- hosts: all
  become: true
  tasks:
  - name: Install packages that allow apt to be used over HTTPS
    apt:
      name: "{{ packages }}"
      state: present
    vars:
      packages:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common

  - name: Add the apt signing key for Docker
    apt_key:
      url: https://download.docker.com/linux/ubuntu/gpg
      state: present

  - name: Add the apt repository for the stable Docker version
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable
      state: present

  - name: Install Docker and its dependencies
    apt:
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - docker-ce
      - docker-ce-cli
      - containerd.io

  - name: Ensure user group exists
    group:
      name: "{{ ansible_user }}"

  - name: Add user to the docker group
    user:
      name: "{{ ansible_user }}"
      groups: docker,{{ ansible_user }}
      append: yes

  - name: Remove swapfile from /etc/fstab
    mount:
      name: "{{ item }}"
      fstype: swap
      state: absent
    with_items:
      - swap
      - none

  - name: Disable swap
    command: swapoff -a
    when: ansible_swaptotal_mb > 0

  - name: Add the apt signing key for Kubernetes
    apt_key:
      url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
      state: present

  - name: Add the apt repository for Kubernetes
    apt_repository:
      repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
      state: present
      filename: kubernetes.list

  - name: Install Kubernetes binaries
    apt:
      name: "{{ packages }}"
      update_cache: yes
    vars:
      packages:
        - kubelet=1.19.16-00
        - kubeadm=1.19.16-00
        - kubectl=1.19.16-00

  - name: Restart kubelet
    service:
      name: kubelet
      daemon_reload: yes
      state: restarted

  - name: Making systemd as Cgroup Driver
    copy:
      src: daemon.json
      dest: /etc/docker/daemon.json

  - name: Restaring Docker...
    service:
      name: docker
      state: restarted

  - name: update sysctl param
    copy:
      src: k8s.conf
      dest: /etc/sysctl.d/k8s.conf
      owner: root
      group: root

  - name: System reload
    shell: sysctl --system

  - name: Initialize the Kubernetes cluster
    become: true
    command: kubeadm init --pod-network-cidr=10.244.0.0/16

  - name: Setup kubeconfig
    command: "{{ item }}"
    with_items:
     - mkdir -p "$HOME/.kube"
     - sudo cp /etc/kubernetes/admin.conf "$HOME/.kube/config"
     - sudo chown "{{ ansible_user }}:{{ ansible_user }}" "$HOME/.kube/config"

  - name: Deploy Flannel
    become: true
    command: kubectl apply -f https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml

  - name: Remove taints from master node
    become: true
    command: kubectl taint nodes --all node-role.kubernetes.io/master-

  - name: Create Tiller service account
    become: true
    command: kubectl -n kube-system create serviceaccount tiller

  - name: Setup Tiller ClusterBinding
    become: true
    command: kubectl create clusterrolebinding tiller --clusterrole=cluster-admin --serviceaccount=kube-system:tiller