I also work in HFT, and I also attempted to use Docker in production and encountered all sorts of problems (different from what are described in this article, though).
However, as it turned out, these problems had nothing to do with Docker. Containerization is a great idea, and Docker's approach is sane (one container per service — fine).
The offender was docker-swarm. Like many others, I chose it as the default container management approach (it is written by the same team, so it should work the best, right? Wrong.) Docker-swarm is indeed buggy and not ready for production, or at least it wasn't 10 months ago. And if you use "one container per service" approach, orchestrating large groups of containers is a necessity.
Then I discovered Kubernetes, and became significantly happier. It's not without its own set of quirks, but it orders of magnitude smoother experience compared to docker-swarm. And it works with AWS just fine. (I didn't get to use DCOS, but I heard some nice things about it, too).
Tl;dr the source of all "Docker is not ready for production" rants seems to be docker-swarm, at least from my experience. Use Kubernetes or DCOS and everything will be so much better.
However, as it turned out, these problems had nothing to do with Docker. Containerization is a great idea, and Docker's approach is sane (one container per service — fine).
The offender was docker-swarm. Like many others, I chose it as the default container management approach (it is written by the same team, so it should work the best, right? Wrong.) Docker-swarm is indeed buggy and not ready for production, or at least it wasn't 10 months ago. And if you use "one container per service" approach, orchestrating large groups of containers is a necessity.
Then I discovered Kubernetes, and became significantly happier. It's not without its own set of quirks, but it orders of magnitude smoother experience compared to docker-swarm. And it works with AWS just fine. (I didn't get to use DCOS, but I heard some nice things about it, too).
Tl;dr the source of all "Docker is not ready for production" rants seems to be docker-swarm, at least from my experience. Use Kubernetes or DCOS and everything will be so much better.