k8s(docker-desktop)简单搭建zookeeper三节点集群

前提
- 已经安装了docker-desktop，并且其中的kubernetes启动运行的。或者安装了k8s环境就行
- 可以正常下载dockerhub的镜像，这里采用了dockerhub官方制作的镜像
启动集群
- 执行命令 kubectl apply -f zk1.yaml，执行前先把/data的3个宿主机路径修改一下，把datadir的volumeMounts注释放开。不修改也可以启动集群

zk1.yaml文件如下

apiVersion: v1

kind: Service

metadata:

  name: zk1

  labels:

    zk: zk1

spec:

  selector:

    zk: zk1

  ports:

  - protocol: TCP

    port: 2181

    targetPort: 2181

    name: port-1

  - protocol: TCP

    port: 2888

    targetPort: 2888

    name: port-2

  - protocol: TCP

    port: 3888

    targetPort: 3888

    name: port-3

  type: NodePort

---

apiVersion: v1

kind: Service

metadata:

  name: zk2

  labels:

    zk: zk2

spec:

  selector:

    zk: zk2

  ports:

  - protocol: TCP

    port: 2181

    targetPort: 2181

    name: port-1

  - protocol: TCP

    port: 2888

    targetPort: 2888

    name: port-2

  - protocol: TCP

    port: 3888

    targetPort: 3888

    name: port-3

  type: NodePort

---

apiVersion: v1

kind: Service

metadata:

  name: zk3

  labels:

    zk: zk3

spec:

  selector:

    zk: zk3

  ports:

  - protocol: TCP

    port: 2181

    targetPort: 2181

    name: port-1

  - protocol: TCP

    port: 2888

    targetPort: 2888

    name: port-2

  - protocol: TCP

    port: 3888

    targetPort: 3888

    name: port-3

  type: NodePort

---

apiVersion: v1

kind: Pod

metadata:

  name: zk1

  namespace: default

  labels:

    zk: zk1

spec:

  containers:

  - image: zookeeper:3.6.3

    imagePullPolicy: IfNotPresent

    name: zk

    env:

    - name: ZOO_MY_ID

      value: "1"

    # 默认这个值，可以参考容器里面的entry.sh的内容

    # 也可以去dockerhub的链接去查看这个镜像的dockerfile

    # - name: ZOO_DATA_DIR

    #   value: "/data"

    - name: ZOO_INIT_LIMIT

      value: "5000"

    - name: ZOO_SYNC_LIMIT

      value: "2000"

    - name: JVMFLAGS

      value: "-Dzookeeper.electionPortBindRetry=50" # 连接集群重试50次，默认三次

    - name: ZOO_SERVERS

      value: "server.1=0.0.0.0:2888:3888;2181 server.2=zk2.default.svc.cluster.local:2888:3888;2181 server.3=zk3.default.svc.cluster.local:2888:3888;2181"

    ports:

    - containerPort: 2181

      protocol: TCP

      name: client

    - containerPort: 2888

      protocol: TCP

      name: server

    - containerPort: 3888

      protocol: TCP

      name: leader-election

    volumeMounts:

    # 这里用环境变量，zoo.cfg这个文件是不存在

    # - mountPath: /apache-zookeeper-3.6.3-bin/conf

    #  name: conf

    # 为什么一定是data 不是/tmp/zookeeper ZOO_DATA_DIR指定的

    # 不配置数据持久的话，把这个配置注释掉 最好配置，不然pod删了数据就没了

    #- mountPath: /data

    #  name: datadir

  volumes:

  #- name: conf

  #  hostPath:

  #    path: /XXXX/conf1XXXX

  - name: datadir

    hostPath:

    # 第一次启动最好是个空文件夹 配置自己的数据的路径，3个pod三个路径

      path: /XXXX/tmp1/zookeeper

    #  type: Directory

---

apiVersion: v1

kind: Pod

metadata:

  name: zk2

  namespace: default

  labels:

    zk: zk2

spec:

  containers:

  - image: zookeeper:3.6.3

    imagePullPolicy: IfNotPresent

    name: zk

    env:

    - name: ZOO_MY_ID

      value: "2"

    - name: ZOO_INIT_LIMIT

      value: "5000"

    - name: ZOO_SYNC_LIMIT

      value: "2000"

    - name: JVMFLAGS

      value: "-Dzookeeper.electionPortBindRetry=50"

    - name: ZOO_SERVERS

      value: "server.1=zk1.default.svc.cluster.local:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zk3.default.svc.cluster.local:2888:3888;2181"

      # 如果不把本机的ip改成0.0.0.0，会报错"server.1=zk1.default.svc.cluster.local:2888:3888;2181 server.2=zk2.default.svc.cluster.local:2888:3888;2181 server.3=zk3.default.svc.cluster.local:2888:3888;2181"

    ports:

    - containerPort: 2181

      protocol: TCP

      name: client

    - containerPort: 2888

      protocol: TCP

      name: server

    - containerPort: 3888

      protocol: TCP

      name: leader-election

    volumeMounts:

    # - mountPath: /apache-zookeeper-3.6.3-bin/conf

    #  name: conf

    #- mountPath: /data

     # name: datadir

  volumes:

  # - name: conf

  #  hostPath:

  #    path: /XXXX/conf2

  - name: datadir

    hostPath:

      path: /XXXX/tmp2/zookeeper

---

apiVersion: v1

kind: Pod

metadata:

  name: zk3

  namespace: default

  labels:

    zk: zk3

spec:

  containers:

  - image: zookeeper:3.6.3

    imagePullPolicy: IfNotPresent

    name: zk

    env:

    - name: ZOO_MY_ID

      value: "3"

    - name: ZOO_INIT_LIMIT

      value: "5000"

    - name: ZOO_SYNC_LIMIT

      value: "2000"

    - name: JVMFLAGS

      value: "-Dzookeeper.electionPortBindRetry=50"

    - name: ZOO_SERVERS

      value: "server.1=zk1.default.svc.cluster.local:2888:3888;2181 server.2=zk2.default.svc.cluster.local:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181"

    ports:

    - containerPort: 2181

      protocol: TCP

      name: client

    - containerPort: 2888

      protocol: TCP

      name: server

    - containerPort: 3888

      protocol: TCP

      name: leader-election

    volumeMounts:

    # - mountPath: /apache-zookeeper-3.6.3-bin/conf

    #  name: conf

    #- mountPath: /data

    #  name: datadir

  volumes:

  #- name: conf

  #  hostPath:

  #    path: /XXXX/conf3

  - name: datadir

    hostPath:

      path: /XXXX/tmp3/zookeeper

连接pod分别查看状态kubectl exec -it zk1 -- sh kubectl exec -it zk2 -- sh kubectl exec -it zk3 -- sh

# ./bin/zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /conf/zoo.cfg

Client port found: 2181. Client address: localhost. Client SSL: false.

Mode: follower

巴特西

k8s(docker-desktop)简单搭建zookeeper三节点集群

最新文章

热门文章