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We've even done later versions of keystone with older versions of other stuff (Specifically Kilo Keystone with Juno Glance/Heat and Icehouse everything else)... 

The thing I'd watch out for going the other direction is if the newer version of, let's say, nova, requires API calls which aren't present in your older version of Keystone. I can't think of any specific calls off the top of my head, but that'd be the only major read flag which comes to mind.



On 1/5/16, 10:50 PM, "Abel Lopez" <alopgeek at gmail.com> wrote:

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>
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>We've done things like Icehouse keystone and Juno glance/heat/ceilometer. 
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>Seems like having older keystone is somewhat safe. 
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>On Tuesday, January 5, 2016, Marcus Furlong <furlongm at gmail.com> wrote:
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>Hi,
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>Just wanted to check if it's possible to have a mixed version
>environment with kilo keystone and e.g. liberty nova.
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>Has anyone done this? Any gotchas?
>
>Regards,
>Marcus.
>--
>Marcus Furlong
>
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