Varnish

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Varnish is a webcache & http accelerator. Varnish will either serve cached content, or retireve content from the server, and cache it. Varnish will reduce I/O pressure from webservers.

Install

Emerge

Install www-servers/varnish

root # www-servers/varnish

Configuration

Configuration is controlled by /etc/varnish/default.vcl

/etc/varnish/default.vcl - varnish configuration file

# backend default {
#     .host = "127.0.0.1";
#     .port = "8080";
# }

Any traffic pointed at port 8080 will be through varnish.

BootService

To start varnish immediately:

root # rc-service varnishd start

To start varnish at boot:

root # rc-update add varnishd default

Verification

To verify that your traffic is going through varnish.

user $ curl -I https://www.varnish-cache.org/

Package:Varnish