Building A SaaS with CoreOS, Docker, and Etcd
4 likes2,276 views
The document discusses strategies for building a scalable SaaS application using CoreOS and etcd, emphasizing goals such as reducing application complexity, A/B testing, and minimizing DevOps efforts. It highlights the importance of etcd as a real-time infrastructure state database and covers service discovery, dynamic external services, and deployment methodologies. Closing thoughts reflect on the benefits of containers, the efficacy of CoreOS, and the impending prominence of Kubernetes.
Building A SaaS with CoreOS, Docker, and Etcd
- 1. @RossKukulinski Building a SaaS with CoreOS and etcd CoreOS Fest May 4, 2015
- 2. @RossKukulinski Ross Kukulinski Yodlr Founder / CEO BayNode Co-Organizer iojs/nodejs Evangelist Soccer Fanatic ross@getyodlr.com
- 4. @RossKukulinski The internal tool that wasn’t internal anymore
- 5. @RossKukulinski Our Goals • Reduce application complexity • A/B test multiple versions of apps • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 7. @RossKukulinski Our Goals • Reduce application complexity • A/B test multiple versions of apps • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 8. @RossKukulinski How do you ship Docker containers?
- 9. @RossKukulinski Linux for Massive Server Deployments
- 10. @RossKukulinski Goals • Reduce application complexity • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 11. @RossKukulinski After further deliberation, we’re going big and switching to CoreOS/Docker entirely. We feel its the right direction long-term for us and application development in general. - Me, internal memo September 2014
- 12. Lightbulb! by Matthew WynnMonitor photo by Don Fulano
- 13. @RossKukulinski 1. etcd is a database So treat it like one
- 15. @RossKukulinski 2. etcd is a database For your real-time infrastructure state
- 16. @RossKukulinski Service Availability REST API microservice Sidekick Sidekick Pattern: 1. Get ip:port of microservice (docker inspect) 2. Health checks (containerized integration tests) 3. Publish service instance details to etcd etcd 1 & 2 3
- 17. @RossKukulinski Service Discovery haproxy confd Confd: 1. Query etcd for ip:port of upstream services 2. Update configuration from template 3. Reload load balancer process etcd github.com/kelseyhightower/confd 2 & 3 1
- 18. @RossKukulinski Dynamic external services DNS & Cloud Load Balancers lb-config lb-config: 1. Query etcd for domain/ip:port of internal lbs 2. Update DNS & external load balancers etcd 12 github.com/yodlr/rax-lb-config
- 20. @RossKukulinski 3. etcd is a database With super important data: Protect it! PSA: $private_ipv4 is probably not what you think it is
- 21. @RossKukulinski 4. Sometimes you just need a GUI (Docker & CoreOS do have awesome CLI tools though)
- 22. github.com/yodlr/CoreGI Also check out purpleworks/fleet-ui
- 23. @RossKukulinski 5. Fleet unit templates aren’t enough rest-api@.service rest-api@{1..3}.service —> 3 instances of the service
- 27. @RossKukulinski Rolling Deploys as a Service github.com/yodlr/fleet-rolling-deploys
- 28. @RossKukulinski Closing thoughts • Containers are awesome • We <3 CoreOS • You can get really far with fleet & etcd • Kubernetes is so close to primetime • Remember: etcd is a database, treat it like one