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ISCSI fail over VM hangs

 

 

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joseph-andre at rdmo

Jul 25, 2013, 1:52 AM

Post #1 of 2 (62 views)
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ISCSI fail over VM hangs

Hi,

We are currently running a two node cluster on pacemaker + drbd in
orfer to offer a HA ISCSI target.

We cam accros some trouble when migrating the ISCSI target from one to
the other. The write in the VM stops and after 120 seconds we just get
lots IO errors.

I went on the XCP to look for information an iscsi session. It was
still active and looged in. I supposed we have problem with the ISCSI
layer wether on the initiator/target side (need tweak for taking into
account fail over) or it is a completer différent problem such as
network issues.

I like to know how to troubleshoot the problem in order to identify
the right cause.





thanks in advance for your help,



Joseph

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lambert.olivier at gmail

Jul 27, 2013, 8:17 AM

Post #2 of 2 (53 views)
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Re: ISCSI fail over VM hangs [In reply to]

Hi Joseph ;)

If you stop a VM, let's say on "host1", is it working when you boot it
on "host2"? The question behind is to find when this problem occurs
(only during live migration?)

On Thu, Jul 25, 2013 at 10:52 AM, Joseph-Andre Guaragna
<joseph-andre [at] rdmo> wrote:
> Hi,
>
> We are currently running a two node cluster on pacemaker + drbd in
> orfer to offer a HA ISCSI target.
>
> We cam accros some trouble when migrating the ISCSI target from one to
> the other. The write in the VM stops and after 120 seconds we just get
> lots IO errors.
>
> I went on the XCP to look for information an iscsi session. It was
> still active and looged in. I supposed we have problem with the ISCSI
> layer wether on the initiator/target side (need tweak for taking into
> account fail over) or it is a completer différent problem such as
> network issues.
>
> I like to know how to troubleshoot the problem in order to identify
> the right cause.
>
>
>
>
>
> thanks in advance for your help,
>
>
>
> Joseph
>
> _______________________________________________
> Xen-api mailing list
> Xen-api [at] lists
> http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api

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