We had a fun issue with Docker yesterday: suddenly, services in our Swarm did not start, apparently because a config could not be mounted. They were running fin

We had a fun issue with Docker yesterday: suddenly, services in our Swarm did not start, apparently because a config could not be mounted. They were running fine for over two years and nobody had touched anything in the Swarm config. Turned out, AWS had decided to upgrade Docker on the server and that version (20.x) is not able to launch services in the Swarm. We have downgraded to 18 now, which works, but is not a long-term solution.