kubespray/roles/kubernetes-apps/metrics_server/tasks/main.yml

---
# If all masters have node role, there are no tainted master and toleration should not be specified.
- name: Check all masters are node or not
  set_fact:
    masters_are_not_tainted: "{{ groups['kube-node'] | intersect(groups['kube-master']) == groups['kube-master'] }}"

- name: Metrics Server | Delete addon dir
  file:
    path: "{{ kube_config_dir }}/addons/metrics_server"
    state: absent
  when:
    - inventory_hostname == groups['kube-master'][0]
  tags:
    - upgrade

- name: Metrics Server | Create addon dir
  file:
    path: "{{ kube_config_dir }}/addons/metrics_server"
    state: directory
    owner: root
    group: root
    mode: 0755
  when:
    - inventory_hostname == groups['kube-master'][0]

- name: Metrics Server | Templates list
  set_fact:
    metrics_server_templates:
      - { name: auth-delegator, file: auth-delegator.yaml, type: clusterrolebinding }
      - { name: auth-reader, file: auth-reader.yaml, type: rolebinding }
      - { name: metrics-server-cm, file: metrics-server-cm.yaml, type: cm }
      - { name: metrics-server-sa, file: metrics-server-sa.yaml, type: sa }
      - { name: metrics-server-deployment, file: metrics-server-deployment.yaml, type: deploy }
      - { name: metrics-server-service, file: metrics-server-service.yaml, type: service }
      - { name: metrics-apiservice, file: metrics-apiservice.yaml, type: service }
      - { name: resource-reader-clusterrolebinding, file: resource-reader-clusterrolebinding.yaml, type: clusterrolebinding }
      - { name: resource-reader, file: resource-reader.yaml, type: clusterrole }

- name: Metrics Server | Create manifests
  template:
    src: "{{ item.file }}.j2"
    dest: "{{ kube_config_dir }}/addons/metrics_server/{{ item.file }}"
  with_items: "{{ metrics_server_templates }}"
  register: metrics_server_manifests
  when:
    - inventory_hostname == groups['kube-master'][0]

- name: Metrics Server | Apply manifests
  kube:
    name: "{{ item.item.name }}"
    kubectl: "{{ bin_dir }}/kubectl"
    resource: "{{ item.item.type }}"
    filename: "{{ kube_config_dir }}/addons/metrics_server/{{ item.item.file }}"
    state: "latest"
  with_items: "{{ metrics_server_manifests.results }}"
  when:
    - inventory_hostname == groups['kube-master'][0]