Hi, looking at http://mirror.centos.org/centos/8-stream/extras/x86_64/os/Packages/ I can see only: [image: [ ]] centos-release-ceph-nautilus-1.2-2.el8.noarch.rpm http://mirror.centos.org/centos/8-stream/extras/x86_64/os/Packages/centos-release-ceph-nautilus-1.2-2.el8.noarch.rpm 2020-05-18 19:53 8.8K [image: [ ]] centos-release-ceph-octopus-1.0-1.el8.noarch.rpm http://mirror.centos.org/centos/8-stream/extras/x86_64/os/Packages/centos-release-ceph-octopus-1.0-1.el8.noarch.rpm 2020-05-18 19:53 8.8K but in http://mirror.centos.org/centos/8-stream/storage/x86_64/ there's only Ceph Pacific.
Looks like https://koji.mbox.centos.org/koji/buildinfo?buildID=16908 is missing there. Installing it by hand: yum install https://koji.mbox.centos.org/pkgs/packages/centos-release-ceph-pacific/1.0/1... I see repo is using $release instead of $stream so looks like it will pick up the wrong repo.