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

CentOS7 安装Certbot 报错

执行 certbot certonly 报错如下：

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

网上的方法如果你去测试可能会发现pip show pyOpenSSL 的版本是 17.x.x，这个时候，先删除所有的yum remove certbot && pip uninstall pyOpenSSL，再重新安装如下依赖：

yum install -y python-devel
yum install -y openssl-devel

(以上两句是关键，然后再重新安装certbot)

再次执行certbot certonly会出现如下报错：

[root@f2 ~]# certbot certonly
Traceback (most recent call last):
  File "/usr/bin/certbot", line 9, in <module>
    load_entry_point('certbot==0.19.0', 'console_scripts', 'certbot')()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 570, 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 2751, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2405, in load
    return self.resolve()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2411, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/site-packages/certbot/main.py", line 19, in <module>
    from certbot import client
  File "/usr/lib/python2.7/site-packages/certbot/client.py", line 11, in <module>
    from acme import client as acme_client
  File "/usr/lib/python2.7/site-packages/acme/client.py", line 34, in <module>
    urllib3.contrib.pyopenssl.inject_into_urllib3()
  File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 112, in inject_into_urllib3
    _validate_dependencies_met()
  File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 147, in _validate_dependencies_met
    raise ImportError("'pyOpenSSL' module missing required functionality. "
ImportError: 'pyOpenSSL' module missing required functionality. Try upgrading to v0.14 or newer.
[root@f2 ~]# 

这个时候已经快大功告成了，执行升级即可：

pip install pyOpenSSL
pip install PyOpenSSL