官方地址 https://kubernetes.io/zh/docs/tutorials/stateful-application/zookeeper/

k8s环境中一键拉起zk集群，解决传统方式部署的繁琐

规划

1、编辑yaml文件

方法1l <-- 不推荐

cat zk.yam

apiVersion: v1
kind: Service
metadata:
  name: zk-hs
  labels:
    app: zk
spec:
  selector:
    app: zk
  clusterIP: None
  ports:
  - name: server
    port: 2888
  - name: leader-election
    port: 3888
--- 
apiVersion: v1
kind: Service
metadata:
  name: zk-cs
  labels:
    app: zk
spec:
  selector:
    app: zk
  type: NodePort
  ports:
  - name: client
    port: 2181
    nodePort: 32181
---
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: Parallel
  template:
    metadata:
      labels:
        app: zk 
    spec:
      containers:
      - name: zk
        imagePullPolicy: IfNotPresent
        image: leolee32/kubernetes-library:kubernetes-zookeeper1.0-3.4.10
        resources:
          requests:
            memory: "512Mi"
            cpu: "500m"
          limits: 
            cpu: 1000m                     
            memory: 1024Mi
        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
      volumes:
      - name: datadir
        emptyDir: {}

方法2l <-- 推荐 （官方的镜像拉不到，就使用的国内的代理）

cat zk.yaml

apiVersion: v1
kind: Service
metadata:
  name: zk-hs
  labels:
    app: zk
spec:
  selector:
    app: zk
  clusterIP: None
  ports:
  - name: server
    port: 2888
  - name: leader-election
    port: 3888
--- 
apiVersion: v1
kind: Service
metadata:
  name: zk-cs
  labels:
    app: zk
spec:
  selector:
    app: zk
  type: NodePort
  ports:
  - name: client
    port: 2181
    nodePort: 32181
---
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: Parallel
  template:
    metadata:
      labels:
        app: zk 
    spec:
      containers:
      - name: zk
        imagePullPolicy: IfNotPresent
        image:  mirrorgooglecontainers/kubernetes-zookeeper:1.0-3.4.10                ##就这里不一样，其余的都一样
        resources:
          requests:
            memory: "512Mi"
            cpu: "500m"
          limits: 
            cpu: 1000m                     
            memory: 1024Mi
        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
      volumes:
      - name: datadir
        emptyDir: {}

2、查看pod

kubectl  get pod  |grep -i zk

zk-0            1/1     Running   0              4m41s
zk-1            1/1     Running   0              4m41s
zk-2            1/1     Running   0              4m41s

3、进入验证

kubectl  exec   -it  zk-1 -- /bin/bash

root@zk-1:/# /opt/zookeeper/bin/zkServer.sh    status 
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: leader