Alex Heneveld created JCLOUDS-326:
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Summary: Allow Image preference logic to be supplied to
TempalteBuilder
Key: JCLOUDS-326
URL: https://issues.apache.org/jira/browse/JCLOUDS-326
Project: jclouds
Issue Type: Improvement
Components: jclouds-core
Reporter: Alex Heneveld
Priority: Minor
I'd like to tie in to jclouds's TemplateBuilder so that I can use its
filtering/matching capabilities but then use custom logic to determine which of
the matching images is "best" (for my custom value of best, i.e. preferred).
The driving use case is that I want a portable way to say "any recent ubuntu or
centos". Normally this is the default of course but it doesn't always do the
right thing when other options are specified -- broken ubuntu "alpha" images in
AWS being the worst offender (asking for 16gb RAM in us-west-1 gives back an
awful ubuntu 8.04 alpha, for instance!). It would also handle use cases where
someone wants to say "Ubuntu 11 or 12, or CentOS 6.x, is best. failing that,
Ubuntu 10 or CentOS 5.x. (and never any alpha images!)".
I'm thinking allowing to set an `imageSorter(Ordering)`. This fits with how
the TemplateBuilderImpl currently works (it already uses an Ordering, you just
can't change it; and it stays in line with the naming convention of `Sorter` as
in `Ordering hardwareSorter()`.)
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