[Linux-cluster] Multiple "rgmanager" instances after re-booting from a kernel panic.

[emmanuel segura]

no cluster config, no logs :(


2014-01-28 Demetres Pantermalis <dpant at intracom-telecom.com>

> Hello.
>
> We have a strange situation with rgmanager on a two node
> (active/passive) cluster, on physical servers.
> Nodes are N1 and N2.
> Out investigation is to simulate how the cluster will react after a
> kernel panic of the active node.
> Kernel panic is "simulated" with echo b > /proc/sysrq-trigger
> Fence agent used: fence_scsi
> Common storage is: EMC (with powerPath installed on both nodes)
>
> The scenarios are:
> S1. Active node is N1 passive mode is N2
> After kernel panic of N1, the N2 resumes the services previously run on
> N1 (Expected behavior).
> N1 re-boots and after a while re-joins the cluster. (Expected behavior)
>
> S2. Now, active node is N2.
> We perform a kernel panic on N2. N1 resumes (correctly) the services
> previously run on N2.
> After the reboot of N2, cman starts OK (with all other processes), as
> well as clvmd.
> But the rgmanager process seems to hang and in 'ps' it appears three
> times (the normal is two).
> The logs from N2 show:
> rgmanager[4985]: I am node #2
> rgmanager[4985]: Resource Group Manager Starting
> rgmanager[4985]: Loading Service Data
>
> ps -ef | grep rgmanager
> root      4983     1  0 15:19 ?        00:00:00 rgmanager
> root      4985  4983  0 15:19 ?        00:00:00 rgmanager
> root      5118  4985  0 15:19 ?        00:00:00 rgmanager
>
> Versions:
> rgmanager-3.0.12.1-19.el6.x86_64
> cman-3.0.12.1-59.el6.x86_64
> corosync-1.4.1-17.el6.x86_64
> fence-agents-3.1.5-35.el6.x86_64
> clusterlib-3.0.12.1-59.el6.x86_64
> lvm2-cluster-2.02.87-6.el6.x86_64
>
>
> Any help appreciated.
> Demetres.
>
>
>
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>



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