RHEL/CentOS

• Daemon configuration: /etc/sysconfig/varnish
• Cache configuration: /etc/varnish/default.vcl

Debugging the configuration

• Test the VCL:

  /usr/sbin/varnishd -d -f /etc/varnish/default.vcl

• Trace the client and backend connections:

  varnishlog

  • Communication between Varnish and the client is marked with "c".
  • Communication between Varnish and the backend is marked with "b".