Huh? I feel like this article is missing an example of what kind of operation a Chef run would do that requires coordination between hosts. It's incredibly vague right now, I don't feel like I have enough information to determine whether it's even a good idea for this to happen in Chef.

Like even what the two Curl commands would be in the small example there would be helpful.

Nice. A few years ago we‘ve build something along these lines at Technicolor: https://medium.com/@rad_g/the-ultimate-reactive-infrastructu... I can imagine that our solution wouldn‘t work at facebook scale but for us, it was a massive timesaver, in 300 lines of ruby code.