ansible变量引用

1. 在/etc/ansible/hosts默认文件中定义变量
   [test]
   192.168.163.130
   #[test:vars]
   #key=ansible
   或者
   192.168.163.130 key=ansible
   [test]
   192.168.163.130
2. 编写var.yaml文件

• hosts: test
  gather_facts: False
  tasks:
  - name: display Host Variable from hostfile
  debug: msg=“The { { inventory_hostname }} Vaule is { { key }}”

ansible-playbook var.yaml #检查yaml文件语法


3. 在/etc/ansible下新建目录host_vars
写入变量文件名要以主机ip或者绑定的host命名
cat host_vars/192.168.163.130
key: 192.168.163.130
ansible-playbook var.yaml

4. 针对主机组设置变量
在/etc/ansible下新建group_vars
变量文件以主机组命名
cat group_vars/test && rm -rf host_vars
key: abcdefg

5. 手动传入变量，可传入多个变量
ansible-playbook var.yaml -e “key=JSON”

6.支持文件传入变量
变量文件支持YAML和JSON两种格式
cat vars.yaml
key: KEY-YAML
cat var.json
{“key”: “KEY_JSON”}
ansible-playbook var.yaml -e “@var.json”
7. 在playbook文件内使用vars

• hosts: test
  gather_facts: False
  vars:
  key: Ansible-KEY
  tasks:
  - name: display Host Variable from hostfile
  debug: msg=“The { { inventory_hostname }} Vaule is { { key }}”

8. 在playbook文件使用vars_files

• hosts: test
  gather_facts: False
  vars_files:
  - vars.yaml 或者group_vars/test
  tasks:
  - name: display Host Variable from hostfile
  debug: msg=“The { { inventory_hostname }} Vaule is { { key }}”

9. 使用register内的变量
   cat var.yaml

• hosts: test
  gather_facts: False
  tasks:
  - name: register variable
  shell: hostname
  register: aaaaa　　#输出结果为python字典
  - name: display Host Variable from hostfile
  debug: msg=“The { { inventory_hostname }} Vaule is { { aaaaa }}” #{aaaaa[‘stdout’]}具体输出某个字段的值
  

10. vars_prompt传入参数
    cat var.yaml

• hosts: test
  gather_facts: False
  vars_prompt:
  - name: “aaa”
  prompt: “please input aaa value”
  default: ‘123’
  private: no
  - name: “bbb”
  prompt: “please input bbb value”
  default: ‘456’
  private: yes
  tasks:
  - name: display aaa value
  debug: msg=“aaa value is { { aaa }}”
  - name: display bbb value
  debug: msg=“bbb value is { { bbb }}”