In order to use this plugin you will need ensure that the following are in your runlist:
recipe[ec2-tags-ohai-plugin]
The recipe will install the required aws-sdk gem and the ec2-tags plugin at
compile time, so it is recommended that this is the first recipe in your runlist
so that the node data it creates can be consumed during the rest of the compilation.
Once the plugin has been installed by the ec2-tags-ohai-plugin recipe,
the instance tags will be available under node['ec2']['tags'] as a hash with
the tag key being the hash key, i.e
puts node['ec2']['tags']
# {
# 'Name' => 'instance_name',
# 'my_custom_tag' => 'value'
# }