kubespray/roles/dnsmasq/tasks/main.yml

---
- name: populate inventory into hosts file
  lineinfile:
    dest: /etc/hosts
    regexp: "^{{ hostvars[item].ansible_default_ipv4.address }} {{ item }}$"
    line: "{{ hostvars[item].ansible_default_ipv4.address }} {{ item }}"
    state: present
  when: hostvars[item].ansible_default_ipv4.address is defined
  with_items: groups['all']

- name: clean hosts file
  lineinfile:
    dest: /etc/hosts
    regexp: "{{ item }}"
    state: absent
  with_items:
    - '^127\.0\.0\.1(\s+){{ inventory_hostname }}.*'
    - '^::1(\s+){{ inventory_hostname }}.*'

- name: install dnsmasq and bindr9utils
  apt:
    name: "{{ item }}"
    state: present
  with_items:
    - dnsmasq
    - bind9utils
  when: inventory_hostname in groups['kube-master'][0]

- name: ensure dnsmasq.d directory exists
  file:
    path: /etc/dnsmasq.d
    state: directory
  when: inventory_hostname in groups['kube-master'][0]

- name: configure dnsmasq
  template:
    src: 01-kube-dns.conf.j2
    dest: /etc/dnsmasq.d/01-kube-dns.conf
    mode: 755
  notify:
    - restart dnsmasq
  when: inventory_hostname in groups['kube-master'][0]

- name: enable dnsmasq
  service:
    name: dnsmasq
    state: started
    enabled: yes
  when: inventory_hostname in groups['kube-master'][0]

- name: update resolv.conf with new DNS setup
  template:
    src: resolv.conf.j2
    dest: /etc/resolv.conf
    mode: 644

- name: disable resolv.conf modification by dhclient
  copy: src=dhclient_nodnsupdate dest=/etc/dhcp/dhclient-enter-hooks.d/nodnsupdate mode=u+x