James DeFelice created MESOS-2841:
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Summary: FrameworkInfo should include a Labels field to support
arbitrary, lightweight metadata
Key: MESOS-2841
URL: https://issues.apache.org/jira/browse/MESOS-2841
Project: Mesos
Issue Type: Improvement
Reporter: James DeFelice
A framework instance may offer specific capabilities to the cluster: storage,
smartly-balanced request handling across deployed tasks, access to 3rd party
services outside of the cluster, etc. These capabilities may or may not be
utilized by all, or even most mesos clusters. However, it should be possible
for processes running in the cluster to discover capabilities or features of
frameworks in order to achieve a higher level of functionality and a more
seamless integration experience across the cluster.
A rich discovery API attached to the FrameworkInfo could result in some form of
early lock-in: there are probably many ways to realize cross-framework
integration and external services integration that we haven't considered yet.
Rather than over-specify a discovery info message type at the framework level I
think FrameworkInfo should expose a **very generic** way to supply metadata for
interested consumers (other processes, tasks, etc).
Adding a Labels field to FrameworkInfo reuses an existing message type and
seems to fit well with the overall intent: attaching generic metadata to a
framework instance. These labels should be visible when querying a mesos
master's state.json endpoint.
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