svlogd choaking on lock

svlogd choaking on lock

[Joshua N Pritikin]

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Hi!

I'm using svlogd for apache2 access logs.  However, this is not working
too well.  The problem is that when apache restarts, say a graceful USR1
restart, then it kills the old svlogd and starts a new one fast enough
that I almost always get:

svlogd: warning: unable to lock directory: /var/log/apache2/access:
temporary failure
svlogd: fatal: no functional log directories.

The error log was exhibiting the same problem but then I figured out how
to route the ErrorLog through /dev/fd/3 and then runsv took care of not
restarting svlogd.  So only the access log problem remains.

Suggestions?

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Re: svlogd choaking on lock

[Paul Jarc]

Joshua N Pritikin <jpritikin@pobox.com> wrote:
> The problem is that when apache restarts, say a graceful USR1
> restart, then it kills the old svlogd and starts a new one fast enough
> that I almost always get:
>
> svlogd: warning: unable to lock directory: /var/log/apache2/access: temporary failure
> svlogd: fatal: no functional log directories.

You could change your svlogd invocation to "sleep 1 && svlogd ...".


paul

Re: svlogd choaking on lock

[Joshua N Pritikin]

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On Wed, Dec 07, 2005 at 11:04:02AM -0500, Paul Jarc wrote:
> Joshua N Pritikin <jpritikin@pobox.com> wrote:
> > svlogd: warning: unable to lock directory: /var/log/apache2/access: temporary failure
> > svlogd: fatal: no functional log directories.
> 
> You could change your svlogd invocation to "sleep 1 && svlogd ...".

Gosh, that was easy!

Thanks.

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Make April 15 just another day, visit http://fairtax.org

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Re: svlogd choaking on lock

[Bernhard Graf]

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On Wednesday 07 December 2005 13:05, Joshua N Pritikin wrote:

> [...] I figured out
> how to route the ErrorLog through /dev/fd/3 [...]

namely?
-- 
Bernhard Graf

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Re: svlogd choaking on lock

[Joshua N Pritikin]

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On Wed, Dec 07, 2005 at 06:24:46PM +0100, Bernhard Graf wrote:
> On Wednesday 07 December 2005 13:05, Joshua N Pritikin wrote:
> > [...] I figured out
> > how to route the ErrorLog through /dev/fd/3 [...]
> 
> namely?

Well, the obvious part is the apache2 conf:

  ErrorLog /dev/fd/3

And run script is:

  exec /usr/sbin/apache2 -DNO_DETACH -E /dev/fd/1 3>&1

This has the nice property that the -E output goes through the same
pipe as the error log.  Sometimes I don't get a clean restart for
whatever reason, so I added a finish script:

  sleep 5
  rm -f /var/log/apache2/error/lock  # maybe not needed
  pkill -9 apache2

And the log script is as usual:

  exec svlogd -tt /var/log/apache2/error

I like -tt because modperl warnings don't otherwise get a timestamp.

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