feat(grafana): allow user to install plugins

Author: wuvs

grafana/README.md

@@ -100,6 +100,8 @@
 | <a name="amqp_publisher_exchange"></a> [AMQP_PUBLISHER_EXCHANGE](#amqp_publisher_exchange) | no default | AMQP Publisher Exchange |
 | <a name="dashboard_json"></a> [DASHBOARD_JSON](#dashboard_json) | true | Poll a location for json files that contain dashboards |
 | <a name="dashboard_json_path"></a> [DASHBOARD_JSON_PATH](#dashboard_json_path) | /usr/share/grafana/dashboards | Location to scan for json dashboards |
+| <a name="plugins_path"></a> [PLUGINS_PATH](#plugins_path) | /var/lib/grafana/plugins | Path to where grafana can install plugins |
+| <a name="gf_install_plugins"></a> [GF_INSTALL_PLUGINS](#gf_install_plugins) | no default | Pass the plugins as a comma seperated list |
 
 ## Development
 The provided `Makefile` has various targets to help support building and publishing new images into a kubernetes cluster.

grafana/rootfs/usr/share/grafana/grafana.ini.tpl

@@ -17,6 +17,11 @@ data = {{ default "/var/lib/grafana" .DATA_PATH }}
 #
 logs = {{ default "/var/log" .LOG_PATH }}
 
+#
+# Directory where grafana will automatically scan and look for plugins
+#
+plugins = {{ default "/var/lib/grafana/plugins" .PLUGINS_PATH }}
+
 #################################### Server ####################################
 [server]
 # Protocol (http or https)

grafana/rootfs/usr/share/grafana/start-grafana

@@ -26,6 +26,21 @@ echo "###########################################"
 cat /usr/share/grafana/grafana.ini
 echo "###########################################"
 echo "###########################################"
+
+GF_PATHS_PLUGINS=${PLUGINS_PATH:-"/var/lib/grafana/plugins"}
+if [ ! -z "${GF_INSTALL_PLUGINS}" ]; then
+  echo "Installing Grafana plugins..."
+  OLDIFS=$IFS
+  IFS=','
+  for plugin in ${GF_INSTALL_PLUGINS}; do
+    echo "Installing ${plugin} ..."
+    grafana-cli  --pluginsDir "${GF_PATHS_PLUGINS}" plugins install ${plugin}
+    echo ""
+    echo "Done installing ${plugin}"
+  done
+  IFS=$OLDIFS
+fi
+
 set -m
 echo "Starting Grafana in the background"
 exec /usr/sbin/grafana-server -config /usr/share/grafana/grafana.ini -homepath /usr/share/grafana &