Hi Robert, 

I tried, but that doesn't work :( 

Using exit maintenance mode results in the error: "missing 2 required 
positional arguments: 'hostname' and 'addr'" 
But running the command a second time, it looks like it works, but then I get 
errors with starting the containers. The start up fails because it can't pull 
the container image because authentication is required (our instance is offline 
and we're using a local image registry with authentication). 

Kind regards, 
Sake 
> Op 04-06-2024 14:40 CEST schreef Robert Sander <r.san...@heinlein-support.de>:
> 
>  
> Hi,
> 
> On 6/4/24 14:35, Sake Ceph wrote:
> 
> > * Store host labels (we use labels to deploy the services)
> > * Fail-over MDS and MGR services if running on the host
> > * Remove host from cluster
> > * Add host to cluster again with correct labels
> 
> AFAIK the steps above are not necessary. It should be sufficient to do these:
> 
> * Set host in maintenance mode
> * Reinstall host with newer OS
> * Configure host with correct settings (for example cephadm user SSH key etc.)
> * Unset maintenance mode for the host
> * For OSD hosts run ceph cephadm osd activate
> 
> Regards
> -- 
> Robert Sander
> Heinlein Consulting GmbH
> Schwedter Str. 8/9b, 10119 Berlin
> 
> https://www.heinlein-support.de
> 
> Tel: 030 / 405051-43
> Fax: 030 / 405051-19
> 
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