Add options to configure cache in nova
This patch adds new options:
* CACHE_BACKEND - with default "dogpile.cache.memcached"
* MEMCACHE_SERVERS - with default "localhost:1121"
to add possibility to configure various backends as cache in
Nova and Keystone.
It also adds options:
* KEYSTONE_ENABLE_CACHE - True by default
* NOVA_ENABLE_CACHE - True by default
To make possibility to enable and disable cache in those projects'
config files.
Default values configured there are the same as before were
hardcoded for Keystone config.
Nova has also enabled this cache by default.
Change-Id: I9082be077b59acd3a39910fa64e29147cb5c2dd7
Closes-Bug: #1836642
diff --git a/lib/nova b/lib/nova
index e3f8655..0a2becb 100644
--- a/lib/nova
+++ b/lib/nova
@@ -91,6 +91,7 @@
NOVA_SERVICE_LOCAL_HOST=${NOVA_SERVICE_LOCAL_HOST:-$SERVICE_LOCAL_HOST}
NOVA_SERVICE_LISTEN_ADDRESS=${NOVA_SERVICE_LISTEN_ADDRESS:-$(ipv6_unquote $SERVICE_LISTEN_ADDRESS)}
METADATA_SERVICE_PORT=${METADATA_SERVICE_PORT:-8775}
+NOVA_ENABLE_CACHE=${NOVA_ENABLE_CACHE:-True}
# Option to enable/disable config drive
# NOTE: Set ``FORCE_CONFIG_DRIVE="False"`` to turn OFF config drive
@@ -416,8 +417,8 @@
iniset $NOVA_CONF DEFAULT bindir "/usr/bin"
fi
- # only setup database connections if there are services that
- # require them running on the host. The ensures that n-cpu doesn't
+ # only setup database connections and cache backend if there are services
+ # that require them running on the host. The ensures that n-cpu doesn't
# leak a need to use the db in a multinode scenario.
if is_service_enabled n-api n-cond n-sched; then
# If we're in multi-tier cells mode, we want our control services pointing
@@ -434,6 +435,13 @@
iniset $NOVA_CONF database connection `database_connection_url $db`
iniset $NOVA_CONF api_database connection `database_connection_url nova_api`
+
+ # Cache related settings
+ # Those settings aren't really needed in n-cpu thus it is configured
+ # only on nodes which runs controller services
+ iniset $NOVA_CONF cache enabled $NOVA_ENABLE_CACHE
+ iniset $NOVA_CONF cache backend $CACHE_BACKEND
+ iniset $NOVA_CONF cache memcache_servers $MEMCACHE_SERVERS
fi
if is_service_enabled n-api; then