OpenStack is a big complex system which is used for large systems. For most cases Docker is much more practical. But as others have said, what will it be used for. Will you host it yourself? Will you run a mix of OS's? Distributed servers? Size? Uptime constraints? Security? Budget? Schedule? > Someone at my office was wondering about different cloud solutions, and three solutions were considered: Microsoft Azure - Other contacts told him to stay away VMware vRA - Very expensive OpenStack - The remaining option Does anyone use or knows a place where OpenStack is actually implemented -- Sent from my Android device with K-9 Mail. Please excuse my brevity.