Display available roles instead of service names when running ./bin/whirr
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Key: WHIRR-195
URL: https://issues.apache.org/jira/browse/WHIRR-195
Project: Whirr
Issue Type: Improvement
Components: cli
Reporter: Andrei Savu
Priority: Minor
Now that service-name is optional I believe that we should display a list of
the available roles (with a small description) instead of service names.
Similar to:
{code}
$ ./bin/whirr
Usage: whirr COMMAND [ARGS]
where COMMAND may be one of:
version Print the version number and exit.
launch-cluster Launch a new cluster running a service.
destroy-cluster Terminate and cleanup resources for a running cluster.
list-cluster List the nodes in a cluster.
Available roles for instances:
nn hadoop name node
jt hadoop job trackers
...
{code}
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