---

# ---
# Install 'bind' apt based OS
# ---

- name: (caching-nameserver.yml) update
  apt:
    update_cache: true
    cache_valid_time: "{{ 0 if apt_config_updated is defined and apt_config_updated.changed else apt_update_cache_valid_time }}"
  when:
    - ansible_distribution == "Debian"
    - apt_update|bool
  tags:
    - apt-caching-nameserver


- name: (caching-nameserver.yml) dpkg --configure
  command: >
    dpkg --configure -a
  args:
    warn: false
  changed_when: _dpkg_configure.stdout_lines | length
  register: _dpkg_configure
  when:
    - ansible_distribution == "Debian"
    - apt_update|bool
  tags:
    - apt-caching-nameserver


- name: (caching-nameserver.yml) upgrade
  apt:
    upgrade: "{{ apt_upgrade_type }}"
    update_cache: true
    dpkg_options: "{{ apt_upgrade_dpkg_options | join(',') }}"
  when:
    - ansible_distribution == "Debian"
    - apt_dpkg_configure|bool
  tags:
    - apt-caching-nameserver


- name: (caching-nameserver.yml) Install bind packages (using apt)
  apt:
    name: "{{ apt_bind_pkgs }}"
    state: present
  when:
    - ansible_distribution == "Debian"
    - install_bind_packages|bool == true
  tags:
    - apt-caching-nameserver

# ---
# Install 'bind' - yum based OS
# ---

- name: (yum.yml) Install system updates for centos systems
  yum:
    name: '*'
    state: latest
    update_cache: yes
    #cache_valid_time: 3600
  when:
    - ansible_os_family == "RedHat"
    - ansible_distribution == "CentOS"
  tags:
    - yum-update

- name: (yum.yml) Install bind packages (using yum)
  yum:
    name: "{{ yum_bind_pks }}"
    state: "{{ yum_install_state }}"
  when:
    - ansible_os_family == "RedHat"
    - ansible_distribution == "CentOS"
  tags:
    - yum-caching-nameserver

# ---
# Configure bind on debian systems
# --

- name: (caching-nameserver.yml) Create directory /var/log/named if it does not exist
  file:
    path: /var/log/named
    state: directory
    owner: bind
    group: bind
    mode: '0755'
  when:
    - ansible_distribution == "Debian"


- name: (caching-nameserver.yml) update named.conf.options configuration file (normal server)
  template:
    src: etc/bind/named.conf.options.j2
    dest: /etc/bind/named.conf.options
    backup: yes
    owner: root
    group: bind
    mode: 0644
    #validate: visudo -cf %s
  notify: Reload bind9
  tags:
    - apt-caching-nameserver
    - caching-nameserver
  when: 
    - ansible_distribution == "Debian"
    - inventory_hostname not in groups["gateway_server"]

# --------------------

# In case of gateway gateway servers ONLY if bind ption file NOT exists
#
- name: Check if file '/etc/bind/named.conf.options' exists
  stat:
    path: /etc/bind/named.conf.options
  register: file_named_conf_options

- name: (caching-nameserver.yml) update named.conf.options configuration file (gateway server)
  template:
    src: etc/bind/named.conf.options.gateway.j2
    dest: /etc/bind/named.conf.options
    backup: yes
    owner: root
    group: bind
    mode: 0644
    #validate: visudo -cf %s
  notify: Reload bind9
  tags:
    - apt-caching-nameserver
    - caching-nameserver
  when: 
    - ansible_distribution == "Debian"
    - inventory_hostname in groups["gateway_server"]
#    - not file_named_conf_options.stat.exists

# --------------------


- name: (caching-nameserver.yml) Add 127.0.0.1 as first nameserver entry to /etc/resolv.conf
  lineinfile:
    path: /etc/resolv.conf
    line: nameserver 127.0.0.1
    firstmatch: yes
    insertbefore: '^nameserver'
    state: present
    owner: root
    group: root
    mode: '0644'
  tags:
    - apt-caching-nameserver
  when: 
    - ansible_distribution == "Debian"