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https://issues.apache.org/jira/browse/AMBARI-2277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Nettleton updated AMBARI-2277:
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Fix Version/s: (was: 2.1.0)
2.1.1
> Improve host checking on registration
> -------------------------------------
>
> Key: AMBARI-2277
> URL: https://issues.apache.org/jira/browse/AMBARI-2277
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 1.2.4
> Reporter: Sumit Mohanty
> Assignee: Sumit Mohanty
> Fix For: 2.1.1
>
>
> Host registration commonly fails on two scenarios:
> 1) Agent machine can't make it back to Server (results in failed host
> register because Server never sees host register)
> 2) Agent machine registers with Server under a _different_ hostname than
> Server expected (results in failed register because Server thinks host never
> registered)
> Need to consider how to make these scenarios 1) easier to troubleshoot 2)
> more clear to the user 3) provide paths out of this situation (warn, retry,
> remove)
> One limiting factor we have during registration currently is that we are
> assuming a hostname matches up. One (possible) way to alleviate this can be
> to provide a context, which can be any random string, that we send to the
> host which is returned during the registration call. If we can somehow match
> the context with what the host provides, we can then offer some meaningful
> warnings if there is a hostname mismatch.
> We would have to do this BEFORE saving the hostname in the database.
> Such a mechanism cannot block registration because, for example, we offer
> custom host name scripts from the agent. In that case, either a) the
> hostnames will match up anyway because registration is manual at that point
> or b) the user knows what he's doing and can just skip past it.
> FE should consider reporting the unmatched host names along with hosts that
> failed to register. This will make it easy to debug the issue.
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