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如何期望Ansible任務失敗？

2022-01-22 16:48:49 軟體設計

我的一項 Ansible 任務不斷失敗，我遇到了問題。但是，問題不在于任務失敗（我希望它失敗），而是我想要做的是即使失敗也將其顯示為成功。

我之所以要這樣做是因為該任務正在使用 WinRM 在 Windows 服務器上運行 Powershell 腳本，而 Powershell 腳本正在為 WinRM 啟用證書身份驗證。這會導致 WinRM 與服務器的連接在 Windows 服務器上重置 WinRM 服務時中止。因此，當應用對 WinRM 的這些更改時，任務將失敗。

任務失敗的事實很好，因為 playbook 中的下一個任務是檢查 WinRM 的更改是否已成功應用。因此，任務使用引數“ignore_errors: yes”運行。但是，我想將任務顯示為成功，即使它失敗了。我嘗試設定引數“failed_when：false”（任務應該總是成功）和“no_log：true”，但這似乎對任務沒有任何影響，它仍然給出以下輸出：

fatal: [X.X.X.X]: FAILED! => {"censored": "the output has been hidden due to the fact that 'no_log: true' was specified for this result"}

完整的任務如下所示：

- name: Activate certificate authentication for WinRM on server
  ansible.windows.win_powershell:
    script: |
      {{ remote_working_dir }}\ConfigureWinRMCertificateAuthentication.ps1
  ignore_errors: yes
  failed_when: false
  no_log: true

在執行此任務之前，將 Powershell 腳本“ConfigureWinRMCertificateAuthentication.ps1”上傳到 {{ remote_working_dir }} 中的服務器。Powershell 腳本簡單地配置 WinRM 服務使用的 CA 證書、用戶證書和服務器證書，使用新證書創建一個新的 WSMan 實體，然后為 WinRM 啟用基于證書的身份驗證。

在沒有“no_log: true”的情況下運行任務時的錯誤是：

requests.exceptions.ConnectionError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))
fatal: [172.27.25.37]: FAILED! => {
    "msg": "Unexpected failure during module execution.",
    "stdout": ""

TL; DR：我想問的問題是，有沒有辦法將任務執行期間連接中止的任務顯示為成功？

編輯：

添加任務注冊結果的輸出：

    ok: [X.X.X.X] => {
    "changed": false,
    "msg": {
        "exception": "Traceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nOSError: (104, 'ECONNRESET')\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 439, in send\n    resp = conn.urlopen(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 719, in urlopen\n    retries = retries.increment(\n  File \"/usr/lib/python3/dist-packages/urllib3/util/retry.py\", line 400, in increment\n    raise six.reraise(type(error), error, _stacktrace)\n  File \"/usr/lib/python3/dist-packages/six.py\", line 702, in reraise\n    raise value.with_traceback(tb)\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 146, in run\n    res = self._execute()\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 645, in _execute\n    result = self._handler.run(task_vars=variables)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py\", line 46, in run\n    result = merge_hash(result, self._execute_module(task_vars=task_vars, wrap_async=wrap_async))\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 923, in _execute_module\n    res = self._low_level_execute_command(cmd, sudoable=sudoable, in_data=in_data)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 1071, in _low_level_execute_command\n    rc, stdout, stderr = self._connection.exec_command(cmd, in_data=in_data, sudoable=sudoable)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 548, in exec_command\n    result = self._winrm_exec(cmd_parts[0], cmd_parts[1:], from_exec=True, stdin_iterator=stdin_iterator)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 475, in _winrm_exec\n    resptuple = self.protocol.get_command_output(self.shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 449, in get_command_output\n    self._raw_get_command_output(shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 468, in _raw_get_command_output\n    res = self.send_message(xmltodict.unparse(req))\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 243, in send_message\n    resp = self.transport.send_message(message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 323, in send_message\n    response = self._send_message_request(prepared_request, message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 328, in _send_message_request\n    response = self.session.send(prepared_request, timeout=self.read_timeout_sec)\n  File \"/usr/lib/python3/dist-packages/requests/sessions.py\", line 646, in send\n    r = adapter.send(request, **kwargs)\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 498, in send\n    raise ConnectionError(err, request=request)\nrequests.exceptions.ConnectionError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n",
        "failed": true,
        "msg": "Unexpected failure during module execution.",
        "stdout": ""
    }
}

