验证 kubernetes 集群

从 Java Pod -> Service -> Ingress -> Nginx -> Browser 全流程验证

Java Pod: 负载
Service: 为 Pod 负载均衡
Ingress: 域名化处理 Service, 便于管理, 且节省集群 NodePort 资源
Nginx: 服务器端总出口 (也可不用)
Browser: 浏览器端访问

测试开源项目

https://github.com/Jansora/OnlineCompiler (opens in a new tab)

创建 Deployment

kubectl apply -f https://storage.qiniu.jansora.com/files/uPic/2023/05/12/onlinecompiler-deployment.yaml

onlinecompiler-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: onlinecompiler
 
spec:
  selector:
    matchLabels:
      app: onlinecompiler
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 20
      maxUnavailable: 20
  replicas: 1
  template:
    metadata:
      labels:
        app: onlinecompiler
    spec:
      containers:
        - name: onlinecompiler
          image: ccr.ccs.tencentyun.com/jansora/onlinecompiler:7.3
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
          volumeMounts:
            - name: nfs-pvc
              subPath: 'onlinecompiler'
              mountPath: "/app/data"
      volumes:
        - name: nfs-pvc
          persistentVolumeClaim:
            claimName: nfs-pvc

创建 Service

kubectl apply -f https://storage.qiniu.jansora.com/files/uPic/2023/05/12/onlinecompiler-service.yaml

onlinecompiler-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: onlinecompiler-service
spec:
  type: ClusterIP
  selector:
    app: onlinecompiler
#    app.kubernetes.io/name: hole-pre
  ports:
    - protocol: TCP
      port: 8080
      targetPort: 8080
      name: http

创建 Ingress Controller

kubectl apply -f https://storage.qiniu.jansora.com/files/uPic/2023/05/12/github-ingress.yaml

onlinecompiler-service.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: github-ingress
spec:
  ingressClassName: nginx
  rules:
    - host: github-onlinecompiler.kubernetes.jansora.com
      http:
        paths:
          - backend:
              service:
                name: onlinecompiler-service
                port:
                  number: 8080
            pathType: Prefix
            path: /

部署成功之后服务会暴露在 Master (192.168.88.101) 的 30080 端口. 需要通过主机名 github-onlinecompiler.kubernetes.jansora.com 才能访问

外部 Web nginx 配置验证

nginx 下配置

这个配置很重要 proxy_set_header Host github-onlinecompiler.kubernetes.jansora.com;

server {
 
    listen 80;
    server_name onlinecompiler.localhost;
 
    location / {
        proxy_pass_header Server;
        proxy_set_header Host github-onlinecompiler.kubernetes.jansora.com;
        proxy_redirect off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_pass http://192.168.88.101:30080/;
    }
}

访问下属链接 onlinecompiler.localhost 验证

1. 通过 curl
curl onlinecompiler.localhost
2. 通过浏览器

online demo

访问下属链接 http://onlinecompiler.jansora.app (opens in a new tab)

14. 部署 Metric Server 16. 集群扩容