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Re: [pcp] Prepare to be assimilated^Wanalysed; resistance is futile

To: Nathan Scott <nathans@xxxxxxxxxx>
Subject: Re: [pcp] Prepare to be assimilated^Wanalysed; resistance is futile
From: Ryan Doyle <ryan@xxxxxxxxxxxx>
Date: Tue, 02 Jul 2013 19:48:26 +1000
Cc: Ken McDonell <kenj@xxxxxxxxxxxxxxxx>, "Frank Ch. Eigler" <fche@xxxxxxxxxx>, Stan Cox <scox@xxxxxxxxxx>, <pcp@xxxxxxxxxxx>
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Hi Nathan et al.

Thought I'd add my 2 cents as someone on the receiving end of configuring pmlogger.

Auto-discovery via Avahi is good idea but does assume a certain network configuration. Multicast must be allowed in the network and for inter-vlan discovery, multicast routing is also required (something seldom configured in the enterprise).

Also, most cloud provides (including AWS/EC2) do not permit multicast in it's entirety.

I (personally) like the idea that clients can inform a pmlogger that they want to be logged via a well known hostname or IP address that the administrator knows. DNS (and the search path) could do the heavy-lifting to find the right pmlogger host to talk to.

Anyway, some food for thought. Cheers!

Ryan

On Mon, 1 Jul 2013 06:16:02 -0400 (EDT), Nathan Scott <nathans@xxxxxxxxxx> wrote:
----- Original Message -----
AIUI, we need something running all the time (daemon) that is able to catch these Avahi events as they happen, indicating a pmcd has been detected on
the network that is available for logging (or inference).

Above we have "pmlogger or pmlogconf or whatnot" suggested - I think it has to be the latter (whatnot). With the current model, pmlogger is designed to record an archive for one host only - this requires something to start/stop

Hmm, "this" is ambiguous here => I meant "this funky Avahi
auto-logging stuff"
and not "this current pmlogger model".

logging arbitrary hosts as they come/go on the network. pmlogconf today is

cheers.

--
Nathan

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