internal load balancer bamicroservices app in GKE

[EliorDana]

Hi, I have a microservices app in GKE, How can i deploy my service through internal load balancer?
(in the ui i have only 3 option - Cluster ip, Node port, Load balancer(external ip))

[rohankalhans]

you can use k8s annotations.

you can create a service of type load balancer then by adding annotations you can achieve this

[garisingh]

You won't be able to use the UI to create an internal load balancer.  You will actually need to use something like `kubectl` to deploy a Service of type LoadBalancer which specifies that you want an internal LB via annotations.

apiVersion: v1
kind: Service
metadata:
  name: ilb-svc
  annotations:
    networking.gke.io/load-balancer-type: "Internal"
spec:
  type: LoadBalancer
  externalTrafficPolicy: Cluster
  selector:
    app: ilb-deployment
  ports:
  - name: tcp-port
    protocol: TCP
    port: 8080
    targetPort: 8080

See https://cloud.google.com/kubernetes-engine/docs/how-to/internal-load-balancing#create for a walkthrough. 

[EliorDana]

Thank you for your answer,
Can you help me with the annotation syntax to get a http(s) internal load balancer ?
(after adding this annotation a got tcp/udp load balancer ) 

Thank a lot !

[garisingh]

The annotation is kubernetes.io/ingress.class: "gce-internal"

Here's a spec for the Internal HTTP Load Balancer:

# internal-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ilb-demo-ingress
  namespace: default
  annotations:
    kubernetes.io/ingress.class: "gce-internal"
spec:
  defaultBackend:
    service:
      name: hostname
      port:
        number: 80

 But unfortunately there are a number of steps you need to take before you can successfully deploy this:

https://cloud.google.com/kubernetes-engine/docs/how-to/internal-load-balance-ingress#prepare-environ...