kubespray/roles/kubernetes-apps/ansible/tasks/coredns.yml

---
- name: Kubernetes Apps | Lay Down CoreDNS Template
  action: "{{ item.module }}"
  args:
    src: "{{ item.file }}{% if item.module == 'template' %}.j2{% endif %}"
    dest: "{{ kube_config_dir }}/{{ item.file }}"
  with_items:
    - { name: coredns, module: template, file: coredns-config.yml, type: configmap }
    - { name: coredns, module: copy, file: coredns-sa.yml, type: sa }
    - { name: coredns, module: template, file: coredns-deployment.yml, type: deployment }
    - { name: coredns, module: template, file: coredns-svc.yml, type: svc }
    - { name: coredns, module: copy, file: coredns-clusterrole.yml, type: clusterrole }
    - { name: coredns, module: copy, file: coredns-clusterrolebinding.yml, type: clusterrolebinding }
    - { name: dns-autoscaler, module: copy, file: dns-autoscaler-sa.yml, type: sa }
    - { name: dns-autoscaler, module: copy, file: dns-autoscaler-clusterrole.yml, type: clusterrole }
    - { name: dns-autoscaler, module: copy, file: dns-autoscaler-clusterrolebinding.yml, type: clusterrolebinding }
    - { name: dns-autoscaler, module: template, file: dns-autoscaler.yml, type: deployment }
  register: coredns_manifests
  vars:
    clusterIP: "{{ skydns_server }}"
  when:
    - dns_mode in ['coredns', 'coredns_dual']
    - inventory_hostname == groups['kube-master'][0]
  tags:
    - coredns

- name: Kubernetes Apps | Lay Down Secondary CoreDNS Template
  template:
    src: "{{ item.src }}.j2"
    dest: "{{ kube_config_dir }}/{{ item.file }}"
  with_items:
    - { name: coredns, src: coredns-deployment.yml, file: coredns-deployment-secondary.yml, type: deployment }
    - { name: coredns, src: coredns-svc.yml, file: coredns-svc-secondary.yml, type: svc }
    - { name: dns-autoscaler, src: dns-autoscaler.yml, file: coredns-autoscaler-secondary.yml, type: deployment }
  register: coredns_secondary_manifests
  vars:
    clusterIP: "{{ skydns_server_secondary }}"
    coredns_ordinal_suffix: "-secondary"
  when:
    - dns_mode == 'coredns_dual'
    - inventory_hostname == groups['kube-master'][0]
  tags:
    - coredns