Hi,
ceilometer-agent-central element was added recently into overcloud
image. To be able scale out overcloud control nodes, we need HA for this
central agent. Currently central agent can not scale out (until [1] is
done). For now, the simplest way is add the central agent to Pacemaker,
which is quite simple.
The issue is that distributions supported in TripleO provide different
tools for managing Pacemaker. Ubuntu/Debian provides crmsh, Fedora/RHEL
provides pcs, OpenSuse provides both. I didn't find packages for all our
distros for any of the tools. Also if there is a third-party repo
providing packages for various distros, adding dependency on an
untrusted third-party repo might be a problem for some users.
Although it's a little bit annoying, I think we will end up with
managing commands for both config tools, a resource creation sample:
if $USE_PCS;then
crm configure primitive ClusterIP ocf:heartbeat:IPaddr2 params
ip=192.168.122.120 cidr_netmask=32 op monitor interval=30s
else
pcs resource create ClusterIP IPaddr2 ip=192.168.0.120 cidr_netmask=32
fi
There are not many places where pacemaker configuration would be
required, so I think this is acceptable. Any other opinions?
Jan
[1]
https://blueprints.launchpad.net/ceilometer/+spec/central-agent-improvement
_______________________________________________
OpenStack-dev mailing list
[email protected]
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
