---
# tasks file for k8s_common

- name: Disable swap
  ansible.builtin.command: swapoff -a
  become: true

- name: Add Docker APT repository key
  ansible.builtin.apt_key:
    url: https://download.docker.com/linux/ubuntu/gpg

- name: Add Docker APT repository
  ansible.builtin.apt_repository:
    repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable

- name: create an empty file for the Containerd module
  ansible.builtin.copy:
    content: ""
    dest: /etc/modules-load.d/containerd.conf
    force: no

- name: configure modules for Containerd
  ansible.builtin.blockinfile:
    path: /etc/modules-load.d/containerd.conf
    block: |
         overlay
         br_netfilter

- name: Install required packages
  ansible.builtin.apt:
    name: "{{ item }}"
    state: latest
  become: true
  loop:
    - docker-ce
    - docker-ce-cli
    - curl
    - apt-transport-https
    - containerd.io

- name: create Containerd directory
  ansible.builtin.file:
    path: /etc/containerd
    state: directory

- name: add Containerd configuration
  ansible.builtin.shell: /usr/bin/containerd config default > /etc/containerd/config.toml

- name: configuring the systemd cgroup driver for Containerd
  ansible.builtin.lineinfile:
    path: /etc/containerd/config.toml
    regexp: 'SystemdCgroup = false'
    line: 'SystemdCgroup = true'

- name: enable the Containerd service and start it
  systemd:
    name: containerd
    state: restarted
    enabled: yes
    daemon-reload: yes

- name: Add Kubernetes APT key
  ansible.builtin.shell: curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
  become: true

- name: Add Kubernetes repository
  ansible.builtin.lineinfile:
    path: /etc/apt/sources.list
    line: "deb https://apt.kubernetes.io/ kubernetes-xenial main"
    state: present
  become: true

- name: Update apt cache
  ansible.builtin.apt:
    update_cache: yes
  become: true

- name: Install Kubernetes packages
  ansible.builtin.package:
    name: "{{ item }}"
    state: latest
  become: true
  loop:
    - kubectl
    - kubeadm
    - kubelet
    - kubernetes-cni

- name: enable the Kubelet service, and enable it persistently
  service:
    name: kubelet
    enabled: yes

- name: check Kubelet args in Kubelet config
  ansible.builtin.shell: grep "^Environment=\"KUBELET_EXTRA_ARGS=" /etc/systemd/system/kubelet.service.d/10-kubeadm.conf || true
  register: check_args

- name: add runtime args in Kubelet config
  ansible.builtin.lineinfile:
    dest: "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
    line: "Environment=\"KUBELET_EXTRA_ARGS= --runtime-cgroups=/system.slice/containerd.service --container-runtime-endpoint=unix:///run/containerd/containerd.sock\""
    insertafter: '\[Service\]'
  when: check_args.stdout == ""