使用 yum 命令从 epel 失败

Question

感谢您前来尝试解决我的问题。我已经看到了很多关于使用 yum 命令失败的解决方案，但直到现在，这些解决方案都不适用于我。

首先，这里有一些关于情况的信息： 我正在使用 RedHat Linux 7.2-11，使用代理（因为我公司的网络非常安全）所以我已经修改了 etc/sysconfig/rhn/up2date、etc/wgetrc 和 etc/yum.conf 文件http_proxy、proxy_user 和 proxy_password ！

然后，我以 root 身份连接，并尝试执行以下命令下载 python-pip：

sudo yum install python-pip

我有以下错误：

No package python-pip available

尝试在 python-pip 之前安装 epel-release 时出现完全相同的错误。 然后我做了以下事情：

yum install httpd php php-gd php-mysql

最后，我在 /tmp 中使用这些命令下载并安装了 epel-release：

wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
sudo yum install epel-release-latest-7.noarch.rpm

一切正常！

这就是问题所在。之后，我再次尝试了这些命令：

sudo yum install python-pip
sudo yum install -y python-pip

第一个错误是：

One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
........some tips (1 to 5)........
Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again

所以我按照一些说明修改了 epel.repo 和 epel-testing.repo 注释所有“镜像”行并取消注释所有“baseurl”行。 所以，现在，当我再次尝试安装 python-pip 时，我遇到了这个错误：

Loaded plugins: rhnplugin, search-disabled-repos
This system is receiving updates from RHN Classic or Red Hat Satellite.
http://download.fedoraproject.org/pub/epel/7/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 407 - Proxy Authentication Required
Trying other mirror.


One of the configured repositories failed (Extra Packages for Enterprise Linux 7 - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:

.........some tips (1 to 5).......

failure: repodata/repomd.xml from epel: [Errno 256] No more mirrors to try.
http://download.fedoraproject.org/pub/epel/7/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 407 - Proxy Authentication Required

请问您知道如何解决此问题，或者您有什么想法吗？ 这似乎是因为代理，但我已经按照消息顶部的说明配置了三个文件。

感谢您的帮助！ :)

Answer 1

您不必在 CentOS-7 机器上手动下载epel-release。最新的 RPM 可能在 repo 文件中缺少mirrorlist，它可能调用baseurl=http:// 而不是mirrorlist=https://。

您可以采取以下措施来解决此问题：

 # Remove already installed epel-release
 yum remove epel-release
 OR
 rpm -e epel-release

 # Install epel-release using YUM
 yum install epel-release

 # Install python-pip
 yum install python-pip
~]# yum install python-pip
Loaded plugins: fastestmirror
epel/x86_64/metalink                                                                                                                                  |  11 kB  00:00:00     
epel                                                                                                                                                 | 4.3 kB  00:00:00     
(1/3): epel/x86_64/group_gz                                                                                                                          | 170 kB  00:00:00     
(2/3): epel/x86_64/updateinfo                                                                                                                        | 769 kB  00:00:01     
(3/3): epel/x86_64/primary_db                                                                                                                        | 4.6 MB  00:00:06     
Loading mirror speeds from cached hostfile
* base: mirror.eboundhost.com
* epel: ftp.cse.buffalo.edu
* extras: repo.us.bigstepcloud.com
* updates: centos.mirrors.tds.net
Resolving Dependencies
--> Running transaction check
---> Package python2-pip.noarch 0:8.1.2-5.el7 will be installed
--> Processing Dependency: python-setuptools for package: python2-pip-8.1.2-5.el7.noarch
--> Running transaction check
---> Package python-setuptools.noarch 0:0.9.8-4.el7 will be installed
--> Processing Dependency: python-backports-ssl_match_hostname for package: python-setuptools-0.9.8-4.el7.noarch
--> Running transaction check
---> Package python-backports-ssl_match_hostname.noarch 0:3.4.0.2-4.el7 will be installed
--> Processing Dependency: python-backports for package: python-backports-ssl_match_hostname-3.4.0.2-4.el7.noarch
--> Running transaction check
---> Package python-backports.x86_64 0:1.0-8.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved


  Package                                                      Arch                                Version  

  Repository                     Size

Installing:
 python2-pip                                                  noarch                          8.1.2-5.el7                               epel                          1.7 M
Installing for dependencies:
 python-backports                                             x86_64                          1.0-8.el7                                 base                          5.8 k
 python-backports-ssl_match_hostname                          noarch                          3.4.0.2-4.el7                             base                           12 k
 python-setuptools                                            noarch                          0.9.8-4.el7                               base                          396 k

Transaction Summary