Hi list,
Is there any function in libvirt to determine runlevel of host or any
possibility to prevent VM migrations to that host ?
I'm developing simple cluster of 4 servers running KVM VMs. For
management I decided to use python-libvirt. It is working in that way,
that every VM is diskless and booting via PXE so I can run it on every
host server. Every VM has assigned one host as monitor which is
responsible to periodically check, that VM is running on one of other
hosts. If it don't run, it will be started on first available server
assigned for that VM. When one of hosts is shut down, it will migrate
all VMs to another hosts, but that monitor which checks VMs will migrate
it after reboot. But I have race condition there that monitors can check
that host is running before it is shutdown and will migrate VM's back to
server which will reboot.
Thank you for any help
--
Ondřej Kunc, Senior Linux Administrator
IGNUM s.r.o., Vinohradská 190, Praha 3, 130 61, CZE
Mobil: +420 603 111 111 | Fax: +420 296 332 222
www.ignum.cz | www.domena.cz | www.webcloud.cz
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