Understanding Docker Swarm Mode

Talk I gave at the Athens Docker Meetup on Docker's new SwarmKit, Docker Swarm mode and how you can use it to orchestrate containers in your infrastructure. http://www.meetup.com/Docker-Athens/events/234638645/

Transcript

1. UNDERSTANDING DOCKER SWARM ANTONIS KALIPETIS - @AKALIPETIS
2. ANTONIS KALIPETIS @AKALIPETIS ▸ Docker Captain and early user ▸ Python lover and developer ▸ Technology lead at SourceLair / stolos.io I love automating stuff and sharing knowledge around all things containers, DevOps and optimizing developer workflows.
3. UNDERSTANDING DOCKER SWARM AGENDA ▸ Docker: a brief intro ▸ [Classic] Docker Swarm ▸ Orchestrating the ‘ SwarmKit and Docker Swarm Mode ▸ Services ▸ DAB Files ▸ Demo time!
4. CLOUD AN OPERATING SYSTEM FOR ΤΗΕ
6. THE DOCKER ENGINE ANATOMY OF THE ENGINE runc - low level plumbing dockerd - Docker Daemon docker - Docker Client
7. THE NEED FOR MANAGING A BUNCH CONTAINERS DOCKER COMPOSE ▸ Containers need special configuration, depending on the actual application ▸ Containers need to connect with each other in a semantic way ▸ Containers have dependencies
8. [CLASSIC] SWARM
9. Docker CLI Docker Hub Token service etcd consul zookeeper Machine discovery libkv
10. UPS AND DOWNS [CLASSIC] SWARM ▸ 100% compatible with the Docker API ▸ Compatible with Docker Compose ▸ Hard to scale model ▸ First take on multi-host networking ▸ Volume management across a cluster ▸ Missing high-level orchestration concepts
11. SWARMKIT AND DOCKER SWARM MODE
12. SAY HELLO TO DOCKER NATIVE ORCHESTRATION DOCKER SWARM MODE ▸ Secure by default ▸ Integrated load balancing and service discovery ▸ High-level orchestration concepts ▸ Backwards compatible
13. ANATOMY OF THE SWARM DOCKER SWARM CLUSTER ARCHITECTURE Manager Manager Manager Worker Worker Worker Worker Worker Worker Worker Internal Distributed State Store
14. UNDERSTANDING DOCKER SWARM DESIGN PRINCIPLES ▸ Push (vs pull) model ▸ Integrated data store ▸ Highly available ▸ Orchestrating least privilege ▸ Integrated CA and certificate rotation
15. UNDERSTANDING DOCKER SWARM SERVICES ▸ Declarative definition of desired state ▸ Replicas ▸ Global vs replicated ▸ Deploy / restart strategies ▸ Health checks ▸ docker service create [OPTIONS] IMAGE [COMMAND] [ARG...]
16. UNDERSTANDING DOCKER SWARM TASKS ▸ The actual end-result ▸ Created from services ▸ Scheduled to nodes
17. UNDERSTANDING DOCKER SWARM [EXPERIMENTAL] DOCKER STACKS AND DISTRIBUTED APPLICATION BUNDLES ▸ Create from existing Docker Compose files ▸ Verify image checksums ▸ Perfect for production parity safety ▸ Rolling updates of services docker deploy [OPTIONS] STACK Manage DAB files: https://github.com/mantika/whaleprint
18. DEMO TIME!
19. THANKS ANTONIS KALIPETIS - @AKALIPETIS