docker-compose搭建zookeeper伪集群

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2021 年 11 月 10 日

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# docker-compose搭建zookeeper伪集群（1主2从）

---

## 1.安装docker-compose

安装手册可见docker-compose官网

[docker-compose官网](https://docs.docker.com/compose/install/ "参考资料")

</div>

运行此命令以下载 Docker Compose 的当前稳定版本：

```shell
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
```

对二进制文件应用可执行权限：

```shell
sudo chmod +x /usr/local/bin/docker-compose
```

## 2.准备docker-compose.yml文件

#### 2.1创建目录存放zookeeper的data和datalog

```shell
mkdir zookeeper
```

#### 2.2创建docker-compose.yml文件

```shell
vim docker-compose.yml
```

#### 2.3编写docker-compose.yml

```yaml
version: '3.1'
services:
  zoo1:
    image: zookeeper:3.7
    hostname: zoo1
    container_name: zoo1
    ports:
      - 2004:2181
    volumes:
      - $PWD/zk1/data:/data
      - $PWD/zk1/datalog:/datalog
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181

zoo2:
    image: zookeeper:3.7
    hostname: zoo2
    container_name: zoo2
    ports:
      - 2005:2181
    volumes:
      - $PWD/zk2/data:/data
      - $PWD/zk2/datalog:/datalog
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181

zoo3:
    image: zookeeper:3.7
    hostname: zoo3
    container_name: zoo3
    ports:
      - 2006:2181
    volumes:
      - $PWD/zk3/data:/data
      - $PWD/zk3/datalog:/datalog
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
```

## 3.启动zookeeper集群

#### 3.1启动命令

```shell
$ docker-compose -f zookeeper-compose.yml up -d
```

#### 3.2查看zookeeper状况

```shell
//进入zoo1容器
docker exec -it zoo1 /bin/bash
//进入bin目录
cd bin
//查看zookeeper启动情况
./zkServer.sh status
```

zoo1

```shell
root@zoo1:/apache-zookeeper-3.7.0-bin/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
```

zoo2

```shell
root@zoo2:/apache-zookeeper-3.7.0-bin# cd bin
root@zoo2:/apache-zookeeper-3.7.0-bin/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
```

zoo3

```shell
root@zoo3:/apache-zookeeper-3.7.0-bin# cd bin
root@zoo3:/apache-zookeeper-3.7.0-bin/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: leader
```

由此可见三个服务都启动起来了，zoo3为主节点，zoo1和zoo2为从节点

最后修改：2021 年 11 月 15 日