[Pacemaker] Strange behavior when starting up Corosync in a single node setup

[Andrew Beekhof]

On Fri, Sep 10, 2010 at 1:15 PM, Stephan-Frank Henry
<Frank.Henry at gmx.net> wrote:
> Hello again,
>
> new week new problem. :D
>
> Setup:
> Single node setup (default via my installer)
> /etc/hosts
> 127.0.0.1       localhost
> 172.16.0.1      cmsserver001
>
> the installer basically already takes care of setting everything up for a single node by using both above as nodes in the drbd.conf. This has been proven to work in other setups, though we are having problems with exactly these settings.
>
> When corosync starts up, it throws these errors a few times:
>
> Sep 10 09:50:04 cmsserver001 crmd: [4990]: info: crm_timer_popped: Election Trigger (I_DC_TIMEOUT) just popped!
> Sep 10 09:50:04 cmsserver001 crmd: [4990]: WARN: do_log: FSA: Input I_DC_TIMEOUT from crm_timer_popped() received in state S_PENDING
> Sep 10 09:50:04 cmsserver001 crmd: [4990]: info: do_state_transition: State transition S_PENDING -> S_ELECTION [ input=I_DC_TIMEOUT cause=C_TIMER_POPPED origin=crm_timer_popped ]
>
> I have checked all the usual suspects (hosts, interfaces, ifconfig, et al) and found nothing that could indicate a problem.
>
> A quick google indicated that it could be a firewall issue. Though we are using a firewall (firehol), it is by default set to pass-through all traffic.
>
> Though what we can see are a lot of ntp messages:
> Sep 10 09:49:57 cmsserver001 named[3360]: network unreachable resolving '2.debian.pool.ntp.org/A/IN': 2001:dc3::35#53
>
> Could this be the issue?
>
> Funny thing is, as soon as we set up the node with an 'real' ip in the network, it works fine.
>
> Does anyone have any ideas?

Looks like corosync can't talk to itself - ie. it never sees the
multicast messages it sends out.
This would result in the pacemaker errors you're seeing.

Almost always this is a firewall issue :-)
Perhaps try disabling it completely?


>
> thanks
>
> Frank
> --
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