Re: Error on Ceph Dashboard

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Hi Ernesto – I couldn’t register for an account there, it was giving me a 503, but I think the issue is the deployed container. I managed to clean it up, but not 100% sure of the cause – I think it is the referenced, container – all of the unit.run files reference docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949<mailto:docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949> but I don’t see that sha digest against the ceph/ceph:v16.2.4 in docker.
To clean it up I did the following (assume servers are named a,b,c)
On each server, I ran podman pull docker.io/ceph/ceph:v16.2.4

On server a, which was running the manager, I did

ceph orch apply mon --placement='a.domain’
ceph orch apply mgr --placement='a.domain’


I didn’t expect any immediate miracles, but just wanted to isolate the issue.  However when I did this, the dashboard started working again.  I then redeployed mgr and mon to all 3 servers, and things are back up

I then did applied the mon and mgr to all servers
ceph orch apply mon --placement='a.domain,b.domain, c.domain’
ceph orch apply mgr --placement='a.domain,b.domain, c.domain’

Things still worked,
So I removed a from the servers (to reset it)
ceph orch apply mon --placement='b.domain, c.domain’
ceph orch apply mgr --placement='b.domain, c.domain’

Finally to get all 3 back up:
ceph orch apply mon --placement='a.domain,b.domain, c.domain’
ceph orch apply mgr --placement='a.domain,b.domain, c.domain’


And I am up and running,
I am thinking the pull of the docker.io:/ceph/ceph:v16.2.4 is what did it- because there was a module downloaded on each server.  So I am not 100% sure the sha digest tag matches 16.2.4, but it is working again.

Thanks,
Rob

p.s. I do have an extracted image of the container before I did all of this if that would help.


From: Ernesto Puerta <epuertat@xxxxxxxxxx>
Sent: Thursday, June 10, 2021 2:44 PM
To: Robert W. Eckert <rob@xxxxxxxxxxxxxxx>
Cc: ceph-users <ceph-users@xxxxxxx>
Subject: Re:  Error on Ceph Dashboard

Hi Robert,

I just launched a 16.2.4 cluster and I don't reproduce that error. Could please file a tracker in https://tracker.ceph.com/projects/dashboard/issues/new and attach the mgr logs and cluster details (e.g.: number of mgrs)?

Thanks!

Kind Regards,
Ernesto


On Thu, Jun 10, 2021 at 4:05 AM Robert W. Eckert <rob@xxxxxxxxxxxxxxx<mailto:rob@xxxxxxxxxxxxxxx>> wrote:
Hi - this just started happening in the past few days using Ceph Pacific 16.2.4 via cephadmin (Podman containers)
The dashboard is returning

No active ceph-mgr instance is currently running the dashboard. A failover may be in progress. Retrying in 5 seconds...

And ceph status returns

  cluster:
    id:     fe3a7cb0-69ca-11eb-8d45-c86000d08867
    health: HEALTH_WARN
            Module 'dashboard' has failed dependency: cannot import name 'AuthManager'
            clock skew detected on mon.cube

  services:
    mon: 3 daemons, quorum story,cube,rhel1 (age 46h)
    mgr: cube.tvlgnp(active, since 47h), standbys: rhel1.zpzsjc, story.gffann
    mds: 2/2 daemons up, 1 standby
    osd: 13 osds: 13 up (since 46h), 13 in (since 46h)
    rgw: 3 daemons active (3 hosts, 1 zones)

  data:
    volumes: 1/1 healthy
    pools:   11 pools, 497 pgs
    objects: 1.50M objects, 2.1 TiB
    usage:   6.2 TiB used, 32 TiB / 38 TiB avail
    pgs:     497 active+clean

  io:
    client:   255 B/s rd, 2.7 KiB/s wr, 0 op/s rd, 0 op/s wr

The only thing that has happened on the cluster was one of the servers was rebooted.  No configuration changes were performed

Any suggestions?

Thanks,
rob
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