hostname.rb

#
# Cookbook Name:: cloud
# Recipe:: hostname
#

template "/etc/hosts" do
  source "hostname/hosts.erb"
  owner "root"
  group "root"
  mode 0644
  backup false
end

execute "Reset Hostname" do
  command "hostname --file /etc/hostname"
  action :nothing
end

file "/etc/hostname" do
  content node.name
  notifies :run, resources(:execute => "Reset Hostname"), :immediately
end

hosts.erb

127.0.0.1		localhost.localdomain	localhost
<%= node.ipaddress %>		<%= node.name %>