Re: [Xen-API] xcp-xapi devscan.py kernel support

[Simon Beaumont <simon.beaumont@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-api-bounces@xxxxxxxxxxxxx [mailto:xen-api-bounces@xxxxxxxxxxxxx] On
> Behalf Of Andrey
> Sent: 17 January 2013 12:56 PM
> To: xen-api@xxxxxxxxxxxxx
> Subject: [Xen-API] xcp-xapi devscan.py kernel support
>
> I installed xcp-xapi on the Debian Wheezy and can't get LVMoHBA to work:
> 
> stderr: Traceback (most recent call last):
>    File "/usr/lib/xcp/sm/LVMoHBASR", line 220, in <module>
>      SRCommand.run(LVHDoHBASR, DRIVER_INFO)
>    File "/usr/lib/xcp/sm/SRCommand.py", line 261, in run
>      sr = driver(cmd, cmd.sr_uuid)
>    File "/usr/lib/xcp/sm/SR.py", line 136, in __init__
>      self.load(sr_uuid)
>    File "/usr/lib/xcp/sm/LVMoHBASR", line 94, in load
>      print >>sys.stderr,self.hbasr.print_devs()
>    File "/usr/lib/xcp/sm/HBASR.py", line 224, in print_devs
>      self._init_hbadict()
>    File "/usr/lib/xcp/sm/HBASR.py", line 61, in _init_hbadict
>      dict = devscan.adapters(filterstr=self.type)
>    File "/usr/lib/xcp/sm/devscan.py", line 168, in adapters
>      glob.glob(os.path.join(path,"device","block:*"))[0]).split(':')[1]
> IndexError: list index out of range
> 
> 
> Can you please send devscan.py patch to support lvmohba in kernel 3.X.

I have attached the patch in question. It uses the right sysfs paths after 
detecting the kernel version. It might not apply to your version but it may 
help you make the change you require.

> Also will in this case other lvmohba features will work smoothly in that case
> on Debian, especially multipath?

It's unlikely you'll get LVM to work with your setup since we use a patched 
version that accepts another option (--master) which affords us a different 
locking mechanism to allow shared SRs. This option doesn't exist in the 
upstream Debian LVM.

It may(!) be possible to get it to work if you remove the --master option from 
the calls to lvm in the source and ensure that you are only using these SRs in 
single-host pools. Again, your mileage may vary.

Hope this helps,

-Si

Attachment: HBA-sysfs-paths-3.x-fix.patch
Description: HBA-sysfs-paths-3.x-fix.patch

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