Re: [linux-lvm] Listing physical volumes in a volume group

[Steeve McCauley <steeve@terrascale.net>]

Milan,

Ah, I didn't realise one could use the pv_ column names
with the vgs utility.

That's much better.

Thanks,

steeve

Milan Broz wrote:
> Hi,
> 
> this will not help for using in script ?
> (comma separated list of PVS & PV UUID  in VG)
> 
> vgs --separator , --noheadings -o pv_name,pv_uuid <vgname>
> 
> Milan
> --
> mbroz@redhat.com
> 
> Steeve McCauley wrote:
>> I would like to know if there is a canonical way to list the
>> physical volumes in a volume group, specifically to extract
>> the uuid for those PVs in a bash script.  I am able to do
>> something along the lines of,
>>
>> PVS=$(vgdisplay -vv 2>&1 | grep "PV UUID" | awk '{print $3}')
>> PVUUID=$(pvs -o pv_uuid --noheadings /dev/sdx | awk '{print $1}')
>>
>> and then look for PVUUID in the list of PVS.
>>
>> for uuid in $PVS; do
>>    [ "$uuid" != "$PVUUID" ] && continue
>>    ...
>> done
>>
>> but this relies on the output format of 'vgdisplay -vv' and
>> I want to be sure that I will always get the expected result.
>>
>> Thanks,
>>
>> steeve
>>
> 
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> 

-- 
Steeve McCauley
Director of Research and Development
Rackable Systems
407 McGill Street, Suite 1002
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:wq