Update db backup/restore retry for sending to remote

There is an additional error status 'Service Unavailable' which can
indicate the service is temporary unavailable. Adding that error
status to the retry list in case the issue is resolved during the
backup timeframe.

Change-Id: I9e2fc1a9b33dea3858de06b10d512da98a635015

helm-toolkit/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Helm-Toolkit
 name: helm-toolkit
-version: 0.2.16
+version: 0.2.17
 home: https://docs.openstack.org/openstack-helm
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/OpenStack-Helm/OpenStack_Project_OpenStackHelm_vertical.png
 sources:

helm-toolkit/templates/scripts/db-backup-restore/_backup_main.sh.tpl

@@ -165,7 +165,7 @@ send_to_remote_server() {
       log ERROR "${DB_NAME}_backup" "Access denied by keystone: ${RESULT}"
       return 1
     else
-      echo $RESULT | grep -E "ConnectionError|Failed to discover available identity versions"
+      echo $RESULT | grep -E "ConnectionError|Failed to discover available identity versions|Service Unavailable"
       if [[ $? -eq 0 ]]; then
         log ERROR "${DB_NAME}_backup" "Could not reach the RGW: ${RESULT}"
         # In this case, keystone or the site/node may be temporarily down.

releasenotes/notes/helm-toolkit.yaml

@@ -23,4 +23,5 @@ helm-toolkit:
   - 0.2.14 Remove TLS_OPTION argument from s3 bucket creation job
   - 0.2.15 Adding TLS rabbitmq logic
   - 0.2.16 Add manual mode to the created backup file name
+  - 0.2.17 Update db backup/restore retry for sending to remote
 ...