Connect existing Ingress service on Google Cloud

[Simran-B]

Theo in Community Slack (about k8s cluster):

I am trying to connect an existing Ingress service on Google Cloud with my ArangoDB instance (using the operator). I do not choose LoadBalancer as an external service since this is going to create a new LoadBalancer (which I do not want), so I create a manual NodePort service which I assign to my Ingress controller yaml. However the Ingress cannot see the service.

...

Ok I found the issue here. The Google Cloud Ingress creates a Level 7 LoadBalancer for HTTP and HTTPS traffic. It demands a health check for all containers. The ArangoDB coordinator containers include a readiness probe, however the schema is set to HTTPS. However the default connection between an Ingress resource defaults to HTTP when communicating with a Service and the Ingress controller cannot access the readinessProbe. The solution is to default the Service with this annotation:

kind: Service
apiVersion: v1
metadata:
  name: arangodb-staging-service-nodeport
  annotations:
    cloud.google.com/app-protocols: '{"https-port":"HTTPS"}'
spec:
  selector:
    arango_deployment: arangodb-staging
    role: coordinator
  type: NodePort
  ports:
    - name: https-port
      port: 8529
      targetPort: 8529

This enables the Ingress to connect with the readiness probe.