[Pacemaker] Ordering clones and primitives
Lars Kellogg-Stedman
lars at oddbit.com
Sat Oct 30 17:55:33 UTC 2010
I have a two node cluster that hosts two virtual ips on the same network:
primitive proxy_0_ip ocf:heartbeat:IPaddr \
params ip="10.10.10.20" cidr_netmask="255.255.255.0" nic="eth3"
primitive proxy_1_ip ocf:heartbeat:IPaddr \
params ip="10.10.10.30" cidr_netmask="255.255.255.0" nic="eth3"
After the ip address comes up, the system must establish a network
route and a default route. I'm having trouble defining the
relationships between these services. I started with this:
primitive public_net_route ocf:heartbeat:Route \
params destination="10.10.10.0/24"
device="eth3" table="1"
primitive public_def_route ocf:heartbeat:Route \
params destination="default" gateway="10.10.10.1"
device="eth3" table="1"
clone clone_public_def_route public_def_route
clone clone_public_net_route public_net_route
But having got this before, I don't understand how to estbalish the
necessary ordering between the routes and the ip address resources.
The clones can't come up on a host until one of the ip addresses are
available on the host. In other words, the cloned resources cannot be
active on a host unless an ip address resource is also active on that
host.
I tried this:
order ip_0_before_routes inf: proxy_0_ip clone_public_net_route
order ip_1_before_routes inf: proxy_1_ip clone_public_net_route
order net_route_before_def_route \
inf: clone_public_net_route clone_public_def_route
...but the clone services in this case don't start unless both ips are
started. Shutting down either ip takes down *all* of the clone
resources on both nodes.
Is it possible to do what I want? This seems like exactly the same
relationship that would exist betwee, say, a cloned Apache instance
and a set of ip address resources, but I can't find a good example.
Thanks!
More information about the Pacemaker
mailing list