Memcached is configured by default for the eucaconsole service on a single host.
On multiple hosts (in a scaling group), it is required to run a central memcached, as outlined in the
This procedure assumes that the Eucalyptus Management Console package is installed.
For instructions on installing the packages, see Install the Eucalyptus Management Console
Note: If there is just
one Console server, the automatically configured memcached service is sufficient for
use by the console.
Turn off the default memcached on all the consoles by editing /etc/init.d/eucaconsole
and set MEMCACHED_FLAGS="NO". This would normally be handled by your cloud-init or cfn-init
script from your launch configuration.
Set up a central memcache to ensure your memcached instance is available and
durable, we recommend running it within a scaling group of 1 and behind an ELB.
The ELB requires a listener for port 11211 and its DNS address would be used in
the cache.memory.url in the next step.
Configure the console.ini file to talk to the central memcached. This
is typically defined in an init script, such as the cloud.init, shell
script or cfn.init file. For example, the memcached socket in the cache memory
URL should point to the port that memcached uses (11211) to listen:
cache.memory.url = /var/run/eucaconsole/memcached.sock
cache.memory.url = [memcachedhost]:11211
cache.memory.url = 10.0.0.20:11211