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

[Andrey <basketboy@xxxxx>]

Thank you for the patch, will try to apply it.

In our configuration we don't need shared lvm SR because we have one 
server with dual-path directly attached  P2000 SAN. I also have 
configured multipath for the LUNs. So may be we can create local LVM SR 
then for the multipath devices?
17.01.2013 18:19, Simon Beaumont ÐÐÑÐÑ:
> > -----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
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