Support UDP protocol

This lab creates a Deployment and a corresponding Service to manage a UDP server application within a cluster.

Deployment - udp-server-deployment:

• Creates a Deployment named udp-server-deployment.
• Requests five replicas of the UDP server application.
• Defines a pod template with the udp-server label and a container running the specified UDP server image on port 10001 with the UDP protocol.

Service - udp-server-service:

• Creates a LoadBalancer-type Service named udp-server-service.
• Includes an annotation vks.vngcloud.vn/pool-algorithm with the value source-ip for load balancer customization.
• Specifies the service type as LoadBalancer, enabling external access.
• Configures session affinity as ClientIP for persistent connections.
• Exposes port 10001 using the UDP protocol.
• Selects pods labeled with name: udp-server for load balancing.

File udp-server.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: udp-server-deployment
spec:
  selector:
    matchLabels:
      name: udp-server
  replicas: 5
  template:
    metadata:
      labels:
        name: udp-server
    spec:
      containers:
      - name: udp-server
        image: vcr.vngcloud.vn/60108-cuongdm3/udp-server
        imagePullPolicy: Always
        ports:
        - containerPort: 10001
          protocol: UDP
---

apiVersion: v1
kind: Service
metadata:
  name: udp-server-service
  annotations:
    vks.vngcloud.vn/pool-algorithm: "source-ip"
  labels:
    app: udp-server
spec:
  type: LoadBalancer
  sessionAffinity: ClientIP
  ports:
  - port: 10001
    protocol: UDP
  selector:
    name: udp-server

kubectl apply -f udp-server.yaml

Check the resources are created successfully:

kubectl get pods -owide
kubectl get svc -owide

From the portal dashboard:

Now, we can test the service by sending UDP packets to the external service IP address and port 10001: