管理变量 （ansible）

·在playbook中定义变量

·创建使用定义的变量任务

1、创建 data-variables 目录 并切换到该目录

vim ~/data-variables

cd ~/data-variables

2、在该目录下添加ansible配置文件ansible.cfg和主机清单文件inventory

vim ansible.cfg

[defaults]
inventory   = inventory
remote_user = devops

[privilege_escalation]
become = true

vim inventory

[webserver]
servera.lab.example.com

3、创建playbook.yml

vim playbook.yml

内容：

--
- name: Deploy and start Aphache web service
  hosts: webserver
  vars:
    web_pkg: httpd
    firewall_pkg: firewalld
    web_service: httpd
    firewall_service: firewalld
    python_pkg: python3-PyMySQL
    rule: http
  tasks:
    - name: Requried packages are install and up to date
      yum:
        name:
          - "{{web_pkg}}"
          - "{{firewall_pkg}}"
          - "{{python_pkg}}"
        state: latest

    - name: The {{web_service}} service is started and enbled
      service:
        name: "{{web_service}}"
        enabled: true
        state: started
    - name: The {{firewall_service}} service is started enabled
      service:
        name: "{{firewall_service}}"
        enabled: true
        state: started
    - name: web content is in place
      copy:
        content: "Example web content"
        dest: /var/www/html/index.html
    - name: The firewall port for {{rule}} is open
      firewalld:
        service: "{{rule}}"
        permanent: true
        immediate: true
        state: enabled
- name: Verify the Apache service
  hosts: localhost
  become: false
  tasks:
    - name: Ensure the webserver is reachable
      uri:
        url: http://servera.lab.example.com
        status_code: 200

4、检查语法(只检查语法是否正确，不检查内容)

ansible-playbook --syntax-check playbook.yml

检查无语法错误会出现如下显示

 5、运行playbook

ansible-playbook playbook.yml

报错：（原因是我们在firewalld service 打错了他所支持的键）

 发现我的service写错了

成功: