c12s-kubespray/roles/kubernetes/master/tasks/kubeadm-setup.yml

---
- name: kubeadm | aggregate all SANs
  set_fact:
    apiserver_sans: >-
      kubernetes
      kubernetes.default
      kubernetes.default.svc
      kubernetes.default.svc.{{ dns_domain }}
      {{ kube_apiserver_ip }}
      localhost
      127.0.0.1
      {{ ' '.join(groups['kube-master']) }}
      {%- if loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined %}
      {{ apiserver_loadbalancer_domain_name }}
      {%- endif %}
      {%- for host in groups['kube-master'] -%}
      {%- if hostvars[host]['access_ip'] is defined %}{{ hostvars[host]['access_ip'] }}{% endif %}
      {{ hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
      {%- endfor %}
  tags: facts

- name: kubeadm | Copy etcd cert dir under k8s cert dir
  command: "cp -TR {{ etcd_cert_dir }} {{ kube_config_dir }}/ssl/etcd"
  changed_when: false

- name: kubeadm | Create kubeadm config
  template:
    src: kubeadm-config.yaml.j2
    dest: "{{ kube_config_dir }}/kubeadm-config.yaml"
  register: kubeadm_config

- name: Check if kubeadm has already run
  stat:
    path: "{{ kube_config_dir }}/admin.conf"
  register: admin_conf


- name: kubeadm | Initialize first master
  command: timeout -k 240s 240s kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks
  register: kubeadm_init
  #Retry is because upload config sometimes fails
  retries: 3
  when: inventory_hostname == groups['kube-master']|first and (kubeadm_config.changed or not admin_conf.stat.exists)

- name: slurp kubeadm certs
  slurp:
    src: "{{ item }}"
  with_items:
    - "{{ kube_cert_dir }}/apiserver.crt"
    - "{{ kube_cert_dir }}/apiserver.key"
    - "{{ kube_cert_dir }}/apiserver-kubelet-client.crt"
    - "{{ kube_cert_dir }}/apiserver-kubelet-client.key"
    - "{{ kube_cert_dir }}/ca.crt"
    - "{{ kube_cert_dir }}/ca.key"
    - "{{ kube_cert_dir }}/front-proxy-ca.crt"
    - "{{ kube_cert_dir }}/front-proxy-ca.key"
    - "{{ kube_cert_dir }}/front-proxy-client.crt"
    - "{{ kube_cert_dir }}/front-proxy-client.key"
    - "{{ kube_cert_dir }}/sa.key"
    - "{{ kube_cert_dir }}/sa.pub"
  register: kubeadm_certs
  delegate_to: "{{ groups['kube-master']|first }}"
  run_once: true

- name: write out kubeadm certs
  copy:
    dest: "{{ item.item }}"
    content: "{{ item.content | b64decode }}"
    owner: root
    group: root
    mode: 0700
  no_log: true
  register: copy_kubeadm_certs
  with_items: "{{ kubeadm_certs.results }}"
  when: inventory_hostname != groups['kube-master']|first

- name: kubeadm | Initialize other masters
  command: timeout -k 240s 240s kubeadm init --config={{ kube_config_dir }}/kubeadm-config.yaml --skip-preflight-checks
  register: kubeadm_init
  #Retry is because upload config sometimes fails
  retries: 3
  when: inventory_hostname != groups['kube-master']|first and (kubeadm_config.changed or not admin_conf.stat.exists or copy_kubeadm_certs.changed)