PSA: mgr is now blacklisted during failover

https://github.com/ceph/ceph/pull/31797 Note: RADOS and cephfs handles use a new mgr interface to register their client address for potential blacklisting [2,3]. This means that the old blacklisted mgr cannot continue interacting with RADOS/CephFS once it's replaced by the monitors. If your ceph-mgr plugin creates a client connection with RADOS separately from the standard "rados" [1] handle, you should register this handle so it can be blacklisted by the monitors during failover. [1] https://github.com/ceph/ceph/blob/88e79c31a7cec0dae8e091aa4da0ee5975108c93/… [2] https://github.com/ceph/ceph/blob/88e79c31a7cec0dae8e091aa4da0ee5975108c93/… [3] https://github.com/ceph/ceph/blob/88e79c31a7cec0dae8e091aa4da0ee5975108c93/… -- Patrick Donnelly, Ph.D. He / Him / His Senior Software Engineer Red Hat Sunnyvale, CA GPG: 19F28A586F808C2402351B93C3301A3E258DD79D