[fedora-virt] KVM high available

[wariola at gmail.com]

I think u can use cluster suite and fence towards Libvirt as a fencing
device.

(Tho I just know the theory, never tried it myself)

-wariola-

On Mon, Jan 17, 2011 at 4:17 PM, Dor Laor <dlaor at redhat.com> wrote:

> On 01/14/2011 08:34 PM, iarly selbir wrote:
> > Sorry, I forgot to mentions it, Yes I have this configuration two
> > failover domain, first with host-1 on top, and other with host-2 on top.
> >
> > My question is, how you guys are configuring your guests resources to
> > failover from on hosts to another, remembering that I have same machines
> > on two kvm hosts, i.e. kvm001 has guest001 on, and kvmsrv002 has
> > guest001 ( It must be powered on just in fail of guest0001 on kvm001)
>
> Using hearbeat/light cluster mgmt ala Linux HA package might be a good
> option for you.
>
> >
> > I hope being clear enough.
> >
> > Thank you so much.
> >
> > - -
> > iarlyy selbir
> >
> > :wq!
> >
> >
> >
> > On Fri, Jan 14, 2011 at 3:18 PM, Thomas Sjolshagen
> > <thomas at sjolshagen.net <mailto:thomas at sjolshagen.net>> wrote:
> >
> >     On Fri, 14 Jan 2011 14:19:52 -0300, iarly selbir <iarlyy at gmail.com
> >     <mailto:iarlyy at gmail.com>> wrote:
> >
> >>     Hi there,
> >>     Hi I'm joining today an would like to share my knowledge with
> >>     virtualization and get more = )
> >>     when KVM-HOST-001 fail, the KVM-HOST-002 take over all machines
> >>     from other host, I'm sharing a storage volume between two nodes
> >>     (gfs2), so all hosts can see the guest images, but how to
> >>     configure the clusters resources to migrate the guests? this is my
> >>     question and any suggestions will be appreciated.
> >     Assuming you're using libvirt to manage the VM's (guests), I'd
> >     configure them as <vm> resources in rgmanager and make them members
> >     of a failover group with the highest (shows up as the lowest
> >     priority number in the example) priority to the KVM-HOST-* you want
> >     the guest to start on (if it's available).
> >     A couple of (example) <vm> resource I have configured in my 2-node
> >     GFS2 based KVM cluster (some of the info in the vm resource tag is
> >     actually not necessary, but I was both experimenting and playing it
> >     safe when I set this up)
> >     <rm>
> >     <failoverdomains>
> >     <failoverdomain name="prefer-virt0" restricted="0" ordered="1">
> >     <failoverdomainnode name="virt0-backup" priority="10" />
> >     <failoverdomainnode name="virt1-backup" priority="20" />
> >     </failoverdomain>
> >     <failoverdomain name="prefer-virt1" restricted="0" ordered="1">
> >     <failoverdomainnode name="virt1-backup" priority="10" />
> >     <failoverdomainnode name="virt0-backup" priority="20" />
> >     </failoverdomain>
> >     </failoverdomains>
> >     <!-- VM resources -->
> >     <vm name="imap1" autostart="1" recovery="restart" migrate="live"
> >     domain="prefer-virt0" use_virsh="1" hypervisor="qemu" />
> >     <vm name="imap2" autostart="1" recovery="restart" migrate="live"
> >     domain="prefer-virt1" use_virsh="1" hypervisor="qemu" />
> >     </rm>
> >     Hope this helps to illustrate.
> >     // Thomas
> >
> >
> >
> >
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-- 
.: war|ola :.
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