Endpoint for API calls against the master.
Returns 200 OK when the request was processed successfully.
Returns 307 TEMPORARY_REDIRECT redirect to the leading master when current master is not the leader.
Returns 503 SERVICE_UNAVAILABLE if the leading master cannot be found.
This endpoint requires authentication iff HTTP authentication is enabled.
The information returned by this endpoint for certain calls might be filtered based on the user accessing it. For example a user might only see the subset of frameworks, tasks, and executors they are allowed to view. See the authorization documentation for details.