statefulset.go

@@ -510,6 +510,13 @@ func (s *StatefulSetSyncer) applyNWait(ctx context.Context, pod *corev1.Pod) err
 			return true, nil
 		}
 
+		// fix issue#219. When 2->5 rolling update, Because of PDB, minAvaliable 50%, if Spec Replicas is 5, sfs Spec first be set to 3, then to be set 5
+		// pod healthy is yes,but controller-revision-hash will never correct, it must return,otherwise wait for 2 hours.
+		// https://kubernetes.io/zh/docs/tasks/run-application/configure-pdb/
+		if pod.ObjectMeta.Labels["healthy"] == "yes" &&
+			pod.ObjectMeta.Labels["controller-revision-hash"] != s.sfs.Status.UpdateRevision {
+			return false, fmt.Errorf("pod %s is ready, wait next schedule", pod.Name)
+		}
 		return false, nil
 	})
 }

sidecar/config.go

@@ -459,15 +459,15 @@ done
 i=0
 while [ $i -lt %d ]; do
 	if [ $i -ne %d ]; then
-		while true; do
+		for k in $(seq 12); do
 			res=$(curl -i -X POST -d '{"address": "%s-'$i'.%s.%s:%d"}' -u root:%s http://%s:%d/v1/cluster/add)
 			code=$(echo $res|grep "HTTP"|awk '{print $2}')
 			if [ "$code" -eq "200" ]; then
 				break
 			fi
 		done
 
-		while true; do
+		for k in $(seq 12); do
 			res=$(curl -i -X POST -d '{"address": "%s:%d"}' -u root:%s http://%s-$i.%s.%s:%d/v1/cluster/add)
 			code=$(echo $res|grep "HTTP"|awk '{print $2}')
 			if [ "$code" -eq "200" ]; then