Benjamin Mahler created MESOS-7682:
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Summary: Agent downgrade capability checking.
Key: MESOS-7682
URL: https://issues.apache.org/jira/browse/MESOS-7682
Project: Mesos
Issue Type: Improvement
Reporter: Benjamin Mahler
It would be great if the agent could prevent a downgrade if it reaches a point
where a capability becomes required but the downgraded agent does not have the
capability.
For example, consider the case that an agent starts writing refined
reservations to disk (per the RESERVATION_REFINEMENT capability). At this
point, the RESERVATION_REFINEMENT capability becomes required. Ideally, the
agent persists this information into its state, so that if the agent is
downgraded to a pre-RESERVATION_REFINEMENT state, the old agent could detect
that a capability it does not have is required. At this point the old agent
could refuse to start. This would prevent a "buggy" downgrade due to the old
agent mis-reading the checkpointed resources.
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