Add storage configuration option to devstack plugin

This adds the CLOUDKITTY_STORAGE_BACKEND option to CloudKitty's devstack
plugin, allowing users to choose the storage backend they want to use.

Change-Id: I442131cfbbb6f6229a5e8e2a9efe4a4b33338ac9

devstack/README.rst

@@ -38,3 +38,8 @@ Configure DevStack to run CloudKitty
 Run devstack as usual::
 
     $ ./stack.sh
+
+See the documentation_ if you want more details about how to configure the
+devstack plugin.
+
+.. _documentation: https://docs.openstack.org/cloudkitty/latest/devstack.html

devstack/plugin.sh

@@ -173,6 +173,12 @@ function configure_cloudkitty {
     iniset $CLOUDKITTY_CONF output basepath $CLOUDKITTY_OUTPUT_BASEPATH
     iniset $CLOUDKITTY_CONF output pipeline $CLOUDKITTY_OUTPUT_PIPELINE
 
+    # storage
+    iniset $CLOUDKITTY_CONF storage backend $CLOUDKITTY_STORAGE_BACKEND
+    if [ "$CLOUDKITTY_STORAGE_BACKEND" != "sqlalchemy" ]; then
+        iniset $CLOUDKITTY_CONF storage_${CLOUDKITTY_STORAGE_BACKEND} auth_section authinfos
+    fi
+
     # database
     local dburl=`database_connection_url cloudkitty`
     iniset $CLOUDKITTY_CONF database connection $dburl
@@ -185,6 +191,13 @@ function configure_cloudkitty {
     fi
 }
 
+function wait_for_gnocchi() {
+    local gnocchi_url=$(openstack --os-cloud devstack-admin endpoint list --service metric --interface public -c URL -f value)
+    if ! wait_for_service $SERVICE_TIMEOUT $gnocchi_url; then
+       die $LINENO "Waited for gnocchi too long."
+    fi
+}
+
 # create_cloudkitty_cache_dir() - Part of the init_cloudkitty() process
 function create_cloudkitty_cache_dir {
     # Create cache dir
@@ -226,6 +239,9 @@ function init_cloudkitty {
     $CLOUDKITTY_BIN_DIR/cloudkitty-dbsync upgrade
 
     # Init the storage backend
+    if [ $CLOUDKITTY_STORAGE_BACKEND == 'hybrid' ]; then
+        wait_for_gnocchi
+    fi
     $CLOUDKITTY_BIN_DIR/cloudkitty-storage-init
 
     create_cloudkitty_cache_dir

devstack/settings

@@ -45,6 +45,9 @@ CLOUDKITTY_COLLECTOR=${CLOUDKITTY_COLLECTOR:-gnocchi}
 CLOUDKITTY_SERVICES=${CLOUDKITTY_SERVICES:-compute}
 CLOUDKITTY_METRICS_CONF=metrics.yml
 
+# Set CloudKitty storage info
+CLOUDKITTY_STORAGE_BACKEND=${CLOUDKITTY_STORAGE_BACKEND:-"sqlalchemy"}
+
 # Set CloudKitty output info
 CLOUDKITTY_OUTPUT_BACKEND=${CLOUDKITTY_OUTPUT_BACKEND:-"cloudkitty.backend.file.FileBackend"}
 CLOUDKITTY_OUTPUT_BASEPATH=${CLOUDKITTY_OUTPUT_BASEPATH:-$CLOUDKITTY_REPORTS_DIR}