Clocker - The Docker Cloud Maker
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This document provides an overview and demonstration of Clocker, an open source tool for managing Docker clouds and deploying composite applications on Docker. It discusses Clocker's components including its use of Brooklyn for application management and jclouds for provisioning. It also covers Clocker's features such as container placement strategies, networking using Weave, and roadmap items like support for Docker Swarm and improved networking.
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Clocker - The Docker Cloud Maker
- 1. Clocker The Docker Cloud Maker
- 2. Clocker The Docker Cloud Maker Andrew Kennedy @grkvlt
- 3. @grkvlt Introduc/on • Andrew Kennedy – So6ware Engineer – Open Source and Distributed Systems – github.com/grkvlt • Cloudso6 Corpora/on – Open Source Applica/on Management Specialists – We’re Hiring…
- 4. @grkvlt Agenda • Overview • Components • Deep Dive • Demonstra/on • Roadmap
- 6. @grkvlt What does it do? 1. Spins up and Manages Docker Clouds 2. Serves up Containers on Demand 3. Manages Composite Applica/on Deployments on Docker
- 7. @grkvlt What does it provide? • Mul/ Host and Mul/ Container Applica/ons • Seamless Networking – Communica/on Between Services • Orchestra/on and Clustering – Control of Containers – Container Management
- 8. @grkvlt Who is using it? • Tes/ng and Proof of Concept Stage – Financial Services – Insurance • Produc/on – Mul/-‐tenant Applica/on Trial – Container per service – Via IBM BlueMix
- 9. @grkvlt Where can I find it? • Open Source • Apache 2.0 Licensed • hZp://clocker.io • Status • 0.7.0 Beta Release • 0.8.0-‐SNAPSHOT Development
- 11. @grkvlt Clocker and Brooklyn • What is it? – Brooklyn Applica/on – Brooklyn Loca/on • What does it provide? – First Class Docker Support in Brooklyn – Op/mized Brooklyn Blueprints for Docker
- 12. Apache Brooklyn • Apache Brooklyn – Open Source – Java – Donated to the Apache So6ware Founda/on – ASF Incubator Status
- 13. @grkvlt Apache Brooklyn • Applica/on Management Pla^orm • Deploy, Manage and Monitor Blueprints • Provisioning, Installa/on and Customiza/on • Management – AutoScaling, Resilience, Performance, Security
- 14. Apache jclouds • Java Cloud Library • API Agnos/c – CloudStack, OpenStack, AWS EC2, GCE… • Create Virtual Machines – Return SSH Endpoint – Manage Proper/es
- 15. @grkvlt Apache jclouds • Drivers for REST APIs • Docker Driver – WriZen by @turlinux • Virtual Container – Using SSH Daemon – Same Endpoint Type as VM – Composi/on on any Image or Dockerfile
- 16. @grkvlt Docker Networking 101 • Separate Container Network • RFC 1918 Private Addresses • Non Routable • Bridged to Host • Port Forwarding • Mul/ple Endpoints for Services
- 17. Docker Topology
- 18. @grkvlt So6ware Defined Networking • Overlay Networks • Kernel or User Space • Many Op/ons – Pipework – SocketPlane – Flannel – Open vSwitch – Weave
- 19. Weave Topology
- 20. @grkvlt Weave • Ethernet Switch – User Space – Docker Container • Mesh Topology • Routes TCP Traffic – Sniffs on Host – Forwards over TCP
- 21. Weave
- 25. @grkvlt Clocker Features • Applica/on Deployment – Oasis CAMP YAML Blueprint – TOSCA in Development – Same as Core Brooklyn • Mixed Des/na/ons – Some Virtual Machines – Some Bare Metal – Some Containers
- 26. @grkvlt Clocker Features • Docker Extensions – Container or Image – Placement Strategy – Dockerfiles • Manages Docker – Cloud Deployment – Configura/on – Run/me Control
- 27. @grkvlt Container Management • Sources – Docker Image Defini/on – Docker Hub – Dockerfile – Brooklyn En/ty Defini/on • Create Image Automa/cally – Commit or Push for Reuse
- 28. @grkvlt Container Management • Installa/on of Services – Defined by Brooklyn or Dockerfile – Common to all En/ty Instances • Commit Image – Available for next En/ty • Push Image – Available for all Hosts
