apiVersion: apps/v1
kind: Deployment
metadata:
    name: nginx-deployment
spec:
    replicas: 3  # 创建3个Pod副本
    selector:
        matchLabels:
            app: nginx
    template:
        metadata:
            labels:
                app: nginx
        spec:
            containers:
            - name: nginx
                image: nginxdemos/hello:latest  # 使用nginx演示镜像
                ports:
                - containerPort: 80  # 容器内暴露80端口
---
apiVersion: v1
kind: Service
metadata:
    name: nginx-service
spec:
    selector:
        app: nginx  # 选择所有带有app=nginx标签的Pod
    ports:
    - protocol: TCP
        port: 80  # 服务暴露的端口
        targetPort: 80  # 目标Pod的端口
    type: ClusterIP  # 创建集群内部IP
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
    name: nginx-ingress
    annotations:
        traefik.ingress.kubernetes.io/router.entrypoints: web
        traefik.ingress.kubernetes.io/service.loadbalancer.method: drr  # 使用轮询负载均衡
        traefik.ingress.kubernetes.io/service.sticky: "false"  # 禁用会话粘性
spec:
    rules:
    - host: example.com  # 设置访问域名
        http:
            paths:
            - path: /  # 根路径
                pathType: Prefix
                backend:
                    service:
                        name: nginx-service
                        port:
                            number: 80  

kubectl apply -f nginx-demo.yaml

deployment.apps/nginx-deployment created
service/nginx-service created
ingress.networking.k8s.io/nginx-ingress created

kubectl get pods -o wide