<!-- Please do *NOT* ask usage questions in Github issues. If your issue is not a feature request or bug report use: https://groups.google.com/forum/#!forum/prometheus-users. If you are unsure whether you hit a bug, search and ask in the mailing list first. You can find more information at: https://prometheus.io/community/ --> We should publish a docker image with a v2 tag, so people can chose to stick to that one. Currenly, they can chose a latest (which will break in 3.x) or a very specific v1.2.3 tag.