DVR+HA routers are officially supported, so this patch can be reverted.
This reverts commit ce39dbac56.
This patch adds an example increased value for NovaReservedHostMemory
and some documentation around tuning this value when DVR is enabled.
This patch sets NeutronL3HA to false when the DVR environment is
included on deployment. L3 HA isn't supported with DVR routers and is
disabled by defaults in our templates but upgrading users might have it
enabled in their existing overclouds. Including the setting here with
an appropriate comment gives us some sort of mechanism to convey to the
upgrading user what they need to do. This will have no effect on users
not using L3 HA or deploying new overclouds.
This patch adds support for conditionally enabling DVR by deploying the
L3 and metadata agents on the compute node and setting the proper
configuration values throughout.
Implements: blueprint neutron-dvr-support