ansible 学习记录（五） -- playbook 学习

Debug 模块使用

• ansible doc – debug module

• playbook/helloworld.yml

---

- name: Hello World
  hosts: localhost

  tasks:
    - name: Hello World
      debug:
        msg: "Hello World"

• ansible control host

[root@master ~]# ansible-playbook /home/ansible-study/playbook/helloworld.yml

• 增加 verbosity 参数

---

- name: Hello World
  hosts: localhost

  tasks:
    - name: Hello World
      debug:
        msg: "Hello World"
        verbosity: 3

[root@master ~]# ansible-playbook /home/ansible-study/playbook/helloworld.yml

• 开启 Debug 模式运行 – -vvv

[root@master ~]# ansible-playbook /home/ansible-study/playbook/helloworld.yml -vvv

playbook 中使用 variables

变量优先级：越排在后面，优先级越高

• Playbook 编写

---

- name: Hello World
  hosts: localhost

  vars:
    greetings: "hello from vars"

  tasks:
    - name: Hello World debug
      debug:
        msg: "{{greetings}}"

• 执行 playbook

[root@master ~]# ansible-playbook /home/ansible-study/variables/helloworld.yml

---

- name: Hello World
  hosts: localhost

  vars:
    greetings: "hello from playbook vars"
    demo:
      a:
        - a: 1
        - b: 2
      b: test
    
  tasks:
    - name: Hello World debug
      debug:
        msg: "{{demo}}"

[root@master ~]# ansible-playbook /home/ansible-study/variables/helloworld.yml

• 配置文件提取

# vars/helloworld.yml
---

- name: Hello World
  hosts: localhost

  vars:
    greetings: "hello from playbook vars"
   
  vars_files:
    - "./vars_file/demo.yml"
    - "./vars_file/test.yml"
    
  tasks:
    - name: Hello World debug
      debug:
        msg: "{{greetings}}"

# vars/vars_file/demo.yml
greetings: "hello from vars_file -- demo.yml"
# vars/vars_file/test.yml
greetings: "hello from vars_file -- test.yml"