Docker Swarm 0.2.0
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The document introduces Docker Swarm, a clustering system that allows multiple Docker engines to be managed as a single entity, highlighting its functionality, resource management capabilities, and the ease of getting started. It outlines features such as advanced scheduling, node management, and custom constraints, along with its upcoming integration with various backends and high availability options. The document also includes key commands for creating and managing clusters, as well as an invitation for community contributions.
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?