I am trying to install lets encrypt on an old machine (Cenos 6 running apache)., but it seems to be trying to access a database that no longer exist at http://toolkit.globus.org/
http://toolkit.globus.org/ftppub/gt6/stable/rpm/el/6/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - “The requested URL returned error: 404 Not Found”
Trying other mirror.
To address this issue please refer to the below wiki article
If above article doesn’t help to resolve this issue please use https://bugs.centos.org/.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: Globus-Toolkit-6-el6. Please verify its path and try again
Could not install OS dependencies. Aborting bootstrap!