Re: [ovirt-users] VM has been paused due to no Storage space error.

From the log, we can see that the lvextend command took 18 sec, which is quite long.

60decf0c-6d9a-4c3b-bee6-de9d2ff05e85::DEBUG::2016-04-13 10:52:06,759::lvm::290::Storage.Misc.excCmd::(cmd) /usr/bin/taskset --cpu-list 0-23 /usr/bin/sudo -n /usr/sbin/lvm lvextend --config ' devices { preferred_names = ["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 filter = [ '\''a|/dev/mapper/36000eb3a4f1acbc20000000000000043|'\'', '\''r|.*|'\'' ] } global { locking_type=1 prioritise_write_locks=1 wait_for_locks=1 use_lvmetad=0 } backup { retain_min = 50 retain_days = 0 } ' --autobackup n --size 6016m 5de4a000-a9c4-489c-8eee-10368647c413/721d09bc-60e7-4310-9ba2-522d2a4b03d0 (cwd None) .... 60decf0c-6d9a-4c3b-bee6-de9d2ff05e85::DEBUG::2016-04-13 10:52:22,217::lvm::290::Storage.Misc.excCmd::(cmd) SUCCESS: <err> = ' WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it!\n WARNING: This metadata update is NOT backed up\n'; <rc> = 0 The watermark can be configured by the following value: 'volume_utilization_percent', '50', 'Together with volume_utilization_chunk_mb, set the minimal free ' 'space before a thin provisioned block volume is extended. Use ' 'lower values to extend earlier.') On Thu, Apr 14, 2016 at 11:42 AM, Michal Skrivanek <michal.skrivanek(a)redhat.com&gt; wrote: > > > > On 14 Apr 2016, at 09:57, nicolas(a)devels.es wrote: > > > > Ok, that makes sense, thanks for the insight both Alex and Fred. I'm > > attaching the VDSM log of the SPM node at the time of the pause. I couldn't > > find anything that would clearly identify the problem, but maybe you'll be > > able to. > > In extreme conditions it will happen. When your storage is slow to respond > to extension request, and when your write rate is very high then it may > happen, as it is happening to you, that you run out space sooner than the > extension finishes. You can change the watermark value I guess(right, > Fred?), but better would be to plan a bit more ahead and either use > preallocated or create thin and then allocate expected size in advance > before the operation causing it (typically it only happens during untarring > gigabytes of data, or huge database dump/restore) > Even then, the VM should always be automatially resumed once the disk > space is allocated > > Thanks, > michal > > > > > Thanks. > > > > Regards. > > > > El 2016-04-13 13:09, Fred Rolland escribió: > >> 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 <acrow(a)integrafin.co.uk&gt; > >> 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, nicolas(a)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, <nicolas(a)devels.es&gt; 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] [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] [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] [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] [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] [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] [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] > >>> [3] > >>> _______________________________________________ > >>> Users mailing list > >>> Users(a)ovirt.org > >>> http://lists.ovirt.org/mailman/listinfo/users [4] [4] > >>> Links: > >>> ------ > >>> [1] http://vm.domain.com [1] > >>> [2] http://host6.domain.com [2] > >>> [3] https://www.mail-archive.com/users@ovirt.org/msg32079.html [3] > >>> [4] http://lists.ovirt.org/mailman/listinfo/users [4] > >> _______________________________________________ > >> Users mailing list > >> Users(a)ovirt.org > >> http://lists.ovirt.org/mailman/listinfo/users [4] > >> -- > >> This message is intended only for the addressee and may contain > >> confidential information. 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