[jira] [Created] (AMBARI-7072) Metadata information exposed through API

["Janos Matyas (JIRA)" <ji...@apache.org>]

Janos Matyas created AMBARI-7072:
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             Summary: Metadata information exposed through API
                 Key: AMBARI-7072
                 URL: https://issues.apache.org/jira/browse/AMBARI-7072
             Project: Ambari
          Issue Type: New Feature
          Components: contrib
            Reporter: Janos Matyas
            Assignee: Janos Matyas
            Priority: Minor
             Fix For: 1.7.0


We'd like to retrieve metadata information (most of them are already persisted) through the API. We have open sourced a project called Periscope https://github.com/sequenceiq/periscope which brings SLA policy based autoscaling for Hadoop clusters installed with Ambari, and when up and downscaling clusters we need to know certain metadata information listed below - these features we have implemented in Periscope but would like to add in Ambari API, REST client and shell:

1. Ability to know the host-hostgroup relationship - from both directions
2. Ability to know the services/components-host/hostgroup relationship - from both directions
3. Ability to know the blueprint-cluster(s) relationship
4. Once Slider is supported, keep and retrieve the Slider apps related metadata






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