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
    backup: yes
  when: hostvars[item].ansible_default_ipv4.address is defined
  with_items: groups['all']

- name: populate kubernetes loadbalancer address into hosts file
  lineinfile:
    dest: /etc/hosts
    regexp: ".*{{ apiserver_loadbalancer_domain_name }}$"
    line: "{{ loadbalancer_apiserver.address }} lb-apiserver.kubernetes.local"
    state: present
    backup: yes
  when: loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined

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

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

- name: Write dnsmasq configuration
  template:
    src: 01-kube-dns.conf.j2
    dest: /etc/dnsmasq.d/01-kube-dns.conf
    mode: 755
    backup: yes
  when: inventory_hostname in groups['kube-master']

- name: Create dnsmasq pod manifest
  template: src=dnsmasq-pod.yml dest=/etc/kubernetes/manifests/dnsmasq-pod.manifest
  when: inventory_hostname in groups['kube-master']

- name: Check for dnsmasq port (pulling image and running container)
  wait_for:
    port: 53
    delay: 5
  when: inventory_hostname in groups['kube-master']

- name: check resolvconf
  stat: path=/etc/resolvconf/resolv.conf.d/head
  register: resolvconf

- name: target resolv.conf file
  set_fact:
    resolvconffile: >-
      {%- if resolvconf.stat.exists == True -%}/etc/resolvconf/resolv.conf.d/head{%- else -%}/etc/resolv.conf{%- endif -%}

- name: Add search resolv.conf
  lineinfile:
    line: search {{ [ 'default.svc.' + dns_domain, 'svc.' + dns_domain, dns_domain ] | join(' ') }}
    dest: "{{resolvconffile}}"
    state: present
    insertbefore: BOF
    backup: yes
    follow: yes

- name: Add all masters as nameserver
  lineinfile:
    line: nameserver {{ hostvars[item]['ansible_default_ipv4']['address'] }}
    dest: "{{resolvconffile}}"
    state: present
    insertafter: "^search.*$"
    backup: yes
    follow: yes
  with_items: groups['kube-master']

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

- name: disable resolv.conf modification by dhclient
  copy: src=dhclient_nodnsupdate dest=/etc/dhcp/dhclient.d/nodnsupdate mode=u+x backup=yes
  when: ansible_os_family == "RedHat"

- name: update resolvconf
  command: resolvconf -u
  changed_when: False
  when: resolvconf.stat.exists == True

- meta: flush_handlers