*lvg 模組

1. lvg 模組可管理邏輯卷冊組 (volume group)，查看 lvg 模組的範例。

   [deyu1@kvm19 ansible]$ ansible-doc lvg | grep ^EX -A6
   EXAMPLES:
   
   - name: Create a volume group on top of /dev/sda1 with physical extent size = 32MB
     lvg:
       vg: vg.services
       pvs: /dev/sda1
       pesize: 32
   

2. partvg.yml 腳本新增產生 vg fieldwork 的任務。

   [deyu1@kvm19 ansible]$ vim partvg.yml
   [deyu1@kvm19 ansible]$ cat partvg.yml
   ---
   - hosts: dev
     tasks:
     - name: Create a new primary partition for LVM
       parted:
         device: /dev/vda
         number: 3
         flags: [ lvm ]
         state: present
         part_start: 3994624KiB
   
     - name: Create VG
       lvg:
         vg: fieldwork
         pvs: /dev/vda3
         pesize: 2
   

3. ansible-playbook 執行 partvg.yml 腳本，成功產生 fieldwork 邏輯卷冊組，其中警告訊息 pesize 欄位格式是字串，建議數字 2 用引號括起來。

   [deyu1@kvm19 ansible]$ ansible-playbook partvg.yml 
   
   PLAY [dev] *********************************************************************
   
   TASK [Gathering Facts] *********************************************************
   ok: [kvm11]
   
   TASK [Create a new primary partition for LVM] **********************************
   ok: [kvm11]
   
   TASK [Create VG] ***************************************************************
    [WARNING]: The value 2 (type int) in a string field was converted to '2' (type
   string). If this does not look like what you expect, quote the entire value to
   ensure it does not change.
   
   changed: [kvm11]
   
   PLAY RECAP *********************************************************************
   kvm11 : ok=3 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0