Docker Online Meetup #28: Production-Ready Docker Swarm
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presented by Alexandre Beslic (@abronan) Swarm v1.0 is now ready for running your apps in production! Swarm is the easiest way to run Docker applications at large scale on a cluster. It turns a pool of Docker Engines into a single, virtual Engine. You don’t have to worry about where to put containers, or how they’re going to talk to each other - it just handles all that for you. We’ve spent the last few months tirelessly hardening and tuning it, and in combination with multi-host networking and the new volume system in Docker Engine 1.9, we can confidently say that it’s ready for running your apps in production. In our tests, we’ve been running Swarm on EC2 with 1,000 nodes and 30,000 containers and it keeps on scheduling containers in less than half a second. Not even breaking a sweat! Keep an eye for a blog post soon with the full details. Read more: http://blog.docker.com/2015/11/swarm-1-0/
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Docker Online Meetup #28: Production-Ready Docker Swarm
- 1. @abronan Swarm goes stable and v1.0 with a cute new logo @abronan
- 3. Multiple Docker Engines == Swarm Docker CLI Managers Agents CLI Docker Hub Token service etcd consul zookeeper Simple FileMachine discovery libkv
- 4. 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 Aug 0.4.0 Release Oct 1.0.0 Release
- 5. Swarm in General • Turns a set of Docker Engines into a single pool of resources • Supports the Docker REST API (99%) • Resource management (CPU, Mem, Networking) • Advanced scheduling with constraints and affinities • Multiple Discovery Backends (hub, etcd, consul, zookeeper) • TLS: Encryption & Authentication • Multi Tenancy / Leader Election
- 6. New release highlights • Improved scheduler • Multi-Host Networking - network management, overlay networking (vxlan) • Volume management - using volume plugins - stateful containers, distributed volumes (Ceph, GlusterFS, ZFS/Flocker) • Quality of life improvements - build-time constraints (ARG), unless-stopped restart policy, fixed concurrent pull • Better integration with Compose • More tests / code cleanup / bug fixes
- 7. Production ready • Stable, can be used in production environment • Stress tested on 1000 EC2 nodes • Still lots of improvements to come, on the roadmap for 1.1: - container rebalancing - global scheduling • Rationale: Keep it simple to use/operate. Hear back from users and only include what is wanted/needed by the community - example: networking, build time constraints, etc.
- 9. Multi-Host networking • Announced as part of the experimental release in DockerCon SF June • Now in docker stable! • Allows you to create overlay networks between containers using the vxlan driver • Each container connected to the same overlay network are able to see and discover each other
- 10. $ docker network --help Usage: docker network [OPTIONS] COMMAND [OPTIONS] Commands: rm Remove a network create Create a network connect Connect container to a network disconnect Disconnect container from a network inspect Display detailed network information ls List all networks A wild docker network appears
- 11. Swarm / Networking Docker CLI Managers Agents CLI Docker Hub Token service etcd consul zookeeper Simple FileMachine discovery libkv Overlay networking (vxlan)
- 12. GCE Azure EC2 Digital Ocean node04 node05 node06 node01node02node03 laptop
- 13. GCE Azure EC2 Digital Ocean node04 node05 node06 node01node02node03 laptop
- 14. GCE Azure EC2 Digital Ocean node04 node05 node06 node01node02node03 laptop overlay-1
- 15. GCE Azure EC2 Digital Ocean node04 node05 node06 node01node02node03 laptop app1 app2 db1 app3 db2
- 16. Demo time!
- 17. $ docker volume --help Usage: docker volume [OPTIONS] [COMMAND] Manage Docker volumes Commands: create Create a volume inspect Return low-level information on a volume ls List volumes rm Remove a volume Volume management
- 18. $ docker volume create --name=data data Volume management - example $ docker run -ti -v data:/data alpine /bin/sh -c “echo hello > /data/world” $ docker run -ti -v data:/data alpine cat /data/world hello Create a volume Run a container with the volume Running another container with that volume
- 19. Volume Plugins Docker cluster Ceph cluster create volume yes sure! volume mount
- 20. Better integration with Machine and Compose
- 21. Swarm + Machine + Compose Docker CLICompose Compose Machine .yml Description up / scale / stop/ kill / rm create / destroy