From: Andrew Cathrow <acathrow@redhat.com>
To: Riccardo Veraldi <Riccardo.Veraldi@cnaf.infn.it>
Cc: kvm@vger.kernel.org
Subject: Re: live migration problems.
Date: Fri, 30 Mar 2012 17:58:25 -0400 (EDT) [thread overview]
Message-ID: <29021590.158.1333144756986.JavaMail.acathrow@0.0.0.0> (raw)
In-Reply-To: <4F76298B.4020804@cnaf.infn.it>
----- Original Message -----
> From: "Riccardo Veraldi" <Riccardo.Veraldi@cnaf.infn.it>
> To: kvm@vger.kernel.org
> Sent: Friday, March 30, 2012 5:45:47 PM
> Subject: live migration problems.
>
> Hello,
> I have problems with live migration.
> I have several VMs in a CentOS 6.2 cluster environment.
>
> When I migrate one virtual machine from nodeA to nodeB the migration
> goes smoothly but
> in the same time the VM is migrated an external ping cannot reach the
> VM.
> I ping the VM before migration and after the migration is done ping
> stops to work.
> This happens for some VM and does not happen for other VM.
> Apparently the VM are configured the same way so I can't understand
> why
> this is happening.
> If I migrate the VM back to the original physical node the ping start
> working again like if the switch did not
> realize the VM mac address changed switch port.
> To make things work always I Should make a ping from the VM console
> to
> whatever host and
> in this case the arp table is updated on the switch.
> The strange thing as I said is that some VM seems to always work
> after
> migration while other
> seems never to work untl they are migrated back to original cluster
> node.
> Any hints or suggestions ?
Make sure you have DELAY=0 set in the ifcfg file for the bridge on both hosts.
>
> thank you very much
>
> Rick
>
> --
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>
next prev parent reply other threads:[~2012-03-30 21:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-30 21:45 live migration problems Riccardo Veraldi
2012-03-30 21:58 ` Andrew Cathrow [this message]
2012-03-31 12:25 ` Riccardo Veraldi
2012-03-31 12:35 ` Riccardo Veraldi
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