This seems to be a busy space. I’m trying to catch up and understand how these all relate.

See also the blurring line between PaaS and Iaas, the PaaS Cheatsheet, a huge Spreadsheet.

This image helped me understand the layers involved:

• OpenShift Origin
• CloudFoundry
• Solumn – Like a native PaaS module for OpenStack?
• ActiveState stackato – built on top of CloudFoundry
• JuJu
• Tsuru

Docker-related

• Flynn
• Deis: Seems like an extended dokku; deploys apps from git, not so much focused on backing services.
• Gilliam: Runs a service on the host, per-project YAML file and command line client to deploy, can run backing services.
• maestro-ng: Will setup docker containers based on a YAML
• Flynn

Other

• Velociraptor: Deploys multiple apps on the same host without virtualization.
  openstack