development, many pieces are not in place. No such features available as of yet. Security is in nascent stages. Containerization Resource Heavy Slow startup and shutdown time More Stable and robust tools available. Live Migration and efficient snapshotting. Tighter Security Guarantees Virtualization Resource Isolation
Linux namespaces (isolated view of system) Cgroups (limit and isolate the resource usage) Union Filesystem (AUFS, overlayfs) Docker Concepts Dockerfile and Docker images Docker runtime Docker volumes What is Docker ?