[ovirt-users] Diagnosing Migration Error

Nir Soffer nsoffer at redhat.com
Fri Mar 18 19:37:50 UTC 2016 

On Fri, Mar 18, 2016 at 9:27 PM, Nir Soffer <nsoffer at redhat.com> wrote:
> On Fri, Mar 18, 2016 at 7:59 PM, Charles Tassell <charles at islandadmin.ca> wrote:
>> Hi Martin,
>>
>>   Thanks, I checked that log and found the error " AttributeError:
>> 'SourceThread' object has no attribute '_destServer'" which from what I see
>> from my googling was supposedly fixed...  I'm running
>> vdsm-4.17.23-0.el7.centos.noarch which I believe is the latest.  The full
>> error is:
>>
>> Thread-2789::DEBUG::2016-03-18
>> 14:47:04,200::blockSD::422::Storage.Misc.excCmd::(getReadDelay)
>> /usr/bin/taskset --cpu-list 0-23 /usr/bin/dd
>> if=/dev/383a1e7d-8b86-4a50-8bc3-e4374c57a3e5/metadata iflag=direct
>> of=/dev/null bs=4096 count=1 (cwd None)
>> Thread-2789::DEBUG::2016-03-18
>> 14:47:04,211::blockSD::422::Storage.Misc.excCmd::(getReadDelay) SUCCESS:
>> <err> = '1+0 records in\n1+0 records out\n4096 bytes (4.1 kB) copied,
>> 0.000377289 s, 10.9 MB/s\n'; <rc> = 0
>> mailbox.SPMMonitor::DEBUG::2016-03-18
>> 14:47:04,999::storage_mailbox::735::Storage.Misc.excCmd::(_checkForMail)
>> /usr/bin/taskset --cpu-list 0-23 dd
>> if=/rhev/data-center/00000001-0001-0001-0001-0000000002e9/mastersd/dom_md/inbox
>> iflag=direct,fullblock count=1 bs=1024000 (cwd None)
>> mailbox.SPMMonitor::DEBUG::2016-03-18
>> 14:47:05,015::storage_mailbox::735::Storage.Misc.excCmd::(_checkForMail)
>> SUCCESS: <err> = '1+0 records in\n1+0 records out\n1024000 bytes (1.0 MB)
>> copied, 0.0057206 s, 179 MB/s\n'; <rc> = 0
>> jsonrpc.Executor/0::DEBUG::2016-03-18
>> 14:47:06,551::__init__::503::jsonrpc.JsonRpcServer::(_serveRequest) Calling
>> 'VM.migrate' in bridge with {u'params': {u'tunneled': u'false',
>> u'autoConverge': u'false', u'src': u'ovirt-01.virt.roblib.upei.ca', u'dst':
>> u'ovirt-02.virt.roblib.upei.ca:54321', u'vmId':
>> u'2be4938e-f4a3-4322-bae3-8a9628b81835', u'abortOnError': u'true',
>> u'compressed': u'false', u'method': u'online'}, u'vmID':
>> u'2be4938e-f4a3-4322-bae3-8a9628b81835'}
>> jsonrpc.Executor/0::DEBUG::2016-03-18 14:47:06,552::API::546::vds::(migrate)
>> {u'tunneled': u'false', u'autoConverge': u'false', u'src':
>> u'ovirt-01.virt.roblib.upei.ca', u'dst':
>> u'ovirt-02.virt.roblib.upei.ca:54321', u'vmId':
>> u'2be4938e-f4a3-4322-bae3-8a9628b81835', u'abortOnError': u'true',
>> u'compressed': u'false', u'method': u'online'}
>> jsonrpc.Executor/0::DEBUG::2016-03-18
>> 14:47:06,555::__init__::206::jsonrpc.Notification::(emit) Sending event
>> {"params": {"2be4938e-f4a3-4322-bae3-8a9628b81835": {"status": "Migration
>> Source"}, "notify_time": 4311153220}, "jsonrpc": "2.0", "method":
>> "|virt|VM_status|2be4938e-f4a3-4322-bae3-8a9628b81835"}
>> jsonrpc.Executor/0::DEBUG::2016-03-18
>> 14:47:06,555::__init__::533::jsonrpc.JsonRpcServer::(_serveRequest) Return
>> 'VM.migrate' in bridge with True
>> Thread-41096::ERROR::2016-03-18
>> 14:47:06,559::migration::208::virt.vm::(_recover)
>> vmId=`2be4938e-f4a3-4322-bae3-8a9628b81835`::[Errno -2] Name or service not
>> known
>> Thread-41096::ERROR::2016-03-18
>> 14:47:06,559::migration::213::virt.vm::(_recover)
>> vmId=`2be4938e-f4a3-4322-bae3-8a9628b81835`::Failed to destroy remote VM
>> Traceback (most recent call last):
>>   File "/usr/share/vdsm/virt/migration.py", line 211, in _recover
>>     self._destServer.destroy(self._vm.id)
>> AttributeError: 'SourceThread' object has no attribute '_destServer'
>> Thread-41096::DEBUG::2016-03-18
>> 14:47:06,560::__init__::206::jsonrpc.Notification::(emit) Sending event
>> {"params": {"2be4938e-f4a3-4322-bae3-8a9628b81835": {"status": "Migration
>> Source"}, "notify_time": 4311153220}, "jsonrpc": "2.0", "method":
>> "|virt|VM_status|2be4938e-f4a3-4322-bae3-8a9628b81835"}
>> Thread-41096::ERROR::2016-03-18 14:47:06,560::migration::309::virt.vm::(run)
>> vmId=`2be4938e-f4a3-4322-bae3-8a9628b81835`::Failed to migrate
>> Traceback (most recent call last):
>>   File "/usr/share/vdsm/virt/migration.py", line 278, in run
>>     self._setupVdsConnection()
>>   File "/usr/share/vdsm/virt/migration.py", line 143, in _setupVdsConnection
>>     client = self._createClient(port)
>>   File "/usr/share/vdsm/virt/migration.py", line 130, in _createClient
>>     self.remoteHost, int(port), sslctx)
>>   File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 1269, in
>> create_connected_socket
>>     sock.connect((host, port))
>>   File "/usr/lib64/python2.7/site-packages/M2Crypto/SSL/Connection.py", line
>> 181, in connect
>>     self.socket.connect(addr)
>>   File "/usr/lib64/python2.7/socket.py", line 224, in meth
>>     return getattr(self._sock,name)(*args)
>> gaierror: [Errno -2] Name or service not known
>
> This looks like a bug in the current code (looking in 4.0 development code).