編輯2：

使用以下配置運行任務：

- name: Activate certificate authentication for WinRM on server
  ansible.windows.win_powershell:
    script: |
      {{ remote_working_dir }}\ConfigureWinRMCertificateAuthentication.ps1
  register: test
  ignore_errors: yes
  failed_when: rc != 0
  no_log: true

- name: Dump results
  ansible.builtin.debug:
    msg: "{{ test }}"

產生以下除錯輸出（和失敗的任務）：

   TASK [Dump results] *********************************************************************************************************************************************************************************************************************************************
    ok: [172.27.25.37] => {
        "changed": false,
        "msg": {
            "exception": "Traceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nOSError: (104, 'ECONNRESET')\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 439, in send\n    resp = conn.urlopen(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 719, in urlopen\n    retries = retries.increment(\n  File \"/usr/lib/python3/dist-packages/urllib3/util/retry.py\", line 400, in increment\n    raise six.reraise(type(error), error, _stacktrace)\n  File \"/usr/lib/python3/dist-packages/six.py\", line 702, in reraise\n    raise value.with_traceback(tb)\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 146, in run\n    res = self._execute()\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 645, in _execute\n    result = self._handler.run(task_vars=variables)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py\", line 46, in run\n    result = merge_hash(result, self._execute_module(task_vars=task_vars, wrap_async=wrap_async))\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 923, in _execute_module\n    res = self._low_level_execute_command(cmd, sudoable=sudoable, in_data=in_data)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 1071, in _low_level_execute_command\n    rc, stdout, stderr = self._connection.exec_command(cmd, in_data=in_data, sudoable=sudoable)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 548, in exec_command\n    result = self._winrm_exec(cmd_parts[0], cmd_parts[1:], from_exec=True, stdin_iterator=stdin_iterator)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 475, in _winrm_exec\n    resptuple = self.protocol.get_command_output(self.shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 449, in get_command_output\n    self._raw_get_command_output(shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 468, in _raw_get_command_output\n    res = self.send_message(xmltodict.unparse(req))\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 243, in send_message\n    resp = self.transport.send_message(message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 323, in send_message\n    response = self._send_message_request(prepared_request, message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 328, in _send_message_request\n    response = self.session.send(prepared_request, timeout=self.read_timeout_sec)\n  File \"/usr/lib/python3/dist-packages/requests/sessions.py\", line 646, in send\n    r = adapter.send(request, **kwargs)\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 498, in send\n    raise ConnectionError(err, request=request)\nrequests.exceptions.ConnectionError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n",
            "failed": true,
            "msg": "Unexpected failure during module execution.",
            "stdout": ""
        }
    }

然后使用以下配置運行任務：

- name: Activate certificate authentication for WinRM on server
      ansible.windows.win_powershell:
        script: |
          {{ remote_working_dir }}\ConfigureWinRMCertificateAuthentication.ps1
      register: test
      ignore_errors: yes
      failed_when: rc == 0
      no_log: true

    - name: Dump results
      ansible.builtin.debug:
        msg: "{{ test }}"

