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Sebastien goasguen cloud stack and docker
- 1. Docker and CloudStack Sebastien Goasguen London Meetup May 21st @sebgoa
- 2. Background • Citrix Open Source Architect • Open Source Business Office • VP of Apache CloudStack • PMC of Apache libcloud • ASF member • O’Reilly author of the Docker cookbook
- 3. Cloud Goals • Utility computing • Elasticity of the infrastructure • On-demand • Pay as you go • Multi-tenant • Programmable access (i.e API)
- 4. So what… • Solved with CloudStack • What is not solved: • - Application deployment • - Application scalability • - Application portability • - Application composability
- 6. Docker basics • Originated at Dotcloud • Wrapper on top of LXC • Great UX for developers • Ease of use • Apparent speed compared to VMs
- 7. Containers • Docker now based on libcontainer • Create separate process namespace on host • Same kernel • Use cgroups for resource allocation/isolation • Not an hypervisor • Not meant to be logged into • Packages application/services
- 8. Installation $ sudo curl -sSL https://get.docker.com/ubuntu/ | sudo sh $ sudo yum install docker
- 9. Use $ docker run busybox echo foobar Foobar $ docker run –ti ubuntu:14.04 /bin/bash root@0156ad334ca4:/#
- 10. The App store $ docker push runseb/application $ docker pull runseb/application $ docker run –d runseb/application
- 12. How to use this in CloudStack • #1 Gut reaction: – Let’s write a Docker plugin and treat it as an Hypervisor • But: – It’s not an hypervisor – The networking model is still evolving – It will not help with application deployment and portability – It’s trying to put a PaaS in a IaaS
- 13. And… • Where is Docker going to run ? • On baremetal ? • On VMs ? • In the Cloud ?
- 14. How to use this in CloudStack • #2 Docker in VM – Create CloudStack template that have the Docker daemon • Examples: – AWS default AMI – GCE container VM – Azure Docker templates
- 15. New OS
- 16. How to use this in CloudStack • #3 Docker optimized OS – Create CloudStack template from new OS • Examples: – coreOS – in production – Ubuntu snappy – Atomic – RancherOS – Microsoft nano
- 18. How to use this in CloudStack • #4 Container service – Launch containers in clusters through API • Examples: – AWS ECS – Google GKE (i.e Kubernetes ) – Lattice CF – Mesos/Marathon – Rancher • See Docker “platforms” as a workload
- 19. How to use this in CloudStack • #5 CloudStack plugins in Docker ecosystem – Docker-machine
- 20. Docker and CloudStack • Do not try to write a new “hypervisor” plugin • Docker ecosystem taking care of Docker orchestration • Focus on: – Docker optimized OS (e.g coreOS, atomic) – Deploying application mgt framework (e.g Mesos, Kubernetes)