Varnish

The Lagoon Varnish image Dockerfile. Based on the official varnish package provided by alpine:3.7 image.

By default, vmod-dynamic and vmod-bodyaccess modules are installed.

Lagoon adaptions

This image is prepared to be used on Lagoon. There are therefore some things already done:

• Folder permissions are automatically adapted with fix-permissions, so this image will work with a random user.

Included varnish modules

• vbox-dynamic - Dynamic backends from DNS lookups and service discovery from SRV records.
• vbox-bodyaccess - Varnish vmod that lets you access the request body.

Included default.vcl configuration file

The image ships a default vcl configuration file, optimized to work on Lagoon. Some options are configurable via environments variables (see Environment Variables).

Environment Variables

Environment variables defined in Varnish base image

Environment Variable	Default	Description
VARNISH_BACKEND_HOST	NGINX	Default backend host.
VARNISH_BACKEND_PORT	8080	Default listening varnish port.
VARNISH_SECRET	lagoon_default_secret	Varnish secret used to connect to management.
LIBVMOD_DYNAMIC_VERSION	5.2	Default version of vmod-dynamic module.
LIBVMOD_BODYACCESS_VERSION	5.0	Default version of vmod-bodyaccess module.
HTTP_RESP_HDR_LEN	8k	Maximum length of any HTTP backend response header.
HTTP_RESP_SIZE	32k	Maximum number of bytes of HTTP backend response we will deal with.
NUKE_LIMIT	150	Maximum number of objects we attempt to nuke in order to make space for an object body.
CACHE_TYPE	malloc	Type of varnish cache.
CACHE_SIZE	100M	Cache size.
LISTEN	8080	Default backend server port.
MANAGEMENT_LISTEN	6082	Default management listening port.