Chef Tutorials: template Resource with example

chef-template.rb

Example

# Content of index.html.erb
# index.html.erb must be located at cookbook/templates/index.html.erb

<h1> This is our chef ohai attributes <%=node['platform'] %></h1>
<h1> This is our Recipe attributes <%=node['devopsschool']['message'] %></h1>

<% node['learn_chef_httpd']['default'].each do |key, value| -%>
    <% unless value.empty? -%>
        <%= key %>=<%= value %>
    <% end %>
<% end %>

<%- 4.times do %> 
<%= @hi %>, <%= @world %> from <%= @from %>! 
<%- end %>



# Content of attributes/default.rb 

default['elasticsearch']['default']['ES_USER']              = ''
default['elasticsearch']['default']['ES_GROUP']             = ''
default['elasticsearch']['default']['ES_HEAP_SIZE']         = ''
default['elasticsearch']['default']['MAX_OPEN_FILES']       = ''
default['elasticsearch']['default']['MAX_LOCKED_MEMORY']    = 'unlimited'
default['elasticsearch']['default']['MAX_MAP_COUNT']        = ''
default['elasticsearch']['default']['LOG_DIR']              = '/var/log/elasticsearch'
default['elasticsearch']['default']['DATA_DIR']             = '/var/lib/elasticsearch'
default['elasticsearch']['default']['WORK_DIR']             = '/tmp/elasticsearch'
default['elasticsearch']['default']['CONF_DIR']             = '/etc/elasticsearch'
default['elasticsearch']['default']['CONF_FILE']            = '/etc/elasticsearch/elasticsearch.yml'
default['elasticsearch']['default']['RESTART_ON_UPGRADE']   = ''



# Content of default.rb
template "/var/www/html/index.html" do
  source "index.html.erb"
  owner 'root'
  group 'root'
  mode '0755'
  variables( 
      hi: 'Tesing', 
      world: 'Welt', 
      from: node['fqdn'] 
   )
end


template '/etc/sudoers' do
  source 'sudoers.erb'
  mode '0440'
  owner 'root'
  group 'root'
  variables(sudoers_groups: node['authorization']['sudo']['groups'],
            sudoers_users: node['authorization']['sudo']['users'])
end

Content of templates/default/sudoers.erb
------------------------------------------

#
# /etc/sudoers
#
# Generated by Chef for <%= node['fqdn'] %>
#

Defaults        !lecture,tty_tickets,!fqdn

# User privilege specification
root          ALL=(ALL) ALL

<% @sudoers_users.each  do |user| -%>
<%= user %>   ALL=(ALL) <%= "NOPASSWD:" if @passwordless %>ALL
<% end -%>

# Members of the sysadmin group may gain root privileges
%sysadmin     ALL=(ALL) <%= "NOPASSWD:" if @passwordless %>ALL

<% @sudoers_groups.each do |group| -%>
# Members of the group '<%= group %>' may gain root privileges
<%= group %> ALL=(ALL) <%= "NOPASSWD:" if @passwordless %>ALL
<% end -%>

Content of attributes/default.rb
# --------------------------------------
default['authorization']['sudo']['groups'] = %w(sysadmin wheel admin)
default['authorization']['sudo']['users'] = %w(jerry greg)