Create Discovery Service for NCache Clients in AKS

Inside an AKS cluster, every pod is assigned a dynamic IP address that is unknown to every other pod. To make sure that your client application creates a connection with NCache servers successfully, you need a service that exposes the NCache deployment pod's IP address for your application. So you need to create a headless discovery service that gives the client application access to the pods running the cache service inside the Azure Kubernetes cluster.

Create Discovery Service YAML File

Create a YAML file for headless discovery service. Let's call this file discoveryservice.yaml and this is what it should look like:

Note

The parameters required to create this YAML file, ready to be deployed, are mentioned in the Properties table.

kind: Service
apiVersion: v1          # it depends on the underlying Kubernetes version 
metadata:
  name: cacheserver
  labels:
    app: cacheserver
spec: 
  clusterIP: None
  selector:
    app: ncache         # same label as provided in the ncache YAML file
  ports:
  - name: management-tcp
    port: 9803
    targetPort: 9803
  - name: client-port
    port: 9800
    targetPort: 9800

Tip

Here, the clusterIP tag equals none, meaning that this service will not have any public IP assigned to it. This is what makes this service a headless service.