修改檔案–單一群組

1. 撰寫 shell1.yml 腳本，對 dev 主機的 /etc/issue，修改成特定的字串。

   [deyu1@kvm19 ansible]$ vim shell1.yml
   [deyu1@kvm19 ansible]$ cat shell1.yml 
   ---
   - hosts: all
     tasks:
       - shell: 
           "echo 'Development {{inventory_hostname}}' > /etc/issue"
         when: '"dev" in group_names'
   

2. ansible-playbook 執行腳本 shell1.yml。

   [deyu1@kvm19 ansible]$ ansible-playbook shell1.yml 
   
   PLAY [all] *********************************************************************
   
   TASK [Gathering Facts] *********************************************************
   ok: [kvm15]
   ok: [kvm11]
   ok: [kvm14]
   ok: [kvm13]
   ok: [kvm12]
   
   TASK [shell] *******************************************************************
   skipping: [kvm12]
   skipping: [kvm15]
   skipping: [kvm13]
   skipping: [kvm14]
   changed: [kvm11]
   
   PLAY RECAP *********************************************************************
   kvm11 : ok=2 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
   kvm12 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
   kvm13 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
   kvm14 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
   kvm15 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
   

3. ansible 使用 shell 模組查看主機 dev 的 /etc/issue 檔案內容，符合要求。

   [deyu1@kvm19 ansible]$ ansible dev -m shell -a "cat /etc/issue"
   kvm11 | CHANGED | rc=0 >>
   Development kvm11