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CI/CD with Kubernetes, Helm & Wercker (#madScalability)
- 1. CI/CD with Kubernetes, Helm & Wercker #madScalability Madrid 30/11/2016
- 2. About me: Javier Cuevas @javier_dev AIRBNB FOR DOGS “MAJESTIC” RAILS 3.2 MONOLITH RUBY ON RAILS SHOP WHO EMBRACED ELIXIR previously now full time!
- 3. First things first: My review of the new MacBook Pro with Touch Bar: Meh 😔
- 4. Disclaimers 1. I learned Docker while learning Kubernetes. I ain’t no expert. 2. Gudog is not at unicorn scale. We’re just at dog scale.
- 7. A LOOK BACK TO DEVOPS @ Gudog
- 8. Hosting / Cloud Provisioning Continuos Integration Deployments 2013 DigitalOcean SSH all the things 🙀 Jenkins Capistrano 2014 AWS EC2 Rubber Shippable Capistrano 2015 AWS EC2 (OpsWorks) Chef (OpsWorks) Shippable Chef (OpsWorks) 2016 Google Container Engine (GKE) Kubernetes 💙 Wercker Kubernetes + Helm
- 9. Why we chose Google Cloud 😱 Because we ran out of AWS credits and we got new credits for Google Cloud. 💸 Because (now that we’re paying for it) is cheaper than AWS. 👌 Because it has the best integration available with Kubernetes.
- 10. Why we chose Kubernetes ' Because the guy from Google Cloud told us it was super cool. 🤔 Because we had no idea what that Docker thing was about and we were wondering.
- 11. Why we chose Wercker 🚀 Because it was way faster than Shippable running our Slow Rails Test Suite™ . 🤑 Because, as Shippable, it’s free. ✨ Because the UX/UI is so pretty.
- 12. KUBERNETES 101 (IN 3 MINS)
- 13. What is Kubernetes? • Open-source system for container orchestration and more. • Works with many cloud providers (Google Cloud, AWS, etc.) and bare metal.
- 14. Basic Kubernetes concepts • Node: a VM or bare metal machine running Kubernetes. • Cluster: a bunch of nodes. • Pod: a group of one or more containers. • Deployment: defines how many replicas of a Pod you want and how to perform updates (deploys). • Service: exposes some pods in a given port.
- 17. Worker Deployment … Web Service DB Service Redis Service Memcached Service Memcached Deployment Memcached Pod memcached Worker Pod resque Worker Pod resque Web Deployment …Web Pod nginx + unicorn Web Pod nginx + unicorn Cron Deployment Cron Pod cron -f Redis Deployment Redis Pod redis DB Deployment DB Pod postgres Web Ingress ☁Internet
- 18. HELM 101 (IN 3 MINS)
- 19. What is Helm? • It’s a package manager for Kubernetes 🤔 • Charts are packages of pre-configured Kubernetes resources. • You can use public Charts to easily install apps into your cluster (eg: postgresql, wordpress). • … Or you can create a private Chart for your application.
- 20. What is Helm? • You can use templates to define your Charts 🙌 • Helm has two parts: - helm: a CLI client - tiller: A server (tiller) than runs in your Kubernetes cluster as another pod. You can install tiller in your cluster with: $ helm init
- 22. HOW WE USE HELM
- 23. File structure & code !"" app !"" config !"" db !"" deploy !"" lib !"" log !"" public !"" script !"" spec !"" vendor !"" Gemfile !"" Gemfile.lock !"" Procfile !"" Rakefile !"" config.ru #"" wercker.yml deploy !"" kubernetes-chart $ !"" templates $ $ !"" _helpers.tpl $ $ !"" cron.yaml $ $ !"" db.yaml $ $ !"" memcached.yaml $ $ !"" redis.yaml $ $ !"" secrets.yaml $ $ !"" web.yaml $ $ #"" worker.yaml $ !"" Chart.yaml $ !"" README.md $ !"" production-values.yaml $ !"" rails_env.yaml $ !"" staging-values.yaml $ #"" values.yaml !"" nginx.conf #"" unicorn.rb https://gist.github.com/javiercr/fa4335e6bc67147b1e12523b0282a18a
- 24. WERCKER 101 (IN 3 MINS)
- 25. What is Wercker? • It’s a Docker-Native CI/CD Automation platform for Kubernetes & Microservice Deployments. • With Wercker you define your CI/CD process as Workflow composed by multiple Pipelines. • Each Pipeline is defined by multiple Steps. Wercker offers a Registry of shared steps (eg: to install kubectl)
- 29. install nodejs, phantomjs bundle install rake db:create rspec install nodejs, nginx, cron copy nginx.conf copy unicorn.rb bundle install rake assets:precompile hipchat notification install kubectl install helm helm upgrade hipchat notification build build-container deploy-staging Gudog’s Wercker Workflow note that we decided to only automate deployments to staging. env. however deploying to production it’s just one click (executing the deploy-production pipeline from wercker ui) docker push to GCR
- 30. Gudog’s Wercker Workflow Our wercker.yml: https://gist.github.com/javiercr/fa4335e6bc67147b1e12523b0282a18a#file-wercker-yml
- 32. THANK YOU Questions? Special thanks to @LachlanEvenson from Deis for helping me get started with Helm and the k8s community.