實例–rescue

1. 將 blklvfs1.yml 腳本的 hosts 改為 test，並存成 blklvfs2.yml。

   [deyu1@kvm19 ansible]$ vim blklvfs2.yml
   [deyu1@kvm19 ansible]$ grep hosts blklvfs2.yml
   - hosts: test
   

2. ansible-playbook 執行 lvfs2.yml 腳本，因 kvm12 的 vg 不足 200M，所以無法新增，所以執行 rescue 任務，列印客製化訊息 "Could not create logical volume of that size"，並改新增 100M 的 lv。

   [deyu1@kvm19 ansible]$ ansible-playbook blklvfs2.yml
   
   PLAY [test] *********************************************************************
   
   TASK [Gathering Facts] **********************************************************
   ok: [kvm12]
   
   TASK [Create a logical volume of 200m] ******************************************
   fatal: [kvm12]: FAILED! => {"changed": false, "err": "  Volume group \"fieldwork\" has insufficient free space (37 extents): 50 required.\n", "msg": "Creating logical volume 'test' failed", "rc": 5}
   
   TASK [debug] ********************************************************************
   ok: [kvm12] => {
       "msg": "Could not create logical volume of that size"
   }
   
   TASK [Create a logical volume of 100m] ******************************************
   changed: [kvm12]
   
   TASK [Create a ext4] ************************************************************
   changed: [kvm12]
   
   PLAY RECAP **********************************************************************
   kvm12 : ok=4  changed=2  unreachable=0  failed=0  skipped=0  rescued=1  ignored=0
   

3. 查看 kvm11 fieldwork VG 內有一名為 test 的 LV，大小為 200M，且檔案格式為 ext4。

   [deyu1@kvm19 ansible]$ ansible test -m shell -a "lvs"
   kvm12 | CHANGED | rc=0 >>
     LV   VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
     test fieldwork -wi-a----- 100.00m
     root vg_kvm12  -wi-ao----   3.32g
     swap vg_kvm12  -wi-ao----  96.00m
   

4. /dev/fieldwork/test 檔案格式為 ext4。

   [deyu1@kvm19 ansible]$ ansible test -m shell -a "lsblk -f /dev/fieldwork/test"
   kvm12 | CHANGED | rc=0 >>
   NAME           FSTYPE FSVER LABEL UUID            FSAVAIL FSUSE% MOUNTPOINTS
   fieldwork-test ext4   1.0         1e8b5f3d-fbe9-4b1f-9d5c-18c33b15a422