我的一个 Ansible 任务不断失败。但是，问题不在于任务失败(我希望它失败)，而是我想做的是显示它成功，即使它失败了。
我想这样做的原因是，该任务正在使用 WinRM 在 Windows 服务器上运行 Powershell 脚本，而 Powershell 脚本正在为 WinRM 启用证书身份验证。这会导致在 Windows 服务器上重置 WinRM 服务时中止与服务器的 WinRM 连接。因此，当对 WinRM 应用这些更改时，任务将失败。
任务失败的事实很好，因为行动手册中的下一个任务是检查 WinRM 的更改是否已成功应用。因此，任务使用参数"ignore_errors：是"运行。但是，我想显示任务是成功的，即使它失败了。我尝试设置参数"failed_when：false"(任务应该始终成功)和"no_log：true"，但这似乎对任务没有任何影响，它仍然给出以下输出：
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"}
完整的任务如下所示：
- 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
Powershell 脚本"ConfigureWinRMCertificateAuthentication.ps1"在执行此任务之前以 {{ remote_working_dir }} 的形式上载到服务器。Powershell 脚本只需配置 WinRM 服务要使用的 CA 证书、用户证书和服务器证书，使用新证书创建新的 WSMan 实例，然后为 WinRM 启用基于证书的身份验证。
在没有"no_log： true"的情况下运行任务时的错误是：
requests.exceptions.ConnectionError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))
fatal: [172.27.25.37]: FAILED! => {
"msg": "Unexpected failure during module execution.",
"stdout": ""
TL;博士： 我想问的问题是，有没有办法将任务执行期间连接中止的任务显示为成功？
编辑：
添加任务注册结果的输出：
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 urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nOSError: (104, 'ECONNRESET')nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in sendn resp = conn.urlopen(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 719, in urlopenn retries = retries.increment(n File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 400, in incrementn raise six.reraise(type(error), error, _stacktrace)n File "/usr/lib/python3/dist-packages/six.py", line 702, in reraisen raise value.with_traceback(tb)n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 146, in runn res = self._execute()n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 645, in _executen result = self._handler.run(task_vars=variables)n File "/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py", line 46, in runn 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_modulen 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_commandn 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_commandn 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_execn 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_outputn 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_outputn res = self.send_message(xmltodict.unparse(req))n File "/usr/local/lib/python3.8/dist-packages/winrm/protocol.py", line 243, in send_messagen resp = self.transport.send_message(message)n File "/usr/local/lib/python3.8/dist-packages/winrm/transport.py", line 323, in send_messagen 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_requestn response = self.session.send(prepared_request, timeout=self.read_timeout_sec)n File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in sendn r = adapter.send(request, **kwargs)n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 498, in sendn raise ConnectionError(err, request=request)nrequests.exceptions.ConnectionError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))n",
"failed": true,
"msg": "Unexpected failure during module execution.",
"stdout": ""
}
}
编辑 2：
使用以下配置运行任务：
- 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 }}"
生成以下调试输出(以及失败的任务)：
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 urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nOSError: (104, 'ECONNRESET')nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in sendn resp = conn.urlopen(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 719, in urlopenn retries = retries.increment(n File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 400, in incrementn raise six.reraise(type(error), error, _stacktrace)n File "/usr/lib/python3/dist-packages/six.py", line 702, in reraisen raise value.with_traceback(tb)n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 146, in runn res = self._execute()n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 645, in _executen result = self._handler.run(task_vars=variables)n File "/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py", line 46, in runn 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_modulen 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_commandn 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_commandn 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_execn 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_outputn 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_outputn res = self.send_message(xmltodict.unparse(req))n File "/usr/local/lib/python3.8/dist-packages/winrm/protocol.py", line 243, in send_messagen resp = self.transport.send_message(message)n File "/usr/local/lib/python3.8/dist-packages/winrm/transport.py", line 323, in send_messagen 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_requestn response = self.session.send(prepared_request, timeout=self.read_timeout_sec)n File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in sendn r = adapter.send(request, **kwargs)n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 498, in sendn raise ConnectionError(err, request=request)nrequests.exceptions.ConnectionError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))n",
