如何在創建 openstack 備份時重復相同的命令？

Question

我獲取了 OpenStack 實例in-use ”卷，並將這些卷 ID 過濾到一個文件中，它必須從中進行備份

shell: openstack volume list | grep 'in-use' | awk '{print $2}' > /home/volumeid   

shell: openstack volume backup create {{ item }}
with_items:
- /home/volumeid

錯誤顯示像

**failed: [controller2] (item=volumeid) => {"ansible_loop_var": "item", "changed": true, "cmd": "openstack volume backup create volumeid", "delta": "0:00:03.682611", "end": "2022-09-26 12:01:59.961613", "item": "volumeid", "msg": "non-zero return code", "rc": 1, "start": "2022-09-26 12:01:56.279002", "stderr": "No volume with a name or ID of 'volumeid' exists.", "stderr_lines": ["No volume with a name or ID of 'volumeid' exists."], "stdout": "", "stdout_lines": []}
failed: [controller1] (item=volumeid) => {"ansible_loop_var": "item", "changed": true, "cmd": "openstack volume backup create volumeid", "delta": "0:00:04.020051", "end": "2022-09-26 12:02:00.280130", "item": "volumeid", "msg": "non-zero return code", "rc": 1, "start": "2022-09-26 12:01:56.260079", "stderr": "No volume with a name or ID of 'volumeid' exists.", "stderr_lines": ["No volume with a name or ID of 'volumeid' exists."], "stdout": "", "stdout_lines": []}**

有人可以說如何在 ansible 劇本中從該文件（具有卷 ID）創建卷備份嗎？

Answer 1

目前，您只為with_items,即/home/volumeid ，這意味着您的循環將只針對文件名而不是其內容迭代一次。

如果您在 localhost 或遠程主機上的slurp模塊上，則需要使用file查找。 例子：

對於localhost ：

- name: Show the volume id from the file
  debug:
    msg: "{{ item }}"
  loop: "{{ lookup('file', '/home/volumeid').splitlines() }}"

對於遠程主機：

  - name: Alternate if the file is on remote host
    ansible.builtin.slurp:
      src: /home/volumeid
    register: vol_data

  - name: Show the volume id from the file
    debug:
      msg: "{{ item }}"
    loop: "{{ (vol_data['content'] | b64decode).splitlines() }}"

Answer 2

只需一行 shell 命令：

openstack volume list --status in-use -c ID -f value | xargs -n1 openstack volume backup create

One advice, don't use the hardcode command like this grep 'in-use' or awk '{print $2}' , openstack has it's optional arguments and output formatters , check it by openstack command [sub command] -h .