Dejan Muhamedagic wrote:
> Hi,
>
> On Wed, Mar 18, 2009 at 11:37:27AM -0700, Neil Katin wrote:
>>
>> Dejan Muhamedagic wrote:
>>> Hi,
>>>
>>> On Tue, Mar 17, 2009 at 11:56:04AM +0530, Arun G wrote:
>>>> Hi,
>>>> I observed below error message when I upgraded drbd to drbd-8.3.0 in
>>>> heartbeat 2.1.4 cluster on 2.6.18-8.el5xen.
>> -- snip --
>>
>>> Thanks for the patch. But do all supported drbd versions have the
>>> role command?
>>>
>>> Thanks,
>>>
>>> Dejan
>> No, only 8.3 has the change. 8.2 supports the old "state" argument, but
>> prints a warning message out, and this warning message upsets the drbd OCF
>> scripts parting of drbdadm's output.
>
> Since versions before 8.3 don't have the role command, I suppose
> that 8.3 actually prints the warning.
>
>> drbdadm doesn't support a --version argument, but it does support a "status"
>> command, which has version info in it. However, I am not sure if "drbdadm
>> status"
>> is guaranteed to not block or not, so I didn't want to have the OCF script
>> depend
>> on it.
>
> drbdadm | grep Version
>
> works for 8.2.7 and 8.0.14, so I guess that it is available in
> other versions too.
>
>> So, I see three alternatives: add a new script "drbdadm8.3". Add an extra
>> parameter
>> saying "use role instead of status". Or call "drbdadm status" to
>> dynamically detect
>> our version.
>>
>> Do you see other choices? Do you have a preference for a particular
>> alternative?
>> I'm willing to code and test the patch if we can decide what we want.
>
> Let's see if we can figure out the version. Adding new RA would
> be a maintenance issue. Adding new parameter would make
> configuration depend on particular release.
>
> We could do something like this:
>
> drbdadm | grep Version | awk '{print $2}' |
> awk -F. '
> $1 != 8 { exit 2; }
This should also allow version 7. People may still use v7. The drbdadm |
grep thing also works. Tested with latest v7 in a vm.
It prints
# drbdadm | grep Version | awk '{print $2}'
0.7.25
though.
Regards
Dominik
> $2 < 3 { exit 1; } # use status
> # otherwise use role
> '
> rc=$?
> if [ $rc -eq 2 ]; then
> error installed (unsupported version)
> elif [ $rc -eq 1 ]; then
> cmd=status
> else
> cmd=role
> fi
>
> Could you please try this out. I can't test this right now.
>
> Thanks,
>
> Dejan
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