實例–rescue

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

   ceuser@deyu:~/ansible_pb$ vi blklvfs2.yml
   ceuser@deyu:~/ansible_pb$ 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。

   ceuser@deyu:~/ansible_pb$ 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 [ansible.builtin.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。

   ceuser@deyu:~/ansible_pb$ 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。

   ceuser@deyu:~/ansible_pb$ 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         3a214e0d-5589-48dd-93e6-084cce3770f1