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

Also noticed that /dev/disk/by-scsibus/* path does not exist as supposed in cacheSCSIidentifiers() in the scsiutil.py so devs property is empty while sr-probe and only general information returns. Does any patch exist too?

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__
    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
    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
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,


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