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基于k8s的zookeeper搭建

来源：博客园

1.官方文档

https://kubernetes.io/zh-cn/docs/tutorials/stateful-application/zookeeper/


(资料图片)

2.k8s部署

2.1.部署文件

zookeeper.yaml
apiVersion: v1kind: Servicemetadata:  name: zk-hs  labels:    app: zkspec:  ports:    - port: 2888      name: server    - port: 3888      name: leader-election  clusterIP: None  selector:    app: zk---apiVersion: v1kind: Servicemetadata:  name: zk-cs  labels:    app: zkspec:  ports:    - port: 2181      name: client  selector:    app: zk---apiVersion: policy/v1kind: PodDisruptionBudgetmetadata:  name: zk-pdbspec:  selector:    matchLabels:      app: zk  maxUnavailable: 1---apiVersion: apps/v1kind: StatefulSetmetadata:  name: zkspec:  selector:    matchLabels:      app: zk  serviceName: zk-hs  replicas: 3  updateStrategy:    type: RollingUpdate  podManagementPolicy: OrderedReady  template:    metadata:      labels:        app: zk    spec:      securityContext:        runAsUser: 1000        fsGroup: 1000      affinity:        podAntiAffinity:          requiredDuringSchedulingIgnoredDuringExecution:            - labelSelector:                matchExpressions:                  - key: "app"                    operator: In                    values:                      - zk              topologyKey: "kubernetes.io/hostname"      containers:        - name: kubernetes-zookeeper          imagePullPolicy: Always          image: "registry.k8s.io/kubernetes-zookeeper:1.0-3.4.10"          resources:            requests:              memory: "200Mi"              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  volumeClaimTemplates:    - metadata:        name: datadir      spec:        accessModes: [ "ReadWriteOnce" ]        resources:          requests:            storage: 200Mi

2.2. 部署说明

2.2.1. PersistentVolume配置：

zookeeper 依赖与PersistentVolume, 需要优先创建3个PersistentVolume

volumeClaimTemplates:    - metadata:        name: datadir      spec:        accessModes: [ "ReadWriteOnce" ]        resources:          requests:            storage: 200Mi

2.2.2. PersistentVolume部署：

PersistentVolume.yaml
---apiVersion: v1kind: PersistentVolumemetadata:  name: kafka-pv1  labels:    type: zookeeperspec:  capacity:    storage: 200Mi  accessModes:    - ReadWriteOnce  hostPath:    path: "/opt/kafka_data1"---apiVersion: v1kind: PersistentVolumemetadata:  name: kafka-pv2  labels:    type: zookeeperspec:  capacity:    storage: 200Mi  accessModes:    - ReadWriteOnce  hostPath:    path: "/opt/kafka_data2"---apiVersion: v1kind: PersistentVolumemetadata:  name: kafka-pv3  labels:    type: zookeeperspec:  capacity:    storage: 200Mi  accessModes:    - ReadWriteOnce  hostPath:    path: "/opt/kafka_data3"

3个PersistentVolume的hostPath必须是不同路径，如果部署在不同机器上面可以相同路径。

sudo kubectl apply -f PersistentVolume.yaml

2.2.3. 用户配置：

zookeeper默认启动的用户是容器内部的zookeeper，用户id为1000， 用户组id为1000

securityContext:        runAsUser: 1000        fsGroup: 1000

启动用户需要确保给予PersistentVolume的硬盘路径访问权限：

sudo chown -R 1000:1000 /opt/kafka_data1sudo chown -R 1000:1000 /opt/kafka_data2sudo chown -R 1000:1000 /opt/kafka_data3

2.2.4. 亲和性配置：

affinity:        podAntiAffinity:          requiredDuringSchedulingIgnoredDuringExecution:            - labelSelector:                matchExpressions:                  - key: "app"                    operator: In                    values:                      - zk              topologyKey: "kubernetes.io/hostname"

zookeeper默认配置podAntiAffinity反亲和力配置，一个节点只能部署1个pod

如果只有1台机器的话，就把它去除，我是就2个节点，所以部署的时候就把亲和性删除了。

2.3.部署

sudo kubectl apply -f zookeeper.yaml

3.验证基本功能

3.1.查看某个pod的配置文件

sudo kubectl exec -it zk-0 -- cat /opt/zookeeper/conf/zoo.cfg
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- cat /opt/zookeeper/conf/zoo.cfg    #This file was autogenerated DO NOT EDIT    clientPort=2181    dataDir=/var/lib/zookeeper/data    dataLogDir=/var/lib/zookeeper/data/log    tickTime=2000    initLimit=10    syncLimit=5    maxClientCnxns=60    minSessionTimeout=4000    maxSessionTimeout=40000    autopurge.snapRetainCount=3    autopurge.purgeInteval=12    server.1=zk-0.zk-hs.default.svc.cluster.local:2888:3888    server.2=zk-1.zk-hs.default.svc.cluster.local:2888:3888    server.3=zk-2.zk-hs.default.svc.cluster.local:2888:3888

