I have been using the phusion baseimage-docker. While in the past i’ve been mostly interested in making my docker images as small as possible with images like alpine-linux(busy-box based) the Phusion base breaks from this tradition by encouraging you to run multiple processes from a single container.
While I was wary of this approach initially they make a good argument for it and in practice I have been really enjoying working in this fashion.
- The baseimage-docker uses RUnit rather then upstart and configuring services is well documented and straightforward.
- Cron works as you would expect and its usage isn’t discouraged.
- The container size isn’t tiny but since you have less of them its not a huge factor.
For my project snap-spot I have my app server(http-kit), nginx, new-relic monitoring and a data cleanup task in the same container. For a project of my size this is a good fit and has simplified my deployment,
The ability and convince of grouping processes logically without the overhead of complex docker container orchestration. For small projects this is great.
Finally I don’t find myself constantly
docker exec'ing into a pile of containers because the services can be logically grouped which makes development and maintenance more convenient.