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capchef

Introduction

capchef combines Capistrano with Chef to provide chef capabilities without requiring a chef server.

Install

gem install capchef

Usage

capchef assumes you have a directory structure that looks something like the following:

chef-repo/
  cookbooks/
  roles/
  ...
Gemfile
Capfile
nodes.yml

Your Gemfile might look something like the following:

source :gemcutter
gem 'capistrano'
gem 'capchef'

Your Capfile might look something like the following:

require 'capchef'
require 'capchef/chef_recipes'
require 'capchef/utility_recipes'

# Uncomment the following if running scripts under sudo isn't allowed
#Capchef.use_sudo = false

role :node, *Capchef.all_nodes(ENV['NODE_FILTER'])

# Define the path to the chef-solo executable if it's not in /usr/bin or /usr/local/bin
set :chef_solo_path, '/opt/ruby/bin'

Your nodes.yml might look something like the following:

<% (1..10).each do |i| %>
web<%= i %>:
  run_list:
    - role[web]
<% end %>

<% (1..5).each do |i| %>
app<%= i %>:
  run_list:
    - role[app]
<% end %>

munin:
  munin:
    nodes: <%= (Capchef.all_nodes - ['munin']).join(',') %>
  run_list:
    - recipe[munin::server]
    - recipe[nginx::server]

Then you can install to your hosts with the following command:

cap chef

Or just to your web servers with a command like (filters by regex matching the node names):

NODE_FILTER=web cap chef

To Do

Currently all recipes get rerun whenever you perform a 'cap chef'. I could probably get around this with an option to tar to maintain modification times when extracting the cookbook files.

Author

Brad Pardee :: [email protected]

License

Copyright 2011 Brad Pardee

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.