简介

从接触到使用Ansible大概有一天的时间，对它的理解也是比较肤浅。我单纯的认为，他可以帮助我们在服务器之间传输文件，同时还可以执行一些shell命令。

安装Ansible

官网地址

sudo apt-get update
sudo apt-get install software-properties-common
sudo apt-add-repository ppa:ansible/ansible
sudo apt-get update
sudo apt-get install ansible

编写docker的playbook yaml文件

---
- hosts: localhost
  remote_user: root
  tasks:
    - name: 创建目录
      file:
        path: "{{ path }}"
        state: directory
        owner: root
        group: root
        mode: 0775
      loop:
        - /opt/tools
        - /etc/docker
      loop_control:
        loop_var: path
    - name: 下载软件包
      get_url: 
        url: https://download.docker.com/linux/static/stable/x86_64/docker-19.03.9.tgz 
        dest: /opt/tools
    - name: 解压软件包
      unarchive:
        src: /opt/tools/docker-19.03.9.tgz
        dest: /usr/local
        copy: no 
        mode: 0755
    - name: COPY 执行文件
      shell:
        chdir: /usr/local
        cmd: cp -rf docker/* /usr/bin
    - name: docker 镜像加速
      shell:
        cmd: |
          cat > /etc/docker/daemon.json << EOF
          {
          "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
          }
          EOF
    - name: service 管理docker
      shell:
        cmd: |
          cat > /lib/systemd/system/docker.service << EOF
          [Unit]
          Description=Docker Application Container Engine
          Documentation=https://docs.docker.com
          After=network-online.target firewalld.service
          Wants=network-online.target

          [Service]
          Type=notify
          ExecStart=/usr/bin/dockerd
          ExecReload=/bin/kill -s HUP $MAINPID
          LimitNOFILE=infinity
          LimitNPROC=infinity
          LimitCORE=infinity
          TimeoutStartSec=0
          Delegate=yes
          KillMode=process
          Restart=on-failure
          StartLimitBurst=3
          StartLimitInterval=60s

          [Install]
          WantedBy=multi-user.target
          EOF
    - name: 启动docker
      systemd: 
        daemon_reload: yes
        name: docker 
        state: restarted 
        enabled: yes
    - name: 删除/usr/local/docker
      file:
        path: /usr/local/docker
        state: absent      
    - name: 查看状态
      shell: docker info
      register: docker 
    - debug: 
        var: docker.stdout_lines

开始安装

# 检查yaml 文件是否存在语法格式错误
ansible-playbook  --check --syntax-check docker.yaml
# 模拟运行 -C 或者 --check
ansible-playbook  -C docker.yaml
# 没有问题的话执行安装
ansible-playbook docker.yaml

检查安装

docker info