c12s-kubespray/roles/dnsmasq/tasks/main.yml

---
- name: ensure dnsmasq.d directory exists
  file:
    path: /etc/dnsmasq.d
    state: directory

- name: ensure dnsmasq.d-available directory exists
  file:
    path: /etc/dnsmasq.d-available
    state: directory

- name: Write dnsmasq configuration
  template:
    src: 01-kube-dns.conf.j2
    dest: /etc/dnsmasq.d-available/01-kube-dns.conf
    mode: 0755
    backup: yes

- name: Stat dnsmasq configuration
  stat: path=/etc/dnsmasq.d/01-kube-dns.conf
  register: sym

- name: Move previous configuration
  command: mv /etc/dnsmasq.d/01-kube-dns.conf /etc/dnsmasq.d-available/01-kube-dns.conf.bak
  changed_when: False
  when: sym.stat.islnk is defined and sym.stat.islnk == False

- name: Enable dnsmasq configuration
  file:
    src: /etc/dnsmasq.d-available/01-kube-dns.conf
    dest: /etc/dnsmasq.d/01-kube-dns.conf
    state: link

- name: Create dnsmasq manifests
  template: src={{item.file}} dest=/etc/kubernetes/{{item.file}}
  with_items:
    - {file: dnsmasq-ds.yml, type: ds}
    - {file: dnsmasq-svc.yml, type: svc}
  register: manifests
  when: inventory_hostname == groups['kube-master'][0]

- name: Start Resources
  kube:
    name: dnsmasq
    namespace: kube-system
    kubectl: "{{bin_dir}}/kubectl"
    resource: "{{item.item.type}}"
    filename: /etc/kubernetes/{{item.item.file}}
    state: "{{item.changed | ternary('latest','present') }}"
  with_items: "{{ manifests.results }}"
  when: inventory_hostname == groups['kube-master'][0]

- name: Check for dnsmasq port (pulling image and running container)
  wait_for:
    host: "{{dns_server}}"
    port: 53
    delay: 5
  when: inventory_hostname == groups['kube-node'][0]


- name: check resolvconf
  shell: which resolvconf
  register: resolvconf
  ignore_errors: yes

- name: target resolv.conf file
  set_fact:
    resolvconffile: >-
      {%- if resolvconf.rc == 0 -%}/etc/resolvconf/resolv.conf.d/head{%- else -%}/etc/resolv.conf{%- endif -%}

- name: generate search domains to resolvconf
  set_fact:
    searchentries="{{ ([ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([])) | join(' ') }}"

- name: generate nameservers to resolvconf
  set_fact:
    nameserverentries="{{ nameservers|default([]) + [ dns_server ] }}"

- name: Add search resolv.conf
  lineinfile:
    line: "search {{searchentries}}"
    dest: "{{resolvconffile}}"
    state: present
    insertbefore: BOF
    backup: yes
    follow: yes

- name: Add local dnsmasq to resolv.conf
  blockinfile:
    dest: "{{resolvconffile}}"
    block: |-
      {% for item in nameserverentries -%}
      nameserver {{ item }}
      {% endfor %}
    state: present
    create: yes
    backup: yes
    follow: yes
    marker: "# Ansible nameservers {mark}"

- name: Add options to resolv.conf
  lineinfile:
    line: options {{ item }}
    dest: "{{resolvconffile}}"
    state: present
    regexp: "^options.*{{ item }}$"
    insertafter: EOF
    backup: yes
    follow: yes
  with_items:
    - timeout:2
    - attempts:2

- name: Remove search and nameserver options from resolvconf base
  lineinfile:
    dest: /etc/resolvconf/resolv.conf.d/base
    state: absent
    regexp: "^{{ item }}.*$"
    backup: yes
    follow: yes
  with_items:
    - search
    - nameserver
  when: resolvconf.rc == 0

- name: disable resolv.conf modification by dhclient
  copy: src=dhclient_nodnsupdate dest=/etc/dhcp/dhclient-enter-hooks.d/znodnsupdate mode=0755
  notify: Dnsmasq | restart network
  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
  notify: Dnsmasq | restart network
  when: ansible_os_family == "RedHat"