- 29. Container Management id: dockerfile-‐mysql name: "Docker Hub MySQL Application" origin: "https://registry.hub.docker.com/_/mysql/" locations: -‐ my-‐docker-‐cloud services: -‐ serviceType: brooklyn.entity.container.docker.application.DockerfileApplication id: mysql name: "MySQL" brooklyn.config: docker.dockerfile.url: "https://s3-‐eu-‐west-‐1.amazonaws.com/brooklyn-‐clocker/mysql-‐5.6.tgz" docker.container.environment: MYSQL_ROOT_PASSWORD: "s3cr3t”
- 30. @grkvlt Container Placement • Demand – Adding an Applica/on – Scaling exis/ng Applica/on • Requirements – Host Loca/on – Service Resources – CPU, Memory
- 31. @grkvlt Container Placement • Supply – Choose a Host from available – Create new Host • Start Container – Set CPU and Memory – AZach to Network
- 32. @grkvlt Container Placement • Placement Strategies – Filter Hosts – Sort Hosts • Informa/on from – Docker – Underlying Machine – Cloud Environment – En/ty or Service
- 33. @grkvlt Container Placement • Placement Strategies – Random, Depth or Breadth First – CPU or Memory Usage – Memory, CPU or Container Limits – Geographic Constraints • User Defined – Java Predicate
- 34. Placement Strategy • Determinis/c • Simple – Predicate and Comparator docker.container.strategies: -‐ $brooklyn:object: type: "brooklyn.location.docker.strategy.MaxContainersPlacementStrategy” brooklyn.config: maxContainers: 16 -‐ $brooklyn:object: type: "brooklyn.location.docker.strategy.CpuUsagePlacementStrategy” brooklyn.config: maxCpu: 0.75
- 35. @grkvlt Container Provisioning • Provisioning Strategy – New Docker Host Loca/on • Constraints – Docker Infrastructure Constraints – En/ty or Applica/on Constraints • User Defined Strategies • Intelligent Container Orchestra/on
- 36. @grkvlt Container Provisioning • Headroom – Ensure resources available – Based on MaxContainers strategy limit – Or CPU and RAM alloca/on • Scale Docker Host Cluster Automa/cally – Add new Docker hosts – Remove empty Docker hosts
- 37. @grkvlt Networking • Shared Weave LAN – Common to All Containers – Private (Link Local) Addresses • Clocker Controls IP Alloca/on – Applica/ons Segmented by CIDR • Docker Port Forwarding Access
- 38. @grkvlt Networking • Work in Progress • Name Resolu/on – BIND and DNSmasq or Weave DNS – Needed for JMX et al – Enables Many More En//es • Adding More Supported Blueprints
- 39. Demonstra>on
- 43. @grkvlt Roadmap • Latest Docker Feature Support • Swarm – Same API – Can re-‐use our jclouds Driver • Machine – Cloud agnos/c provisioning via jclouds already – Could support as an op/on
- 44. @grkvlt Roadmap • Networking – DNS and DNSmasq Integra/on – Rancher Integra/on – Open vSwitch Integra/on • Gelng Started – Clocker Dockerfile
- 45. @grkvlt Roadmap • Repositories – Docker Repository – Bintray, Ar/factory, Quay.io – Private Repositories • Applica/on Defini/on – TOSCA – Fig
- 46. @grkvlt Roadmap • Plugin API may be helpful? • Provide services to Docker this way • Orchestra/on • Policies • Consume wider range of services • Networking
- 47. @grkvlt Summary • Clocker – Brooklyn + jclouds + Docker + Weave + … – @clockercentral • Solves – Composite Applica/on Management – Docker Cloud Networking – Container Placement and Provisioning
- 48. @grkvlt Audience Ques/ons? 1. What networking features would make Docker easier to use? 2. What other features would be most useful to enhance Docker usability? 3. Will you be tes/ng Swarm and Machine or would you prefer an external orchestra/on tool?
- 49. @grkvlt Web Resources http://clocker.io/ http://brooklyn.io/ http://docker.io/ http://github.com/zettio/weave/ http://abstractvisitorpattern.co.uk/ https://speakerdeck.com/grkvlt/clocker-‐the-‐ docker-‐cloud-‐maker