rsyslog script

[James Hunt]

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On 23/03/11 01:20, Grail Dane wrote:
> In case anyone can see room to point me in the right direction here, I
> have recorded my latest bootup
> messages and the one for my rsyslog looks like:
> 
> init: rsyslog main process (860) terminated with status 1
> init: rsyslog main process ended, respawning
> 
> As you can see it seems to respawn but without an associated PID yet
> running initctl list the corresponding entry is:
> 
> rsyslog start/running
> 
> Whereas all others with a PID also have - , process PID
> And even though it says running, a ps yields nothing and no logs are
> getting updated.
> 
> Any thoughts or help would be appreciated :)
> grail
> 
> ------------------------------------------------------------------------
> From: grail69 at hotmail.com
> To: upstart-devel at lists.ubuntu.com
> Subject: rsyslog script
> Date: Tue, 1 Mar 2011 03:23:15 +0000
> 
> I seem to be stuck with this one and not sure if possible to do what I
> am trying?
> 
> I copied the rsyslog.conf from my Ubuntu machine and changed it to the
> below:
> 
> < ---------- start ----------------->
> # rsyslog - system logging daemon
> #
> # rsyslog is an enhanced multi-threaded replacement for the traditional
> # syslog daemon, logging messages from applications
> 
> description"system logging daemon"
> 
> start on filesystem
> stop on runlevel [06]
> 
> expect fork
> respawn
> 
> pre-start script
>     COMPAT=$(/sbin/rsyslogd -v | awk 'NR == 1{print substr($2, 1, 1)}')
> end script
> 
> exec rsyslogd -c$COMPAT
> < ---------- end ----------------->
> 
> This seems to start and assign a PID, it then terminates and respawns
> but without a PID and consequently is not really running.
> 
> So i guess my question is: Am I not able to use variables in this way or
> have I done it the wrong way?
> If yes to the wrong way, would someone please educate me?
> 
> Also I am guessing this is not really a devel question ... is there a
> support list?
> 
> Cheers
> grail
> 
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> 
Hi Grail,

The problem with your script is that the "COMPAT" variable is not
"visible" to the exec stanza: Upstart runs each script section in a
separate process. Therefore I think that your exec is actually running
"rsyslogd -c" (which is invalid).

As to a solution: you don't actually need that pre-start. You could just
do this:

exec rsyslogd -c$(/sbin/rsyslogd -v | awk 'NR == 1{print substr($2, 1, 1)}')

One other comment: you have specified the path to rsyslogd in your
pre-start, but not in your exec stanza. I appreciate that the original
.conf file has the same problem, but it is always best to specify the
path to avoid surprises :)

Finally, be careful with respawn and script sections (see
https://bugs.launchpad.net/upstart/+bug/406397).

Regards,

James.
- --
James Hunt
____________________________________
Ubuntu Foundations Team, Canonical.
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