HA K8S Join Control Planes

Contents

Abstract

This role joins additional control planes to a high availability k8s cluster.

HA K8S Join Control Planes#

Tasks#

This role joins remaining control planes to the new cluster. It should be run after the init role and before the kv role.

---
- name: Configure netfilter and ip
  ansible.builtin.copy:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    owner: root
    group: root
    mode: ug+rw,o-rwx
  loop:
    - src: modules-k8s.conf
      dest: /etc/modules-load.d/k8s.conf
    - src: sysctl-k8s.conf
      dest: /etc/sysctl.d/k8s.conf
- name: Enable deployed updates
  ansible.builtin.shell:
    cmd: sysctl --system
- name: Enable kubelet
  ansible.builtin.service:
    state: restarted
    name: kubelet
    enabled: true
- name: Load join command
  ansible.builtin.shell:
    cmd: grep -A 3 'kubeadm join' roles/join/files/join.md | head -3
  register: join_cmd
  delegate_to: localhost
- name: Output join command
  ansible.builtin.shell:
    cmd: "{{ join_cmd.stdout }} > /root/join_result.md"
  register: join_result
- name: Fetch join results
  ansible.builtin.fetch:
    src: /root/join_result.md
    dest: "roles/join/files/{{ inventory_hostname }}/join_result.md"
    flat: true
- name: Ensure .kube exists
  ansible.builtin.file:
    dest: "{{ item.dest }}"
    owner: "{{ item.owner }}"
    group: kube
    mode: u+rwx,g+rx,o-rwx
    state: directory
  loop:
    - owner: root
      dest: /root/.kube
    - owner: "{{ join_nonroot }}"
      dest: "/home/{{ join_nonroot }}/.kube"
- name: Copy admin.conf
  ansible.builtin.copy:
    src: roles/init/files/admin.conf
    dest: "{{ item.path }}"
    owner: "{{ item.owner }}"
    group: kube
    mode: u+rw,o-rwx
  loop:
    - path: /root/.kube/config
      owner: root
    - path: "/home/{{ join_nonroot }}/.kube/config"
      owner: "{{ join_nonroot }}"

Section author: Xander Harris xandertheharris@gmail.com

Contents