Monit configuration

Monit configuration

[Florian Munz]

Hi,

is anyone using monit together with Unicorn?

I'd like to monitor the Unicorn child processes for memory growth. But
monit needs a pid file for each process and since Unicorn only writes a
pid file for the master this becomes a bit complicated.

I know bluepill and god can handle this but I was wondering if anyone
has got this working somehow before I start looking into these.


thanks,
Florian

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Re: Monit configuration

[Iñaki Baz Castillo]

El Lunes 08 Marzo 2010, Florian Munz escribió:
> Hi,
> 
> is anyone using monit together with Unicorn?
> 
> I'd like to monitor the Unicorn child processes for memory growth. 

> But monit needs a pid file for each process

Why do you say that? I use monit to monitorize some forking servers and it 
takes into accoutn of the child processes. The "trick" is telling monit to 
inspect the master process pid (that present unde /var/lib/SERVER.pid).




-- 
Iñaki Baz Castillo <ibc@aliax.net>
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Re: Monit configuration

[Wincent Colaiuta]

El 08/03/2010, a las 21:31, Florian Munz escribió:

> Hi,
> 
> is anyone using monit together with Unicorn?
> 
> I'd like to monitor the Unicorn child processes for memory growth. But
> monit needs a pid file for each process and since Unicorn only writes a
> pid file for the master this becomes a bit complicated.

I'm using Monit to monitor Unicorn.

I use the "totalmem" and "totalcpu" keywords to watch the usage of the master process and all child processes.

Previously I used Monit to monitor a bunch of Mongrel servers instead. Those used to stop responding every few days, but I've had no failures nor memory problems since switching to Unicorn.

Wincent



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Re: Monit configuration

[Florian Munz]

Iñaki Baz Castillo <ibc@aliax.net> wrote:
> Why do you say that? I use monit to monitorize some forking servers and it
> takes into accoutn of the child processes. The "trick" is telling monit to
> inspect the master process pid (that present unde /var/lib/SERVER.pid).

Interesting. From the documentation I can't figure out how you can
monitor the children individually though.

I can test for the memory of the master process and I can test the
memory size of master plus all children. But want I want to do is
basically: Sent a QUIT to the child process if its memory size is
greater than 300MB.


- Florian

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Re: Monit configuration

[Iñaki Baz Castillo]

El Lunes 08 Marzo 2010, Florian Munz escribió:
> I can test for the memory of the master process and I can test the
> memory size of master plus all children. But want I want to do is
> basically: Sent a QUIT to the child process if its memory size is
> greater than 300MB.

Ok, that's not possible with Monit (AFAIK).

Well, you could create a script that stores in some file the Unicorn's child 
processes pids, so Monit could inspect them.


-- 
Iñaki Baz Castillo <ibc@aliax.net>
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