Description of problem: ======================= While performing add host for RHEL 8 host to the RHEL 9 admin node it fails with below error: [ceph: root@ceph-vpap-81-bmunv8-node1-installer /]# ceph orch host add ceph-vpap-81-bmunv8-node2 10.0.67.137 crash mgr mon osd alertmanager node-exporter Error EINVAL: check-host failed: Traceback (most recent call last): File "/usr/lib64/python3.6/runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) File "/usr/lib64/python3.6/runpy.py", line 85, in _run_code exec(code, run_globals) File "/var/lib/ceph/6a3afba0-fe47-11ef-a55c-fa163ee59147/cephadm.60ed76ae9fff5863897f3db3904e7408a6cbb3e7059b72fbb40aa12e28166a5f/__main__.py", line 171, in <module> File "/var/lib/ceph/6a3afba0-fe47-11ef-a55c-fa163ee59147/cephadm.60ed76ae9fff5863897f3db3904e7408a6cbb3e7059b72fbb40aa12e28166a5f/cephadmlib/daemons/__init__.py", line 8, in <module> File "/var/lib/ceph/6a3afba0-fe47-11ef-a55c-fa163ee59147/cephadm.60ed76ae9fff5863897f3db3904e7408a6cbb3e7059b72fbb40aa12e28166a5f/cephadmlib/daemons/smb.py", line 1, in <module> ModuleNotFoundError: No module named 'dataclasses' Scenario: Admin node - RHEL 9 Other node - RHEL 8 Version-Release number of selected component (if applicable): ============================================================= ceph 19.2.1-26 How reproducible: ================= Always Steps to Reproduce: =================== 1. Bootstrap CEPH 8.1 cluster with RHEL 9 as the admin node 2. Add RHEL 8.x host to the cluster using "ceph orch host add" command 3. Actual results: =============== As seen in description Expected results: ================= Add host should succeed Additional info: ================ This failure is observed for build version "19.2.1-26" and up. The test was passing for previous versions.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Important: Red Hat Ceph Storage 8.1 security, bug fix, and enhancement updates), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2025:9775