Ceph » Orchestrator

The current formation of the dashboard urls can result in the url containing a double-slash
When this happens, you see this in the alert manager log

May 12 20:45:20 myserver.ceph.lab conmon[3047303]: level=error ts=2022-05-13T02:45:20.165Z caller=dispatch.go:354 component=dispatcher msg="Notify for alerts failed" num_alerts=2 err="ceph-dashboard/webhook[0]: notify retry canceled due to unrecoverable error after 1 attempts: unexpected status code 404: https://192.168.1.11:8443//api/prometheus_receiver"  

And this in the mgr log

May 12 20:45:10 occldlr750-1.occl208.lab ceph-mgr[1260392]: [dashboard INFO request] [::ffff:192.168.23.11:49470] [POST] [404] [0.003s] [admin] [513.0B] /prometheus_receiver
                                                            FileNotFoundError: [Errno 2] No such file or directory: '/usr/share/ceph/mgr/dashboard/frontend/dist/en-US/prometheus_receiver'
                                                            cherrypy._cperror.NotFound: (404, "The path '/prometheus_receiver' was not found.")
May 12 20:45:20 occldlr750-1.occl208.lab ceph-mgr[1260392]: [dashboard INFO request] [::ffff:192.168.23.11:49470] [POST] [404] [0.003s] [admin] [513.0B] /prometheus_receiver

The issue lies in the way the dashboard_urls are created, since the template uses a path of /api/prometheus_receiver but a service dump from the mgr includes a trailing '/'

Removing the // from the alertmanager config resolves the issue