devstack: allow to configure not backend

Mehdi Abaakouk · Mehdi Abaakouk (sileht) · commit 995f93df360f · 2016-11-04T14:09:18.000Z
This change allows to configure ceilometer with no backend. For example
if we want to use only panko.

This also change the default backend to this one since mysql is not
recommanded.

Change-Id: Ie85d7fa5476fc68a0a867072517191ae6ed7aad7
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
@@ -34,7 +34,7 @@
 # of Ceilometer (see within for additional settings):
 #
 #   CEILOMETER_PIPELINE_INTERVAL:  Seconds between pipeline processing runs. Default 600.
-#   CEILOMETER_BACKEND:            Database backend (e.g. 'mysql', 'mongodb', 'es')
+#   CEILOMETER_BACKEND:            Database backend (e.g. 'mysql', 'mongodb', 'es', 'gnocchi', 'none')
 #   CEILOMETER_COORDINATION_URL:   URL for group membership service provided by tooz.
 #   CEILOMETER_EVENT_ALARM:        Set to True to enable publisher for event alarming
 
@@ -237,7 +237,13 @@ function _ceilometer_configure_cache_backend {
 
 # Set configuration for storage backend.
 function _ceilometer_configure_storage_backend {
-    if [ "$CEILOMETER_BACKEND" = 'mysql' ] || [ "$CEILOMETER_BACKEND" = 'postgresql' ] ; then
+    if [ "$CEILOMETER_BACKEND" = 'none' ] ; then
+        inidelete $CEILOMETER_CONF DEFAULT meter_dispatchers
+        inidelete $CEILOMETER_CONF DEFAULT event_dispatchers
+        if ! is_service_enabled panko-api; then
+            echo_summary "All Ceilometer backends seems disabled, set \$CEILOMETER_BACKEND to select one."
+        fi
+    elif [ "$CEILOMETER_BACKEND" = 'mysql' ] || [ "$CEILOMETER_BACKEND" = 'postgresql' ] ; then
         iniset $CEILOMETER_CONF DEFAULT meter_dispatchers database
         iniset $CEILOMETER_CONF database event_connection $(database_connection_url ceilometer)
         iniset $CEILOMETER_CONF database metering_connection $(database_connection_url ceilometer)
diff --git a/devstack/settings b/devstack/settings
@@ -15,8 +15,8 @@ CEILOMETER_CONF=$CEILOMETER_CONF_DIR/ceilometer.conf
 CEILOMETER_AUTH_CACHE_DIR=${CEILOMETER_AUTH_CACHE_DIR:-/var/cache/ceilometer}
 CEILOMETER_WSGI_DIR=${CEILOMETER_WSGI_DIR:-/var/www/ceilometer}
 
-# Set up database backend
-CEILOMETER_BACKEND=${CEILOMETER_BACKEND:-mysql}
+# Set up no backend
+CEILOMETER_BACKEND=${CEILOMETER_BACKEND:-none}
 
 # Gnocchi default archive_policy for Ceilometer
 GNOCCHI_ARCHIVE_POLICY=${GNOCCHI_ARCHIVE_POLICY:-low}
