ansible剧本的控制结构

botang

when: 和debug中的var 都要直接引用变量名，其他情况下都是"{{ }}"

ignore_errors： 避免一个老鼠屎坏掉一群机器

failed_when: 指鹿为马/信口雌黄

block...rescue: 应急预案

jinjia2模板中的变量值不要加双引号

1. 
   
2. ---
   
3. - name: Create lv
   
4.   hosts: all
   
5.   tasks:
   
6.   - name: Check vg
   
7.     shell: vgdisplay research
   
8.     register: v_result
   
9.     ignore_errors: yes
   
10. 
    
11.   - name: Display
    
12.     debug:
    
13.       msg: "Volumn group research does not exist"
    
14.     when: v_result.rc !=0
    
15.     failed_when: v_result.rc !=0
    
16. 
    
17.   - block:
    
18.     - name: Create 3G lv
    
19.       lvol:
    
20.         vg: research
    
21.         lv: data
    
22.         size: 3G
    
23. 
    
24.     rescue:
    
25.     - name: Msg
    
26.       debug:
    
27.         msg: "Could not create logical volume of that size"
    
28.       failed_when: true
    
29.       ignore_errors: yes
    
30. 
    
31.     - name: 2G
    
32.       lvol:
    
33.         vg: research
    
34.         lv: data
    
35.         size: 2G
    
36. 
    
37.     - name: Filesystem
    
38.       filesystem:
    
39.         fstype: vfat
    
40.         dev: /dev/research/data
    
41.         force: yes
    
42. 
    
43.     always:
    
44.     - name: Display
    
45.       debug:
    
46.         msg: "TEST TEST TEST"
    

复制代码

1. [student@workstation ansible]$ ansible all -m shell  -a  'fsck.vfat  /dev/research/data'

复制代码

serverb | CHANGED | rc=0 >>
fsck.fat 4.1 (2017-01-24)
/dev/research/data: 0 files, 1/523262 clusters

serverc | FAILED | rc=6 >>
fsck.fat 4.1 (2017-01-24)open: No such file or directorynon-zero return code

serverd | FAILED | rc=6 >>
fsck.fat 4.1 (2017-01-24)open: No such file or directorynon-zero return code

servera | CHANGED | rc=0 >>
fsck.fat 4.1 (2017-01-24)
/dev/research/data: 0 files, 1/523262 clusters


附件：
xfs: ansible all -m shell  -a  'xfs_info  /dev/research/data'
ext3/4: ansible all -m shell -a 'tune2fs -l /dev/research/data'