Docker Swarm 0.2.0
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Swarm in a nutshell • Exposes several Docker Engines as a single virtual Engine • Serves the standard Docker API • Extremely easy to get started • Batteries included but swappable
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Docker Swarm 0.2.0
- 1. Introduction to Swarm a Docker-native clustering system @aluzzardi - @vieux - @abronan
- 6. Swarm in a nutshell • Exposes several Docker Engines as a single virtual Engine • Serves the standard Docker API • Extremely easy to get started • Batteries included but swappable
- 7. Timeline Oct Nov Dec Jan Feb Jun Proof of Concept DockerCon EU Open Repository First Release Candidate Swarm Beta Release Global Hack Day Open Proposal 0.2.0 Release 0.3.0 Release Apr
- 8. Swarm 0.2.0 • Docker REST API (>85%) • Resource management (CPU, Mem, Networking) • Advanced scheduling with constraints and affinities • Multiple Discovery Backends (hub, etcd, consul, zookeeper) • TLS: Encryption & Authentication
- 9. Setup using the hosted discovery service • Create a cluster: $ swarm create • Add nodes to a cluster: $ swarm join --add=<node_ip> token://<token> • Start Swarm $ swarm manage --addr=<swarm_ip> token://<token> Or you can use your own etcd, zookeeper or consul Contributions are welcome ☺ :
- 10. Swarm Scheduler 2 steps: • 1- Apply filters to exclude nodes - ports - constraints - affinity - health - dependency • 2- Use a strategy to pick the best node - binpack - spread - random Contributions are welcome ☺ :
- 11. Resource Management • Memory $ docker run -m 1g … • CPU $ docker run -c 1 … • Ports $ docker run -p 80:80 … • More to come, ex: network interfaces
- 12. Constraints • Standard constraints induced from docker info docker run -e “constraint:operatingsystem==*fedora*” … docker run -e “constraint:storagedriver==*aufs*” … • Custom constraints with host labels docker -d --label “region==us-east” docker run -e “constraint:region==us-east” … • Pin a container to a specific host docker run –e “constraint:node==ubuntu-2” …
- 13. Affinities • Containers affinities docker run --name web nginx docker run -e “affinity:container==web” logger • Containers Anti-affinities docker run --name redis-master redis docker run --name redis-slave -e “affinity:container!=redis*” … • Images affinities docker run -e “affinity:image==redis” redis
- 14. Soft Affinities • Containers soft affinities docker run -d --name redis5 -e affinity:container!=~redis* redis
- 15. Swarm Beta: Integrations • Fully integrated with Machine $ machine create -d azure --swarm --swarm-discovery token://<token> … • Partially integrated with Compose $ DOCKER_HOST=<swarm_addr> compose up • Mesos & DCOS integration has started in collaboration with Mesosphere. $ swarm manage -c mesos zk://<zookeeper_addr>/swarm
- 16. Demo Scheduling containers on Swarm
- 17. Demo hdd ssd Docker CLI Docker CLI= RAM: 4GB CPU: 1core Swarm us-east us-west
- 18. Swarm Beta: Upcoming features • Support for K/V backends (consul, etcd, zookeeper) • High Availability with replicated state between multiple Managers • Attempt at Re-scheduling on Node failure • Networking (libnetwork integration into docker)
- 22. High Availability, State replication
- 28. Manager backup instances Docker CLI Manager Backup Manager Failure Swap
- 30. Mesos cluster + + + Mesos CLI Marathon
- 31. Mesos cluster + Docker Swarm + + + Docker CLI Mesos CLI Marathon
- 32. Mesos cluster + Docker Swarm + + + Docker CLI Mesos CLI Docker Compose Marathon
- 33. http://github.com/docker/swarm #docker-swarm on freenode @aluzzardi - @vieux - @abronan Thank You. Questions?