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Excerpts from Vladimir Kozhukalov's message of 2014-04-08 03:04:38 -0700:
> Guys, thank you very much for your comments,
> 
> I thought a lot about why we need to be so limited in IPA use cases. Now it
> much clearer for me. Indeed, having some kind of agent running inside host
> OS is not what many people want to see. And now I'd rather agree with that.
> 
> But there are still some questions which are difficult to answer for me.
> 0) There are a plenty of old hardware which does not have IPMI/ILO at all.
> How Ironic is supposed to power them off and on? Ssh? But Ironic is not
> supposed to interact with host OS.

I don't think Ironic should try and manage this at all. If you've no
onboard controller, there are external power switches with network API's
which can be used to power things on and off at the source.