docker_install.yaml

---
- name: Install docker
  hosts: all
  gather_facts: yes
  become: true

  tasks: 
    - name: change DNS to Shecan
      lineinfile:
        path: /etc/resolv.conf
        regexp: '^nameserver'
        line: nameserver 185.51.200.2

    - name: Update apt-get repo and cache
      when: ansible_os_family == "Debian"
      apt: update_cache=yes force_apt_get=yes cache_valid_time=3600

    - name: upgrade all packages
      when: ansible_os_family == "RedHat"
      yum: name=* state=latest
  
    - name: Install packages that allow apt to be used over HTTPS
      when: ansible_os_family == "Debian"
      apt:
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - apt-transport-https
        - ca-certificates
        - curl
        - gnupg-agent
        - software-properties-common
        - lsb-release
  
  # - name: change DNS to Shecan
  #   command: 'echo "nameserver 185.51.200.2" > /etc/resolv.conf'

  # - name: Add two IPv4 DNS server addresses
  #   community.general.nmcli:
  #     conn_name: my-eth1
  #     type: ethernet
  #     dns4:
  #     - 185.51.200.2
  #     state: present

    - name: Add an apt signing key for Docker
      when: ansible_os_family == "Debian" 
      apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present
  
    - name: Add apt repository for stable version
      when: ansible_os_family == "Debian"  
      apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
        state: present

    - name: Install docker and its dependecies
      when: ansible_os_family == "Debian"  
      apt: 
        name: "{{ packages }}"
        state: present
        update_cache: yes
      vars:
        packages:
        - docker-ce 
        - docker-ce-cli 
        - containerd.io
      notify:
        - docker status

  
  #Redhat family
    - name: Add Docker yum repository
      when: ansible_os_family == "RedHat"
      yum_repository:
        name: Docker
        description: Docker Repository
        file: docker
        baseurl: https://download.docker.com/linux/centos/7/x86_64/stable/
        enabled: yes
        gpgcheck: yes
        gpgkey: https://download.docker.com/linux/centos/gpg
  
    - name: Install docker engine (RHEL/CentOS)
      when: ansible_os_family == "RedHat"
      yum:
        name: "docker-ce-selinux-{{ docker_version }}.*"
        state: present
    
      # - name: Get version of docker 
      #   shell: "docker version"
      #   register: result
      
    # - name: Show version of docker
    #   debug: 
    #     var: result
  
    - name: Get version of docker 
      shell: "docker version --format {% raw %}'{{json .Client.Version}}'{% endraw %}"
        # register: result
      register: result
    
    - name: Show version of docker
      debug: 
        var: result.stdout