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https://issues.apache.org/jira/browse/HADOOP-2409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12589202#action_12589202
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Steve Loughran commented on HADOOP-2409:
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the ideal way to do this is by releasing hadoop for EC2 as RPMs, and have a yum
server on S3. Anyone who forks your image can still keep hadoop up to date, and
the normal key work handles security.
> Make EC2 image independent of Hadoop version
> --------------------------------------------
>
> Key: HADOOP-2409
> URL: https://issues.apache.org/jira/browse/HADOOP-2409
> Project: Hadoop Core
> Issue Type: Improvement
> Components: contrib/ec2
> Reporter: Tom White
> Attachments: HADOOP-2409.patch
>
>
> Instead of building a new image for each released version of Hadoop, install
> Hadoop on instance start up. Since it is a small download this would not add
> significantly to startup time. Hadoop releases would be mirrored on S3 for
> scalability (and to avoid bandwidth costs). The version to install would be
> found from the instance metadata - this would be a download URL.
> More generally, the instance could retrieve a script to run on start up from
> a URL specified in the metadata. The script would install and configure
> Hadoop, but it could be extended to do cluster-specific set up.
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