记录一次k8s pod之间ip无法访问，问题排查与定位

问题展现现象

node之间通信正常 部分node上的pod无法通信

排查有问题node

使用启动网络测试工具

环境准备

docker

数据库mysql

使用有状态副本集合

---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  annotations:
    k8s.kuboard.cn/displayName: 有状态内网穿透集群
  labels:
    k8s.kuboard.cn/layer: svc
    k8s.kuboard.cn/name: network-server-cluster-start
  name: network-server-cluster-start
  namespace: default
spec:
  podManagementPolicy: OrderedReady
  replicas: 10
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s.kuboard.cn/layer: svc
      k8s.kuboard.cn/name: network-server-cluster-start
  serviceName: network-server-cluster-start
  template:
    metadata:
      labels:
        k8s.kuboard.cn/layer: svc
        k8s.kuboard.cn/name: network-server-cluster-start
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchLabels:
                  k8s.kuboard.cn/layer: svc
                  k8s.kuboard.cn/name: network-server-cluster-start
              topologyKey: kubernetes.io/hostname
      containers:
        - env:
            - name: spring.datasource.url
              value: >-
                jdbc:mysql://mysql-host:mysql-port/wu_lazy_cloud_netty_server_cluster?allowMultiQueries=true&useUnicode=true&autoReconnect=true&useAffectedRows=true&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true&databaseTerm=SCHEMA
            - name: JAVA_OPTS
              value: '-Xms64m -Xmx128m'
            - name: spring.datasource.username
              value: root
            - name: spring.datasource.password
              value: laihui
            - name: spring.lazy.netty.server.node-id
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: spec.nodeName
            - name: spring.lazy.netty.server.node-port
              value: '7101'
          envFrom:
            - configMapRef:
                name: wu-smart-agent-network-heartbeat-server-cluster-start-conf
          image: >-
            registry.cn-hangzhou.aliyuncs.com/wu-lazy/wu-smart-agent-network-heartbeat-server-cluster-start:1.2.5-JDK17-NATIVE-SNAPSHOT
          imagePullPolicy: Always
          name: network-server-cluster-start
          ports:
            - containerPort: 7101
              hostPort: 7101
              name: tcp7101
              protocol: TCP
          resources: {}
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
  updateStrategy:
    rollingUpdate:
      partition: 0
    type: RollingUpdate

---
apiVersion: v1
kind: Service
metadata:
  annotations: {}
  labels:
    k8s.kuboard.cn/layer: svc
    k8s.kuboard.cn/name: network-server-cluster-start
  name: network-server-cluster-start
  namespace: default
spec:
  ipFamilyPolicy: SingleStack
  ports:
    - name: 6eqe4d
      port: 7101
      protocol: TCP
      targetPort: 7101
  selector:
    k8s.kuboard.cn/layer: svc
    k8s.kuboard.cn/name: network-server-cluster-start
  sessionAffinity: None
  type: ClusterIP


---
apiVersion: v1
data:
  spring.lazy.netty.server.node-host: '${HOSTNAME}.network-server-cluster-start.default.svc.cluster.local'
kind: ConfigMap
metadata:
  name: wu-smart-agent-network-heartbeat-server-cluster-start-conf
  namespace: default

---
apiVersion: v1
kind: Service
metadata:
  annotations: {}
  name: network-server-cluster-start-web
  namespace: default
spec:
  ports:
    - name: sjmxma
      nodePort: 33201
      port: 6101
      protocol: TCP
      targetPort: 6101
  selector:
    k8s.kuboard.cn/name: network-server-cluster-start
  sessionAffinity: None
  type: NodePort

配置参数需要调整的

::: tip 其中 mysql-host、mysql-port 替换成你本地具体数据库 ::: 注意副本数量调整为你可以调度的节点数据量

打开页面 http://集群IP:33201/netty-server-ui/index.html （默认账号/密码：admin/admin）

初始化菜单、添加角色、用户授权角色

打开集群管理页面（查看异常状态节点）