Add support for Grafana installation

Change-Id: Ia5819cd1baa63a4fd21432fc9cfd56c4739f9ffa

devstack/plugin.sh

@@ -130,6 +130,24 @@ function _gnocchi_install_influxdb {
     sudo /opt/influxdb/init.sh restart
 }
 
+function _gnocchi_install_grafana {
+    if is_ubuntu; then
+        local file=$(mktemp /tmp/grafanapkg-XXXXX)
+        wget -O "$file" "$GRAFANA_DEB_PKG"
+        sudo dpkg -i "$file"
+        rm $file
+    elif is_fedora; then
+        sudo yum install "$GRAFANA_RPM_PKG"
+    fi
+
+    git_clone ${GRAFANA_PLUGINS_REPO} ${GRAFANA_PLUGINS_DIR}
+    # Grafana-server does not handle symlink :(
+    sudo mkdir -p /usr/share/grafana/public/app/plugins/datasource/gnocchi
+    sudo mount -o bind ${GRAFANA_PLUGINS_DIR}/datasources/gnocchi /usr/share/grafana/public/app/plugins/datasource/gnocchi
+
+    sudo service grafana-server restart
+}
+
 # remove the influxdb database
 function _gnocchi_cleanup_influxdb {
     curl -G 'http://localhost:8086/query' --data-urlencode "q=DROP DATABASE $GNOCCHI_INFLUXDB_DBNAME"
@@ -232,10 +250,26 @@ function configure_gnocchi {
         exit 1
     fi
 
-    if ! is_service_enabled key; then
-        iniset $GNOCCHI_CONF api middlewares ""
+    if is_service_enabled key; then
+        if is_service_enabled gnocchi-grafana; then
+            iniset_multiline $GNOCCHI_CONF api middlewares oslo_middleware.cors.CORS keystonemiddleware.auth_token.AuthProtocol
+            for conf in $GNOCCHI_CONF $KEYSTONE_CONF; do
+                iniset $conf cors allowed_origin ${GRAFANA_URL}
+                iniset $conf cors allow_methods GET,POST,PUT,DELETE,OPTIONS,HEAD
+                iniset $conf cors allow_headers Content-Type,Cache-Control,Content-Language,Expires,Last-Modified,Pragma,X-Auth-Token,X-Subject-Token
+                iniset $conf cors expose_headers Content-Type,Cache-Control,Content-Language,Expires,Last-Modified,Pragma
+            done
+            iniset $KEYSTONE_PASTE_INI filter:cors paste.filter_factory oslo_middleware.cors:CORS.factory
+            iniset $KEYSTONE_PASTE_INI filter:cors oslo_config_project keystone
+            # This should be not required, see: https://bugs.launchpad.net/oslo.middleware/+bug/1491293
+            iniset $KEYSTONE_PASTE_INI filter:cors allowed_origin ${GRAFANA_URL}
+            local ks_pipeline=$(iniget $KEYSTONE_PASTE_INI pipeline:api_v3 pipeline)
+            iniset $KEYSTONE_PASTE_INI pipeline:api_v3 pipeline "cors $ks_pipeline"
+        else
+            iniset $GNOCCHI_CONF api middlewares keystonemiddleware.auth_token.AuthProtocol
+        fi
     else
-        inicomment $GNOCCHI_CONF api middlewares
+        iniset $GNOCCHI_CONF api middlewares ""
     fi
 
     # Configure the indexer database
@@ -303,6 +337,11 @@ function install_gnocchi {
         pip_install influxdb
     fi
 
+    if is_service_enabled gnocchi-grafana
+    then
+        _gnocchi_install_grafana
+    fi
+
     # NOTE(sileht): requirements are not merged with the global-requirement repo
     # setup_develop $GNOCCHI_DIR
     USE_CONSTRAINTS=False setup_package $GNOCCHI_DIR -e

devstack/settings

@@ -46,3 +46,10 @@ GNOCCHI_STORAGE_BACKEND=${GNOCCHI_STORAGE_BACKEND:-file}
 GNOCCHI_INFLUXDB_DBNAME=${GNOCCHI_INFLUXDB_DBNAME:-gnocchidevstack}
 GNOCCHI_INFLUXDB_RPM_PKG=${GNOCCHI_INFLUXDB_RPM_PKG:-https://s3.amazonaws.com/influxdb/influxdb-0.9.3-1.x86_64.rpm}
 GNOCCHI_INFLUXDB_DEB_PKG=${GNOCCHI_INFLUXDB_DEB_PKG:-https://s3.amazonaws.com/influxdb/influxdb_0.9.3_amd64.deb}
+
+# Grafana settings
+GRAFANA_RPM_PKG=${GRAFANA_RPM_PKG:-https://grafanarel.s3.amazonaws.com/builds/grafana-2.1.3-1.x86_64.rpm}
+GRAFANA_DEB_PKG=${GRAFANA_DEB_PKG:-https://grafanarel.s3.amazonaws.com/builds/grafana_2.1.3_amd64.deb}
+GRAFANA_PLUGINS_DIR=${GRAFANA_PLUGINS_DIR:-$DEST/grafana-plugins}
+GRAFANA_PLUGINS_REPO=${GRAFANA_PLUGINS_REPO:-http://github.com/grafana/grafana-plugins.git}
+GRAFANA_URL=${GRAFANA_URL:-http://$HOST_IP:3000}

doc/source/devstack.rst

@@ -9,6 +9,9 @@ To enable Gnocchi in devstack, add the following to local.conf:
     enable_plugin gnocchi https://github.com/openstack/gnocchi master
     enable_service gnocchi-api,gnocchi-metricd
 
+To enable Grafana support in devstack, you can also enable `gnocchi-grafana`::
+
+    enable_service gnocchi-grafana
 
 Then, you can start devstack: