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

[Simon Capstick <simon@xxxxxxxxxxxxxxxx>]

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']
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.
Apart from authentication all the info needed for the logoff/logon is in 
the disk/by-path block device names.  I'm assuming that specifying the 
vbd as an iscsi:iqn is a SUSE thing rather than a more distro agnostic 
thing, since I've not seen it elsewhere?
Simon


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