Github user skonto commented on the issue: https://github.com/apache/spark/pull/20945 @susanxhuynh Unfortunately I cannot unify the APIs even for DC/OS, 1.10.x is different from 1.11.x (https://docs.mesosphere.com/services/spark/2.3.0-2.2.1-2/security/) and code is dependent on this (I played a bit with the DC/OS secret store API), not to mention other APIs out there. This would require a a generic secrets API at the pure mesos level (like in k8s) so I don't see a viable solution for now, unless I manage to restrict access to the TGT in client mode and essentially make it safe.
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