zfs discuss - Feb 2008 - Computer usable output for zpool commands

Hi,

I wrote an hobbit script around lunmap/hbamap commands to monitor SAN health.
I''d like to add detail on what is being hosted by those luns.

With svm metastat -p is helpful.

With zfs, zpool status output is awful for script.

Is there somewhere an utility to show zpool informations in a scriptable format
?

Nico
 
 
This message posted from opensolaris.org

On Feb 1, 2008, at 7:17 AM, Nicolas Dorfsman wrote:
> Hi,
>
> I wrote an hobbit script around lunmap/hbamap commands to monitor  
> SAN health.
> I''d like to add detail on what is being hosted by those luns.
>
> With svm metastat -p is helpful.
>
> With zfs, zpool status output is awful for script.
>
> Is there somewhere an utility to show zpool informations in a  
> scriptable format ?
What exactly do you want to display?

We have the ''-H'' option to ''zfs list'' and
''zfs get'' for parsing.
Feel free to experiment with the code to make zpool otuput more  
scriptable:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/ 
zpool/zpool_main.c

eric

Hello eric,

Tuesday, February 12, 2008, 7:33:14 PM, you wrote:

ek> On Feb 1, 2008, at 7:17 AM, Nicolas Dorfsman wrote:
>> Hi,
>>
>> I wrote an hobbit script around lunmap/hbamap commands to monitor  
>> SAN health.
>> I''d like to add detail on what is being hosted by those luns.
>>
>> With svm metastat -p is helpful.
>>
>> With zfs, zpool status output is awful for script.
>>
>> Is there somewhere an utility to show zpool informations in a  
>> scriptable format ?
ek> What exactly do you want to display?

ek> We have the ''-H'' option to ''zfs list''
and ''zfs get'' for parsing.
ek> Feel free to experiment with the code to make zpool otuput more  
ek> scriptable:
ek> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/ 
ek> zpool/zpool_main.c


Eric - IIRC in early zfs days you could actually get zpool output
describing your pool (not zfs datasets but pool itself) in a way which
is easy to re-create it.

If you have couple of dozen disks with some N-raidz2 config and you
just happen to buy another unit and lost your zpool create command but
still want to create it exactly the same as on previous one, zpool
output doesn''t help you in current bits with it.

Getting output where you just can do something like

        zpool create test `zpool status -S current`

could bu useful (of course above command doesn''t make sens but you get
the idea).



-- 
Best regards,
 Robert Milkowski                            mailto:milek at task.gda.pl
                                       http://milek.blogspot.com

On Feb 20, 2008, at 2:16 PM, Robert Milkowski wrote:
> Hello eric,
>
> Tuesday, February 12, 2008, 7:33:14 PM, you wrote:
>
> ek> On Feb 1, 2008, at 7:17 AM, Nicolas Dorfsman wrote:
>
>>> Hi,
>>>
>>> I wrote an hobbit script around lunmap/hbamap commands to monitor
>>> SAN health.
>>> I''d like to add detail on what is being hosted by those
luns.
>>>
>>> With svm metastat -p is helpful.
>>>
>>> With zfs, zpool status output is awful for script.
>>>
>>> Is there somewhere an utility to show zpool informations in a
>>> scriptable format ?
>
> ek> What exactly do you want to display?
>
> ek> We have the ''-H'' option to ''zfs
list'' and ''zfs get'' for parsing.
> ek> Feel free to experiment with the code to make zpool otuput more
> ek> scriptable:
> ek> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/
> ek> zpool/zpool_main.c
>
>
> Eric - IIRC in early zfs days you could actually get zpool output
> describing your pool (not zfs datasets but pool itself) in a way which
> is easy to re-create it.
>
> If you have couple of dozen disks with some N-raidz2 config and you
> just happen to buy another unit and lost your zpool create command but
> still want to create it exactly the same as on previous one, zpool
> output doesn''t help you in current bits with it.
>
> Getting output where you just can do something like
>
>         zpool create test `zpool status -S current`
>
> could bu useful (of course above command doesn''t make sens but you
get
> the idea).
You can always retrieve the original ''zpool create'' command
via
''zpool history'' as it is never overwritten.  However, if you
later on
do a ''zpool add'' that can potentially be overwritten (as the
history
is implemented as a ring buffer).

eric