centos7.3 yum不可用

ゞ浴缸里的玫瑰 2023-06-21 14:25 27阅读 0赞

背景：

centos7.3想通过yum安装mysql服务，发现yum不可用，下面是解决问题的过程

日志：

直接使用yum命令，报错日志截取一部分

There was a problem importing one of the Python modules  
required to run yum. The error leading to this problem was:

No module named yum // 注意这句话，表明没有yum这个模块

问题排查

网上查找资料，多数是说python版本冲突的，就是说有多个python版本，需要修改 /usr/bin/yum文件，检查环境并没有版本冲突

root@172.16.24.220[/home/lushuan/rpm/yum/python]#python -V
    Python 2.7.5
    root@172.16.24.220[/home/lushuan/rpm/yum/python]#whereis python
    python: /usr/bin/python /usr/bin/python2.7 /usr/lib/python2.7 /usr/lib64/python2.7 /etc/python /usr/include/python2.7 /usr/share/man/man1/python.1.gz

修改/usr/bin/yum文件

\#!/usr/bin/python  更改为 \#!/usr/bin/python2.7

到这里感觉无从下手了，讲的都是通过rpm重装yum

卸载yum

root@172.16.24.220\[/etc/yum.repos.d\]\#rpm -qa|grep -i yum  
yum-metadata-parser-1.1.4-10.el7.x86\_64  
yum-plugin-fastestmirror-1.1.31-40.el7.noarch  
yum-3.4.3-150.el7.centos.noarch

卸载

rpm -e yum-plugin-fastestmirror-1.1.31-40.el7.noarch --nodeps

rpm -e yum-3.4.3-150.el7.centos.noarch --nodeps

rpm -e yum-metadata-parser-1.1.4-10.el7.x86\_64 --nodeps

下载yum

wget http://vault.centos.org/7.2.1511/os/x86\_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

wget http://vault.centos.org/7.3.1611/os/x86\_64/Packages/yum-plugin-1.0.7-6.el7.centos.x86\_64.rpm

wget http://vault.centos.org/7.2.1511/os/x86\_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86\_64.rpm

重新安装

root@172.16.24.220\[/home/lushuan/rpm/yum/test\]\#rpm -ivh yum-\*  
warning: yum-3.4.3-132.el7.centos.0.1.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY  
Preparing...                          \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[100%\]  
Updating / installing...  
   1:yum-metadata-parser-1.1.4-10.el7 \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[ 33%\]  
   2:yum-plugin-fastestmirror-1.1.31-3\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[ 67%\]  
   3:yum-3.4.3-132.el7.centos.0.1     \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[100%\]

再次使用yum命令

root@172.16.24.220\[/home/lushuan/rpm/yum/test\]\#yum   
There was a problem importing one of the Python modules  
required to run yum. The error leading to this problem was:

No module named urlgrabber  // 注意这里是缺少 urlgrabber  包，报错日志变了

在网易镜像上下载对应rpm包安装

wget http://mirrors.163.com/centos/7/os/x86\_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm

直接安装报错，这里注意一下，说是和python自带的模块冲突

root@172.16.24.220\[/home/lushuan/rpm/yum/python\]\#rpm -ivh python-urlgrabber-3.10-9.el7.noarch.rpm   
warning: python-urlgrabber-3.10-9.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY  
Preparing...                          \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[100%\]  
        file /usr/lib/python2.7/site-packages/urlgrabber/grabber.py from install of python-urlgrabber-3.10-9.el7.noarch conflicts with file from package python-urlgrabber-3.10-8.el7.noarch  
        file /usr/lib/python2.7/site-packages/urlgrabber/grabber.pyc from install of python-urlgrabber-3.10-9.el7.noarch conflicts with file from package python-urlgrabber-3.10-8.el7.noarch  
        file /usr/lib/python2.7/site-packages/urlgrabber/grabber.pyo from install of python-urlgrabber-3.10-9.el7.noarch conflicts with file from package python-urlgrabber-3.10-8.el7.noarch

卸载python自带urlgrabber 包，发现就没有安装

root@172.16.24.220\[/home/lushuan/rpm/yum/python\]\#rpm -e python-urlgrabber-3.10-9.el7.noarch  
error: package python-urlgrabber-3.10-9.el7.noarch is not installed

没办法只能强制安装了

root@172.16.24.220\[/home/lushuan/rpm/yum/python\]\#rpm -ivh python-urlgrabber-3.10-9.el7.noarch.rpm  \--nodeps --force  
warning: python-urlgrabber-3.10-9.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY  
Preparing...                          \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[100%\]  
Updating / installing...  
   1:python-urlgrabber-3.10-9.el7     \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\# \[100%\]

再次验证ok, over

参考：[https://blog.csdn.net/kucoll/article/details/81585117][https_blog.csdn.net_kucoll_article_details_81585117]

[https://blog.csdn.net/weixin\_34194379/article/details/91733391][https_blog.csdn.net_weixin_34194379_article_details_91733391]

[https_blog.csdn.net_kucoll_article_details_81585117]: https://blog.csdn.net/kucoll/article/details/81585117
[https_blog.csdn.net_weixin_34194379_article_details_91733391]: https://blog.csdn.net/weixin_34194379/article/details/91733391