####Security
- TLS authentication
####Scheduler
- Persistent state storage
- Virtual Container ID
- Rebalancing
- Affinity constraints & improved constraints expression (==, !=, regular expressions)
- Global scheduling (schedule containers on every node)
####Multi-tenancy
- Master election
- Shared state
####API Matching
- Bring Swarm API on par with Docker API as much as possible
- Support for
docker attach(interactive sessions)
####Extensibility
- Pluggable scheduler
- Discovery backends
- etcd
- zookeeper
- consul
- hub
- file