varnish Cookbook

Configures varnish.

Requirements

chef-client

• Requires chef-client 12.5 and above.
• If you are using chef-client <12.9 and the debian platform family you will need to pin to the 5.X release of the apt cookbook.

Platforms

Tested on the platforms below with distro installs and upstream Varnish packaging versions 3, 4.0, and 4.1 unless otherwise noted.

• Ubuntu 14.04
• Ubuntu 16.04
  • Tested with Ubuntu's 16.04 distribution (version 4.1).
• CentOS 6.8
  • Tested with 3, 4.0, and 4.1 (distro version is 2.0 which is not supported)
• CentOS 7.3
  • Tested with 4.1 and the CentOS 7 distrubution version
  • 4.0 only works with the distro version (https://github.com/sous-chefs/varnish/issues/142)

Other versions may work but require pinning to the correct version which isn't included in this cookbook currently.

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 3.0, 4.0, 4.1, and default's to 4.1.

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 include varnish::default and 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

See the example resource recipe section to see how to use these in your recipe.

varnish_repo

Configure's the varnish vendor repo.

Will configure the varnish repo specified by node['varnish']['major_version'] which can be overridden with the major_version property.

Parameters

Actions

• :configure - Configures the varnish vendor repo.

Examples

Configures the varnish 3.0 vendor repo :

varnish_repo 'varnish' do
  major_version 3.0
end

varnish_config

Configures the Varnish service through the defaults or systemd init file. If you do not include this, the config
files that come with your distro package will be used instead.

You can also send a hash to parameters which will add additional parameters to the varnish daemon via the -p option. The default hash is:

{ 'thread_pools' => '4',
  'thread_pool_min' => '5',
  'thread_pool_max' => '500',
  'thread_pool_timeout' => '300' }

Actions

• :configure - Creates the varnish configuration file from template.

Example

Configure some parameters on the Varnish service :

varnish_config 'default' do
  listen_address '0.0.0.0'
  listen_port 80
  storage 'malloc'
  malloc_percent 33
end

vcl_template

Example

Create vcl file at '/etc/varnish/backends.vcl' using the template at 'templates/default/backends.vcl.erb' and pass it some variables:

vcl_template 'backends.vcl' do
  variables(
      backends_ids: Array(1..16),
      env: 'live',
  )
end

Actions

• :configure - Creates a vcl file from a template and refreshes varnish.
• :unconfigure - Removes the vcl file and refreshes varnish.

vcl_file

Example

Create vcl file at '/etc/varnish/default.vcl' using the file at 'files/default/default.vcl':

vcl_file 'default.vcl'

Actions

• :configure - Creates a vcl file from the cookbook and refreshes varnish.
• :unconfigure - Removes the vcl file and refreshes varnish.

varnish_log

Configures varnishlog or varnishncsa service. You can define both logfiles by calling varnish_log more than once. You can install logrotate config files if you wish as well.

Actions

• :configure - configures the varnishlog or varnishncsa service.

Examples

Configure varnishlog service :

varnish_log 'default'

Configure varnishncsa service :

varnish_log 'default_ncsa' do
  log_format 'varnishncsa'
end

Resource Recipe Example

Install and configure varnish 4.1 using vcl config default.vcl in the current cookbook as well as a backend.vcl template.

include_recipe 'apt'
include_recipe 'varnish::default'

varnish_repo 'configure' do
  major_version 4.1
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

License & Authors

• Author:: Joe Williams joe@joetify.com
• Author:: Lew Goettner lew@goettner.net
• Author:: Matthew Thode matt.thode@rackspace.com
• Author:: Matt Barlow matt.barlow@rackspace.com
• Contributor:: Patrick Connolly patrick@myplanetdigital.com
• Contributor:: Antonio Fernández Vara antoniofernandezvara@gmail.com
• Contributor:: Ryan Gerstenkorn <ryan_gerstenkorn@fastmail.fm>

Copyright 2008-2009, Joe Williams <joe@joetify.com>
Copyright 2014. Patrick Connolly <patrick@myplanetdigital.com>
Copyright 2015. Rackspace, US Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.