[ClusterLabs] ip clustering strange behaviour

[Klaus Wenninger]

On 08/29/2016 05:18 PM, Gabriele Bulfon wrote:
> Hi,
>
> now that I have IPaddr work, I have a strange behaviour on my test
> setup of 2 nodes, here is my configuration:
>
> ===STONITH/FENCING===
>
> primitive xstorage1-stonith stonith:external/ssh-sonicle op monitor
> interval="25" timeout="25" start-delay="25" params hostlist="xstorage1"
>
> primitive xstorage2-stonith stonith:external/ssh-sonicle op monitor
> interval="25" timeout="25" start-delay="25" params hostlist="xstorage2"
>
> location xstorage1-stonith-pref xstorage1-stonith -inf: xstorage1
> location xstorage2-stonith-pref xstorage2-stonith -inf: xstorage2
>
> property stonith-action=poweroff
>
>
>
> ===IP RESOURCES===
>
>
> primitive xstorage1_wan1_IP ocf:heartbeat:IPaddr params ip="1.2.3.4"
> cidr_netmask="255.255.255.0" nic="e1000g1"
> primitive xstorage2_wan2_IP ocf:heartbeat:IPaddr params ip="1.2.3.5"
> cidr_netmask="255.255.255.0" nic="e1000g1"
>
> location xstorage1_wan1_IP_pref xstorage1_wan1_IP 100: xstorage1
> location xstorage2_wan2_IP_pref xstorage2_wan2_IP 100: xstorage2
>
> ===================
>
> So I plumbed e1000g1 with unconfigured IP on both machines and started
> corosync/pacemaker, and after some time I got all nodes online and
> started, with IP configured as virtual interfaces (e1000g1:1 and
> e1000g1:2) one in host1 and one in host2.
>
> Then I halted host2, and I expected to have host1 started with both
> IPs configured on host1.
> Instead, I got host1 started with the IP stopped and removed (only
> e1000g1 unconfigured), host2 stopped saying IP started (!?).
> Not exactly what I expected...
> What's wrong?

How did you stop host2? Graceful shutdown of pacemaker? If not ...
Anyway ssh-fencing is just working if the machine is still running ...
So it will stay unclean and thus pacemaker is thinking that
the IP might still be running on it. So this is actually the expected
behavior.
You might add a watchdog via sbd if you don't have other fencing
hardware at hand ...
>
> Here is the crm status after I stopped host 2:
>
> 2 nodes and 4 resources configured
>
> Node xstorage2: UNCLEAN (offline)
> Online: [ xstorage1 ]
>
> Full list of resources:
>
> xstorage1-stonith (stonith:external/ssh-sonicle): Started xstorage2
> (UNCLEAN)
> xstorage2-stonith (stonith:external/ssh-sonicle): Stopped
> xstorage1_wan1_IP (ocf::heartbeat:IPaddr): Stopped
> xstorage2_wan2_IP (ocf::heartbeat:IPaddr): Started xstorage2 (UNCLEAN)
>
>
> Gabriele
>
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