Add configuration recipe.

attributes/default.rb

 default['cookbook-gitlab-runner']['docker-machine']['install'] = true
 default['cookbook-gitlab-runner']['docker-machine']['version'] = "0.7.0"
 default['cookbook-gitlab-runner']['docker-machine']['checksum'] = "21e490d5cdfa0d21e543e06b73180614f72e6c18a940f476a64cf084cea23aa5"
+default['cookbook-gitlab-runner']['global_config'] = { "concurrent" => 1 }
+default['cookbook-gitlab-runner']['runners'] = []

libraries/quote_helper.rb

+module QuoteHelper
+  def quote(value)
+    if value && value.is_a?(String)
+      "\"#{value}\""
+    else
+      value
+    end
+  end
+end

recipes/default.rb

@@ -5,5 +5,6 @@
 # Copyright 2016, GitLab Inc.
 #
-include_recipe 'runner_install'
 include_recipe 'docker_install'
+include_recipe 'runner_install'
+include_recipe 'runner_configure'

recipes/docker_install.rb

@@ -34,3 +34,10 @@ if node['cookbook-gitlab-runner']['docker-machine']['install']
     not_if "/usr/bin/docker-machine --version | grep #{node['cookbook-gitlab-runner']['docker-machine']['version']}"
   end
 end
+
+# Restart Docker after iptables-persistent for nat rules
+template '/etc/rc.local' do
+  owner  'root'
+  group  'root'
+  mode   '0755'
+end

recipes/runner_configure.rb

+#
+# Cookbook Name:: cookbook-gitlab-runner
+# Recipe:: runner_configure
+#
+# Copyright 2016, GitLab Inc.
+#
+
+
+template '/etc/gitlab-runner/config.toml' do
+  source "config.toml.erb"
+  owner 'root'
+  group 'root'
+  mode '0600'
+  helpers QuoteHelper
+  variables(
+    global: node['cookbook-gitlab-runner']['global_config'],
+    runners: node['cookbook-gitlab-runner']['runners']
+  )
+end

templates/default/config.toml.erb

+<% @global.each do |name, value| %>
+<%= name %> = <%= value %>
+<% end %>
+
+<% @runners.each do |n, runner| %>
+[[runners]]
+  <% if runner.has_key?('global') %>
+  <% runner['global'].each do |name, value| %>
+  <%= name %> = <%= quote(value) %>
+  <% end %>
+  <% end %>
+
+  <% if runner.has_key?('docker') %>
+  [runners.docker]
+  <% runner['docker'].each do |name, value| %>
+    <%= name %> = <%= quote(value) %>
+  <% end %>
+  <% end %>
+
+  <% if runner.has_key?('machine') %>
+  [runners.machine]
+  <% runner['machine'].each do |name, value| %>
+    <%= name %> = <%= quote(value) %>
+  <% end %>
+  <% end %>
+
+  <% if runner.has_key?('cache') %>
+  [runners.cache]
+  <% runner['cache'].each do |name, value| %>
+    <%= name %> = <%= quote(value) %>
+  <% end %>
+  <% end %>
+<% end %>

templates/default/rc.local.erb

+#!/bin/sh -e
+#
+# rc.local
+#
+# Managed by Chef - Local Changes will be Nuked from Orbit
+#
+# This script is executed at the end of each multiuser runlevel.
+# Make sure that the script will "exit 0" on success or any other
+# value on error.
+#
+# In order to enable or disable this script just change the execution
+# bits.
+#
+# By default this script does nothing.
+test -e /etc/ssh/ssh_host_dsa_key || dpkg-reconfigure openssh-server
+
+# Restart docker after iptables-persistent for nat rules
+/usr/sbin/service docker restart
+
+exit 0