Centurion vs Flocker: What are the differences?

Developers describe Centurion as "A mass deployment tool for Docker fleets". A deployment tool for Docker, made by New Relic. Takes containers from a Docker registry and runs them on a fleet of hosts with the correct environment variables, host volume mappings, and port mappings. Supports rolling deployments out of the box, and makes it easy to ship applications to Docker servers. New Relic is using it to run their production infrastructure. On the other hand, Flocker is detailed as "Run your databases in Docker and make them as portable as the rest of your app". Flocker is a data volume manager and multi-host Docker cluster management tool. With it you can control your data using the same tools you use for your stateless applications. This means that you can run your databases, queues and key-value stores in Docker and move them around as easily as the rest of your app.

Centurion and Flocker can be primarily classified as "Container" tools.

Centurion and Flocker are both open source tools. It seems that Flocker with 3.19K GitHub stars and 287 forks on GitHub has more adoption than Centurion with 1.72K GitHub stars and 111 GitHub forks.