"failed": true,
"msg": "Unexpected failure during module execution.",
"stdout": ""
}
}
然后使用以下配置运行任务：
- 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 }}"
生成以下调试输出(以及失败的任务)：
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 urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nOSError: (104, 'ECONNRESET')nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in sendn resp = conn.urlopen(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 719, in urlopenn retries = retries.increment(n File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 400, in incrementn raise six.reraise(type(error), error, _stacktrace)n File "/usr/lib/python3/dist-packages/six.py", line 702, in reraisen raise value.with_traceback(tb)n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in urlopenn httplib_response = self._make_request(n File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 421, in _make_requestn six.raise_from(e, None)n File "<string>", line 3, in raise_fromn File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 416, in _make_requestn httplib_response = conn.getresponse()n File "/usr/lib/python3.8/http/client.py", line 1348, in getresponsen response.begin()n File "/usr/lib/python3.8/http/client.py", line 316, in beginn version, status, reason = self._read_status()n File "/usr/lib/python3.8/http/client.py", line 277, in _read_statusn line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")n File "/usr/lib/python3.8/socket.py", line 669, in readinton return self._sock.recv_into(b)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 328, in recv_inton return self.recv_into(*args, **kwargs)n File "/usr/lib/python3/dist-packages/urllib3/contrib/pyopenssl.py", line 318, in recv_inton raise SocketError(str(e))nurllib3.exceptions.ProtocolError: ('Connection aborted.', OSError("(104, 'ECONNRESET')"))nnDuring handling of the above exception, another exception occurred:nnTraceback (most recent call last):n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 146, in runn res = self._execute()n File "/usr/lib/python3/dist-packages/ansible/executor/task_executor.py", line 645, in _executen result = self._handler.run(task_vars=variables)n File "/usr/lib/python3/dist-packages/ansible/plugins/action/normal.py", line 46, in runn 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_modulen 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_commandn 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_commandn 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_execn 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_outputn 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_outputn res = self.send_message(xmltodict.unparse(req))n File "/usr/local/lib/python3.8/dist-packages/winrm/protocol.py", line 243, in send_messagen resp = self.transport.send_message(message)n File "/usr/local/lib/python3.8/dist-packages/winrm/transport.py", line 323, in send_messagen 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_requestn response = self.session.send(prepared_request, timeout=self.read_timeout_sec)n File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in sendn r = adapter.send(request, **kwargs)n File "/usr/lib/python3/dist-packages/requests/adapters.py", line 498, in sendn 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参数(无论我将其设置为什么)似乎对任务的结果没有影响。
执行中断连接的任务的正常解决方法是在即发即弃模式下使用async。在实施reboot操作之前，此模式曾经经常用于服务器重新启动。
- 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
脚本开头添加的睡眠可确保在连接中断之前有时间将初始异步状态返回到 Ansible 控制器;async: 60异步运行任务，超时时间为 60 秒，poll: 0告诉 Ansible 立即转到下一个任务。
这通常紧随其后的是类似
- name: Wait for the server to come back
wait_for_connection:
delay: 30
timeout: 300
以正常重试连接，直到服务器再次可访问。
使用寄存器和".failed"。这是我自己的一个案例，我正在测试 kubernetes 部署无法按预期部署：
- 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
因此，我宣布如果任务没有失败，则被视为"失败"。换句话说，如果任务成功(部署部署)，则我认为任务失败。
为了响应注释中的更多查询，这是另一个示例，您可能会根据 rc(或返回代码 - 在 Windows 上，我相信这也称为批处理脚本中的错误级别)失败
我们从一个将失败的简单任务开始：
- name: Do something that fails
shell:
cmd: /usr/bin/false
这给了我们预期的错误：
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": []}
现在让我们添加一个寄存器并转储内容。我们必须添加ignore_errors以便继续执行
- 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": []
}
}
现在请注意这里的rc1？让我们更改任务，以便仅在0rc时才使任务失败(即，如果rc或返回代码为零，则我们认为这是失败)。我们现在还删除了ignore_errors：
- name: Do something that fails
shell:
cmd: /usr/bin/false
register: test
failed_when: test.rc == 0
- debug:
msg: "{{test}}"
现在，当我们运行它时，它不会失败，即使任务中的命令实际上失败了。
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，如果我们做同样的事情，但使用一个实际成功的命令会发生什么：
- 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rc或failed属性可以让您覆盖或更改 Ansible 评估任务结果的内容。