How to write Global external application load balancer ingrees yaml

[AnishGehlot]

How can I use the GCP global external application load balancer as an ingress in the gke having backend config of CLIENT_IP session affinity with MAGLEV load balancing policy?

[Marvin_Lucero]

Hi @AnishGehlot ,

You can try doing a backend service with CLIENT_IP session affinity and MAGLEV load balancing policy. You may refer to the BackendConfig resource below:

apiVersion: v1
kind: Service
metadata:
   name: your-service
   annotations:
     cloud.google.com/backend-config: '{"default": "your-backend-config"}'
spec:
   selector:
     app: your-app
ports:
     - protocol: TCP
       port: 80
       targetPort: 8080

apiVersion: cloud.google.com/v1
kind: BackendConfig
metadata:
  name: your-backend-config
spec:
  sessionAffinity:
    affinityType: "CLIENT_IP"
  maglevPolicy: {}

Then, a global forwarding rule must be created which is associated to the backend service you created.

apiVersion: v1
kind: Service
metadata:
   name: your-service
spec:
   type: LoadBalancer
   loadBalancerIP: "your-load-balancer-ip"
   ports:
     - protocol: TCP
       port: 80
       targetPort: 8080
selector:
   app: your-app

 This should be possible as it is not using weighted traffic splitting, as mentioned in this documentation.