Fix trove-imager-loader.service not started

This service will pull database images after the system started.

Change-Id: I510adc33116760ec5af54a9158b76c9a628ef981

integration/scripts/files/elements/guest-agent/install.d/guest-agent-source-install/50-trove-image-loader

@@ -9,10 +9,18 @@ backup_image=$(crudini --get /etc/trove/conf.d/trove-guestagent.conf "$datastore
 echo "datastore_image=$datastore_image"
 echo "backup_image=$backup_image"
 
-if [ -n "$datastore_image" ]; then
-  docker pull "${datastore_image}:${datastore_version}"
+if docker image inspect "${datastore_image}:${datastore_version}" >/dev/null 2>&1; then
+  echo "Image already exists, skip loading."
+else
+  if [ -n "$datastore_image" ]; then
+    docker pull "${datastore_image}:${datastore_version}"
+  fi
 fi
 
-if [ -n "$backup_image" ]; then
-  docker pull "${backup_image}:${datastore_version}"
+if docker image inspect "${backup_image}:${datastore_version}" >/dev/null 2>&1; then
+    echo "Image already exists, skip loading."
+else
+  if [ -n "$backup_image" ]; then
+    docker pull "${backup_image}:${datastore_version}"
+  fi
 fi

integration/scripts/files/elements/guest-agent/install.d/guest-agent-source-install/trove-image-loader.service

@@ -8,3 +8,6 @@ Type=oneshot
 User=root
 Group=root
 ExecStart=/usr/local/sbin/trove-image-loader
+
+[Install]
+WantedBy=multi-user.target

integration/scripts/files/elements/guest-agent/post-install.d/31-enable-guest-agent-systemd

@@ -7,7 +7,7 @@ set -eu
 set -o pipefail
 
 if [ "$DIB_INIT_SYSTEM" == "systemd" ]; then
-    systemctl enable $(svc-map guest-agent docker-hostnic.socket)
+    systemctl enable $(svc-map guest-agent docker-hostnic.socket trove-image-loader)
 fi
 
 if [[ ${SYNC_LOG_TO_CONTROLLER} == "True" ]]; then