Ansible Playbooks 入门

Ansible playbooks 入门
Test Playbooks

    inventory/                  server详细清单目录

        testenv                 具体清单与变量声明文件
    
    roles/                          需要部署的详细任务列表

        testbox/                    项目或APP名称
        
            tasks/                  保存最终task任务乐章
            
                main.yml            具体任务
            
    deploy.yml                  任务入口

详细目录testenv

    [testservers]
    test.example.com
    
    [testservers:vars]
    server_name=test.example.com
    user=root
    output=/root/test.txt

主任务文件mail.yml

- name: Print server name and user to remote testbox
  shell: "echo 'Currently {{ user }} is logging {{ server_name }}' > {{ output }}"

任务入口文件deploy.yml

- hosts: "testservers"
  gather_facts: true
  remote_user: root
  roles:
    - testbox

Ansible常用模块

1. File模块

    在目标主机创建文件或目录，并赋予其系统权限
    - name: create a file
      file: 'path=/root/foo.txt state=touch mode=0755 owner=foo group=foo'
      
2. Copy模块
    
    实现Ansible服务端到目标主机的文件传输
    - name: copy a file
      copy: 'remote_src=no src=roles/testbox/files/foo.sh dest=/root/foo.sh mode=0644 force=yes'
      
3. Stat模块
    
    获取远程文件状态信息
    - name: check if foo.sh exists
      stat: 'path=/root/foo.sh'
      register: script_stat
    
    
4. Debug模块

    打印语句到Ansible执行输出
    - debug: msg=foo.sh exits
      when: script_stat.stat.exists
      
5. Shell模块

    用来执行Linux目标主机命令
    - name: run the script
      shell: "echo 'test' > /root/test.txt"
    
6. Template模块

    实现Ansible服务端到目标主机的jinja2模块传输
    - name: write the nginx config file
      template: src=roles/testbox/templates/nginx.conf.j2 dest=/etc/nginx/nginx.conf
      
      
7. Packaging模块

    调用目标主机系统包管理工具(yum,apt)进行安装
    - name: ensure nginx is at the latest version
      yum: pkg=nginx state=latest
      
    - name: ensure nginx is at the latest version
      apt: pkg=nginx state=latest
      
8. Service模块

    管理目标主机系统服务
    - name: start nginx service
      service: name=nginx state=started