Wikimedia Labs/Stability improvement project

Monitoring

 * Add nagios monitoring for glusterfs
 * Add check for brick health via gluster volume status
 * Add disk space check
 * Improve LDAP nagios monitoring
 * Add a check for searching specific entries
 * Improve pdns nagios monitoring
 * Add a check for searching specific entries
 * Add nagios monitoring for all OpenStack services
 * Add ganglia metrics for OpenStack services
 * Add ganglia metrics for KVM

LDAP

 * Bug 44722: Make two LDAP servers per datacenter
 * Bug 44720: Only list LDAP servers located in the same datacenter in the nslcd configuration

OpenStack

 * Bug 46817 Upgrade to Folsom
 * Bugs 46818, 46824, 46825: Switch DNS middleware to Moniker
 * Bugs 46819, 46821 (upstream): Add network node per-compute node

Gluster

 * Delete all unused volumes
 * Bugs 46823: Replace glusterfs