Re: [ovirt-users] Sharing iSCSI data stroage domain across multiple clusters in the same datacenter

santosh Tue, 05 Aug 2014 08:38:27 -0700


On 08/04/2014 04:42 PM, Itamar Heim wrote:

On 08/04/2014 05:46 PM, santosh wrote:

On 08/03/2014 03:01 PM, Itamar Heim wrote:

On 07/30/2014 10:35 PM, santosh wrote:

Hi,
*
**Can we share the iSCSI data storage domain across multiple clusters in
the same datacenter?*


Following are the setup details which I tried.

      -    One datacenter, Say DC1
      -    in DC1, two clusters, say CL1 and CL2
      -    In CL1, one host, say H1. And in CL2 one host, say H2
      -    iSCSI Data Storage domain is configured where external storage
      LUNs are exported to host H1(A host in CL1 of Datacenter).


While adding H1 to CL1 is succeeded; addition of H2 in CL2 is failing
with following error in vdsm.log.

      Traceback (most recent call last):
         File "/usr/share/vdsm/storage/task.py", line 873, in _run
           return fn(*args, **kargs)
         File "/usr/share/vdsm/logUtils.py", line 45, in wrapper
           res = f(*args, **kwargs)
         File "/usr/share/vdsm/storage/hsm.py", line 1020, in
      connectStoragePool
           spUUID, hostID, msdUUID, masterVersion, domainsMap)
         File "/usr/share/vdsm/storage/hsm.py", line 1091, in
      _connectStoragePool
           res = pool.connect(hostID, msdUUID, masterVersion)
         File "/usr/share/vdsm/storage/sp.py", line 630, in connect
           self.__rebuild(msdUUID=msdUUID, masterVersion=masterVersion)
         File "/usr/share/vdsm/storage/sp.py", line 1153, in __rebuild
           self.setMasterDomain(msdUUID, masterVersion)
         File "/usr/share/vdsm/storage/sp.py", line 1360, in setMasterDomain
           raise se.StoragePoolMasterNotFound(self.spUUID, msdUUID)
      StoragePoolMasterNotFound: Cannot find master domain:
      'spUUID=a4dfaf64-adfa-4cfa-88d5-986fbdb2b2b2,
      msdUUID=741f7913-09ad-4d96-a225-3bda6d06e042'
      Thread-13::DEBUG::2014-07-30
      15:24:49,780::task::885::TaskManager.Task::(_run)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::Task._run:
      07997682-8d6b-42fd-acb3-1360f14860d6
      ('a4dfaf64-adfa-4cfa-88d5-986fbdb2b2b2', 2,
      '741f7913-09ad-4d96-a225-3bda6d06e042', 1, None) {} failed -
      stopping task
      Thread-13::DEBUG::2014-07-30
      15:24:49,780::task::1211::TaskManager.Task::(stop)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::stopping in state
      preparing (force False)
      Thread-13::DEBUG::2014-07-30
      15:24:49,780::task::990::TaskManager.Task::(_decref)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::ref 1 aborting True
      *Thread-13::INFO::2014-07-30
      15:24:49,780::task::1168::TaskManager.Task::(prepare)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::aborting: Task is
      aborted: 'Cannot find master domain' - code 304*
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::task::1173::TaskManager.Task::(prepare)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::Prepare: aborted:
      Cannot find master domain
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::task::990::TaskManager.Task::(_decref)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::ref 0 aborting True
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::task::925::TaskManager.Task::(_doAbort)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::Task._doAbort: force False
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::resourceManager::977::ResourceManager.Owner::(cancelAll)
      Owner.cancelAll requests {}
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::task::595::TaskManager.Task::(_updateState)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::moving from state
      preparing -> state aborting
      Thread-13::DEBUG::2014-07-30
      15:24:49,781::task::550::TaskManager.Task::(__state_aborting)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::_aborting: recover
      policy none
      Thread-13::DEBUG::2014-07-30
      15:24:49,782::task::595::TaskManager.Task::(_updateState)
      Task=`07997682-8d6b-42fd-acb3-1360f14860d6`::moving from state
      aborting -> state failed
      Thread-13::DEBUG::2014-07-30
      15:24:49,782::resourceManager::940::ResourceManager.Owner::(releaseAll)
      Owner.releaseAll requests {} resources {}
      Thread-13::DEBUG::2014-07-30
      15:24:49,782::resourceManager::977::ResourceManager.Owner::(cancelAll)
      Owner.cancelAll requests {}
      Thread-13::ERROR::2014-07-30
      15:24:49,782::dispatcher::65::Storage.Dispatcher.Protect::(run)
      {'status': {'message': "Cannot find master domain:
      'spUUID=a4dfaf64-adfa-4cfa-88d5-986fbdb2b2b2,
      msdUUID=741f7913-09ad-4d96-a225-3bda6d06e042'", 'code': 304}}

_*Please advise if I need to have one Storage Domain per cluster in
given datacenter.*_

Thanks, Santosh.


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no. you can access a storage domain from multiple clusters in same DC.

[Santosh] That is my understanding also.

which type of storage?

[Santosh] 'Storage' is of 'iSCSI' type. Domain type is 'Data (Master)'

could it be its "protecting" shared access to the DC?

[Santosh] How should I find it out?

which type of storage array?

[Santosh:1] NetApp 8.1.3 7-Mode

is moving the host to same cluster as the SPM resolving the issue for
you (it shouldn't)

[Santosh] Moving the host to the same cluster as that of SPM did not
resolve the issue.

and if you move the SPM host to maint, does the 2nd host able to become
an SPM/access the storage (which would indicate an issue with storage
side 'protection'.

[Santosh:1] After moving SPM host to maint, 2nd host is able to becomeSPM an access the storage.


[Santosh:1] I will check the storage side protection.

else, are you sure all hosts can access the storage?


Thanks for the reply.
Regards, Santosh.


***************************Legal Disclaimer***************************
"This communication may contain confidential and privileged material for the
sole use of the intended recipient. Any unauthorized review, use or distribution
by others is strictly prohibited. If you have received the message by mistake,
please advise the sender by reply email and delete the message. Thank you."
**********************************************************************





***************************Legal Disclaimer***************************
"This communication may contain confidential and privileged material for the
sole use of the intended recipient. Any unauthorized review, use or distribution
by others is strictly prohibited. If you have received the message by mistake,
please advise the sender by reply email and delete the message. Thank you."
**********************************************************************
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Re: [ovirt-users] Sharing iSCSI data stroage domain across multiple clusters in the same datacenter

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