Installing Elasticsearch and Couchbase transport plugin via Ansible using elasticsearch role

elasticsearch.yml

- name: Install Elasticsearch
  hosts: rails.myvm
  sudo: true
  vars:
    elasticsearch_install_java: true
    elasticsearch_timezone: Asia/Tokyo
    elasticsearch_plugins:
      - name: 'transport-couchbase'
        url: 'http://packages.couchbase.com.s3.amazonaws.com/releases/elastic-search-adapter/1.2.0/elasticsearch-transport-couchbase-1.2.0.zip'
      - name: 'mobz/elasticsearch-head'
  roles:
    - gpstathis.elasticsearch