Failure from epel with yum command - pip

Question

Thank you for coming to try to solve my problem. I have seen a lot of solutions about a failure using the yum command but until now, these solutions didn't work with me.
First of all, here is some information about the situation :
I'm working with a RedHat Linux 7.2-11, using a proxy (because of the very secured network of my firm) so I already modified etc/sysconfig/rhn/up2date, etc/wgetrc and etc/yum.conf files with the http_proxy, proxy_user and proxy_password !
Then, I'm connected as root and I tried to download python-pip doing these command :
sudo yum install python-pip
I had the following error :
No package python-pip available
Exactly the same error when trying to install epel-release before python-pip.
Then I did the following :
yum install httpd php php-gd php-mysql
Finally, I downloaded and installed epel-release with these commands in /tmp :
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
sudo yum install epel-release-latest-7.noarch.rpm
Everything was ok !
Here is the problem. After that, I tried again these commands :
sudo yum install python-pip
sudo yum install -y python-pip
The first error was :
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
So I followed some instructions and modified epel.repo and epel-testing.repo commenting all "mirror" lines and uncommenting all "baseurl" lines.
So, now, when I try to install python-pip again I have this error :
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
Please do you know how to solve this issue, or do you have any idea ?
It seems to be because of the proxy but I already configured the three files as said on top of my message.
Thank you for your help ! :)

Answer 1

You don't have to download epel-release manually on a CentOS-7 box. The latest RPM might be missing mirrorlist in the repo file, which is probably calling baseurl=http:// rather than mirrorlist=https://.
Here is what you can do to resolve this:
# 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