---
# Target: centos8
- hosts: k8s
  vars: 
    username: k8s
    home_directory: "/home/{{ username }}"
    k8s_version: 1.17.0
  tasks:
  - name: Ensuring group exists
    group:
      name: "{{ username }}"
      state: present
  - name: Creating user and making home directory
    user:
      system: yes
      state: present
      name: "{{ username }}"
      groups: "{{ username }}"
      home: "{{ home_directory }}"
  - name: Adding Docker repository
    get_url:
      url: https://download.docker.com/linux/centos/docker-ce.repo
      dest: /etc/yum.repos.d/
  - name: Installing Docker
    yum:
      state: present
      update_cache: yes
      name:
        - docker-ce-3:18.09.1-3.el7
        - docker-ce-cli-1:18.09.1-3.el7
        - containerd.io-1.2.0-3.el7
        - tc
  - name: Creating docker directory
    file:
      path: /etc/docker
      state: directory
      mode: '0755'
  - name: Copying Docker daemon configuration
    copy:
      src: daemon.json
      dest: /etc/docker/daemon.json
      owner: root
      group: root
      mode: '0644'
    register: dockerDaemonConfig
  - name: Creating containerd override directory
    file:
      path: /etc/systemd/system/containerd.service.d/
      state: directory
      mode: '0755'
  - name: Copying containerd override configuration
    copy:
      src: containerd-override.conf
      dest: /etc/systemd/system/containerd.service.d/override.conf
      owner: root
      group: root
      mode: '0644'
  - name: Reloading systemd daemon
    systemd:
      daemon_reload: yes
  - name: Ensuring Docker is enabled and started
    systemd:
      name: docker
      state: started
      enabled: yes
  - name: Restarting Docker due to daemon config change
    systemd:
      name: docker
      state: restarted
    when: dockerDaemonConfig.changed
  - name: Adding Kubernetes repository
    yum_repository:
      name: kubernetes
      file: kubernetes
      description: Kubernetes Repo
      baseurl: https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
      gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
      gpgcheck: yes
  - name: Installing kubelet and kubeadm on nodes
    yum:
      state: present
      update_cache: yes
      name:
        - kubelet-{{ k8s_version }}-0
        - kubeadm-{{ k8s_version }}-0

- hosts: k8s_master
  vars: 
    username: k8s
    home_directory: "/home/{{ username }}"
    k8s_version: 1.17.0
  tasks:
    - name: Installing kubectl on master
      yum:
        state: present
        name:
          - kubectl-{{ k8s_version }}-0
    - name: Copying kubelet environment file
      copy:
        src: kubelet
        dest: /etc/sysconfig/kubelet
        mode: '0644'
    - name: Initialize Kubernetes cluster
      shell: > 
        kubeadm init --ignore-preflight-errors all --v=5 > k8s_cluster_initialization.log && 
        touch .k8s_cluster_initialized
      args: 
        chdir: "{{ home_directory }}"
        creates: .k8s_cluster_initialized
      register: output
    - debug: var=output
    - block:
      - name: Cloning repository
    become: true
    become_user: "{{ username }}"