option-helm.md

Create a Helm chart to deploy an application

You Will Need

• Helm 3
• Docker
  • Windows
  • macOS
• Kind

---

Setup

Once the above tooling is installed, create your Kubernetes cluster and deploy an ingress controller.

Bash

kind create cluster --wait --config ./resources/cluster.yaml

kubectl apply -f ./resources/ingress.yaml

kubectl wait --namespace ingress-nginx \
  --for=condition=ready pod \
  --selector=app.kubernetes.io/component=controller \
  --timeout=90s

Once the cluster is setup, http://localhost:8080 should return a 404 error.

Powershell

kind create cluster --wait --config ./resources/cluster.yaml

kubectl apply -f ./resources/ingress.yaml

kubectl wait --namespace ingress-nginx `
  --for=condition=ready pod `
  --selector=app.kubernetes.io/component=controller `
  --timeout=90s

Once the cluster is setup, http://localhost:8080 should return a 404 error.

---

Task

• Create a Helm chart to deploy the http-echo application
• The application's image name and tag is hashicorp/http-echo:0.2.3
• The application requires the following arguments
  • --text=hello
• The Helm chart must include the following resources at a minimum
  • Ingress
  • Deployment
• Think about what else should be in a production ready chart

---

Testing

• helm lint must not fail
• When deployed to the cluster, curl http://localhost:8080 must return hello

---

References

• https://helm.sh/docs/helm/helm_create/
• https://helm.sh/docs/helm/helm_lint/
• https://helm.sh/docs/helm/helm_install/
• https://helm.sh/docs/helm/helm_upgrade/
• https://helm.sh/docs/howto/charts_tips_and_tricks/
• https://helm.sh/docs/chart_best_practices/
• https://learnk8s.io/production-best-practices