在crontab中运行Python Fabric命令时，密码输入可能会被回响。

Question

我在Mac OS上试图通过crontab运行我的程序时遇到了问题。当我的程序独立运行时，它可以正常工作。通常情况下，我从来没有为远程系统密码设置env.password，而是设置env.key_filename。相反，我设置env.key_filename。如果我不需要运行sudo命令，它就能正常工作。所以理想情况下，它不应该提示输入任何密码。

通过参考 https:/github.comfabricfabricissues1230。我也尝试设置环境变量来传递密码。然而，我还是得到同样的错误。我错过了什么？有谁可以帮助我？

谢谢

错误msg:

/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/getpass.py:83: GetPassWarning: Can not control echo on the terminal.
  passwd = fallback_getpass(prompt, stream)
Warning: Password input may be echoed.
[xxx.xxx.xxx.xxx] Login password for 'xxx': [xxx.xxx.xxx.xxx] Executing task 'System.Monitor.free_mem'

[+] Start checking system total/free memory in MB:
[xxx.xxx.xxx.xxx] run: free -m
Traceback (most recent call last):
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/main.py", line 757, in main
    *args, **kwargs
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/tasks.py", line 386, in execute
    multiprocessing
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/tasks.py", line 276, in _execute
    return task.run(*args, **kwargs)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/tasks.py", line 173, in run
    return self.wrapped(*args, **kwargs)
  File "/Users/thomas.pan/Python-ninja/playwith/DevOps/System/Monitor.py", line 69, in free_mem
    run("free -m")
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 687, in host_prompting_wrapper
    return func(*args, **kwargs)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/operations.py", line 1090, in run
    shell_escape=shell_escape, capture_buffer_size=capture_buffer_size,
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/operations.py", line 930, in _run_command
    channel=default_channel(), command=wrapped_command, pty=pty,
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/state.py", line 424, in default_channel
    chan = _open_session()
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/state.py", line 416, in _open_session
    return connections[env.host_string].get_transport().open_session()
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 159, in __getitem__
    self.connect(key)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 151, in connect
    user, host, port, cache=self, seek_gateway=seek_gateway)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 569, in connect
    password = prompt_for_password(text)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 652, in prompt_for_password
    new_password = _password_prompt(password_prompt, stream)
  File "/usr/local/var/pyenv/versions/2.7.10/lib/python2.7/site-packages/fabric/network.py", line 624, in _password_prompt
    return getpass.getpass(prompt.encode('ascii', 'ignore'), stream)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/getpass.py", line 83, in unix_getpass
    passwd = fallback_getpass(prompt, stream)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/getpass.py", line 118, in fallback_getpass
    return _raw_input(prompt, stream)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/getpass.py", line 135, in _raw_input
    raise EOFError
EOFError

Answer 1

用LaunchControl工具切换到Launchd，问题就解决了。这不是Fabric的问题。

Answer 2

万一对任何人都有帮助--如果你运行的命令是登录到一个实例，这个GetPassWarningOEFError问题可能会在cron作业中发生，因为shell会话不知道如何登录到该实例。

要解决这个问题，你可能需要给crond提供ssh上下文。ssh-cron 例如，可以做到这一点，因为看起来在crontab中设置这一切是有困难的。