「Certbot」- ImportError: 'pyOpenSSL' module missing required functionality @20210204

问题描述

执行 certbot renew 产生如下错误：

# 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.

问题原因

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。

解决办法

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

参考文献

WikiNotes/ImportError: 'pyOpenSSL' module missing required functionality
ImportError: ‘pyOpenSSL’ module missing required functionality. Try upgrading to v0.14 or newer.