从零到一k8s(附件)zookeeper部署

使用sts简单安装zookeeper 集群

创建集群

点击查看代码

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-cs
  labels:
    app: zk
spec:
  ports:
  - port: 2181
    name: client
  selector:
    app: zk
---
apiVersion: policy/v1beta1
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:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                    - zk
              topologyKey: "kubernetes.io/hostname"
      containers:
      - name: kubernetes-zookeeper
        imagePullPolicy: Always
        image: "k8s.gcr.io/kubernetes-zookeeper:1.0-3.4.10"
        resources:
          requests:
            memory: "1Gi"
            cpu: "0.5"
        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
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 10Gi

查看集群配置

点击查看代码

root@us-test00:~# for i in 0 1 2; do echo "myid zk-$i";kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done
myid zk-0
1
myid zk-1
2
myid zk-2
3
root@us-test00:~# for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done
zk-0.zk-hs.default.svc.xlqforever.com
zk-1.zk-hs.default.svc.xlqforever.com
zk-2.zk-hs.default.svc.xlqforever.com
root@us-test00:~# kubectl exec 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.xlqforever.com:2888:3888
server.2=zk-1.zk-hs.default.svc.xlqforever.com:2888:3888
server.3=zk-2.zk-hs.default.svc.xlqforever.com:2888:3888

操作数据

点击查看代码

root@us-test00:~# kubectl exec zk-0 zkCli.sh create /hello world
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
Connecting to localhost:2181
2020-09-10 07:07:34,767 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
2020-09-10 07:07:34,771 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=zk-0.zk-hs.default.svc.xlqforever.com
2020-09-10 07:07:34,771 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131
2020-09-10 07:07:34,773 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2020-09-10 07:07:34,773 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2020-09-10 07:07:34,773 [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:
2020-09-10 07:07:34,774 [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
2020-09-10 07:07:34,774 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2020-09-10 07:07:34,774 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
2020-09-10 07:07:34,774 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2020-09-10 07:07:34,774 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2020-09-10 07:07:34,775 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=5.4.0-1070-azure
2020-09-10 07:07:34,775 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=zookeeper
2020-09-10 07:07:34,775 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/home/zookeeper
2020-09-10 07:07:34,775 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/
2020-09-10 07:07:34,777 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@22d8cfe0
2020-09-10 07:07:34,796 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2020-09-10 07:07:34,852 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socket connection established to localhost/127.0.0.1:2181, initiating session
2020-09-10 07:07:34,861 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x17f72a31a9c0001, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
Node already exists: /hello