这篇文章主要讲解了“如何解决ImportError: 'pyOpenSSL' module missing required functionality的问题”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“如何解决ImportError: 'pyOpenSSL' module missing required functionality的问题”吧！
执行 certbot renew 产生如下错误：
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# certbot renew --renew-hook "docker-compose -f /usr/local/harbor/docker-compose.yml restart"
/usr/lib/python2.7/site-packages/pkg_resources/py2_warn.py:22: UserWarning: Setuptools will stop working on Python 2
************************************************************
You are running Setuptools on Python 2, which is no longer
supported and
>>> SETUPTOOLS WILL STOP WORKING <<<
in a subsequent release (no sooner than 2020-04-20).
Please ensure you are installing
Setuptools using pip 9.x or later or pin to `setuptools<45`
in your environment.
If you have done those things and are still encountering
this message, please comment in
https://github.com/pypa/setuptools/issues/1458
about the steps that led to this unsupported combination.
************************************************************
sys.version_info < (3,) and warnings.warn(pre + "*" * 60 + msg + "*" * 60)
Traceback (most recent call last):
File "/usr/bin/certbot", line 9, in <module>
load_entry_point('certbot==1.0.0', 'console_scripts', 'certbot')()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 490, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2859, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2450, in load
return self.resolve()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2456, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/usr/lib/python2.7/site-packages/certbot/main.py", line 2, in <module>
from certbot._internal import main as internal_main
File "/usr/lib/python2.7/site-packages/certbot/_internal/main.py", line 20, in <module>
from certbot._internal import client
File "/usr/lib/python2.7/site-packages/certbot/_internal/client.py", line 14, in <module>
from acme import client as acme_client
File "/usr/lib/python2.7/site-packages/acme/client.py", line 37, in <module>
requests.packages.urllib3.contrib.pyopenssl.inject_into_urllib3() # type: ignore
File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 118, in inject_into_urllib3
_validate_dependencies_met()
File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 160, in _validate_dependencies_met
"'pyOpenSSL' module missing required functionality. "
ImportError: 'pyOpenSSL' module missing required functionality. Try upgrading to v0.14 or newer.在 CenOS 中，或者其他发行版，我们可以通过 pip 安装 Python 模块，也可以使用 yum 源安装 Python 模块。
也就说，问题可能有两种原因：
1）同个包即通过 yum 安装，也通过 pip 安装，最后导致冲突
2）或者某个模块依赖于更新版本的 pyOpenSSL 模块
从日志中看，可能是 urllib3 模块的问题。
下面是原文作者给出的解决方案，能够解决我们的问题：
pip uninstall -y requests yum reinstall -y python-requests pip uninstall -y six yum reinstall -y python-six pip uninstall -y urllib3 yum reinstall -y python-urllib3
感谢各位的阅读，以上就是“如何解决ImportError: 'pyOpenSSL' module missing required functionality的问题”的内容了，经过本文的学习后，相信大家对如何解决ImportError: 'pyOpenSSL' module missing required functionality的问题这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！
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原文链接：https://my.oschina.net/u/4948974/blog/5017683