3.2.获取zookeeper的完整主机名

for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done    zk-0.zk-hs.default.svc.cluster.local    zk-1.zk-hs.default.svc.cluster.local    zk-2.zk-hs.default.svc.cluster.local

3.3.查看集群状态--3个节点的角色

for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: follower    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: leader    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: follower

3.4.查看myid

for i in 0 1 2; do echo -n "zk-$i"; kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do echo -n "zk-$i"; kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done    zk-01    zk-11    zk-21

3.5.在其他pod去ping zookeeper主机

sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-0.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-0.zk-hs.default.svc.cluster.local    PING zk-0.zk-hs.default.svc.cluster.local (10.244.1.9) 56(84) bytes of data.    64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=1 ttl=64 time=0.340 ms    64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=2 ttl=64 time=0.071 ms    64 bytes from zk-0.zk-hs.default.svc.cluster.local (10.244.1.9): icmp_seq=3 ttl=64 time=0.053 ms    ^C    --- zk-0.zk-hs.default.svc.cluster.local ping statistics ---    3 packets transmitted, 3 received, 0% packet loss, time 2031ms
sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-1.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-1.zk-hs.default.svc.cluster.local    PING zk-1.zk-hs.default.svc.cluster.local (10.244.1.10) 56(84) bytes of data.    64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=1 ttl=64 time=0.226 ms    64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=2 ttl=64 time=0.044 ms    64 bytes from 10-244-1-10.zk-cs.default.svc.cluster.local (10.244.1.10): icmp_seq=3 ttl=64 time=0.042 ms    ^C    --- zk-1.zk-hs.default.svc.cluster.local ping statistics ---    3 packets transmitted, 3 received, 0% packet loss, time 2038ms    rtt min/avg/max/mdev = 0.042/0.104/0.226/0.086 ms
sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-2.zk-hs.default.svc.cluster.local
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it account-6468847985-2fqpf -- ping zk-2.zk-hs.default.svc.cluster.local    PING zk-2.zk-hs.default.svc.cluster.local (10.244.1.11) 56(84) bytes of data.    64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=1 ttl=64 time=0.308 ms    64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=2 ttl=64 time=0.080 ms    64 bytes from zk-2.zk-hs.default.svc.cluster.local (10.244.1.11): icmp_seq=3 ttl=64 time=0.295 ms    ^C    --- zk-2.zk-hs.default.svc.cluster.local ping statistics ---    3 packets transmitted, 3 received, 0% packet loss, time 2024ms    rtt min/avg/max/mdev = 0.080/0.227/0.308/0.105 ms

4.验证集群功能

4.1.在0容器创建数据

进入0容器，执行zkCli.sh客户端，执行create /zk-test hsssss， 获取一下是否看对不对get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- /bin/bash    root@zk-0:/# zkCli.sh    Connecting to localhost:2181    2023-01-31 08:49:55,163 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT    2023-01-31 08:49:55,166 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=zk-0.zk-hs.default.svc.cluster.local    2023-01-31 08:49:55,167 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131    2023-01-31 08:49:55,170 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation    2023-01-31 08:49:55,170 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre    2023-01-31 08:49:55,170 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:    2023-01-31 08:49:55,171 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib    2023-01-31 08:49:55,171 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp    2023-01-31 08:49:55,171 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=    2023-01-31 08:49:55,172 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux    2023-01-31 08:49:55,172 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64    2023-01-31 08:49:55,172 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=5.15.0-50-generic    2023-01-31 08:49:55,173 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root    2023-01-31 08:49:55,173 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root    2023-01-31 08:49:55,173 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/    2023-01-31 08:49:55,175 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0    Welcome to ZooKeeper!    2023-01-31 08:49:55,234 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)    JLine support is enabled    2023-01-31 08:49:55,410 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session    [zk: localhost:2181(CONNECTING) 0] 2023-01-31 08:49:55,494 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x18606fc8b4a0000, negotiated timeout = 30000        WATCHER::        WatchedEvent state:SyncConnected type:None path:null        [zk: localhost:2181(CONNECTED) 0]    [zk: localhost:2181(CONNECTED) 0] create /zk-test hsssss    Created /zk-test    [zk: localhost:2181(CONNECTED) 1] get /zk-test    hsssss    cZxid = 0x100000002    ctime = Tue Jan 31 08:50:53 UTC 2023    mZxid = 0x100000002    mtime = Tue Jan 31 08:50:53 UTC 2023    pZxid = 0x100000002    cversion = 0    dataVersion = 0    aclVersion = 0    ephemeralOwner = 0x0    dataLength = 6    numChildren = 0