Correction, this is fixed in 4.0, but broken in latest 3.6 (v4.17.24).

This issue was fixed in https://gerrit.ovirt.org/52897, but not backported
to 3.6.

>
> 1. We try to connect to the remote host:
> 2. Connectioin fails with DNS resolving error
> 3. self._destServer is not initialized becuase of 2
> 4. Code in _recover fail when access self._destServer
>
> We should fix the initialization to avoid this error, but it will fix
> your issue, which is
> DNS error.
>
> Maybe the address of the destination vm is wrong, or you have DNS issues in your
> environment?
>
> Adding Francesco.
>
> Nir
>
>>
>>
>> On 16-03-18 01:22 PM, Martin Sivak wrote:
>>>
>>> Hi Charles,
>>>
>>> you can probably get much more detailed explanation from the vdsm and
>>> libvirt logs from the two hosts. Take a look at
>>> /var/log/vdsm/vdsm.log.
>>>
>>> Best regards
>>>
>>> Martin Sivak
>>> SLA / oVirt
>>>
>>>
>>> On Fri, Mar 18, 2016 at 3:37 PM, Charles Tassell <charles at islandadmin.ca>
>>> wrote:
>>>>
>>>> Hello,
>>>>
>>>>    I'm trying to test migrating a VM from one host to another and it's
>>>> failing, but with no apparent error message.  I took a look at the server
>>>> logs (which I've copied below) but there doesn't seem to be anything in
>>>> here
>>>> that would help track down the problem.  Should I be looking somewhere
>>>> besides engine.log on the hosted engine? This is the latest version of
>>>> oVirt
>>>> (3.6.3.4-1.el7.centos) that I just upgraded this morning.  The VM has an
>>>> ISO
>>>> attached over NFS storage and the disk image is on fiber channel.
>>>>
>>>> 2016-03-18 14:31:18,913 INFO
>>>> [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (default task-25)
>>>> [549545f2] Lock Acquired to object
>>>> 'EngineLock:{exclusiveLocks='[2be4938e-f4a3-4322-bae3-8a9628b81835=<VM,
>>>> ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName cdTest02>]',
>>>> sharedLocks='null'}'
>>>> 2016-03-18 14:31:19,131 INFO
>>>> [org.ovirt.engine.core.bll.MigrateVmToServerCommand]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] Running command:
>>>> MigrateVmToServerCommand internal: false. Entities affected :  ID:
>>>> 2be4938e-f4a3-4322-bae3-8a9628b81835 Type: VMAction group MIGRATE_VM with
>>>> role type USER
>>>> 2016-03-18 14:31:19,186 INFO
>>>> [org.ovirt.engine.core.vdsbroker.MigrateVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] START, MigrateVDSCommand(
>>>> MigrateVDSCommandParameters:{runAsync='true',
>>>> hostId='cbfd733b-8ced-487d-8754-a2217ce1210f',
>>>> vmId='2be4938e-f4a3-4322-bae3-8a9628b81835',
>>>> srcHost='ovirt-01.virt.roblib.upei.ca',
>>>> dstVdsId='1200a78f-6d05-4e5e-9ef7-6798cf741310',
>>>> dstHost='ovirt-02.virt.roblib.upei.ca:54321', migrationMethod='ONLINE',
>>>> tunnelMigration='false', migrationDowntime='0', autoConverge='false',
>>>> migrateCompressed='false', consoleAddress='null'}), log id: 8f303ba
>>>> 2016-03-18 14:31:19,188 INFO
>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] START,
>>>> MigrateBrokerVDSCommand(HostName = oVirt-01,
>>>> MigrateVDSCommandParameters:{runAsync='true',
>>>> hostId='cbfd733b-8ced-487d-8754-a2217ce1210f',
>>>> vmId='2be4938e-f4a3-4322-bae3-8a9628b81835',
