Before it ran on F1/Spanner, Adwords ran on sharded MySQL on Borg. Not for its entire early life, but for quite a few years. Later in life, Checkout and maybe Wallet ran on MySQL on Borg, too. So did YouTube, which used Vitess, a sharding layer (now ported to Kubernetes and open sourced).

Bigtable, Spanner and even Colossus/D run in containers on Borg.

How is colossus running in a container in borg? That's their network file system that makes running databases in containers possible?

There's a bootstrapping issue, of course, but that's how it works.

And it's even crazier than what you're picturing. What if I told you that Bigtable runs on top of Colossus, but Colossus itself stores metadata about files, including Bigtable's files, in... Bigtable? It's really turtles all the way down, the last of which is, luckily, Chubby.

Some of the details here: http://www.pdsw.org/pdsw-discs17/slides/PDSW-DISCS-Google-Ke...

Packaging was (is?) a bit different, because it existed before Docker existed.

Pdf of the presentation: https://www.usenix.org/sites/default/files/conference/protec...

And a recording of the talk: https://www.usenix.org/conference/lisa14/conference-program/...

Googlers, including the ones working on Kubernetes, like to pick on MPM, but that's probably because they haven't run major services deployed from Docker images.