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Mount CIFS with DFS with Kerberos authentication inside container

Hello all,
I hope you can help. I would like to mount a DFS share within my Ubuntu container via CIFS with Kerberos authentication.

I’ve run it on an Ubuntu VM all the way and it works fine there, but I can’t get it to work inside my container with the same packages installed + --privilleged option on the ubuntu container.

I suspect there is something wrong with the kernel or something. I get the message CIFS: VFS: Kerberos negotiated but upcall support disabled!

When I look in my working VM I see several CIFS parameters, which I cannot find within the docker container.

Can you help?