Re: [Xen-users] Safe iSCSI & Live Migrations

[Matthew Wild <M.Wild@xxxxxxxx>]

Simon Capstick wrote:
> Matthew Wild wrote:
> ...
>>>
>> In the most recent SuSE xen implementations, there are some scripts for
>> block devices that will connect to an iSCSI target as it's needed by the
>>  domU and allows you to specify the vbd as iscsi:iqn...
>>
>> After some hacking to make them work with the latest open-iscsi, they
>> seem to do OK. I haven't tried them with migration yet as I need to set
>> up the 2nd 16cpu box.
>>
>> Matthew
> 
> Interesting, I didn't realise Novell/SUSE had done this.  In my Xen DomU
> configs I use disk stanzas like this:
> 
> disk =
> ['phy:disk/by-path/ip-192.168.0.2:3260-iscsi-iqn.2007-08.com.example:storage.xen.domUname.root-lun-0,sda1,w']
> 
That's similar to how mine are on some older xen boxes. I had to modify
a udev rule to properly manage luns and partitions from the iscsi targets.
> 
> It would be nice if there were some scripts that would recognise the
> block device as being iscsi (seems straightforward).  Then the scripts
> could do any appropriate iSCSI logoffs/logons on the Dom0s during DomU
> migrations and DomU start-ups.
> 
That's certainly what these scripts are like, for creation at least.
They're just fairly simple bash scripts.

Matthew
-- 
Matthew Wild                       Tel.: +44 (0)1235 445173
M.Wild@xxxxxxxx                    URL http://www.ukssdc.ac.uk/
UK Solar System Data Centre and
World Data Centre - Solar-Terrestrial Physics, Chilton
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX

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