Error: Failed to download metadata for repo 'epel': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

[Kaushal Shriyan <kaushalshriyan@xxxxxxxxx>]

Hi,

I am running Red Hat Enterprise Linux release 8.7 (Ootpa) OS in production environment.  I have enabled both epel in /etc/yum.repos.d directory

There is a proxy server setup in the network. I have whitelisted the below wildcard URLs as listed as per epel repo.

https://*.fedoraproject.org

#cat /etc/yum.repos.d/epel.repo
[epel]
name=Extra Packages for Enterprise Linux 8 - $basearch
# It is much more secure to use the metalink, but if you wish to use a local mirror
# place its address here.
#baseurl=https://download.example/pub/epel/8/Everything/$basearch
metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-8&arch=$basearch&infra=$infra&content=$contentdir
enabled=1
gpgcheck=1
countme=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-8

I have only whitelisted https://*.fedoraproject.org on the http proxy server. Do I need to whitelist any additional URLs to address the above issue, or Am I missing anything?

#yum -y install htop

Extra Packages for Enterprise Linux 8 - x86_64                                                                                                                                                               49  B/s | 3.2 kB     01:05
Errors during downloading metadata for repository 'epel':
  - Curl error (28): Timeout was reached for https://mirrors.tuna.tsinghua.edu.cn/epel/8/Everything/x86_64/repodata/repomd.xml [Operation timed out after 30000 milliseconds with 0 out of 0 bytes received]

As you can see, http://mirrors.fedoraproject.org/ choose a random mirror as per the above output. I did run the below command. 

[root@ yum.repos.d]# pwd
/etc/yum.repos.d
[root@ yum.repos.d]# grep -iR tsinghua.edu.cn *

[root@ yum.repos.d]# 

I could not see the tsinghua.edu.cn URL in /etc/yum.repos.d. 

Please suggest. Thanks in advance

Best Regards,

Kaushal

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