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From "Andrew Bayer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCLOUDS-450) Support min/max count and client token fields for AWS EC2 RunInstances
Date Tue, 04 Feb 2014 16:58:09 GMT
Andrew Bayer created JCLOUDS-450:
------------------------------------

             Summary: Support min/max count and client token fields for AWS EC2 RunInstances
                 Key: JCLOUDS-450
                 URL: https://issues.apache.org/jira/browse/JCLOUDS-450
             Project: jclouds
          Issue Type: Improvement
          Components: jclouds-compute
            Reporter: Andrew Bayer
            Assignee: Andrew Bayer
             Fix For: 1.8.0


AWS's RunInstances API method (http://docs.aws.amazon.com/AWSEC2/latest/APIReference/ApiReference-query-RunInstances.html)
allows for specifying minimum and maximum count - if given, you'll get at least the minimum
number and no more than the maximum, unless the minimum is greater than the number of instances
you can launch in that AZ/region (say, if you've already got enough instances of a size that's
got a per-region limit such that creating min count more would push over the limit), in which
case you don't get any. It'd be nice to support this, both to simplify multiple instance creation
(rather than X separate calls to RunInstances, just one...) and to take advantage of the behavior
if you try to launch more than you can.

As well, we should have some form of support for RunInstances' idempotency - see http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Run_Instance_Idempotency.html
- if you pass a client token to the call, each subsequent call with the same arguments (including
the client token) will return the same response, only varying in the HTTP response code. So
you can keep making the same call (say, with a > 1 min count) until you get a terminating
response.



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