Ask HN: Public info on datacenter management systems?

I know that Microsoft[1] and Google[2] have public docs explaining some of the technology they use to manage data centers. I have heard from word of mouth that Apple and Amazon have similar systems. Is there any public info on this? I wasn't able to find anything, but might be reaching for the wrong things. Or maybe the info is just not available externally. I'm curious to learn more about the topic.

Thanks for the help!

[1]: https://dl.acm.org/citation.cfm?id=1243426 [2]: https://dl.acm.org/citation.cfm?id=2741964