4.2.在1容器获取数据

进入1容器，执行zkCli.sh客户端，获取数据验证get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-1 -- /bin/bash    root@zk-1:/# zkCli.sh    Connecting to localhost:2181    2023-01-31 08:51:55,701 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT    2023-01-31 08:51:55,710 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=zk-1.zk-hs.default.svc.cluster.local    2023-01-31 08:51:55,713 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131    2023-01-31 08:51:55,717 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation    2023-01-31 08:51:55,721 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre    2023-01-31 08:51:55,721 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:    2023-01-31 08:51:55,722 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib    2023-01-31 08:51:55,722 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp    2023-01-31 08:51:55,722 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=    2023-01-31 08:51:55,723 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux    2023-01-31 08:51:55,723 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64    2023-01-31 08:51:55,724 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=5.15.0-50-generic    2023-01-31 08:51:55,725 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root    2023-01-31 08:51:55,725 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root    2023-01-31 08:51:55,726 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/    2023-01-31 08:51:55,730 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0    Welcome to ZooKeeper!    2023-01-31 08:51:55,777 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)    JLine support is enabled    2023-01-31 08:51:55,943 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session    [zk: localhost:2181(CONNECTING) 0] 2023-01-31 08:51:56,014 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x28606fc8ba00000, negotiated timeout = 30000        WATCHER::        WatchedEvent state:SyncConnected type:None path:null        [zk: localhost:2181(CONNECTED) 0] get /zk-test    hsssss    cZxid = 0x100000002    ctime = Tue Jan 31 08:50:53 UTC 2023    mZxid = 0x100000002    mtime = Tue Jan 31 08:50:53 UTC 2023    pZxid = 0x100000002    cversion = 0    dataVersion = 0    aclVersion = 0    ephemeralOwner = 0x0    dataLength = 6    numChildren = 0

可以取到/zk-test对应的数据 hsssss

4.3.删除pod，验证pod挂掉验证集群是否能恢复正常：

qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl get pods -l app=zk    NAME   READY   STATUS    RESTARTS   AGE    zk-0   1/1     Running   0          15m    zk-1   1/1     Running   0          15m    zk-2   1/1     Running   0          15m
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl delete pods zk-1 zk-0    pod "zk-1" deleted    pod "zk-0" deleted
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl get pods -l app=zk -w    NAME   READY   STATUS    RESTARTS   AGE    zk-0   1/1     Running   0          65s    zk-1   1/1     Running   0          44s    zk-2   1/1     Running   0          16m

可以看到，zk-0,zk-1再删除以后会自动创建，集群能够恢复

4.4.验证恢复后的集群状态：

for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done
qiteck@server:~/program/docker_service/zookeeper$ for i in 0 1 2; do kubectl exec zk-$i -- zkServer.sh status; done    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: follower    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: leader    ZooKeeper JMX enabled by default    Using config: /usr/bin/../etc/zookeeper/zoo.cfg    Mode: follower

4.5.验证新的节点数据是否正常：

再次进入0容器，执行zkCli.sh客户端，获取数据get /zk-test
qiteck@server:~/program/docker_service/zookeeper$ sudo kubectl exec -it zk-0 -- /bin/bash    root@zk-0:/# zkCli.sh    Connecting to localhost:2181    2023-01-31 09:00:14,553 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT    2023-01-31 09:00:14,556 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=zk-0.zk-hs.default.svc.cluster.local    2023-01-31 09:00:14,556 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/usr/bin/../build/classes:/usr/bin/../build/lib/*.jar:/usr/bin/../share/zookeeper/zookeeper-3.4.10.jar:/usr/bin/../share/zookeeper/slf4j-log4j12-1.6.1.jar:/usr/bin/../share/zookeeper/slf4j-api-1.6.1.jar:/usr/bin/../share/zookeeper/netty-3.10.5.Final.jar:/usr/bin/../share/zookeeper/log4j-1.2.16.jar:/usr/bin/../share/zookeeper/jline-0.9.94.jar:/usr/bin/../src/java/lib/*.jar:/usr/bin/../etc/zookeeper:    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp    2023-01-31 09:00:14,559 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=    2023-01-31 09:00:14,560 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux    2023-01-31 09:00:14,560 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64    2023-01-31 09:00:14,560 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=5.15.0-50-generic    2023-01-31 09:00:14,560 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root    2023-01-31 09:00:14,560 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root    2023-01-31 09:00:14,561 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/    2023-01-31 09:00:14,562 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0    Welcome to ZooKeeper!    2023-01-31 09:00:14,594 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)    JLine support is enabled    2023-01-31 09:00:14,738 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session    [zk: localhost:2181(CONNECTING) 0] 2023-01-31 09:00:14,808 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x186070b91d80000, negotiated timeout = 30000        WATCHER::        WatchedEvent state:SyncConnected type:None path:null        [zk: localhost:2181(CONNECTED) 0] get /zk-test    hsssss    cZxid = 0x100000002    ctime = Tue Jan 31 08:50:53 UTC 2023    mZxid = 0x100000002    mtime = Tue Jan 31 08:50:53 UTC 2023    pZxid = 0x100000002    cversion = 0    dataVersion = 0    aclVersion = 0    ephemeralOwner = 0x0    dataLength = 6    numChildren = 0

可以看到获取zk-test的数据还是hssss

至此zookeeper的功能是正常的。

关键词： 数据验证 是否正常 配置文件