kube_drain.yml

#!/usr/bin/env ansible-playbook
---
# This playbook will upgrade kubernetes nodes
#
- name: "Drain Node"
  hosts: kube-node:kube-master
  serial: 1
  remote_user: username
  become: yes
  become_method: sudo
  tasks:

    - name: Mark node "{{ inventory_hostname|lower }}" as Unschedulable.
      kubernetes.core.k8s_drain:
        state: cordon
        kubeconfig: ~/.kube/config
        name: "{{ inventory_hostname|lower }}"
      delegate_to: localhost

    # - name: "Drain node {{ inventory_hostname|lower }}, even if there are pods not managed by a ReplicationController, Job, or DaemonSet on it."
    #   kubernetes.core.k8s_drain:
    #     state: drain
    #     name: "{{ inventory_hostname|lower }}"
    #     kubeconfig: ~/.kube/config
    #     delete_options:
    #       ignore_daemonsets: yes
    #       delete_emptydir_data: yes
    #       force: yes
    #       terminate_grace_period: 0
    #       wait_sleep: 120
    #   delegate_to: localhost
    ## Unable to use: --pod-selector option at this moment. This part will fail is Longhorg in use.
    ## I will leave this commented, maybe needed one day.

    - name: "Drain node {{ inventory_hostname|lower }}, even if there are pods not managed by a ReplicationController, Job, or DaemonSet on it."
      shell: kubectl drain {{ inventory_hostname|lower }} --ignore-daemonsets --delete-emptydir-data --force --pod-selector='app!=csi-attacher,app!=csi-provisioner' --kubeconfig ~/.kube/config
      become_user: user
      delegate_to: localhost

    - name: Pause for 2 minute to relocate PODs'
      pause:
        minutes: 2

    - name: "Upgrade the OS (apt-get dist-upgrade) on {{ inventory_hostname|lower }}"
      apt:
        update_cache: yes
        upgrade: dist

    - name: "Remove useless packages from the cache from {{ inventory_hostname|lower }}"
      apt:
        autoclean: yes

    - name: "Remove dependencies that are no longer required from {{ inventory_hostname|lower }}"
      apt:
        autoremove: yes

    - name: Check if reboot required
      stat:
        path: /var/run/reboot-required
      register: reboot_required_file

    - name: Reboot if required
      reboot:
      when: reboot_required_file.stat.exists == true

    - name: Mark node "{{ inventory_hostname|lower }}" as schedulable.
      kubernetes.core.k8s_drain:
        state: uncordon
        kubeconfig: ~/.kube/config
        name: "{{ inventory_hostname|lower }}"
      delegate_to: localhost