產生以下除錯輸出（也是失敗的任務）：

TASK [Dump results] *********************************************************************************************************************************************************************************************************************************************
ok: [172.27.25.37] => {
    "changed": false,
    "msg": {
        "exception": "Traceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nOSError: (104, 'ECONNRESET')\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 439, in send\n    resp = conn.urlopen(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 719, in urlopen\n    retries = retries.increment(\n  File \"/usr/lib/python3/dist-packages/urllib3/util/retry.py\", line 400, in increment\n    raise six.reraise(type(error), error, _stacktrace)\n  File \"/usr/lib/python3/dist-packages/six.py\", line 702, in reraise\n    raise value.with_traceback(tb)\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 665, in urlopen\n    httplib_response = self._make_request(\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 421, in _make_request\n    six.raise_from(e, None)\n  File \"<string>\", line 3, in raise_from\n  File \"/usr/lib/python3/dist-packages/urllib3/connectionpool.py\", line 416, in _make_request\n    httplib_response = conn.getresponse()\n  File \"/usr/lib/python3.8/http/client.py\", line 1348, in getresponse\n    response.begin()\n  File \"/usr/lib/python3.8/http/client.py\", line 316, in begin\n    version, status, reason = self._read_status()\n  File \"/usr/lib/python3.8/http/client.py\", line 277, in _read_status\n    line = str(self.fp.readline(_MAXLINE   1), \"iso-8859-1\")\n  File \"/usr/lib/python3.8/socket.py\", line 669, in readinto\n    return self._sock.recv_into(b)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 328, in recv_into\n    return self.recv_into(*args, **kwargs)\n  File \"/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py\", line 318, in recv_into\n    raise SocketError(str(e))\nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 146, in run\n    res = self._execute()\n  File \"/usr/lib/python3/dist-packages/ansible/executor/task_executor.py\", line 645, in _execute\n    result = self._handler.run(task_vars=variables)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py\", line 46, in run\n    result = merge_hash(result, self._execute_module(task_vars=task_vars, wrap_async=wrap_async))\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 923, in _execute_module\n    res = self._low_level_execute_command(cmd, sudoable=sudoable, in_data=in_data)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/action/__init__.py\", line 1071, in _low_level_execute_command\n    rc, stdout, stderr = self._connection.exec_command(cmd, in_data=in_data, sudoable=sudoable)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 548, in exec_command\n    result = self._winrm_exec(cmd_parts[0], cmd_parts[1:], from_exec=True, stdin_iterator=stdin_iterator)\n  File \"/usr/lib/python3/dist-packages/ansible/plugins/connection/winrm.py\", line 475, in _winrm_exec\n    resptuple = self.protocol.get_command_output(self.shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 449, in get_command_output\n    self._raw_get_command_output(shell_id, command_id)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 468, in _raw_get_command_output\n    res = self.send_message(xmltodict.unparse(req))\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/protocol.py\", line 243, in send_message\n    resp = self.transport.send_message(message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 323, in send_message\n    response = self._send_message_request(prepared_request, message)\n  File \"/usr/local/lib/python3.8/dist-packages/winrm/transport.py\", line 328, in _send_message_request\n    response = self.session.send(prepared_request, timeout=self.read_timeout_sec)\n  File \"/usr/lib/python3/dist-packages/requests/sessions.py\", line 646, in send\n    r = adapter.send(request, **kwargs)\n  File \"/usr/lib/python3/dist-packages/requests/adapters.py\", line 498, in send\n    raise ConnectionError(err, request=request)\nrequests.exceptions.ConnectionError: ('Connection aborted.', OSError(\"(104, 'ECONNRESET')\"))\n",
        "failed": true,
        "msg": "Unexpected failure during module execution.",
        "stdout": ""
    }
}

因此，更改failed_when引數（無論我將其設定為什么）似乎對任務的結果沒有影響。

uj5u.com熱心網友回復：

執行中斷連接的任務的正常解決方法是在即發即async棄模式下使用。reboot在執行該操作之前，此模式曾經大量用于服務器重新啟動。

- name: Activate certificate authentication for WinRM on server
  ansible.windows.win_powershell:
    script: |
      Start-Sleep -s 2
      {{ remote_working_dir }}\ConfigureWinRMCertificateAuthentication.ps1
  async: 60
  poll: 0

在腳本開頭添加的 sleep 確保在連接中斷之前有時間將初始異步狀態回傳給 Ansible 控制器；async: 60以 60 秒的超時時間異步運行任務，并poll: 0告訴 Ansible 立即繼續執行下一個任務。

這通常后面跟著類似的東西

- name: Wait for the server to come back
  wait_for_connection:
    delay: 30
    timeout: 300

優雅地重試連接，直到服務器再次可訪問。

uj5u.com熱心網友回復：

使用暫存器和“ .failed”。這是我自己的一個案例，我正在測驗 Kubernetes 部署未能按預期部署：

- name: Test webhook rejects with no label
  kubernetes.core.k8s:
    state: present
    namespace: "{{ webhook_namespace }}"
    definition: "{{ lookup('template', 'roles/gke-setup-tasks/files/nginx-test-webhook-no-label.yaml') | from_yaml }}"
  register: test
  failed_when: not test.failed

