[ClusterLabs] Antw: Re: Antw: Re: Early VM resource migration

[Ulrich Windl]

>>> Klechomir <klecho at gmail.com> schrieb am 17.12.2015 um 14:16 in Nachricht
<2102747.TPh6pTdk8c at bobo>:
> Hi Ulrich,
> This is only a part of the config, which concerns the problem.
> Even with dummy resources, the behaviour will be identical, so don't think 
> that dlm/clvmd res. config will help solving the problem.

You could send logs with the actual startup sequence then.

> 
> Regards,
> KIecho
> 
> On 17.12.2015 08:19:43 Ulrich Windl wrote:
>> >>> Klechomir <klecho at gmail.com> schrieb am 16.12.2015 um 17:30 in Nachricht
>> 
>> <5671918E.40209 at gmail.com>:
>> > On 16.12.2015 17:52, Ken Gaillot wrote:
>> >> On 12/16/2015 02:09 AM, Klechomir wrote:
>> >>> Hi list,
>> >>> I have a cluster with VM resources on a cloned active-active storage.
>> >>> 
>> >>> VirtualDomain resource migrates properly during failover (node standby),
>> >>> but tries to migrate back too early, during failback, ignoring the
>> >>> "order" constraint, telling it to start when the cloned storage is up.
>> >>> This causes unnecessary VM restart.
>> >>> 
>> >>> Is there any way to make it wait, until its storage resource is up?
>> >> 
>> >> Hi Klecho,
>> >> 
>> >> If you have an order constraint, the cluster will not try to start the
>> >> VM until the storage resource agent returns success for its start. If
>> >> the storage isn't fully up at that point, then the agent is faulty, and
>> >> should be modified to wait until the storage is truly available before
>> >> returning success.
>> >> 
>> >> If you post all your constraints, I can look for anything that might
>> >> affect the behavior.
>> > 
>> > Thanks for the reply, Ken
>> > 
>> > Seems to me that that the constraints for a cloned resources act a a bit
>> > different.
>> > 
>> > Here is my config:
>> > 
>> > primitive p_AA_Filesystem_CDrive1 ocf:heartbeat:Filesystem \
>> > 
>> >          params device="/dev/CSD_CDrive1/AA_CDrive1"
>> > 
>> > directory="/volumes/AA_CDrive1" fstype="ocfs2" options="rw,noatime"
>> > primitive VM_VM1 ocf:heartbeat:VirtualDomain \
>> > 
>> >          params config="/volumes/AA_CDrive1/VM_VM1/VM1.xml"
>> > 
>> > hypervisor="qemu:///system" migration_transport="tcp" \
>> > 
>> >          meta allow-migrate="true" target-role="Started"
>> > 
>> > clone AA_Filesystem_CDrive1 p_AA_Filesystem_CDrive1 \
>> > 
>> >          meta interleave="true" resource-stickiness="0"
>> > 
>> > target-role="Started"
>> > order VM_VM1_after_AA_Filesystem_CDrive1 inf: AA_Filesystem_CDrive1 VM_VM1
>> > 
>> > Every time when a node comes back from standby, the VM tries to live
>> > migrate to it long before the filesystem is up.
>> 
>> Hi!
>> 
>> To me your config looks rather incomplete: What about DLM, O2CB, cLVM, etc.?
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