- See also: Dumps/Mirror status
They are currently only offered via http, although ftp and rsync may be offered in the future.
As of May 2019 they are hosted on sodium.wikimedia.org.
The relevant Puppet class is modules/role/manifests/mirrors.pp.
There are 2 Icinga checks called "Ubuntu mirror in sync with upstream" and "Debian mirror in sync with upstream" respectively.
If one of these alerts you should check on sodium what happens if you manually run the check commands, "/usr/local/lib/nagios/plugins/check_apt_mirror /srv/mirrors/ubuntu" / "/usr/local/lib/nagios/plugins/check_apt_mirror /srv/mirrors/debian".
Furthermore, you can check /etc/ftpsync/ftpsync.conf to see which upstream hosts we are rsyncing from and look at /var/log/ftpsync/ to check logfiles for errors.
If the error appears to be on the upstream side you should try contacting firstname.lastname@example.org or email@example.com. There is also channel #ubuntu-mirrors on Freenode.