Snapshot Disk fails to connect to BackupApplianceVM - Failed to HotPlugDiskVDS - Users

23 Jan 2018

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Appliance</span>VM, all works using NFS4 as my Storage Domain for the VM be=
ing backed up. If I change that disk storage on the VM to be backed up to my=
 iSCSI storage, my script breaks and I see these errors in the oVirt Engine =
logs:</div><div><br></div><div>---</div><div><div>2018-01-22 23:10:36,249-06=
 INFO  [org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (=
default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Lock Acquired to obj=
ect 'EngineLock:{exclusiveLocks=3D'[dcabf886-22b2-4239-b57a-559d9b5b4c6d=3DDISK]=
', sharedLocks=3D''}'</div><div><br></div><div>2018-01-22 23:10:36,296-06 INFO=
  [org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (defau=
lt task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Running command: AttachDi=
skToVmCommand internal: false. Entities affected :  ID: 3c78dd5a-2982-4=
e35-ad9b-004394970dea Type: VMAction group CONFIGURE_VM_STORAGE with role ty=
...
<br></div><div>2018-01-22 23:10:37,907-06 INFO  [org.ovirt.engine.core=
.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default task-58) [948cc433-45ed=
-46cc-b920-b4d9627bf99b] Command 'org.ovirt.engine.core.vdsbroker.vdsbroker.=
HotPlugDiskVDSCommand' return value 'StatusOnlyReturn [status=3DStatus [code=3D4=
5, message=3Dunsupported configuration: native I/O needs either no disk cache =
or directsync cache mode, QEMU will fallback to aio=3Dthreads]]'</div><div><br=
</div><div>2018-01-22 23:10:37,907-06 INFO  [org.ovirt.engine.core.vds=
broker.vdsbroker.HotPlugDiskVDSCommand] (default task-58) [948cc433-45ed-46c=
c-b920-b4d9627bf99b] HostName =3D ovirtnodea.mydomain.com</div><div><br></div>=
<div>2018-01-22 23:10:37,907-06 ERROR [org.ovirt.engine.core.vdsbroker.vdsbr=
oker.HotPlugDiskVDSCommand] (default task-58) [948cc433-45ed-46cc-b920-b4d96=
27bf99b] Command 'HotPlugDiskVDSCommand(HostName =3D ovirtnodea.mydomain.=
com, HotPlugDiskVDSParameters:{hostId=3D'34591e56-fd25-48dd-bf56-76b7b15e3721'=
, vmId=3D'3c78dd5a-2982-4e35-ad9b-004394970dea', diskId=3D'dcabf886-22b2-4239-b5=
7a-559d9b5b4c6d', addressMap=3D'null'})' execution failed: VDSGenericException=
: VDSErrorException: Failed to HotPlugDiskVDS, error =3D unsupported configura=
tion: native I/O needs either no disk cache or directsync cache mode, QEMU w=
ill fallback to aio=3Dthreads, code =3D 45</div><div><br></div><div>2018-01-22 2=
3:10:37,907-06 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlug=
DiskVDSCommand] (default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] FIN=
ISH, HotPlugDiskVDSCommand, log id: 1bb4b632</div><div><br></div><div>2018-0=
1-22 23:10:37,907-06 ERROR [org.ovirt.engine.core.bll.storage.disk.AttachDis=
kToVmCommand] (default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Comma=
nd 'org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand' failed: En=
gineException: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException: =
VDSGenericException: VDSErrorException: Failed to HotPlugDiskVDS, error =3D un=
supported configuration: native I/O needs either no disk cache or directsync=
 cache mode, QEMU will fallback to aio=3Dthreads, code =3D 45 (Failed with error=
 FailedToPlugDisk and code 45)</div><div><br></div><div>2018-01-22 23:10:37,=
910-06 ERROR [org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] =
(default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Transaction rolled-=
back for command 'org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmComma=
nd'.</div><div><br></div><div>2018-01-22 23:10:37,954-06 ERROR [org.ovirt.en=
gine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-58) =
[948cc433-45ed-46cc-b920-b4d9627bf99b] EVENT_ID: USER_FAILED_ATTACH_DISK_TO_=
VM(2,017), Failed to attach Disk TEST1234_Disk1 to VM SimpleBackup (User: ad=
min@internal-authz).</div><div><br></div><div>2018-01-22 23:10:37,955-06 INF=
O  [org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (defa=
...
</div><div>But I have no clue how to fix that using oVirt 4.2 on CentOS 7. =
Fresh install and all up to date.</div><div><br></div><div>Thanks for any he=
lp.</div><div><br></div><div>BTW, current script I am writing is here: =
<a href=3D"https://github.com/zipurman/oVIRT_Simple_Backup">https://github.com=
/zipurman/oVIRT_Simple_Backup</a> </div><div><br></div><div>Irc.oftc.ne=
t #ovirt</div><div>zipur</div><br></div><div><span class=3D"Apple-style-span" =
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Okay, when I do a snapshot, and then mount the snapshot to a
BackupApplianceVM, all works using NFS4 as my Storage Domain for the VM
being backed up. If I change that disk storage on the VM to be backed up to
my iSCSI storage, my script breaks and I see these errors in the oVirt
Engine logs:

