One of the configured repositories failed (MariaDB100)

On a Cpanel server, when running “yum update”, I got the error message “One of the configured repositories failed (MariaDB100)”.

[root@cp ~]# yum update
Loaded plugins: fastestmirror, universal-hooks
Loading mirror speeds from cached hostfile
 * EA4: 178.18.193.52
 * cpanel-addons-production-feed: 178.18.193.52
 * cpanel-plugins: 178.18.193.52
 * base: centos.uni-sofia.bg
 * extras: centos.uni-sofia.bg
 * updates: centos.uni-sofia.bg
http://yum.mariadb.org/10.0/centos7-amd64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below wiki article 

https://wiki.centos.org/yum-errors

If above article doesn't help to resolve this issue please use https://bugs.centos.org/.



 One of the configured repositories failed (MariaDB100),
 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:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=MariaDB100 ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable MariaDB100
        or
            subscription-manager repos --disable=MariaDB100

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=MariaDB100.skip_if_unavailable=true

failure: repodata/repomd.xml from MariaDB100: [Errno 256] No more mirrors to try.
http://yum.mariadb.org/10.0/centos7-amd64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
[root@cp ~]# 

The error is because MariaDB 10.0 is the end of life.

To fix the error message, remove the MairaDB repo file

cd /etc/yum.repos.d/
mv MariaDB* ~/

Now yum update will work.

To update MairaDB from 10.0 to the supported 10.2 version, create a file

vi /etc/yum.repos.d/MariaDB.repo

with following content

# MariaDB 10.2 CentOS repository list - created 2022-07-31 16:26 UTC
# https://mariadb.org/download/
[mariadb]
name = MariaDB
baseurl = https://mirror.rackspace.com/mariadb/yum/10.2/centos7-amd64
gpgkey=https://mirror.rackspace.com/mariadb/yum/RPM-GPG-KEY-MariaDB
gpgcheck=1

This is for CentOS 7 + MariaDB 10.2, if you have different Linux distribution or MairaDB version, you can generate repository config at

https://mariadb.org/download/?t=repo-config

Take a backup of current MySQL databases with

mysqldump --opt --triggers --routines --events --all-databases > all-db.sql

Upgrade MariaDB with

yum update

After MariaDB packages are updated to the newer version, update Databases with

mysql_upgrade

See Errors