[root@db yum.repos.d]# yum makecache

Loaded plugins: fastestmirror, refresh-packagekit, security

Loading mirror speeds from cached hostfile

Error: Cannot find a valid baseurl for repo: elasticsearch-6.x

[root@db yum.repos.d]# vim /etc/yum/pluginconf.d/fastestmirror.conf

Change 1 to 0

Then go to the yum source and configure

If there are plugins=1 then change it to 0, not adding them.