10.10.2016 15:11, Klaus Wenninger:
On 10/10/2016 02:00 PM, Pavel Levshin wrote:
10.10.2016 14:32, Klaus Wenninger:
Why are the order-constraints between libvirt & vms optional?
If they were mandatory, then all the virtual machines would be
restarted when libvirtd restarts. This is not desired nor needed. When
this happens, the node is fenced because it is unable to restart VM in
absence of working libvirtd.
Was guessing something like that ...
So let me reformulate my question:
Why does libvirtd have to be restarted?
If it is because of config-changes making it reloadable might be a
solution ...
Right, config changes come to my mind first of all. But sometimes a
service, including libvirtd, may fail unexpectedly. In this case I would
prefer to restart it without disturbing VirtualDomains, which will fail
eternally.
The question is, why the cluster does not obey optional constraint, when
both libvirtd and VM stop in a single transition?
In my eyes, these services are bound by a HARD obvious colocation
constraint: VirtualDomain should never ever be touched in absence of
working libvirtd. Unfortunately, I cannot figure out a way to reflect
this constraint in the cluster.
--
Pavel Levshin
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