Dockerを入れるプレイブック。docker-compose とか最新バージョンを取れるようにした。

plaubook-install-docker.yml

- hosts: all
  become: yes
  tags: docker
  tasks:
    - name: docker install
      block:
        - name: install docker
          yum: name=docker
        - name: enable service (upstart)
          service: name=docker state=started enabled=yes
          when: ansible_service_mgr == 'upstart'
        - name: enable service (systemd)
          systemd: name=docker state=started enabled=yes
          when: ansible_service_mgr == 'systemd'
    - name: install doccker-compose
      block:
        - name: install docker-compose (stat)
          stat:
            path: /usr/local/bin/docker-compose
          register: docker_compose_stat
        - when: not docker_compose_stat.stat.exists
          block:
            - name: install docker-compose (define asset name)
              set_fact:
                docker_compose_name: docker-compose-Linux-x86_64
            - name: install docker-compose (detect latest)
              uri:
                url: https://api.github.com/repos/docker/compose/releases/latest
                return_content: yes
              register: docker_compose_latest
            - name: install docker-compose (get sha256)
              uri:
                url: "https://github.com/docker/compose/releases/download/{{docker_compose_latest.json.name}}/{{docker_compose_name}}.sha256"
                return_content: yes
              register: docker_compose_sha256
            - name: install docker-compose (download)
              get_url:
                url: "https://github.com/docker/compose/releases/download/{{docker_compose_latest.json.name}}/{{docker_compose_name}}"
                checksum: "sha256:{{docker_compose_sha256.content|regex_replace(' .*','')}}"
                dest: /usr/local/bin/docker-compose
                mode: 0755
    - name: install doccker-machine
      block:
        - name: install docker-machine (stat)
          stat:
            path: /usr/local/bin/docker-machine
          register: docker_machine_stat
        - when: not docker_machine_stat.stat.exists
          block:
            - name: install docker-machine (define asset name)
              set_fact:
                docker_machine_name: docker-machine-Linux-x86_64
            - name: install docker-machine (detect latest)
              uri:
                url: https://api.github.com/repos/docker/machine/releases/latest
                return_content: yes
              register: docker_machine_latest
            - name: install docker-machine (download)
              get_url:
                url: "https://github.com/docker/machine/releases/download/{{docker_machine_latest.json.name}}/{{docker_machine_name}}"
                dest: /usr/local/bin/docker-machine
                mode: 0755

uri モジュールで return_content: yes にすれば大抵のAPIをうまく扱えそうだな。Content-Type に応じて勝手にJSONのパースとかもしてくれるので便利だった。

docker-compose は .sha256 あるのに、docker-machine は無いんだね。