Varnish 2.1 - Error 503 during Logrotate

[Tristan CHARBONNIER @ Crealya]

Hello,

 

First, I want to thanks everyone who is contributing to this great piece of
software! Indeed, it's working very well and it's very efficient.

 

I just encounter a small problem : I use varnish/squeeze v2.1.3-8 on a
Debian Linux 6.0 web server with the kernel v2.6.32-5-amd64.

I use Virtualmin to manage this webserver and I set up Varnish on top of
apache2/squeeze v2.2.16-6+squeeze10.

 

During the logrotate process, Varnish gives 503 errors. I traced the problem
to the multiple apache2 graceful restart that are done during this process.

Indeed, I host plenty of websites (more than 100) on my web server and, for
each one, I have a block like this in my '/etc/logrotate.conf' file:

 

/var/log/virtualmin/mywebsite.fr_access_log
/var/log/virtualmin/mywebsite.fr_error_log {

        rotate 5

        weekly

        compress

        postrotate

        /usr/sbin/apache2ctl graceful ; sleep 5

        endscript

}

 

So, during the logrotate process (which lasts for 20 minutes), there is 100+
graceful restart of apache. 'graceful restart' are not supposed to terminate
existing connections so I don't understand why Varnish fails to work:
probably a mistake on my side!

 

In my VCL file, I just have "backend apache { .host = "88.190.19.00"; .port
= "8080"; }" block along with the usual ones (acl purge, vcl_fetch, .). I
use the default Varnish configuration file, except that I raised the memory
to 4G and use ram to store the cache.

 

Any clue on how I can solve this small problem?

 

Thanks in advance,

 

Tristan CHARBONNIER

 

 

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