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I'm not sure how to ask it. Is something like OpenStack the same thing as AWS and Azure, except it is Open Source? If I wanted to create an onsite cloud for a Production environment, can OpenStack (or other) be used?

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Generally yes - all of them are large ecosystems of related software products working together to implement "clouds".

There won't be an exact 1:1 mapping for each and every one of their individual products, features and APIs, so don't expect that. But there is a quite significant overlap in capabilities and functionality in general. Just like with the public cloud providers: they're similar to each-other, but not exactly 1:1 compatible.

You (and your customers) will have to learn the specifics of using the desired cloud products in the ecosystem, just like with the other cloud infra providers.

But you'll also need to learn how to install, maintain and operate the infrastructure in general as well as the individual products you're gonna offer, which is something users of the public cloud providers don't need to worry about.

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  • Is OpenStack "on the way out"? Not worth learning? Don't know if I can ask that here, but I was curious.
    – johnny
    Apr 18, 2019 at 15:00
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    Large stakeholders involved and quite active development - definitely not on its way out. Worth learning? - depends on your goals. IMHO yes if large enterprise computing or environments which can't tolerate public cloud are on your list. It's quite a learning curve so public clouds offerings can easily compete from cost perspective at smaller scale.
    – Dan Cornilescu
    Apr 18, 2019 at 16:51
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    Having dabbled with installing OpenStack some years ago, and having extensive experience with AWS, all I can say is I would be weary of trying to build your own cloud infrastructure unless you have a team (six or more) dedicated to building, operating, maintaining, upgrading said infrastructure. Compare this to needing one or two people to manage a moderately sized (hundred or so servers) AWS environment.
    – Joe
    Apr 21, 2019 at 14:30
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Yes

In the cloud theory there 's 3 types of cloud : Public Cloud, Private Cloud and Hybird Cloud

Openstack one kind of the private cloud, the alternative is opennebula and cloudstack

And Azure, AWS and GCP is kind of Public Cloud Service

And the hybird cloud is the cloud that combine 2 of that type of cloud

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