metron-deployment/ansible/roles/ambari_slave/tasks/hostname.yml

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---
- name: Create ambari-agent hostname script
  template:
    src: "../roles/ambari_slave/files/hostname.sh"
    dest: "/var/lib/ambari-agent/hostname.sh"
    mode: 0744
    owner: "{{ ambari_installation_user }}"
    group: "{{ ambari_installation_user }}"

- name: Configure ambari-server hostname in ambari-agent configuration
  lineinfile:
    dest: /etc/ambari-agent/conf/ambari-agent.ini
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
    insertafter: "{{ item.insertafter }}"
    backup: yes
  with_items:
    - { regexp: "^.*hostname=.*$", line: "hostname={{ groups.ambari_master[0] }}", insertafter: '\[server\]' }
    - { regexp: "^hostname_script=.*$", line: "hostname_script=/var/lib/ambari-agent/hostname.sh", insertafter: '\[agent\]'}