Comment 5 for bug 1905034

adding some notes as I've been digging here but hopefully ykarel will post a patch per comment #4 once gerrit is back in service

the error we're seeing here is coming from the task in https://opendev.org/openstack/tripleo-upgrade/src/commit/6e4d20c22d30bb0a01e944c8a33fd02a52df98f1/tasks/common/undercloud_prerequisites.yaml#L11

However I don't think the bug is anything to do with the upgrades workflow here per se (especially I can't see any updates in that file in tripleo-upgrade). The error in https://af8f541e885d71823a86-a17c91d89a0966538758fa02ae1f57d0.ssl.cf2.rackcdn.com/757821/8/check/tripleo-ci-centos-8-undercloud-upgrade-ussuri/9bce46b/logs/undercloud/etc/yum.repos.d/delorean.repo is

<h1>Not Found</h1>
<p>The requested URL /centos8-ussuri/acac7a32b596342e0c8a8afd913ca6a9/delorean.repo was not found on this server.</p>

But the repo is there, albeit with the full prefix i.e. at https://trunk.rdoproject.org/centos8-ussuri/current-tripleo/ac/ac/acac7a32b596342e0c8a8afd913ca6a9/ (includes "/ac/ac/")

So hopefully it will be fixed by ykarel patch in comment 4

What is still not clear for me is why we have just started seeing this issue?