zookeeper docker集群怎样启动运行 - 问答

要启动并运行一个ZooKeeper Docker集群，您需要遵循以下步骤：

准备环境：确保您已经安装了Docker和Docker Compose。如果没有，请访问Docker官网（https://www.docker.com/）下载并安装适合您操作系统的Docker版本。Docker Compose是一个用于定义和运行多容器Docker应用程序的工具，您可以从Docker官网（https://docs.docker.com/compose/install/）下载并安装它。
创建Docker Compose文件：在您的项目目录中创建一个名为docker-compose.yml的文件，然后添加以下内容：

version: '3'
services:
  zookeeper1:
    image: zookeeper:3.7.0
    container_name: zookeeper1
    ports:
      - "2181:2181"
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=zookeeper1:2888:3888

  zookeeper2:
    image: zookeeper:3.7.0
    container_name: zookeeper2
    ports:
      - "2182:2181"
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zookeeper1:2888:3888,server.2=zookeeper2:2888:3888

  zookeeper3:
    image: zookeeper:3.7.0
    container_name: zookeeper3
    ports:
      - "2183:2181"
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zookeeper1:2888:3888,server.2=zookeeper2:2888:3888,server.3=zookeeper3:2888:3888

这个文件定义了一个包含三个ZooKeeper容器的Docker Compose应用程序。每个容器都使用zookeeper:3.7.0镜像，并映射到主机的不同端口。环境变量ZOO_MY_ID用于设置每个节点的ID，而ZOO_SERVERS用于配置服务器之间的连接。

启动ZooKeeper集群：在包含docker-compose.yml文件的目录中，打开终端或命令提示符，运行以下命令：

docker-compose up -d

这将启动并运行ZooKeeper集群。-d标志表示以分离模式运行容器。

验证集群状态：要验证ZooKeeper集群是否正常运行，您可以访问其中一个容器并检查其日志。运行以下命令：

docker logs zookeeper1

您应该看到类似以下的输出，表明ZooKeeper已正确启动并运行：

2021-XX-XX 12:34:56,789 [myid:1] - INFO  zookeeper.server.quorum.QuorumPeerMain  - Starting quorum peer
2021-XX-XX 12:34:56,790 [myid:1] - INFO  zookeeper.server.quorum.QuorumPeerConfig  - Reading configuration from file:/conf/zoo.cfg
2021-XX-XX 12:34:56,791 [myid:1] - WARN  zookeeper.server.quorum.QuorumPeerMain  - Either no config file was specified, or the specified config file does not exist.
2021-XX-XX 12:34:56,791 [myid:1] - INFO  zookeeper.server.quorum.QuorumPeerMain  - Configuring server to run in standalone mode
2021-XX-XX 12:34:56,792 [myid:1] - INFO  zookeeper.server.quorum.QuorumPeerMain  - Starting server

现在您已经成功启动并运行了一个ZooKeeper Docker集群。您可以开始使用它来存储和管理分布式应用程序的元数据。

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