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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (WHIRR-604) Non-resolvable hostnames should be reset to something resolvable
Date Tue, 14 Aug 2012 13:30:38 GMT

    [ https://issues.apache.org/jira/browse/WHIRR-604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434111#comment-13434111
] 

Tom White commented on WHIRR-604:
---------------------------------

This is a definite improvement over the current code, even if it's not Adrian's more general
approach. Adrian - are you OK with this approach for the time being?

One small thing I noticed - the order of the arguments in the JUnit asserts is wrong - it
should be {{assertEquals(expected, actual)}}. Worth adding a message too.
                
> Non-resolvable hostnames should be reset to something resolvable
> ----------------------------------------------------------------
>
>                 Key: WHIRR-604
>                 URL: https://issues.apache.org/jira/browse/WHIRR-604
>             Project: Whirr
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.7.1
>            Reporter: Andrew Bayer
>            Assignee: Adrian Cole
>             Fix For: 0.8.0
>
>         Attachments: WHIRR-604.patch, WHIRR-604.patch, WHIRR-604.patch
>
>
> So we currently have a hack in core/src/main/resources/functions/configure_hostnames.sh
to reset the instance hostname on Rackspace to a-b-c-d.static.cloud-ips.com, since the hostname
on the instance that Rackspace uses either isn't resolvable at all or isn't resolvable externally
(not 100% sure which is the case there - I think they're just not resolvable). This logic
should be generalized, since there are other providers where this is the case, and it's also
an issue with, say, something like a private Cloudstack install.
> What seems to make sense is to add a property - something like whirr.ip-hostname-domain
- and to add a check if we can actually resolve the instance's hostname from anywhere but
that particular instance (since the very fact of it being in /etc/hostname means it'll be
resolvable locally). If not, set the hostname to a-b-c-d.${whirr.ip-hostname-domain}, with
logic in Java somewhere to have a mapping of known provider->ip hostname domains for cases
like Rackspace, so that whirr.ip-hostname-domain doesn't need to be set explicitly in those
cases.

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