Hi,

Yes, just as Alex explained, if the disk has been created as thin
provisioning, the vdsm will extends once a watermark is reached.
Usually it should not get to the state the Vm is paused.

>From the log, you can see that the request for extension has been sent
before the VM got to the No Space Error.
Later, we can see the VM resuming.

INFO::2016-04-13 10:52:04,182::vm::1026::virt.vm::(extendDrivesIfNeeded)
vmId=`f9cd282e-110a-4896-98d3-6d320662744d`::Requesting extension for volume
....
INFO::2016-04-13 10:52:29,360::vm::3728::virt.vm::(onIOError)
vmId=`f9cd282e-110a-4896-98d3-6d320662744d`::abnormal vm stop device
virtio-disk0 error enospc
....
INFO::2016-04-13 10:52:54,317::vm::5084::virt.vm::(_logGuestCpuStatus)
vmId=`f9cd282e-110a-4896-98d3-6d320662744d`::CPU running: onResume


Note that the extension is done on the SPM host, so it would be interesting
to see the vdsm log from the host that was in SPM role at this timeframe.

Regards,

Fred


On Wed, Apr 13, 2016 at 2:43 PM, Alex Crow <ac...@integrafin.co.uk> wrote:

> Hi,
>
> If you have set up VM disks as Thin Provisioned, the VM has to pause when
> the disk image needs to expand. You won't see this on VMs with preallocated
> storage.
>
> It's not the SAN that's running out of space, it's the VM image needing to
> be expanded incrementally each time.
>
> Cheers
>
> Alex
>
>
> On 13/04/16 12:04, nico...@devels.es wrote:
>
> Hi Fred,
>
> This is an iSCSI storage. I'm attaching the VDSM logs from the host where
> this machine has been running. Should you need any further info, don't
> hesitate to ask.
>
> Thanks.
>
> Regards.
>
> El 2016-04-13 11:54, Fred Rolland escribió:
>
> Hi,
>
> What kind of storage do you have ? (ISCSI,FC,NFS...)
> Can you provide the vdsm logs from the host where this VM runs ?
>
> Thanks,
>
> Freddy
>
> On Wed, Apr 13, 2016 at 1:02 PM, <nico...@devels.es> <nico...@devels.es>
> wrote:
>
> Hi,
>
> We're running oVirt 3.6.4.1-1. Lately we're seeing a bunch of
> events like these:
>
> 2016-04-13 10:52:30,735 INFO
> [org.ovirt.engine.core.vdsbroker.VmAnalyzer]
> (DefaultQuartzScheduler_Worker-86) [60dea18f] VM
> 'f9cd282e-110a-4896-98d3-6d320662744d'(vm.domain.com [1]) moved from
> 'Up' --> 'Paused'
> 2016-04-13 10:52:30,815 INFO
>
> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
>
> (DefaultQuartzScheduler_Worker-86) [60dea18f] Correlation ID: null,
> Call Stack: null, Custom Event ID: -1, Message: VM vm.domain.com [1]
> has been paused.
> 2016-04-13 10:52:30,898 ERROR
>
> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
>
> (DefaultQuartzScheduler_Worker-86) [60dea18f] Correlation ID: null,
> Call Stack: null, Custom Event ID: -1, Message: VM vm.domain.com [1]
> has been paused due to no Storage space error.
> 2016-04-13 10:52:52,320 WARN
> [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData]
> (org.ovirt.thread.pool-8-thread-38) [] domain
> '5de4a000-a9c4-489c-8eee-10368647c413:iscsi01' in problem. vds:
> 'host6.domain.com [2]'
> 2016-04-13 10:52:55,183 INFO
> [org.ovirt.engine.core.vdsbroker.VmAnalyzer]
> (DefaultQuartzScheduler_Worker-70) [3da0f3d4] VM
> 'f9cd282e-110a-4896-98d3-6d320662744d'(vm.domain.com [1]) moved from
> 'Paused' --> 'Up'
> 2016-04-13 10:52:55,318 INFO
>
> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
>
> (DefaultQuartzScheduler_Worker-70) [3da0f3d4] Correlation ID: null,
> Call Stack: null, Custom Event ID: -1, Message: VM vm.domain.com [1]
> has recovered from paused back to up.
>
> The storage domain is far from being full, though (400+ G available
> right now). Could this be related to this other issue [1]? If not,
> how could I debug what's going on?
>
> Thanks.
>
>  [1]: https://www.mail-archive.com/users@ovirt.org/msg32079.html
> [3]
> _______________________________________________
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> Links:
> ------
> [1] http://vm.domain.com
> [2] http://host6.domain.com
> [3] https://www.mail-archive.com/users@ovirt.org/msg32079.html
> [4] http://lists.ovirt.org/mailman/listinfo/users
>
>
>
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