This is five part blog series, and the post on volumes is great explanation of how Docker Swarm really works by Sebastian Caceres. I recommend it even before doing the official Docker Swarm tutorial, to get a peek under the hood.
- How does it work? Docker! Part 1: Swarm general architecture
- How does it work? Docker! Part 2: Swarm networking
- How does it work? Docker! Part 3: Load balancing, service discovery and security!
- How does it work? Docker! Part 4: Control your Swarm!
- How does it work? Docker! Part 5: Get some work(ers) done!
- Kubernetes vs Swarm: Volumes!