Ansible Playbook으로 Docker 설치

RedHat 계열 리눅스에서 Ansible로 도커 설치하는 방법

Ansible 설정

install_docker.yaml

10대 이상의 리눅스에 도커를 설치하는 playbook

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- name: Install Docker CE on web/was hosts
  hosts: webwas
  become: true
  gather_facts: yes

  vars:
    conflict_pkgs:
      - docker.io        
      - docker-doc
      - docker-compose
      - docker-compose-v2
      - podman-docker
      - containerd
      - runc

    docker_pkgs:
      - docker-ce
      - docker-ce-cli
      - containerd.io
      - docker-buildx-plugin
      - docker-compose-plugin

  tasks:
    - name: 01. Remove conflicting packages (ignore if not present)
      package:
        name: "{{ conflict_pkgs }}"
        state: absent

    - name: 02. Install prerequisites
      package:
        name: yum-utils
        state: present
      when: ansible_os_family == "RedHat"

    - name: 03. Add Docker CE yum repository (official)
      yum_repository:
        name: docker-ce-stable
        description: Docker CE Stable - $basearch
        baseurl: "https://download.docker.com/linux/centos/$releasever/$basearch/stable"
        gpgcheck: yes
        gpgkey: https://download.docker.com/linux/centos/gpg
        enabled: yes
      when: ansible_os_family == "RedHat"

    - name: 04. Install Docker CE packages
      package:
        name: "{{ docker_pkgs }}"
        state: present

    - name: 05. Enable and start Docker
      service:
        name: docker
        state: started
        enabled: yes

task01: 기존 충돌 패키지 제거
task02: 필수 패키지 설치
task03: Docker CE 패키지 리포지토리 추가
- OS 버전에 맞는 리포지토리 자동 설정
task04: 도커 설치
task05: 도커 서비스 시작 및 자동 실행