playbook变量（五）

一、playbook变量
变量名：字母数字和下划线

二、变量来源

1.ansible 主机 -m setup|less所有主机都可以调用

#过滤-a 'filter=*address*'

1.1例子创建一个hostname 的log文件

ansible date -m setup -a 'filter=ansible_fqdn*'

[root@linux-node1 ansible]# cat var.yaml 
---
- hosts: date
  remote_user: root

  tasks:
    - name: create log file
      file: name=/data/{{ ansible_fqdn }}.log state=touch mode=600 owner=zjy

  2. 在/etc/ansible/hosts

 2.1 在host配置文件定义http_port变量

[root@linux-node1 ansible]# cat hostname.yaml 
---
- hosts: date
  remote_user: root

  tasks:
    - name: set hostname
      hostname: name=www.{{http_port}}.123

2.2为组设置固定格式

[root@linux-node1 ansible]# cat hostname1.yaml 
---
- hosts: date
  remote_user: root

  tasks:
    - name: set hostname
      hostname: name={{nodename}}.{{http_port}}.{{dominname}}

3、通过命令行指定变量、优先级最高

[root@linux-node1 ansible]# cat app.yaml 
---
- hosts: date
  remote_user: root

  tasks:
    - name: install package
      yum: name={{ pkname }}
    - name: start service
      service: name={{ pkname }} state=started enabled=yes

ansible-playbook -e 'pkname=vsftpd'  app.yaml

 

 3.1定义多个变量

[root@linux-node1 ansible]# cat app1.yaml 
---
- hosts: date
  remote_user: root

  tasks:
    - name: install package
      yum: name={{ pkname1 }}
    - name: install package
      yum: name={{ pkname2 }}

4、 在playbook中定义
vars:
- var1: value1
- var2: value2

[root@linux-node1 ansible]# cat app2.yaml
---
- hosts: date
  remote_user: root
  vars:
    - pkname1: httpd
    - pkname2: vsftpd

  tasks:
    - name: install package
      yum: name={{ pkname1 }}
    - name: install package
      yum: name={{ pkname2 }}

 5、定义变量文件

[root@linux-node1 ansible]# cat vars.yaml 
var1: httpd
var2: nginx

#playbook
[root@linux-node1 ansible]# cat testvar.yaml 
---
- hosts: date
  remote_user: root
  vars_files:
    - vars.yaml

  tasks:
    - name: install package
      yum: name={{ var1 }}
    - name: create file
      file: name=/data/{{ var2 }}.log state=touch

ansible-playbook  testvar.yaml