Highway to Helm Stairway to Kubernetes By Michelle Noorali @michellenoorali

Hello, It’s me.

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A Platform as a Service Company

Platform as a service (PaaS)

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Deis Workflow Kubernetes-native PaaS Kubernetes package manager Steward Kubernetes-native service broker

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Dearest human, Clear commit messages are the key to life. Sincerely, Michelle from Microsoft

We need a tool to manage a group of Kubernetes resources as one unit.

Helm, a package manager for Kubernetes

Charts ● Are application definitions ● Consist of ○ Metadata ○ Kubernetes resource definitions ○ Configuration ○ Documentation ● Live in chart repositories

Helm: 3 Core Concepts ● Chart - expert built recipe for installing an application ● Values - user supplied configuration ● Release - instance of Chart + Values that get deployed in Kubernetes

Prerequisites ● Download Helm & put it in your path ● Grab a running Kubernetes cluster

$ helm init ● Configures your local environment ● Creates a pod called Tiller in your cluster

Tiller, it’s a thriller ● Server-side component ● Lives his life inside k8s cluster as a pod ● Creates & manages releases in your cluster ○ Release = installation of a Chart Kubernetes Tiller Helm Client gRPC

Recap ● Helm is the client ● Tiller is the server ● Kubernetes is the target platform & data storage ● Chart + Values = Release

Demos: ● Init in Action ● Install a chart ● Upgrade a release ● Delete a release

Where can I get a Helm like that? ● Homebrew brew install kubernetes-helm ● Github github.com/kubernetes/helm/releases

If you like, then you gotta put a chart on it

$ helm create

Chart Structure myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml

Templates myapp ├── Chart.yaml ├── README.md ├── charts ├── templates │ ├── deployment.yaml │ └── svc.yaml └── values.yaml

Configuration myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml └── requirements.yaml values.yaml image: mycompany/myapp:1.0.0 imagePullPolicy: IfNotPresent service: port: 80 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

Configuration values.yaml image: mycompany/myapp:1.0.0 imagePullPolicy: IfNotPresent service: port: 80 Configure values on command line with the --set flag $ helm install --set service.port=8080 myapp/ Or pass in a new values file on command line with the -f flag $ helm install -f myvalues.yaml myapp

Dependencies myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml └── requirements.yaml dependencies: - name: mariadb version: 0.5.2 repository: http://storage.googleapis.com/kubernetes-charts requirements.yaml

Documentation myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── NOTES.txt └── values.yaml

Metadata myapp ├── Chart.yaml ├── README.md ├── charts ├── templates └── values.yaml └── requirements.yaml

Chart repositories ● Has an index.yaml file ● Any web server accessible via http(s)

Official Kubernetes Charts Repository ● Lives at github.com/kubernetes/charts ● Stable & Incubator repositories ● Over 70 stable charts ● ~ 9 incubator charts ● Lots of PRs

KubeApps.com ● github.com/helm/monocular

Helm is a piece of the puzzle

Get Involved

Kubernetes Community ● Special Interest Groups ○ Meetings are recorded and on youtube ● github.com/kubernetes/community ● Slack.k8s.io ● Helm is under the SIG-Apps umbrella

Helm Community ● 149 contributors ● Kubernetes slack channels: #helm-users, #helm-dev ● Weekly updates and demos at SIG Apps (recorded & available on youtube) ● Documentation coming soon on http://helm.sh

Thank you Container Camp!!! Sincerely, Michelle from Microsoft

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