Building a SaaS with Nodejs, Docker, and CoreOS
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Ross Kukulinski gave a presentation on building a SaaS application with Node.js, Docker, and CoreOS. He discussed how using Docker and CoreOS helped his company achieve goals like running multiple app versions consistently across environments, minimizing devops work. Docker allows building portable apps that run anywhere, while CoreOS is a Linux designed for massive server deployments using automated updates and Docker containers. It provides tools for fault tolerance, scalability and service discovery. Kukulinski then provided tips on Dockerizing Node apps, using Docker Compose, booting CoreOS clusters, monitoring with CoreGI and continuous deployment with Paz.
Building a SaaS with Nodejs, Docker, and CoreOS
- 1. @RossKukulinski Building a SaaS with NodeJS, Docker, and CoreOS London Node Users’ Group March 25, 2015
- 2. @RossKukulinski @RossKukulinski Yodlr Founder / CEO BayNode Co-Organizer Soccer Fanatic rossk on Freenode
- 3. @RossKukulinski What I’m going to Cover • Our story • Why Docker & CoreOS • Tips & Tricks
- 5. @RossKukulinski The internal tool that wasn’t internal anymore
- 7. @RossKukulinski Our Goals • Reduce application complexity (do one thing well!) • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 10. @RossKukulinski • Containers start quickly • Containers have small footprint • “Dockerized” applications run anywhere • Fast builds via cached images • Registry for storing images from build pipeline • Images can be stacked • Abstracts app networking from system networking
- 11. @RossKukulinski Our Goals • Reduce application complexity (do one thing well!) • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 12. @RossKukulinski How do you ship docker containers? Bash scripts (ugh) Ansible / Puppet / Chef Docker Swarm (just released)
- 13. @RossKukulinski Linux for Massive Server Deployments
- 14. @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/
- 15. @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/
- 17. @RossKukulinski Goals • Reduce application complexity (do one thing well!) • Run multiple versions of the same app • Consistent app from dev → test → staging → prod • Scalable • Fault tolerant • Minimize time spent doing ‘devops’
- 18. @RossKukulinski Now for the good stuff Let’s talk tips & tricks
- 23. @RossKukulinski Booting CoreOS Cluster • Most frustrating part of the whole experience • RTFM re: cloud_config.yml • Use Ansible for easy provisioning • Great resources: • https://coreos.com/docs/ • https://www.digitalocean.com/community/ tutorial_series/getting-started-with-coreos-2
- 24. @RossKukulinski npm install -g coreos-cluster-cli
- 26. @RossKukulinski Confd • https://github.com/kelseyhightower/confd • Monitors etcd for changes to key:value pairs • Writes updated config file based on Go template • We use with nginx, could be anything! http://tinyurl.com/redis-sk
- 27. @RossKukulinski Monitoring CoreOS with https://github.com/yodlr/CoreGI
- 31. @RossKukulinski Other Tools • Kubernetes (Powers Google Container Engine) • Deis (Open-source heroku clone) • Vulcan Proxy (https://vulcand.io/)
- 32. @RossKukulinski etcd is a database treat it like one
- 33. @RossKukulinski Docker & CoreOS are the future for application development and deployment Write that down