[jira] [Work started] (KNOX-2530) Support qualifying service params for CM discovery control

["Philip Zampino (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KNOX-2530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on KNOX-2530 started by Philip Zampino.
--------------------------------------------
> Support qualifying service params for CM discovery control
> ----------------------------------------------------------
>
>                 Key: KNOX-2530
>                 URL: https://issues.apache.org/jira/browse/KNOX-2530
>             Project: Apache Knox
>          Issue Type: Improvement
>          Components: cm-discovery
>    Affects Versions: 1.5.0
>            Reporter: Philip Zampino
>            Assignee: Philip Zampino
>            Priority: Major
>             Fix For: 1.6.0
>
>
> Add support for discovery-only service params in descriptor service declarations, such that the ClouderaManager discovery process can be controlled for HA and other deployments where there are multiple sources of endpoint information that should not be combined for a given topology.
> One example is HDFS HA, where a nameservice can be specified. (Similar support for this exists for Ambari discovery)
> {noformat}
> {
>   "discovery-type":"ClouderaManager",
>   "discovery-address":"https://cm-host:7183",
>   "discovery-user":"admin",
>   "discovery-pwd-alias":"cm.discovery.pwd",
>   "provider-config-ref":"pam",
>   "cluster":"Cluster 1",
>   "services":[
>     {
>       "name":"WEBHDFS",
>       "params": {
>         "discovery-nameservice":"ns2"
>       }
>     }
>   ]
> }{noformat}
> Another example is a cluster with multiple SOLR instances.
> {noformat}
> {
>   "discovery-type":"ClouderaManager",
>   "discovery-address":"https://cm-host:7183",
>   "discovery-user":"admin",
>   "discovery-pwd-alias":"cm.discovery.pwd",
>   "provider-config-ref":"pam",
>   "cluster":"Cluster 1",
>   "services":[
>     {
>       "name":"SOLR",
>       "params": {
>         "discovery-service-display-name":"SOLR-1"
>       }
>     }
>   ]
> }{noformat}
> These discovery-only service parameters are prefixed with *discovery-*, and must not manifest in the generated topologies.
>  



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