ansible剧本的控制结构
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
---
- name: Create lv
hosts: all
tasks:
- name: Check vg
shell: vgdisplay research
register: v_result
ignore_errors: yes
- name: Display
debug:
msg: "Volumn group research does not exist"
when: v_result.rc !=0
failed_when: v_result.rc !=0
- block:
- name: Create 3G lv
lvol:
vg: research
lv: data
size: 3G
rescue:
- name: Msg
debug:
msg: "Could not create logical volume of that size"
failed_when: true
ignore_errors: yes
- name: 2G
lvol:
vg: research
lv: data
size: 2G
- name: Filesystem
filesystem:
fstype: vfat
dev: /dev/research/data
force: yes
always:
- name: Display
debug:
msg: "TEST TEST TEST"
$ ansible all -m shell-a'fsck.vfat/dev/research/data'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'
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