varnish Cookbook

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Configures varnish.

Maintainers

This cookbook is maintained by the Sous Chefs. The Sous Chefs are a community of Chef cookbook maintainers working together to maintain important cookbooks. If you’d like to know more please visit sous-chefs.org (opens in a new tab) or come chat with us on the Chef Community Slack in #sous-chefs (opens in a new tab).

Requirements

chef-client

• Requires chef-client 15.5 and above.

Platforms

• CentOS 7+
• Debian 9+
• Ubuntu 18.04+

Other operating systems and Varnish versions may work, but are not explicitly tested or supported.

Global Attributes

These attributes used as defaults for both resources and the varnish::configure cookbook but can be also overridden with other attributes and resource properties described later.

• node['varnish']['conf_path'] - location of the default file that controls the varnish init script on Debian/Ubuntu systems.
• node['varnish']['reload_cmd'] - location of the varnish reload script used by the systemd config file. This is not used for initd currently.
• node['varnish']['conf_source'] - template file source to use for the default varnish init config.
• node['varnish']['conf_cookbook'] - template cookbook source to use for the default varnish init config.
• node['varnish']['major_version'] - the major version of varnish to install. Can be any valid major release. Defaults to 7.0.

Recipes

default

This is not used currently but reserved for minimal configuration needed for all the resources/recipes to work correctly.

configure

Installs the varnish package, manages the varnish configuration file, and the init script defaults file.

Usage

You can either use include the varnish::configure recipe and configure the setup using the recipe attributes described below or use the resources directly.

If running on a Redhat derivative then you may need to include yum-epel as it provides the jemalloc dependency that varnish needs.

Configure Recipe Attributes

Common Settings

The configure recipe uses the resources below to get varnish and varnishlog installed and running from the vendor repo. The recipe will work without any additional configuration however there is a few common attributes that you may want to set.

• node['varnish']['configure']['repo']['action'] - Affects the vendor repo resource. Can be set to :nothing to skip and use the systems package otherwise the default is to :configure it.
• node['varnish']['configure']['package']['version'] - Specific varnish version to pass to the package resource. Default is to install the latest available version for the current node['varnish']['major_version'].
• node['varnish']['configure']['log']['action'] - Affects the varnish_log resource. Can be set to :nothing to skip and not set up logging otherwise the default is to :configure it.
• node['varnish']['configure']['config']['listen_port'] - Port number to listen on for requests to varnish. Defaults to 6081.
• node['varnish']['configure']['vcl_template']['source'] - Name for default vcl template. Defaults to default.vcl.erb.
• node['varnish']['configure']['vcl_template']['cookbook'] - Name of the cookbook for the default vcl template. Uses this varnish cookbook by default.

If you are using the default vcl_template then backend_port and backend_host are configurable through these parameters.

• node['varnish']['configure']['vcl_template']['variables']['config']['backend_port'] - The default vcl_template backend port (default: 80).
• node['varnish']['configure']['vcl_template']['variables']['config']['backend_host'] - The default vcl_template backend_host (default: 127.0.0.1).

Any resource property in the varnish::configure recipe can be configured. The keys under the namespace's listed below will map to the property name. Refer to the resource documentation for details on all the properties.

Recipe Example's

Use the systems varnish package and skip enabling the varnishlog daemon :

node.override['varnish']['configure']['repo']['action'] = :nothing
node.override['varnish']['configure']['log']['action'] = :nothing
 
include_recipe 'varnish::configure'

Use custom.vcl.erb template in my_cookbook and configure varnish to listen on port 80:

node.override['varnish']['configure']['config']['listen_port'] = 80
node.override['varnish']['configure']['vcl_template']['source'] = 'custom.vcl.erb'
node.override['varnish']['configure']['vcl_template']['cookbook'] = 'my_cookbook'
 
include_recipe 'varnish::configure'

Resources

The following resources are provided:

• varnish_config
• varnish_log
• varnish_repo
• vcl_file
• vcl_template

Resource Recipe Example

Install and configure varnish 6.6 using vcl config default.vcl in the current cookbook as well as a backend.vcl template.

include_recipe 'varnish::default'
 
varnish_repo 'configure' do
  major_version 6.6
end
 
package 'varnish'
 
service 'varnish' do
  action [:enable, :start]
end
 
varnish_config 'default' do
  listen_address '0.0.0.0'
  listen_port 80
  storage 'malloc'
  malloc_percent 33
end
 
vcl_template 'backends.vcl' do
  source 'backends.vcl.erb'
  variables(
      backends_ids: Array(1..16),
      env: 'live',
  )
end
 
vcl_file 'default.vcl'
 
# varnishlog
varnish_log 'default'
 
# varnishncsa
varnish_log 'default_ncsa' do
  log_format 'varnishncsa'
end

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