k8s zookeeper java.net.UnknownHostException: zk-1.zk-hs.default.svc.cluster.local

k8s zookeeper java.net.UnknownHostException: zk-1.zk-hs.default.svc.cluster.local

k8s zookeeper 集群，pod状态异常…

https://stackoverflow.com/questions/30940981/zookeeper-error-cannot-open-channel-to-x-at-election-address

zk镜像 kubebiz/zookeeper

cat start-zookeeper

...
function print_servers() {
    for (( i=1; i<=$SERVERS; i++ ))
    do
        #echo "server.$i=$NAME-$((i-1)).$DOMAIN:$SERVER_PORT:$ELECTION_PORT"
        if [ $ORD -eq $((i-1)) ]; then
            echo "server.$i=0.0.0.0:$SERVER_PORT:$ELECTION_PORT"
        else
            echo "server.$i=$NAME-$((i-1)).$DOMAIN:$SERVER_PORT:$ELECTION_PORT"
        fi
    done
}
...

[root@hadoop03 k8s]# cat nufront-zookeeper-dockerfile

FROM kubebiz/zookeeper:latest
##镜像维护者信息
#MAINTAINER "lancelot<844256931@qq.com>"
COPY start-zookeeper /usr/bin/

###
[root@hadoop03 k8s]# docker build -f nufront-zookeeper-dockerfile -t nufront/zookeeper:v1 .

zookeeper.yaml

apiVersion: v1
kind: Service
metadata:
  name: zk-hs
  labels:
    app: zk
spec:
  ports:
  - port: 2888
    name: server
  - port: 3888
    name: leader-election
  clusterIP: None
  selector:
    app: zk
---
apiVersion: v1
kind: Service
metadata:
  name: zk-service
spec:
  type: NodePort            # 配置NodePort，外部流量可访问k8s中的服务
  ports:
  - port: 2181             # 服务访问端口，集群内部访问的端口
    targetPort: 2181          # pod控制器中定义的端口（应用访问的端口）
    nodePort: 32181         # NodePort，外部客户端访问的端口
  selector:
    app: zk
---
apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: zk-pdb
spec:
  selector:
    matchLabels:
      app: zk
  maxUnavailable: 1
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: zk
spec:
  selector:
    matchLabels:
      app: zk
  serviceName: zk-hs
  replicas: 3
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: OrderedReady
  template:
    metadata:
      labels:
        app: zk
    spec:
      #affinity:
      #  podAffinity:
      #    requiredDuringSchedulingIgnoredDuringExecution:
      #      - labelSelector:
      #          matchexpressions:
      #            - key: "app"
      #              operator: In
      #              values:
      #              - zk
      #        topologyKey: "kubernetes.io/hostname"
      nodeSelector:
        kubernetes.io/hostname: "hadoop03"
      containers:
      - name: kubernetes-zookeeper
        imagePullPolicy: Always
        #image: "kubebiz/zookeeper"
        image: hadoop03:5000/nufront/zookeeper:v1
        resources:
          requests:
            memory: "512Mi"
            cpu: "0.1"
        ports:
        - containerPort: 2181
          name: client
        - containerPort: 2888
          name: server
        - containerPort: 3888
          name: leader-election
        command:
        - sh
        - -c
        - "start-zookeeper 
          --servers=3 
          --data_dir=/var/lib/zookeeper/data 
          --data_log_dir=/var/lib/zookeeper/data/log 
          --conf_dir=/opt/zookeeper/conf 
          --client_port=2181 
          --election_port=3888 
          --server_port=2888 
          --tick_time=2000 
          --init_limit=10 
          --sync_limit=5 
          --heap=512M 
          --max_client_cnxns=60 
          --snap_retain_count=3 
          --purge_interval=12 
          --max_session_timeout=40000 
          --min_session_timeout=4000 
          --log_level=INFO"
        readinessProbe:
          exec:
            command:
            - sh
            - -c
            - "zookeeper-ready 2181"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        livenessProbe:
          exec:
            command:
            - sh
            - -c
            - "zookeeper-ready 2181"
          initialDelaySeconds: 10
          timeoutSeconds: 5
        volumeMounts:
        - name: datadir
          mountPath: /var/lib/zookeeper
      securityContext:
        runAsUser: 1000
        fsGroup: 1000
  volumeClaimTemplates:
  - metadata:
      name: datadir
      annotations:
        volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
    spec:
      accessModes: [ "ReadWriteOnce" ]