[Linux-cluster] Cman (and corosync) starting before network interface is ready

[Andrew Beekhof]

On 17 Sep 2014, at 7:20 am, Vallevand, Mark K <Mark.Vallevand at UNISYS.com> wrote:

> It looks like there is some odd delay in getting a network interface up and ready.  So, when cman starts corosync, it can’t get to the cluster.  So, for a time, the node is a member of a cluster-of-one.  The cluster-of-one begins starting resources.

1. enable two-node mode in cluster.conf (man page should indicate where/how) then disable no-quorum-policy=ignore
2. configure fencing
3. find a newer version of pacemaker, we're up to .12 now

>  A few seconds later, when the interface finally is up and ready, it takes about 30 more seconds for the cluster-of-one to finally rejoin the larger cluster.  The doubly-started resources are sorted out and all ends up OK.
>  
> Now, this is not a good thing to have these particular resources running twice.  I’d really like the clustering software to behave better.  But, I’m not sure what ‘behave better’ would be.
>  
> Is it possible to introduce a delay into cman or corosync startup?  Is that even wise?
> Is there a parameter to get the clustering software to poll more often when it can’t rejoin the cluster?
>  
> Any suggestions would be welcome.
>  
> Running Ubuntu 12.04 LTS.  Pacemaker 1.1.6.  Cman 3.1.7.  Corosync 1.4.2.
>  
> Regards. 
> Mark K Vallevand
> "If there are no dogs in Heaven, then when I die I want to go where they went."
> -Will Rogers
> 
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