Varnish

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www-servers/varnish


Source Repository:Repository:Gentoo Portage Tree


Summary: Varnish is a state-of-the-art, high-performance HTTP accelerator

Use Flags

tools
Build additional tools: varnishhist, varnishstat, varnishtop, varnishsizes
jemalloc
Use dev-libs/jemalloc for allocations

News

Drobbins

Keychain 2.8.2 Released

Keychain 2.8.2, a maintenance and bug fix release, is now available.
2015-11-16 by Drobbins
Drobbins

Unfork Tree is Live!

The "unfork" tree is now merged into the main Funtoo Linux tree, and Funtoo Linux is now using shards for core packages, x11 (including media libraries), KDE, GNOME, python and perl.
2015-10-12 by Drobbins
Drobbins

OpenSSH 7 Disables DSA Keys By Default

Please be aware of this important change to avoid getting locked out of your Funtoo server.
2015-10-07 by Drobbins
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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 Package:Varnish:

# emerge www-servers/varnish

Configuration

Configuration is controlled by /etc/varnish/default.vcl & /etc/conf.d/varnishd

/etc/varnish/default.vcl - varnish configuration file
vcl 4.0;
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}
/etc/conf.d/varnishd - varnish configuration file
VARNISHD="/usr/sbin/varnishd"
VARNISHADM="/usr/bin/varnishadm"
CONFIGFILE="/etc/varnish/default.vcl"
VARNISHD_OPTS="-a 127.0.0.1:80"
VARNISHD_OPTS="${VARNISHD_OPTS} -u varnish -g varnish"

Varnish will fetch data from localhost:8080 and serve accelerated proxy data on localhost:80

BootService

To start varnish immediately:

# rc-service varnishd start

To start varnish at boot:

# rc-update add varnishd default

Verification

To verify that your traffic is going through varnish.

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

Benchmarking

If your system has apache installed apache benchmark can show the power of varnish. The examples shown are running 500 requests with concurrency of 100 hits. ab against a 3 worker cluster mode puma server

# ab -n 500 -c 100 http://127.0.0.1:3000/index.html | grep Request

Requests per second: 110.92 [#/sec] (mean) ab against the same server served through varnish

# ab -n 500 -c 100 http://127.0.0.1/index.html | grep Request

Requests per second: 10268.42 [#/sec] (mean)

SSL support

Varnish does not support ssl. There are packages to get around this limitation:

Media