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https://issues.apache.org/jira/browse/WHIRR-214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995053#comment-12995053
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Tom White commented on WHIRR-214:
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> Is there a way to rebuild instance templates based on the current cluster
> states (instead of configuration)
When a cluster is started it writes the list of instances (including roles) to
~/.whirr/<cluster-name>/instances. You could use this to get the cluster
status. Also, when the cluster is changed this file should be updated. (It
might be nice to make this pluggable, but this probably belongs to another
issue.)
> Add nodes to running clusters
> -----------------------------
>
> Key: WHIRR-214
> URL: https://issues.apache.org/jira/browse/WHIRR-214
> Project: Whirr
> Issue Type: New Feature
> Reporter: Elliott Clark
>
> I would like to be able to add a node to a running cluster.
> For example if I have created a hadoop, hbase, zookeeper cluster I would like
> to be able to add region servers to hbase, Zookeeper nodes to the quorum,
> and task nodes to hadoop.
> Something akin to the functionality of the hbase-ec2 script. Where if I
> launch a node on an already running cluster. It is configured to join the
> cluster.
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