I've been setting up a cookbook OSD creation process and as I walked through the various stages, I noted that the /etc/redhat-release file said "CentOS Stream 8". I panicked, because IBM has pulled the Ceph archives for CentOS 8 and nuked the machine, then rebuilt it with more attention to detail. I consistently was seeing the correct redhat-release until I installed cephadm and ran cephadm shell. Cephadm is running a chroot jail, it seems, and it's plugging in the wrong value for that file. Presumably from its internal image instead of copying the actual file. The false release string does not leak outside of cephadm, though. So far this appears to be only important as a possible confusion point, but it is of concern since the repositories in /etc/yum.repos.d download from repositories whose URLs are derived from the OS release that YUM (dnf) thinks it's running under and I'd hate to find out the hard way that something got confused. Probably rpm and yum/dnf shouldn't be available from within cephadm, but since cephadm pulls stuff internally that may not be possible. This was seen on AlmaLinux 9.4, cephadm version 16.2.15.