这是我的 question 的“后续”从上周开始。基本上我看到一些使用 pexpect ssh-copy-id 的 python 代码偶尔挂起。
我认为这可能是一个pexct问题，但在我能够从这样的挂起中收集“堆栈跟踪”后，我不再那么确定了。 在这里你可以看到我的应用程序的一些痕迹；接下来是遇到超时后的堆栈跟踪:
2016-07-01 13:23:32 DEBUG copy command: ssh-copy-id -i /yyy/.ssh/id_rsa.pub <a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bbc8d4d6decec8dec9fbc8d4d6de95d2cb" rel="noreferrer noopener nofollow">[email protected]</a>
2016-07-01 13:23:33 DEBUG first expect: 1
2016-07-01 13:23:33 DEBUG sending PASSW0RD
2016-07-01 13:23:33 DEBUG consuming output from remote side ...
2016-07-01 13:24:03 INFO Timeout occured ... stack trace information ...
2016-07-01 13:24:03 INFO Traceback (most recent call last):
File "/usr/local/lib/python3.5/site-packages/pexpect-3.3-py3.5.egg/pexpect/__init__.py", line 1535, in expect_loop
c = self.read_nonblocking(self.maxread, timeout)
File "/usr/local/lib/python3.5/site-packages/pexpect-3.3-py3.5.egg/pexpect/__init__.py", line 968, in read_nonblocking
raise TIMEOUT('Timeout exceeded.')
pexpect.TIMEOUT: Timeout exceeded.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "xxx/PrepareSsh.py", line 28, in execute
self.copy_keys(context, user, timeout)
File "xxx/PrepareSsh.py", line 83, in copy_keys
child.expect('[#\$]')
File "/usr/local/lib/python3.5/site-packages/pexpect-3.3-py3.5.egg/pexpect/__init__.py", line 1451, in expect
timeout, searchwindowsize)
File "/usr/local/lib/python3.5/site-packages/pexpect-3.3-py3.5.egg/pexpect/__init__.py", line 1466, in expect_list
timeout, searchwindowsize)
File "/usr/local/lib/python3.5/site-packages/pexpect-3.3-py3.5.egg/pexpect/__init__.py", line 1568, in expect_loop
raise TIMEOUT(str(err) + '\n' + str(self))
pexpect.TIMEOUT: Timeout exceeded.
<pexpect.spawn object at 0x2b74694995c0>
version: 3.3
command: /usr/bin/ssh-copy-id
args: ['/usr/bin/ssh-copy-id', '-i', '/yyy/.ssh/id_rsa.pub', '<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="fc8f939199898f998ebc8f939199d2958c" rel="noreferrer noopener nofollow">[email protected]</a>']
searcher: <pexpect.searcher_re object at 0x2b746ae1c748>
buffer (last 100 chars): b'\r\n/usr/bin/xauth: creating new authorityy file /home/hmcmanager/.Xauthority\r\n'
before (last 100 chars): b'\r\n/usr/bin/xauth: creating new authority file /home/hmcmanager/.Xauthority\r\n'
after: <class 'pexpect.TIMEOUT'>
所以，我觉得有点奇怪:xauth 出现在 pexpect 收到的消息中。
你看，今天我创建了另一个虚拟机用于测试；并手动完成所有设置。这是我这样做时看到的:
> ssh-copy-id -i ~/.ssh/id_rsa.pub <a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d0a3bfbdb5a5a3b5a290a3bfbdb5feb9a0" rel="noreferrer noopener nofollow">[email protected]</a>
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/xxx/.ssh/id_rsa.pub"
The authenticity of host 'some.ip (some.ip)' can't be established.
ECDSA key fingerprint is SHA256:7...
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="94e7fbf9f1e1e7f1e6d4e7fbf9f1bafde4" rel="noreferrer noopener nofollow">[email protected]</a>'s password:
Number of key(s) added: 1
Now try logging into the machine, with: ....
那么，让我们回顾一下:
- 当我手动运行 ssh-copy-id 时......一切正常；并且字符串“xauth”不会出现在返回的输出中
- 当我以编程方式运行 ssh-copy-id 时，它在大多数情况下都有效；但有时会出现超时...并且有关 xauth 的消息会发送给我的客户端
这让我发疯。欢迎任何想法。
最佳答案
xauth 引用闻起来像是您正在请求 X11 转发。它将在您的 ~/.ssh/config 中进行配置。这可能是您的配置差异导致挂起的原因。
关于python - ssh-copy-id 有时会挂起，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38179980/