Adding Ingress resource to LangKit Helm chart

[AnchorArray]

Changes

• Add ingress resource to LangKit helm chart
• Update documentation for clarity on OCI compliant helm repos vs more traditional repos
• Added changelog

Testing

Adding ingress-nginx to Azure cluster for testing

helm upgrade --install ingress-nginx ingress-nginx \
  --set 'controller.tolerations[0].key=kubernetes.azure.com/scalesetpriority' \
  --set 'controller.tolerations[0].operator=Exists' \
  --set 'controller.tolerations[0].effect=NoSchedule' \
  --set 'defaultBackend.tolerations[0].key=kubernetes.azure.com/scalesetpriority' \
  --set 'defaultBackend.tolerations[0].operator=Exists' \
  --set 'defaultBackend.tolerations[0].effect=NoSchedule' \
  --set 'controller.admissionWebhooks.patch.tolerations[0].key=kubernetes.azure.com/scalesetpriority' \
  --set 'controller.admissionWebhooks.patch.tolerations[0].operator=Exists' \
  --set 'controller.admissionWebhooks.patch.tolerations[0].effect=NoSchedule' \
  --set 'controller.admissionWebhooks.install.tolerations[0].key=kubernetes.azure.com/scalesetpriority' \
  --set 'controller.admissionWebhooks.install.tolerations[0].operator=Exists' \
  --set 'controller.admissionWebhooks.install.tolerations[0].effect=NoSchedule' \
  --set 'defaultBackend.enabled=true" \
  --repo https://kubernetes.github.io/ingress-nginx \
  --namespace ingress-nginx --create-namespace

# Uninstall
helm uninstall -n ingress-nginx ingress-nginx

Upgrade langkit Helm chart

# Download latest version of the chart
helm pull \
  oci://ghcr.io/whylabs/langkit \
  --version "0.3.0"

# Confirm changes prior to upgrade
helm diff upgrade \
  --set namespace.create=false \
  --set ingress.enabled=true \
  --set ingress.className=nginx \
  --set 'ingress.hosts[0].paths[0].path=/langkit' \
  --set 'ingress.hosts[0].paths[0].pathType=ImplementationSpecific' \
  --set 'ingress.hosts[0].paths[0].backend.service.name=langkit' \
  --set 'ingress.hosts[0].paths[0].backend.service.port.number=80' \
  --namespace langkit \
  langkit langkit-0.3.0.tgz

# Perform the upgrade
helm upgrade --install \
  --set namespace.create=false \
  --set ingress.enabled=true \
  --set ingress.className=nginx \
  --set 'ingress.hosts[0].paths[0].path=/langkit' \
  --set 'ingress.hosts[0].paths[0].pathType=ImplementationSpecific' \
  --set 'ingress.hosts[0].paths[0].backend.service.name=langkit' \
  --set 'ingress.hosts[0].paths[0].backend.service.port.number=80' \
  --namespace langkit \
  langkit langkit-0.3.0.tgz

The langkit helm chart 0.3.0 upgrade produces this ingress resource:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    meta.helm.sh/release-name: langkit
    meta.helm.sh/release-namespace: langkit
  labels:
    app.kubernetes.io/instance: langkit
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: langkit
    app.kubernetes.io/version: 0.0.28
    helm.sh/chart: langkit-0.3.0
  name: langkit
  namespace: langkit
spec:
  ingressClassName: nginx
  rules:
  - http:
      paths:
      - backend:
          service:
            name: langkit
            port:
              number: 80
        path: /langkit
        pathType: ImplementationSpecific
status:
  loadBalancer:
    ingress:
    - ip: 20.29.145.44

Test the Ingress

kubectl port-forward service/ingress-nginx-controller -n ingress-nginx 8080:80 &
curl http://localhost:8080/langkit

Logs from nginx

127.0.0.1 - - [23/Jan/2024:20:55:11 +0000] "GET /langkit HTTP/1.1" 404 22 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36" 694 0.002 [langkit-langkit-80] [] 10.224.0.226:8000 22 0.003 404 0e1fa326f3f9efbcf42d27cf89b42257

Logs from langkit

INFO:     10.224.0.105:32786 - "GET /langkit HTTP/1.1" 404 Not Found

[andyndang]

LGTM~