---
2018-01-22 23:10:36,249-06 INFO
[org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Lock Acquired to object
'EngineLock:{exclusiveLocks=3D'[dcabf886-22b2-4239-b57a-559d9b5b4c6d=3DDISK]',
sharedLocks=3D''}'

2018-01-22 23:10:36,296-06 INFO
[org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Running command:
AttachDiskToVmCommand internal: false. Entities affected :  ID:
3c78dd5a-2982-4e35-ad9b-004394970dea Type: VMAction group
CONFIGURE_VM_STORAGE with role type USER,  ID:
dcabf886-22b2-4239-b57a-559d9b5b4c6d Type: DiskAction group ATTACH_DISK wit=
h
role type USER

2018-01-22 23:10:36,300-06 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] START,
HotPlugDiskVDSCommand(HostName =3D ovirtnodea.mydomain.com,
HotPlugDiskVDSParameters:{hostId=3D'34591e56-fd25-48dd-bf56-76b7b15e3721',
vmId=3D'3c78dd5a-2982-4e35-ad9b-004394970dea',
diskId=3D'dcabf886-22b2-4239-b57a-559d9b5b4c6d', addressMap=3D'null'}), log id:
1bb4b632

2018-01-22 23:10:37,903-06 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Failed in 'HotPlugDiskVDS'
method

2018-01-22 23:10:37,907-06 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] EVENT_ID:
VDS_BROKER_COMMAND_FAILURE(10,802), VDSM ovirtnodea.mydomain.com command
HotPlugDiskVDS failed: unsupported configuration: native I/O needs either n=
o
disk cache or directsync cache mode, QEMU will fallback to aio=3Dthreads

2018-01-22 23:10:37,907-06 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Command
'org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand' return
value 'StatusOnlyReturn [status=3DStatus [code=3D45, message=3Dunsupported
configuration: native I/O needs either no disk cache or directsync cache
mode, QEMU will fallback to aio=3Dthreads]]'

2018-01-22 23:10:37,907-06 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] HostName =3D
ovirtnodea.mydomain.com

2018-01-22 23:10:37,907-06 ERROR
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Command
'HotPlugDiskVDSCommand(HostName =3D ovirtnodea.mydomain.com,
HotPlugDiskVDSParameters:{hostId=3D'34591e56-fd25-48dd-bf56-76b7b15e3721',
vmId=3D'3c78dd5a-2982-4e35-ad9b-004394970dea',
diskId=3D'dcabf886-22b2-4239-b57a-559d9b5b4c6d', addressMap=3D'null'})'
execution failed: VDSGenericException: VDSErrorException: Failed to
HotPlugDiskVDS, error =3D unsupported configuration: native I/O needs either
no disk cache or directsync cache mode, QEMU will fallback to aio=3Dthreads,
code =3D 45

2018-01-22 23:10:37,907-06 INFO
[org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] FINISH,
HotPlugDiskVDSCommand, log id: 1bb4b632

2018-01-22 23:10:37,907-06 ERROR
[org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Command
'org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand' failed:
EngineException:=20
org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException:
VDSGenericException: VDSErrorException: Failed to HotPlugDiskVDS, error =3D
unsupported configuration: native I/O needs either no disk cache or
directsync cache mode, QEMU will fallback to aio=3Dthreads, code =3D 45 (Failed
with error FailedToPlugDisk and code 45)

2018-01-22 23:10:37,910-06 ERROR
[org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Transaction rolled-back for
command 'org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand'.

