Using Docker Containers in Docker Clusters

A lot of cloud providers are heavily promoting moving to newer instance types now, which are going to be running on du cpeus. K logan says he runs a few docker containers, gitter drone and miny flux, that require a date base post gress. This post gress data base is on a separate v m host from the docker containers. It gives me one central place to manage my data bases. Would commend instead putting a separate post gress container on the same stack as each docker application.