Shipping NodeJS Apps with Docker and CoreOS
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This document summarizes Ross Kukulinski's talk on shipping Node.js applications with Docker and CoreOS. The talk covered their company's use of Docker and CoreOS to run Node.js applications, the benefits of Docker and CoreOS, and tips for using Docker registries, developing locally with CoreOS, monitoring, service discovery, and load balancing with CoreOS. Resources for learning more about Docker, CoreOS, and deploying applications with them were also provided.
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Shipping NodeJS Apps with Docker and CoreOS
- 1. Shipping NodeJS with Docker and CoreOS @RossKukulinski BayNode Talk Night November 20, 2014
- 2. @RossKukulinski @RossKukulinski SpeakIt.io Founder BayNode Co-Organizer Soccer Fanatic Node-Forward Mentor
- 3. What I’m going to Cover @RossKukulinski • Our Story • Background on Docker & CoreOS • Tips & Tricks / Lessons Learned
- 5. The internal tool that wasn’t internal anymore @RossKukulinski
- 8. @RossKukulinski Our Goals • Reduce application complexity (do one thing well!) • Scalable • Fault tolerant • Support running multiple versions of the same app • Consistent app from dev → test → staging → prod • Minimize time spent doing ‘devops’
- 10. VM vs Docker @RossKukulinski https://docker.com/whatisdocker/
- 11. @RossKukulinski • Containers start quickly • Containers have small footprint • Dockerized applications run anywhere • Really fast builds via cached images • Registry for storing images from build pipeline • Images can be layered • Abstracts app networking from system networking
- 12. @RossKukulinski Our Goals • Reduce application complexity (do one thing well!) • Scalable • Fault tolerant • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Minimize time spent doing ‘devops’
- 13. How do you ship docker containers? @RossKukulinski Bash scripts (ugh) Ansible / Puppet / Chef
- 14. Linux for Massive Server Deployments @RossKukulinski
- 15. @RossKukulinski • Minimal Operating System • Automated software updates • Runs docker containers • Supported by all major cloud providers • Can also run on bare metal https://coreos.com/
- 16. @RossKukulinski Fault Tolerant • Clustered by default • Support for multiple HA zones • Distributed tools like etcd & fleet • HTTP Key-Value Store • Service Discovery • Application Scheduling https://coreos.com/
- 18. @RossKukulinski Goals • Reduce application complexity (do one thing well!) • Scalable • Fault tolerant • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Minimize time spent doing ‘devops’
- 19. Now for the good stuff @RossKukulinski Lessons Learned / Tips & Tricks
- 20. Docker Registry @RossKukulinski • Public Registry • Private Registry • Quay.io / DockerHub • Run your own • Take advantage of layering docker images
- 22. Node App Dockerfile @RossKukulinski
- 23. Private GitHub Repos @RossKukulinski
- 24. > docker pull image:latest @RossKukulinski
- 25. Local CoreOS Dev • Can use Vagrant with a single (or multi) node cluster • Digital Ocean pretty cheap for small cluster @RossKukulinski
- 26. @RossKukulinski Monitoring • CLI tools (fleetctl via ssh) • CoreGI (github.com/astilabs/ CoreGI) • cAdvisor (github.com/google/ cadvisor)
- 27. Service Discovery @RossKukulinski • Don’t hardcode the host port of your container • Sidekick pattern -> Write to etcd • Confd (github.com/ kelseyhightower/confd) • Vulcan (vulcanproxy.com) https://coreos.com/
- 28. Cloud Load Balancers • How do your users access services in CoreOS? • Could run Global service with proxy on 80/443 • Or update cloud lbs dynamically based on etcd • Soon: github.com/astilabs/CoreOS-Cloud-LB @RossKukulinski
- 29. npm install -g coreos-cluser-cli @RossKukulinski
- 30. Things to watch @RossKukulinski • Kubernetes • Google Container Engine • Vulcan Proxy • Paz (paz.sh) • Panamax (panamax.io) • Mesosphere (mesosphere.com)
- 31. @RossKukulinski Resources • Example cloud_config • https://gist.github.com/rosskukulinski/ 9ddff8e5f67a24cc7bb7 • Full example of sidekick pattern for Redis • https://gist.github.com/rosskukulinski/ 96f7709fa20d7def6b9e • PXE Booting CoreOS Post coming soon…
- 32. Other Resources @RossKukulinski • CoreOS Docs: https://coreos.com/docs/ • CoreOS User Google Group • #coreos & #docker on FreeNode (I’m ‘rossk’) • SpeakIt GitHub (https://github.com/astilabs) • SpeakIt Blog (https://blog.speakit.io)