Re: [Ganglia-developers] [Ganglia-general] Another interface for Ganglia stats

[Bernard Li <be...@va...>]

P.S. Spike replied to your original email, in case you missed it:

http://www.mail-archive.com/gan...@li.../msg05178.html

Thanks,

Bernard

On Mon, Sep 21, 2009 at 10:26 PM, Bernard Li <be...@va...> wrote:
> Hi Vladimir:
>
> Since this is more of a development discussion, I suggest we move this
> thread to ganglia-developers.  If you haven't subscribed yet, I
> strongly encourage you to.
>
> Thanks for your contributions.
>
> Cheers,
>
> Bernard
>
> On Mon, Sep 21, 2009 at 12:57 PM, Vladimir Vuksan <vl...@ve...> wrote:
>> While waiting for a never ending compile to end I decided to hack Ganglia
>> myself :-) to do what I proposed. I changed the process_tcp_accept_channel
>> to listen for "commands" in the format of
>>
>> HOSTNAME METRIC
>>
>> As a result you get something like this
>>
>> $ echo "localhost.localdomain cpu_nice" | nc localhost 8700
>> <HOST NAME="localhost.localdomain">
>> <METRIC NAME="cpu_nice" VAL="0.0" TYPE="float" UNITS="%" TN="0" TMAX="90"
>> DMAX="0" SLOPE="both">
>> <EXTRA_DATA>
>> <EXTRA_ELEMENT NAME="GROUP" VAL="cpu"/>
>> <EXTRA_ELEMENT NAME="DESC" VAL="Percentage of CPU utilization that occurred
>> while executing at the user level with nice priority"/>
>> <EXTRA_ELEMENT NAME="TITLE" VAL="cpu_nice"/>
>> </EXTRA_DATA>
>> </METRIC>
>> </HOST>
>> $
>>
>> Code is not particularly beautiful and likely needs security checks etc. but
>> does the job. Obviously this breaks tcp_accept_channel behaviour. Possibly
>> it should be run on a separate port or if you don't care about breaking
>> legacy behavior it could be run on the same port ie. by having gmetad send
>> SEND_ALL command.
>>
>> Patch is attached.
>>
>> Vladimir
>>
>>
>>
>> On Wed, 16 Sep 2009, Bernard Li wrote:
>>
>>> +1 on the general idea, not sure about the implementation though.
>>>
>>> Let's get Spike into this discussion -- yes Spike, I'm calling you out!
>>> ;-)
>>>
>>> Cheers,
>>>
>>> Bernard
>>>
>>> On Wed, Sep 16, 2009 at 11:49 AM, Vladimir Vuksan <vl...@ve...> wrote:
>>>>
>>>> There have been some tweets that someone was working on a REST interface
>>>> for Ganglia. At first I thought it wasn't such a big deal but I think
>>>> that
>>>> adding a simplistic interface to Ganglia would be a nice addition ie.
>>>> something like
>>>>
>>>>> telnet ganglia 8653
>>>>
>>>> METRIC web1 load_one
>>>>
>>>> Which would echo out the current value for load_one. That way you can
>>>> avoid parsing out the XML to get those values. I think for large sites it
>>>> makes a lot of sense. Granted there are "workarounds" that could be
>>>> implemented and people have.
>>>>
>>>>
>>>> I believe all that needs to be done is add a function similar to
>>>>
>>>> process_tcp_accept_channel
>>>>
>>>> which doesn't dump out the whole XML but selective value. I would put it
>>>> on a separate port call it tcp_get_metric. If you were so inclined you
>>>> could even make it a HTTP interface.
>>>>
>>>> Thoughts ?
>>>>
>>>> Vladimir
>>>>
>>>>
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>>
>