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https://issues.apache.org/jira/browse/MESOS-2841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14590617#comment-14590617
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James DeFelice commented on MESOS-2841:
---------------------------------------
It sounds like you're advocating for a structure that looks something like:
{code}
message FrameworkInfo {
...
// discovery envelope, a framework metadata warehouse currently
// represented in a super-generic key-value format.
message DiscoveryInfo {
enum Type {
GENERIC = 1;
}
required type Type = 1;
optional labels Labels = 2;
}
repeated discoveryInfo DiscoveryInfo = 13; // or whatever comes next
... // other framework fields
}
{code}
Does that capture the envelope concept? (do we even need a nested Type?)
> 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: Epic
> Reporter: James DeFelice
> Labels: mesosphere
>
> 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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