How to get client IP address from inside a Azure Kubernetes with a LoadBalancer service

9/9/2018

I'm getting the node IP address instead of the client IP. Is it possible to get the client IP with a service of type LoadBalancer? Or will I need to use a ingress controller?

apiVersion: v1
kind: Service
metadata:
  name: app-svc
  labels:
    name: app-svc
    environment: dev
spec:
  type: LoadBalancer
  loadBalancerIP: XXX.XXX.XXX.XXX
  ports:
    - name: http-port
      port: 80
      targetPort: 80
      protocol: TCP
  selector:
      name: app-deploy
-- lmcarreiro
azure
azure-aks
azure-kubernetes
azure-load-balancer
kubernetes

1 Answer

9/10/2018

You do not need any Ingress controller. However it is required to set the value of the spec.externalTrafficPolicy Service field to "Local" (the default is "Cluster") in Microsoft Azure.

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  type: LoadBalancer
  externalTrafficPolicy: Local
  ...

See Using source IP.

-- Antoine Cotten
Source: StackOverflow