Although I did search the list for prior posting regarding the issue I had, I finally came
across a thread which addressed this issue. In short, updating Ceph to 18.2.2 resolved
this issue.
The first issue was - as I initially suspected, caused by mgr to perform a verification on
the SSL certs presented to it. Once I disabled that using
ceph dashboard set-rgw-api-ssl-verify false
I was presented with another error, which was then resolved by the Ceph upgrade:
Mär 25 10:47:25 bceph01 conmon[260644]: ValueError: invalid literal for int() with base
10: '9443 ssl_certificate=config://rgw/cert/rgw.rgw.JVM.GH79'