CentOS7服务器Certbot运行报错pkg_resources.DistributionNotFound:mock求解决

问题详情 #

在CentOS 7 VPS服务器上执行yum install certbot后，系统提示*Package certbot-1.11.0-2.el7.noarch already installed and latest version*，但运行certbot命令时出现以下错误栈：

Traceback (most recent call last):
  File "/usr/bin/certbot", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 3007, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 728, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 626, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: mock

服务器已安装的mock相关包：

rpm -qa |grep mock
easymock2-2.5.2-12.el7.noarch
python2-mock-1.0.1-10.el7.noarch

解决步骤 #

方法1：修复python2-mock的pkg_resources注册 #

• 卸载并重新安装python2-mock：

  yum remove -y python2-mock
  yum install -y python2-mock
  

• 刷新Python资源缓存：

  python -m pkg_resources
  rm -rf /usr/lib/python2.7/site-packages/pkg_resources/__pycache__
  

方法2：通过pip强制重新安装mock #

如果服务器已安装pip2，执行：

pip2 install mock --force-reinstall

方法3：重新安装Certbot及全部依赖 #

yum reinstall -y certbot

方法4：验证Certbot的Python版本关联 #

检查Certbot使用的Python版本：

head -n 1 /usr/bin/certbot

确保输出为#!/usr/bin/python或#!/usr/bin/python2，若指向Python 3，需修改为Python 2路径，或在Python 3环境中安装mock包。

内容的提问来源于stack exchange，提问作者Shaheel K Karuvattil