Re: [fedora-virt] KVM high available

[Dor Laor]

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(a)sjolshagen.net <mailto:[e-mail]>> wrote:
>
>      On Fri, 14 Jan 2011 14:19:52 -0300, iarly selbir <iarlyy(a)gmail.com
>      <mailto:[e-mail]>> 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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