Sunil G commented on YARN-2786:

Hi [~gp.leftnoteasy] This will be a very useful command set :)

I have some inputs 

1. Could we get the node id/host associated with a specific node-label. Like 
"--listMappings  --labelName GPU"
2. May be a comma separated input for --nodeId, multiple node output can be 
seen in one command.

> Create yarn node-labels CLI to enable list node labels collection and node 
> labels mapping
> -----------------------------------------------------------------------------------------
>                 Key: YARN-2786
>                 URL: https://issues.apache.org/jira/browse/YARN-2786
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, client, resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
> With YARN-2778, we can list node labels on existing RM nodes. But it is not 
> enough, we should be able to: 
> 1) list node labels collection 
> 2) list node-to-label mappings even if the node hasn't registered to RM.
> The command should start with "yarn node-labels ..."

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