>>>> srcHost='ovirt-01.virt.roblib.upei.ca',
>>>> dstVdsId='1200a78f-6d05-4e5e-9ef7-6798cf741310',
>>>> dstHost='ovirt-02.virt.roblib.upei.ca:54321', migrationMethod='ONLINE',
>>>> tunnelMigration='false', migrationDowntime='0', autoConverge='false',
>>>> migrateCompressed='false', consoleAddress='null'}), log id: 792d7e9e
>>>> 2016-03-18 14:31:19,455 INFO
>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] FINISH,
>>>> MigrateBrokerVDSCommand, log id: 792d7e9e
>>>> 2016-03-18 14:31:19,470 INFO
>>>> [org.ovirt.engine.core.vdsbroker.MigrateVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] FINISH, MigrateVDSCommand,
>>>> return: MigratingFrom, log id: 8f303ba
>>>> 2016-03-18 14:31:19,498 INFO
>>>> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
>>>> (org.ovirt.thread.pool-8-thread-45) [549545f2] Correlation ID: 549545f2,
>>>> Job
>>>> ID: 3f97f737-d32a-4ffa-b213-122dcd3ca048, Call Stack: null, Custom Event
>>>> ID:
>>>> -1, Message: Migration started (VM: cdTest02, Source: oVirt-01,
>>>> Destination:
>>>> oVirt-02, User: admin at internal).
>>>> 2016-03-18 14:31:28,055 INFO [org.ovirt.engine.core.vdsbroker.VmAnalyzer]
>>>> (DefaultQuartzScheduler_Worker-39) [] VM
>>>> '2be4938e-f4a3-4322-bae3-8a9628b81835'(cdTest02) moved from
>>>> 'MigratingFrom'
>>>> --> 'Up'
>>>> 2016-03-18 14:31:28,055 INFO [org.ovirt.engine.core.vdsbroker.VmAnalyzer]
>>>> (DefaultQuartzScheduler_Worker-39) [] Adding VM
>>>> '2be4938e-f4a3-4322-bae3-8a9628b81835' to re-run list
>>>> 2016-03-18 14:31:28,114 ERROR
>>>> [org.ovirt.engine.core.vdsbroker.VmsMonitoring]
>>>> (DefaultQuartzScheduler_Worker-39) [] Rerun VM
>>>> '2be4938e-f4a3-4322-bae3-8a9628b81835'. Called from VDS 'oVirt-01'
>>>> 2016-03-18 14:31:28,202 INFO
>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-46) [] START,
>>>> MigrateStatusVDSCommand(HostName = oVirt-01,
>>>> MigrateStatusVDSCommandParameters:{runAsync='true',
>>>> hostId='cbfd733b-8ced-487d-8754-a2217ce1210f',
>>>> vmId='2be4938e-f4a3-4322-bae3-8a9628b81835'}), log id: 618baaa6
>>>> 2016-03-18 14:31:29,209 INFO
>>>> [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand]
>>>> (org.ovirt.thread.pool-8-thread-46) [] FINISH, MigrateStatusVDSCommand,
>>>> log
>>>> id: 618baaa6
>>>> 2016-03-18 14:31:29,250 ERROR
>>>> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
>>>> (org.ovirt.thread.pool-8-thread-46) [] Correlation ID: 549545f2, Job ID:
>>>> 3f97f737-d32a-4ffa-b213-122dcd3ca048, Call Stack: null, Custom Event ID:
>>>> -1,
>>>> Message: Migration failed  (VM: cdTest02, Source: oVirt-01, Destination:
>>>> oVirt-02).
>>>> 2016-03-18 14:31:29,262 INFO
>>>> [org.ovirt.engine.core.bll.MigrateVmToServerCommand]
>>>> (org.ovirt.thread.pool-8-thread-46) [] Lock freed to object
>>>> 'EngineLock:{exclusiveLocks='[2be4938e-f4a3-4322-bae3-8a9628b81835=<VM,
>>>> ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName cdTest02>]',
>>>> sharedLocks='null'}'
>>>> _______________________________________________
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>>>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
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