Re: [Xen-users] multipathing XCP 1.6

[Errol Neal <eneal@xxxxxxxxxxxxxxxxx>]

On Wed, 09/18/2013 01:19 PM, motty cruz <motty.cruz@xxxxxxxxx> wrote:
> First Thank you for your reply, I will take note of xenserver mailling
> list.
> 
> SR is lvmoiscsi,
> 
> # cat /sys/block/sda/device/vendor
> ServeRA
> # cat /sys/block/sda/device/model
> hanet
> 
> The device is Hitachi
> 
> I am running XCP 1.6
> 
> Thanks again!
> -Motty
> 
You should add an entry in multipath.conf for your device. Here is an example 
of what I use for my SCST HA configuration

         device {
                vendor                  "SCST_[FB]IO"
                product                 ".*"
                #prio_callout            "/sbin/mpath_prio_alua /dev/%n"
                #path_grouping_policy    group_by_prio
                path_grouping_policy    multibus
                failback                immediate
                getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
                rr_min_io               100
                no_path_retry           queue
                #path_checker            scsi_dh_alua
                path_checker            tur
                #features                "0"
                features                "1 queue_if_no_path"
                #hardware_handler       "1 alua"
                hardware_handler        "0"
        }


Once that's done, reboot or force dm_mulitpath and multipathd to reload. 

After that, I add the SR in XenCenter using a single path, then in the CLI, I 
unplug the pbd and recreate it using both iSCSI portals. 

Here is the command I use:

xe pbd-create sr-uuid=2eb2b66b-9353-00e4-1504-dbf4d7e1fb22 
device-config:SCSIid=25a526a5255693468 device-config:port=3260 
device-config:multihomelist=10.3.147.194:3260,10.3.147.130:3260 
device-config:targetIQN=iqn.2010-03:dcsciscsi-ha.datavol01.zrjrui4h09jekauz 
device-config:target=10.3.147.130,10.3.147.194 
host-uuid=1251fd73-7ae6-429e-bf73-61f05ac58cea

I think you can add both portal IPs in XenCenter, but you'll have to try. 

Hope that helps.. 

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