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To: Olivier Smedts <olivier@gid0.org>
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Subject: Re: how to access ZFS snapshot via iSCSI
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On Thu, Sep 27, 2012 at 6:57 AM, Olivier Smedts <olivier@gid0.org> wrote:
> 2012/9/26 Zeus Panchenko <zeus@ibs.dn.ua>:
>> hi all,
>>
>> please, may somebody advice, can I access ZFS snapshot via iSCSI?
>>
>> I do can get access to ZFS filesystem and zvol, but how to access ZFS snapshot?
>>
>> I am trying that via istgt, in istgt.conf I put:
>>
>> [LogicalUnit4]
>>   Comment "ZVOL 500Gb to test"
>>   TargetName zvol-totest
>>   Mapping PortalGroup1 InitiatorGroup1
>>   AuthMethod Auto
>>   AuthGroup AuthGroup1
>>   UseDigest Auto
>>   UnitType Disk
>>   QueueDepth 64
>>   LUN0 Storage /dev/zvol/storage/win/zvol-totest Auto
>>
>> and I can mount it and use
>>
>> when I put
>>
>> [LogicalUnit5]
>>   Comment "snapshot of ZVOL 500Gb totest"
>>   TargetName zvol-totest-snapshot
>>   Mapping PortalGroup1 InitiatorGroup1
>>   AuthMethod Auto
>>   AuthGroup AuthGroup1
>>   UseDigest Auto
>>   UnitType Disk
>>   QueueDepth 64
>>   LUN0 Storage /dev/zvol/storage/win/zvol-totest@hourly-2012-09-26-11 Auto
>
> Can you set a read-only access in this config file ? Maybe istgt tries
> to open the volume read-write but it can't because it's a snapshot.
>
> --
> Olivier Smedts                                                 _
>                                         ASCII ribbon campaign ( )
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Try adding "ReadOnly Yes" option on LogicalUnit.

[LogicalUnit5]
...
ReadOnly Yes
...