2018-01-22 23:10:37,954-06 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] EVENT_ID:
USER_FAILED_ATTACH_DISK_TO_VM(2,017), Failed to attach Disk TEST1234_Disk1
to VM SimpleBackup (User: admin@internal-authz).

2018-01-22 23:10:37,955-06 INFO
[org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default
task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Lock freed to object
'EngineLock:{exclusiveLocks=3D'[dcabf886-22b2-4239-b57a-559d9b5b4c6d=3DDISK]',
sharedLocks=3D''}'

2018-01-22 23:10:37,955-06 ERROR
[org.ovirt.engine.api.restapi.resource.AbstractBackendResource] (default
task-58) [] Operation Failed: [Failed to hot-plug disk]
---

I see the "Failed to HotPlugDiskVDS, error =3D unsupported configuration:
native I/O needs either no disk cache or directsync cache mode, QEMU will
fallback to aio=3Dthreads, code=B2

But I have no clue how to fix that using oVirt 4.2 on CentOS 7. Fresh
install and all up to date.

Thanks for any help.

BTW, current script I am writing is here:
https://github.com/zipurman/oVIRT_Simple_Backup

Irc.oftc.net #ovirt
zipur

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<html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: s=
pace; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size:=
 14px; font-family: Calibri, sans-serif;"><div><div>Okay, when I do a snapsh=
ot, and then mount the snapshot to a Backup<span style=3D"font-style: italic;"=
pe USER,  ID: dcabf886-22b2-4239-b57a-559d9b5b4c6d Type: DiskAction gro=
up ATTACH_DISK with role type USER</div><div><br></div><div>2018-01-22 23:10=
:36,300-06 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDisk=
VDSCommand] (default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] START, =
HotPlugDiskVDSCommand(HostName =3D ovirtnodea.mydomain.com, HotPlugDiskVDSPara=
meters:{hostId=3D'34591e56-fd25-48dd-bf56-76b7b15e3721', vmId=3D'3c78dd5a-2982-4=
e35-ad9b-004394970dea', diskId=3D'dcabf886-22b2-4239-b57a-559d9b5b4c6d', addre=
ssMap=3D'null'}), log id: 1bb4b632</div><div><br></div><div>2018-01-22 23:10:3=
7,903-06 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.HotPlugDiskVDSComm=
and] (default task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Failed in 'Hot=
PlugDiskVDS' method</div><div><br></div><div>2018-01-22 23:10:37,907-06 ERRO=
R [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (de=
fault task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] EVENT_ID: VDS_BROKER_C=
OMMAND_FAILURE(10,802), VDSM ovirtnodea.mydomain.com command HotPl=
ugDiskVDS failed: unsupported configuration: native I/O needs either no disk=
 cache or directsync cache mode, QEMU will fallback to aio=3Dthreads</div><div=
ult task-58) [948cc433-45ed-46cc-b920-b4d9627bf99b] Lock freed to object 'En=
gineLock:{exclusiveLocks=3D'[dcabf886-22b2-4239-b57a-559d9b5b4c6d=3DDISK]', shar=
edLocks=3D''}'</div><div><br></div><div>2018-01-22 23:10:37,955-06 ERROR [org.=
ovirt.engine.api.restapi.resource.AbstractBackendResource] (default task-58)=
 [] Operation Failed: [Failed to hot-plug disk]</div></div><div>---</div><di=
v><br></div><div><br></div><div>I see the "Failed to HotPlugDiskVDS, error =3D=
 unsupported configuration: native I/O needs either no disk cache or directs=
ync cache mode, QEMU will fallback to aio=3Dthreads, code”</div><div><br=
style=3D"font-size: 12px; font-family: Verdana, Helvetica, Arial;"><font color=
=3D"#808080"><br></font></span></div></body></html>

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Snapshot Disk fails to connect to BackupApplianceVM - Failed to HotPlugDiskVDS

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