kubeadm-upgrade.yml

---
# Kubeadm cluster upgrade playbook
#
# Based on:
# https://v1-23.docs.kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/
#
# Master nodes should be upgraded manually
# Draining nodes not included in this playbook


- name: Kubernetes cluster upgrade - worker nodes
  hosts: hosts_to_configure 
  vars:
    version: 1.23.15-00
    version_format: v1.23.15
  gather_facts: False
  become: yes
  serial: 1
  tasks:

    - name: Upgrade kubeadm
      ansible.builtin.apt:
        name: "kubeadm={{ version }}"
        state: present
        update_cache: yes
        allow_change_held_packages: true

    - name: Upgrade node
      ansible.builtin.command: kubeadm upgrade node
      register: result

    - name: Print the full output
      ansible.builtin.debug:
        var: result

    - ansible.builtin.pause:
        prompt: "Wait for stabilization.."
        seconds: 5

    - name: Kubeadm - check version
      ansible.builtin.command: kubeadm version -o short
      register: version_kubeadm

    - name: Upgrade kubelet and kubectl
      ansible.builtin.apt:
        name: "{{ item }}"
        state: present
        allow_change_held_packages: true
        allow_downgrade: true
      with_items:
        - "kubelet={{ version }}"
        - "kubectl={{ version }}"
      when: version_kubeadm.stdout == version_format

    - name: Kubelet - check version
      ansible.builtin.command: kubelet --version
      register: version_kubelet

    - name: Kubelet - print version
      ansible.builtin.debug:
        var: version_kubelet.stdout

    - name: Kubectl - check version
      ansible.builtin.command: kubectl version --client --short=true
      register: version_kubectl

    - name: Kubectl - print version
      ansible.builtin.debug:
        var: version_kubectl.stdout

    - name: Daemon-reload & restart kubelet
      ansible.builtin.systemd:
        state: restarted
        daemon_reload: yes
        name: kubelet
      when: version_kubelet.stdout is search('v1.23.15')

    - ansible.builtin.pause:
        prompt: "Wait for stabilization.."
        seconds: 15