I'm testing my cluster configuration by rebooting nodes to see what happens. I
can't explain what I see in some cases.
The setup: I have a cloned resource with its own agent and an IP address
resource that is collocated with the cloned resource. The IP address doesn't
need to run on all of the nodes running an instance of the cloned resource. It
just needs to be on one of the nodes. It's not cloned or meant to be
load-balanced.
I do something like this:
crm -F configure <<EOF
primitive IP ocf:heartbeat:IPaddr2 \
params ip=10.1.1.1 nic=eth0
cidr_netmask=24 \
op monitor interval=30s
timeout=20s \
op start timeout=30s \
op stop timeout=30s
primitive P ocf:heartbeat:my_agent \
op monitor interval=30s
timeout=10s \
op start timeout=30s \
op stop timeout=30s
clone P_clone P \
meta clone-max=2 notify="true"
clone-node-max=1
colocation P_withIP INFINITY: IP P_clone
order P_AfterIP INFINITY: IP P_clone
commit
exit
EOF
This works great. In my 2 node system, node1 has IP and P:0 on it, node2 has
P:1 on it, and node3 has nothing on it.
Reboot node2. I see P:1 start on node3. Good.
Reboot node3. I see P:1 start on node2. Good.
Reboot node1. I see P:0 and IP start on node3. Good. And I see P:1 restart
on node2.
What's up with that?
Have I done my collocation incorrectly? If I reboot the node that has the IP
resource on it, all instances of P_clone move or restart.
Any ideas are very welcome.
Regards.
Mark K Vallevand [email protected]<mailto:[email protected]>
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