[Commotion-dev] collectd number of users

[Seamus Tuohy]

Hey Sean,

Make sure you loaded the rrdtool plugin. It can't collect data if it
does not have a data collection plugin. You can check out the original
configuration I used when I set it up on a node here.
https://code.commotionwireless.net/projects/commotion/wiki/Hackday-5412

That worked enough to gather data, but it did not use the iptables
plugin. It also does not have the output set to send to an centralized
server, etc. It should give you a foil to check against though.

s2e

On 11/21/2012 11:03 PM, Sean McIntyre wrote:
> My understanding is that the following lines in /etc/collectd.conf
> should be enough. It will keep track of data going through the output
> chain and forward chain.
> 
> LoadPlugin iptables
> <Plugin "iptables">
>   Chain "filter" "FORWARD"
>   Chain6 "filter" "OUTPUT"
> </Plugin>
> 
> The symptom is I'm not getting any iptables RRD data / folder in the
> server's /var/lib/collectd/rrd/commotion-230179203 folder.
> 
> Sean
> 
> On Wed, Nov 21, 2012 at 10:49 PM, Sean McIntyre <boxysean at gmail.com> wrote:
>> Cool, ty Ben and Seamus. Do you guys have working /etc/collectd.conf
>> with collectd-mod-iptables? I'm researching it, but seems like I'm
>> going to have to get a bit more up-to-speed with iptables and the mod
>> to get something working.
>>
>> Sean
>>
>> On Wed, Nov 21, 2012 at 9:45 AM, Seamus Tuohy <s2e at opentechinstitute.org> wrote:
>>> Yea, from my search Ben is right on track. No better way with CollectD.
>>>
>>> s2e
>>>
>>>
>>> On 11/21/2012 09:25 AM, Benjamin Chodoroff wrote:
>>>> On Tue 20 Nov 2012 10:00:30 PM EST, Sean McIntyre wrote:
>>>>> Hey list,
>>>>>
>>>>> I'm trying to figure out what collectd mod to use to keep track of the
>>>>> number of users on a node. I think some of you have talked in other
>>>>> channels saying that keeping track of DHCP leases is the way to go. It
>>>>> also sounds like one of you (Seamus?) has done this before.
>>>>>
>>>>> I installed the iptables mod from pre-built packages here
>>>>> <http://downloads.openwrt.org/snapshots/trunk/ar71xx/packages/> but
>>>>> for some reason am not getting any data out of it. Here's the relevant
>>>>> config lines in /etc/collectd.conf.
>>>>>
>>>>> LoadPlugin iptables
>>>>> <Plugin "iptables">
>>>>>   Chain "filter" "FORWARD"
>>>>>   Chain6 "filter" "OUTPUT"
>>>>> </Plugin>
>>>>>
>>>>> Let me know if you see anything / if you've made this work before. I'm
>>>>> kinda wondering if a special collectd mod needs to be made for this
>>>>> purpose...? (hope not!)
>>>>>
>>>>> Sean
>>>>
>>>> Just spent a minute looking around for a dhcp lease count collectd
>>>> plugin, but didn't find one. Iptables is one way of doing it, or
>>>> another option is to write a shell script collectd plugin using
>>>> https://collectd.org/wiki/index.php/Plugin:Exec that runs "cat
>>>> /var/dhcpd.leases | wc -l"
>>>>
>>>> iptables will give a more accurate picture of instantaneous # of users,
>>>> i think.
>>>>
>>>> -b
>>>>
>>>>
>>>>
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>>>
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