FYI, Using ECR with Docker Swarm is something we did try. It was hellish. We never nailed down the exact problems, but we spent about a month with 2-3 experienc

FYI, Using ECR with Docker Swarm is something we did try. It was hellish. We never nailed down the exact problems, but we spent about a month with 2-3 experienced engineers trying to fix the edge case issues. The main issue was ECR has a slightly different authentication model than docker swarm. The whole '--with-registry-auth' only partially works when you are using ECR. Unfortunately, it works just enough that you think it's working, until all your tokens time out and a worker can suddenly no longer pull an image. Our common failure case was an image becoming unhealthy or a node being drained. When that image would try to be restarted on a different worker, if that worker did not have the image it would try to get it from the registry. If the tokens were expired it would fail. The only "fix" we ever found was to setup a cron job that forcibly deployed a new version of a "replicated globally" image every X minutes (where X was based on ECR token expiration). It kind of worked, but we still had occasional failures we could not identify. I wish it worked better, because it was nice to use ECR. Frankly token expiration sounds much more secure too, but without direct support for token refresh inside the docker engine it's just hard to get everything to work