You could use port-forwarding to dump the DB directly onto your Ubuntu machine. kubectl port-forward svc/your-mongo 27017:27017
then for example if you are using docker, the command to dump it looks something like this (run this on your target machine) docker run --rm --name mongodb -v $(pwd):/app --net="host" bitnami/mongodb:latest [MONGODUMP-COMMAND_HERE]
Make sure to check if the uploads in your rocket install are in this dump or if they are on a persistent disk attached to the rocket pod.
I hope this helps.