An ansible playbook for setting-up Docker under Ubuntu. #docker #ansible

setup-docker-on-ubuntu.yml

# Run with: ansible-playbook -b

---

 - hosts: all
 
   pre_tasks:

   - command: lsb_release -is
     register: lsb_release_distributor_result
   
   - assert:
       that:
       - (lsb_release_distributor_result.stdout == 'Ubuntu')
   
   - command: lsb_release -cs
     register: lsb_release_codename_result

   - set_fact:
       lsb_release_codename: '{{lsb_release_codename_result.stdout}}'
   
   vars:
     docker_compose_version: '1.25.4'

   tasks:

   - name: Update APT index
     apt: update_cache=yes

   - name: Install basic APT packages
     apt: pkg={{item}} state=latest
     with_items: 
     - 'curl'
     - 'apt-transport-https'
     - 'ca-certificates'
     - 'gnupg-agent'
     - 'software-properties-common'

   - name: Add APT key for Docker repositories
     apt_key:
       url: 'https://download.docker.com/linux/ubuntu/gpg'
       state: present

   - name: Add APT repositories for Docker
     apt_repository:
       repo: 'deb https://download.docker.com/linux/ubuntu {{lsb_release_codename}} stable'
       state: present

   - name: Update APT index
     apt: update_cache=yes
   
   - name: Install docker
     apt: pkg={{item}} state=latest
     with_items:
     - 'docker-ce' 
     - 'docker-ce-cli' 
     - 'containerd.io'
  
   - name: Download docker-compose binary
     get_url:
       url: 'https://github.com/docker/compose/releases/download/{{docker_compose_version}}/docker-compose-Linux-{{ansible_architecture}}'
       dest: /usr/local/bin/docker-compose 
       mode: 0774
       owner: root
       group: docker
     when: docker_compose_version is defined

   #- debug: var=ansible_env.SUDO_USER
   
   - name: Add user to docker group
     user:
       name: '{{ansible_env.SUDO_USER}}'
       groups: docker
       append: yes
     when: ansible_env.SUDO_USER != 'root'

   - name: Update kernel boot parameters to enable cgroups on memory
     lineinfile:
       dest: /etc/default/grub
       regexp: '^GRUB_CMDLINE_LINUX_DEFAULT='
       line: 'GRUB_CMDLINE_LINUX_DEFAULT="cgroup_enable=memory swapaccount=1"'  
       mode: 0644
       backup: yes

   - name: Update Grub
     command: update-grub