Re: [fedora-virt] libvirt configuration for cluster of qemu/kvm hosts

[Dwight Hubbard]

The question I keep bumping into is where are the cluster resource scripts for 
libvirt or kvm virtual machines.  Migration is nice, but it doesn't do much 
good in the event a server decides to up and die instead of going down 
cleanly...

On Monday 20 July 2009 01:45:56 Gianluca Cecchi wrote:
>  Hello,
>  is there any pointer about how to set up a cluster of Qemu/KVM hosts?
>  I'm on F11 x86_64 for the hosts.
>  I read requirements for KVM migration in general highlighted at
>  http://www.linux-kvm.org/page/Migration but I keep having doubts, in
>  particular regarding libvirt configuration in cluster environments...
>  Some questions about libvirt configuration:
>  - /etc/libvirt/qemu/networks
>  do the files inside here be identical between hosts (default.xml and
>  other custom configured network ones)?
>  What are the uuid tags into the xml for? Do they have to be identical
>  for clusters or do they have to be absolutely different for a sort of
>  "identification" of host (as the term seems to suggest)?
>  If I have guests that use virbr0 and use dhcp for their network
>  config, and want two different qemu/kvm hosts able to migrate these
>  guests between them,  need to have same config or what?
>  - the same for storage configuration and other parameters.
>
>  Suppose I clone a pre-config F11 host configured with libvirt, and
>  suppose I have to differentiate uuid for networks/storage (see
>  questions above), do I have a method to regenerate these uuid values
>  inside xml files?
>
>  Thanks in advance for any pointer.
>  Gianluca
>
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Dwight Hubbard
Principal Consultant
Effective Automation Solutions
Website: http://effectiveautomationsolutions.com 
Email: dwight.hubbard(a)efausol.com 
Phone: [phone]
Redhat Certified Engineer - RHCE #804007137224095
VMware Certified Professional - VCP #18529