[ClusterLabs] Antw: Re: VirtualDomain started in two hosts

[Oscar Segarra]

Yes... you are right... but If I migrate vm manually by "virsh migrate" is
expected the cluster to monitorize where guests are running on...

What happens If I stop pacemaker and corosync services in all nodes and I
start them again... ¿will I have all guests running twice?

Thanks a lot

2017-01-17 15:52 GMT+01:00 Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de>:

> >>> Oscar Segarra <oscar.segarra at gmail.com> schrieb am 17.01.2017 um
> 10:15 in
> Nachricht
> <CAJq8taG8VhX5J1xQpqMRQ-9omFNXKHQs54mBzz491_6df9akzA at mail.gmail.com>:
> > Hi,
> >
> > Yes, I will try to explain myself better.
> >
> > *Initially*
> > On node1 (vdicnode01-priv)
> >>virsh list
> > ==============
> > vdicdb01     started
> >
> > On node2 (vdicnode02-priv)
> >>virsh list
> > ==============
> > vdicdb02     started
> >
> > --> Now, I execute the migrate command (outside the cluster <-- not using
> > pcs resource move)
> > virsh migrate --live vdicdb01 qemu:/// qemu+ssh://vdicnode02-priv
> > tcp://vdicnode02-priv
>
> One of the rules of successful clustering is: If resurces are managed by
> the cluster, they are managed by the cluster only! ;-)
>
> I guess one node is trying to restart the VM once it vanished, and the
> other node might try to shut down the VM while it's being migrated.
> Or any other undesired combination...
>
> >
> > *Finally*
> > On node1 (vdicnode01-priv)
> >>virsh list
> > ==============
> > *vdicdb01     started*
> >
> > On node2 (vdicnode02-priv)
> >>virsh list
> > ==============
> > vdicdb02     started
> > vdicdb01     started
> >
> > If I query cluster pcs status, cluster thinks resource vm-vdicdb01 is
> only
> > started on node vdicnode01-priv.
> >
> > Thanks a lot.
> >
> >
> >
> > 2017-01-17 10:03 GMT+01:00 emmanuel segura <emi2fast at gmail.com>:
> >
> >> sorry,
> >>
> >> But do you mean, when you say, you migrated the vm outside of the
> >> cluster? one server out side of you cluster?
> >>
> >> 2017-01-17 9:27 GMT+01:00 Oscar Segarra <oscar.segarra at gmail.com>:
> >> > Hi,
> >> >
> >> > I have configured a two node cluster whewe run 4 kvm guests on.
> >> >
> >> > The hosts are:
> >> > vdicnode01
> >> > vdicnode02
> >> >
> >> > And I have created a dedicated network card for cluster management. I
> >> have
> >> > created required entries in /etc/hosts:
> >> > vdicnode01-priv
> >> > vdicnode02-priv
> >> >
> >> > The four guests have collocation rules in order to make them
> distribute
> >> > proportionally between my two nodes.
> >> >
> >> > The problem I have is that if I migrate a guest outside the cluster, I
> >> mean
> >> > using the virsh migrate - - live...  Cluster,  instead of moving back
> the
> >> > guest to its original node (following collocation sets),  Cluster
> starts
> >> > again the guest and suddenly I have the same guest running on both
> nodes
> >> > causing xfs corruption in guest.
> >> >
> >> > Is there any configuration applicable to avoid this unwanted behavior?
> >> >
> >> > Thanks a lot
> >> >
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> >>
> >>
> >>
> >> --
> >>   .~.
> >>   /V\
> >>  //  \\
> >> /(   )\
> >> ^`~'^
> >>
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>
>
>
>
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