[ovirt-users] VM switched off when migration for host maintenance fails

[Eduardo Mayoral]

Hi,

    An interesting thing just happened on my oVirt deployment.

    While setting a host for maintenance, one of the VMs running on that
host failed to migrate. Then ovirt-engine for some reason turned the VM
off. Here are the relevant log lines from engine.log:




2017-03-16 09:56:23,324Z INFO 
[org.ovirt.engine.core.bll.MigrateVmCommand] (default task-60)
[61a52216] Lock Acquired to object
'EngineLock:{exclusiveLocks='[422663a9-d712-4992-7c81-165b2976073e=<VM,
ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName
entorno127.arsysdesarrollo.lan>]', sharedLocks='null'}'
2017-03-16 09:56:23,957Z INFO 
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(default task-60) [61a52216] EVENT_ID:
VM_MIGRATION_START_SYSTEM_INITIATED(67), Correlation ID: 61a52216, Job
ID: fbc5e0d7-4618-4ca8-b7a7-0fd9a43f490f, Call Stack: null, Custom Event
ID: -1, Message: Migration initiated by system (VM:
entorno127.arsysdesarrollo.lan, Source: llkk594.arsyslan.es,
Destination: llkk593.arsyslan.es, Reason: Host preparing for maintenance).
2017-03-16 09:56:26,818Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler10) [7c6c403b-0a82-47aa-aeb4-57fbe06e20e1] VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
was unexpectedly detected as 'MigratingTo' on VDS
'43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es) (expected on
'11a82467-afa4-4e4e-bd92-3383082d0a5e')
2017-03-16 09:56:42,149Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler10) [fac8ade9-a867-4ff7-aac5-912f78cc3bb5] VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
was unexpectedly detected as 'MigratingTo' on VDS
'43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es) (expected on
'11a82467-afa4-4e4e-bd92-3383082d0a5e')
2017-03-16 09:56:54,755Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler3) [54fa9a1b-fddb-4812-b5d2-06cf92834709] VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
moved from 'MigratingFrom' --> 'Down'
2017-03-16 09:56:54,755Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler3) [54fa9a1b-fddb-4812-b5d2-06cf92834709] Handing
over VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
to Host '43f43ec5-e51d-400d-8569-261c98382e3a'. Setting VM to status
'MigratingTo'
2017-03-16 09:56:58,160Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler4) [dd4ea7bb-85bc-410e-9a8f-357c28d85d1c] VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
is running in db and not running on VDS
'43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es)
2017-03-16 09:56:58,161Z INFO 
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer]
(DefaultQuartzScheduler4) [dd4ea7bb-85bc-410e-9a8f-357c28d85d1c] add VM
'422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan)
to rerun treatment
  turn to maintenance while VMs are still running on it.(VM:
entorno127.arsysdesarrollo.lan, Source: llkk594.arsyslan.es,
Destination: llkk593.arsyslan.es).
2017-03-16 09:56:59,193Z INFO 
[org.ovirt.engine.core.bll.MigrateVmCommand]
(org.ovirt.thread.pool-7-thread-27) [14d40a88] Lock freed to object
'EngineLock:{exclusiveLocks='[422663a9-d712-4992-7c81-165b2976073e=<VM,
ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName
entorno127.arsysdesarrollo.lan>]', sharedLocks='null'}'

Now, I understand an VM migration may fail for a number of reasons, but
in that case, shouldn't the VM keep running on the source host? I do not
quite understand what happened here or how to avoid it in the future.

Best regards,

-- 
Eduardo Mayoral Jimeno (emayoral at arsys.es)
Administrador de sistemas. Departamento de Plataformas. Arsys internet.
+34 941 620 145 ext. 5153