修改檔案–不同群組不同內容

1. 修改 shelli1.yml 腳本成 shell2.yml，dev, test, prod 群組主機的 /etc/issue，寫入字串不同。

   ceuser@deyu:~/ansible_pb$ vim shell2.yml 
   ceuser@deyu:~/ansible_pb$ cat shell2.yml
   ---
   - hosts: all
     tasks:
       - ansible.builtin.shell: 
           echo 'Development {{inventory_hostname}}' > /etc/issue
         when: '"dev" in group_names'
       - ansible.builtin.shell: 
           echo 'Test {{inventory_hostname}}' > /etc/issue
         when: '"test" in group_names'
       - ansible.builtin.shell: 
           echo 'Production {{inventory_hostname}}' > /etc/issue
         when: '"prod" in group_names'
   

2. ansible-playbook 執行腳本 shell2.yml。

   ceuser@deyu:~/ansible_pb$ ansible-playbook shell2.yml 
   
   PLAY [all] *********************************************************************
   
   TASK [Gathering Facts] *********************************************************
   ok: [kvm14]
   ok: [kvm15]
   ok: [kvm11]
   ok: [kvm12]
   ok: [kvm13]
   
   TASK [shell] *******************************************************************
   skipping: [kvm12]
   skipping: [kvm15]
   skipping: [kvm13]
   skipping: [kvm14]
   changed: [kvm11]
   
   TASK [shell] *******************************************************************
   skipping: [kvm11]
   skipping: [kvm15]
   skipping: [kvm13]
   skipping: [kvm14]
   changed: [kvm12]
   
   TASK [shell] *******************************************************************
   skipping: [kvm11]
   skipping: [kvm12]
   skipping: [kvm15]
   changed: [kvm13]
   changed: [kvm14]
   
   PLAY RECAP *********************************************************************
   kvm11 : ok=2 changed=1  unreachable=0  failed=0  skipped=0  rescued=0  ignored=0
   kvm12 : ok=2 changed=1  unreachable=0  failed=0  skipped=0  rescued=0  ignored=0
   kvm13 : ok=2 changed=1  unreachable=0  failed=0  skipped=0  rescued=0  ignored=0
   kvm14 : ok=2 changed=1  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, test, prod 等主機的 /etc/issue 檔案內容，符合要求。

   ceuser@deyu:~/ansible_pb$ ansible all -m shell -a "cat /etc/issue"
   kvm15 | CHANGED | rc=0 >>
   \S
   Kernel \r on an \m
   kvm12 | CHANGED | rc=0 >>
   Test kvm12
   kvm14 | CHANGED | rc=0 >>
   Production kvm14
   kvm13 | CHANGED | rc=0 >>
   Production kvm13
   kvm11 | CHANGED | rc=0 >>
   Development kvm11