Ansible_主机变量和主机组变量的演示

一、主机变量和主机组变量的演示

1、主机变量和主机组变量的基本语法和规则

请访问https://www.cnblogs.com/itwangqiang/p/13592362.html

2、首先在/etc/ansible/下创建清单文件

[root@localhost ~]# cat /etc/ansible/inventory 
[test]
client.example.com

3、实例一:针对特定主机定义变量

1️⃣:首先在/etc/ansible目录下创建host_vars目录(注意:目录名必须是host_vars;且与清单文件所在目录相同)

[root@localhost ansible]# mkdir host_vars
[root@localhost ansible]# ls
ansible.cfg  hosts  host_vars  inventory  playbook.yaml  roles

2️⃣:在host_vars创建与主机同名的文件(如果主机是IP地址,则文件名必须是IP地址)

[root@localhost ansible]# cd host_vars/
[root@localhost host_vars]# vim client.example.com
[root@localhost host_vars]# cat client.example.com 
user: lisi
[root@localhost host_vars]# cat ../inventory 
[test]
client.example.com
   //文件名必须与主机的名字一样

3️⃣:编写playbook文件

[root@localhost ansible]# cat playbook.yaml 
---
- hosts: client.example.com
  tasks:
    - name: create user
      user:
        name: "{{ user }}"
        create_home: no
        state: present

4️⃣:测试是否可执行

[root@localhost ansible]# tree /etc/ansible/
/etc/ansible/
├── ansible.cfg
├── hosts
├── host_vars
│   └── client.example.com
├── inventory
├── playbook.yaml
└── roles

[root@localhost ansible]# ansible-playbook -C playbook.yaml 

PLAY [client.example.com] *************************************************************************************************************************************************

TASK [Gathering Facts] ****************************************************************************************************************************************************
ok: [client.example.com]

TASK [create user] ********************************************************************************************************************************************************
changed: [client.example.com]

PLAY RECAP ****************************************************************************************************************************************************************
client.example.com         : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
   //测试成功

4、实例二:针对主机组定义变量

(接着上面的操作) 

1️⃣:创建主机组清单文件

[root@localhost ansible]# cat inventory 
[example]
client.example.com

2️⃣:在/etc/ansible文件在创建group_vars目录(注意:目录名必须是group_vars;且与清单文件所在目录相同)

[root@localhost ansible]# mkdir group_vars
[root@localhost ansible]# tree /etc/ansible/
/etc/ansible/
├── ansible.cfg
├── group_vars
├── hosts
├── inventory
├── playbook.yaml
└── roles

3️⃣:在group_vars目录下创建与主机组名称相同的文件

[root@localhost ansible]# cd group_vars/
[root@localhost group_vars]# vim example
[root@localhost group_vars]# cat example 
user: lisi

4️⃣:测试是否可执行

[root@localhost ansible]# tree /etc/ansible/
/etc/ansible/
├── ansible.cfg
├── group_vars
│   └── example
├── hosts
├── inventory
├── playbook.yaml
└── roles

[root@localhost ansible]# ansible-playbook -C playbook.yaml 

PLAY [client.example.com] *************************************************************************************************************************************************

TASK [Gathering Facts] ****************************************************************************************************************************************************
ok: [client.example.com]

TASK [create user] ********************************************************************************************************************************************************
changed: [client.example.com]

PLAY RECAP ****************************************************************************************************************************************************************
client.example.com         : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
  //测试成功

  

原文地址:https://www.cnblogs.com/itwangqiang/p/13595447.html