Collecting Varnish Logs

For each machine running Varnish:

1. Add the following line to /etc/rc.local:

   $ varnishncsa -a -w /var/log/varnish/access.log -D -P /var/run/varnishncsa.pid

2. Configure log rotation by adding the following line to

   $ /etc/logrotate.d/varnish

   (create it if it doesn't exist):

   /var/log/varnish/*log {
       create 640 http log
       compress
       postrotate
           /bin/kill -USR1 `cat /var/run/varnishncsa.pid 2>/dev/null` 2> /dev/null || true
       endscript
   }

3. Add a local file source to your collector pointing to the path(/var/log/varnish/*.log) defined above