所以我宣告如果任務沒有失敗，它就被認為是“失敗的” 。換句話說，如果任務成功（部署部署），那么我認為任務失敗。

要回復評論中的更多查詢，這是另一個示例，您可能會基于 rc 失敗（或回傳代碼——在 Windows 上，我相信這也稱為批處理腳本中的錯誤級別）

我們從一個會失敗的簡單任務開始：

- name: Do something that fails
  shell:
    cmd: /usr/bin/false

這給了我們預期的錯誤：

TASK [appinstalls : Do something that fails] ***********************************
fatal: [localhost]: FAILED! => {"changed": true, "cmd": "/usr/bin/false", "delta": "0:00:00.012978", "end": "2022-01-20 14:45:51.400921", "msg": "non-zero return code", "rc": 1, "start": "2022-01-20 14:45:51.387943", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}

現在讓我們添加一個暫存器并轉儲內容。我們必須添加ignore_errors以便執行繼續

- name: Do something that fails
  shell:
    cmd: /usr/bin/false
  register: test
  ignore_errors: true

- debug:
    msg: "{{test}}"

TASK [appinstalls : Do something that fails] *************************************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": true, "cmd": "/usr/bin/false", "delta": "0:00:00.010801", "end": "2022-01-20 14:48:35.689258", "msg": "non-zero return code", "rc": 1, "start": "2022-01-20 14:48:35.678457", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
...ignoring

TASK [appinstalls : debug] *******************************************************************************************************************************************
ok: [localhost] => {
    "msg": {
        "changed": true,
        "cmd": "/usr/bin/false",
        "delta": "0:00:00.010801",
        "end": "2022-01-20 14:48:35.689258",
        "failed": true,
        "msg": "non-zero return code",
        "rc": 1,
        "start": "2022-01-20 14:48:35.678457",
        "stderr": "",
        "stderr_lines": [],
        "stdout": "",
        "stdout_lines": []
    }
}

現在注意rc這里怎么樣1？讓我們更改任務，以便僅在rcis時才使任務失敗0（即，如果rc，或回傳碼為零，我們認為它是失敗的）。我們還洗掉了ignore_errors現在：

- name: Do something that fails
  shell:
    cmd: /usr/bin/false
  register: test
  failed_when: test.rc == 0

- debug:
    msg: "{{test}}"

現在，當我們運行它時，它不會失敗，即使任務中的命令實際上失敗了。

TASK [appinstalls : Do something that fails] *************************************************************************************************************************
changed: [localhost]

TASK [appinstalls : debug] *******************************************************************************************************************************************
ok: [localhost] => {
    "msg": {
        "changed": true,
        "cmd": "/usr/bin/false",
        "delta": "0:00:00.006484",
        "end": "2022-01-20 14:52:01.010044",
        "failed": false,
        "failed_when_result": false,
        "msg": "non-zero return code",
        "rc": 1,
        "start": "2022-01-20 14:52:01.003560",
        "stderr": "",
        "stderr_lines": [],
        "stdout": "",
        "stdout_lines": []
    }
}

那么如果我們做同樣的事情，但是使用一個實際成功的命令會發生什么：

- name: Do something that succeeds
  shell:
    cmd: echo "This is a success"
  register: test
  failed_when: test.rc == 0

- debug:
    msg: "{{test}}"


TASK [appinstalls : Do something that succeeds] **********************************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": true, "cmd": "echo \"This is a success\"", "delta": "0:00:00.005851", "end": "2022-01-20 14:54:46.082148", "failed_when_result": true, "msg": "", "rc": 0, "start": "2022-01-20 14:54:46.076297", "stderr": "", "stderr_lines": [], "stdout": "This is a success", "stdout_lines": ["This is a success"]}

因此，使用rcorfailed屬性可以讓您覆寫或更改 Ansible 評估任務結果的內容。

轉載請註明出處，本文鏈接：https://www.uj5u.com/ruanti/418471.html

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