• playbook


    (1)playbook基本用法:安装apache

    playbook语法:注意空格,不能是tab键

    #vim nginx.yml
    
    - hosts: 192.168.1.31
      tasks:
      - name: Install Apache Package
        yum: name=httpd state=latest
    
      - name: Copy Apache Conf
        copy: src=/tmp/httpd.conf dest=/etc/httpd/conf/httpd.conf
        notify: Restart Apache Service
    
      - name: Start Apache
        service: name=httpd state=started enabled=yes
    
      handlers:
      - name: Restart Apache Service
        service: name=httpd state=restarted
    
    说明:
    目标主机是:192.168.1.31
    安装httpd,把本地/tmp/httpd.conf文件拷贝到目标主机指定目录
    启动httpd和开机启动
    handlers:处理方式(重启httpd)
    notify动作:当copy文件改变的时候,会触发处理方式handlers(重启httpd)
    
    ansible-playbook  nginx.yml --syntax-check        //检测语法
    ansible-playbook  nginx.yml        //执行
    

    (2)role用法

    1)主配置文件:定义主机的角色是nginx

    #vim /root/roles/site.yml
    - hosts: 192.168.1.32
      roles:
      - nginx
    

    2)定义nginx的首页文件,这个目录可以放置一些不改变的文件

    #vim /root/roles/nginx/files/index.html 
    Hello World
    

    3)定义任务文件: yum安装epel源和nginx包,复制配置文件和首页文件(不需要加目录结构),当配置文件修改触发动作,服务启动和开机启动

    # cat /root/roles/nginx/tasks/main.yml 
    - name: Install Nginx Package
      yum: name={{ item }} state=latest
      with_items:
      - epel-release
      - nginx 
    - name: Copy nginx.conf Template
      template: src=nginx.conf.j2 dest=/etc/nginx/nginx.conf
      notify: restart nginx
    - name: Copy index.html
      copy: src=index.html dest=/usr/share/nginx/html/index.html
    - name: make sure nginx service running 
      service: name=nginx state=started enabled=yes
    

    4)定义默认配置文件:注意这里配置文件使用了变量,注意这里其中一个变量 ansible_processor_cores 是使用setup模块收集自动引用的

    # grep "{{" /root/roles/nginx/templates/nginx.conf.j2 
    worker_processes {{ ansible_processor_cores }};
        worker_connections {{ worker_connections }};
    

    5)定义变量:引用配置文件中的变量

    # cat nginx/vars/main.yml 
    worker_connections: 10240
    

    6)定义动作:当模板中的配置文件变动会触发重启nginx动作

    # cat /root/roles/nginx/handlers/main.yml 
    - name: restart nginx
      service: name=nginx state=restarted
    
    ansible-playbook  site.yml --syntax-check        //检测语法
    ansible-playbook  site.yml        //执行
    
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  • 原文地址:https://www.cnblogs.com/lovelinux199075/p/9014709.html
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