Delivering Kubernetes Applications with Helm

Delivered by Matt Butcher, Adnan Abdulhussein, and Michelle Noorali at KubeCon 2016 in Seattle on Nov. 8th, 2016

Transcript

1. Delivering Kubernetes Apps with Helm Matt Butcher @technosophos Michelle Noorali @michellenoorali Adnan Abdulhussein @prydonius
2. https://flic.kr/p/74GbQz Kubernetes’ tools let you build your furniture from scratch.
3. Most of us don’t want to build our furniture from scratch
5. We need a tool to manage a group of resources as one unit.
7. The Package Manager for Kubernetes Packages == Charts
8. Charts • Are application definitions • Consist of... ◦ Metadata ◦ Kubernetes resource definitions ◦ Documentation • Live in chart repositories
9. Grab Helm from Github or Homebrew $ brew cask install helm
10. Getting Started is Simple $ helm init
11. Helm & Tiller Like peanut butter & jelly
12. Tiller • in-cluster component • Lives his life inside k8s as a pod • helps manage releases in your cluster ◦ Release = installation of a Kubernetes Chart Kubernetes Tiller Helm Client gRPC
13. Init in Action https://goo.gl/PyW0wO
14. Install Charts https://goo.gl/fWw8Lm
15. Upgrade a Release https://goo.gl/lChu5T
17. Delete a Release https://goo.gl/vGUkYz
18. Your First Chart $ helm create myapp
19. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml Navigating a Chart
20. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates │ ├── deployment.yaml │ └── svc.yaml └── values.yaml Templates + Go templating
21. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml image: mycompany/myapp:1.0.0 imagePullPolicy: IfNotPresent service: port: 80 Configuration apiVersion: extensions/v1beta1 kind: Deployment spec: template: spec: containers: - name: {{ .Chart.Name }} image: "{{ .Values.image }}" imagePullPolicy: {{ .Values.imagePullPolicy }} ports: - containerPort: {{ .Values.service.port }} templates/deployment.yaml values.yaml
22. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml Configuration $ helm install --set service.port=8080 \ ./myapp $ helm install -f myvalues.yaml ./myapp image: mycompany/myapp:1.0.0 imagePullPolicy: IfNotPresent service: port: 80 values.yaml
23. myapp ├── Chart.yaml ├── README.md ├── charts │ └── mariadb-0.5.2.tgz ├── requirements.yaml ├── templates └── values.yaml dependencies: - name: mariadb version: 0.5.2 repository: http://storage.googleapis.com/kubernetes-charts Dependencies $ helm dependencies update requirements.yaml
24. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates │ └── NOTES.txt └── values.yaml Chart Docs
25. myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml Chart Metadata name: mariadb version: 0.5.2 description: Chart for MariaDB keywords: - mariadb - mysql - database - sql home: https://mariadb.org sources: - https://github.com/bitnami/bitnami-docker-mariadb maintainers: - name: Bitnami email: containers@bitnami.com engine: gotpl
26. • $ helm repo add mycompany charts.mycompany.com • $ helm install mycompany/myapp Chart Repositories
27. github.com/helm/monocular
28. github.com/kubernetes/charts
29. Curated, ready-to-run applications
30. Chart Best Practices
31. It Works Out of the Box
32. Split Out Dependencies
33. Don't Repeat Yourself
34. It's Reproducible
35. It's Configurable
36. 5 Ways Helm Helps Teams
37. Get started quickly with existing charts
38. Build your own charts, and easily share them
39. Manage application lifecycle over time
40. Fit releases to your existing tools and process (not vice versa)
41. Let the cluster be the collaborative center for your releases
42. Helm Community • Over 65 contributors • 1 year old • Slack channel: Kubernetes/#Helm • Public dev meetings: Thursdays @ 9:30 pacific • Weekly updates & demos at SIG-Apps meetings: Mondays @ 9am pacific Join us!
43. What’s Next? • Helm 2.0.0 within 7 days • Helm 2.x ◦ Stability, security ◦ Support for in-cluster testing ◦ Improve the debugging output • Monocular: The Helm Repository UI • Charts: ◦ Continue to grow the stable chart repository ◦ Incubator for testing pre-Beta Kubernetes features ◦ The Best Practices Guide
44. Thank You!