创建与管理 Kafka 集群

Apache Kafka 入门

Mike Metzger

Data Engineering Consultant

什么是 ZooKeeper？

  • ZooKeeper 是用于管理信息并提供运行分布式系统所需服务的框架
  • 主要供开发者构建分布式应用
    • 用户与 ZooKeeper 交互
  • 示例应用
    • Kafka
    • Hadoop
    • Neo4j

Apache_ZooKeeper_logo.svg.png

Apache Kafka 入门

ZooKeeper 的作用

  • ZooKeeper 提供运行分布式应用所需的服务
    • 配置管理
    • 系统命名
    • 跨系统同步
    • 组内服务
  • 作为框架设计，避免各分布式应用各自实现这些服务
    • 类似通用连接器，如电源插头或水管喷嘴
Apache Kafka 入门

ZooKeeper 与 Kafka

  • Kafka 使用 ZooKeeper 进行集群管理
    • 新版本 Kafka 可使用 KRaft
  • 使用两个文件
    • config/zookeeper.properties
    • config/server.properties
# zookeeper.properties

# The directory where the 
# snapshot is stored.
dataDir=/tmp/zookeeper

# The port at which the clients 
# will connect
clientPort=2181

...
Apache Kafka 入门

config/server.properties

  • 处理 Kafka 专有配置
    • Broker 详情
    • 网络配置
    • 事件存储位置
    • 基本主题配置（含副本）
...
# A comma separated list of directories under which to store log files
log.dirs=/tmp/kafka-logs
# The default number of log partitions per topic.
num.partitions=1
Apache Kafka 入门

启动 Kafka 集群

  • Kafka 集群分两步启动
$ bin/zookeeper-server-start.sh config/zookeeper.properties

...
INFO   ______                  _                                           (org.apache.zookeeper.server.ZooKeeperServer)
INFO  |___  /                 | |                                          (org.apache.zookeeper.server.ZooKeeperServer)
INFO     / /    ___     ___   | | __   ___    ___   _ __     ___   _ __    (org.apache.zookeeper.server.ZooKeeperServer)
INFO    / /    / _ \   / _ \  | |/ /  / _ \  / _ \ | '_ \   / _ \ | '__| (org.apache.zookeeper.server.ZooKeeperServer)
INFO   / /__  | (_) | | (_) | |   <  |  __/ |  __/ | |_) | |  __/ | |     (org.apache.zookeeper.server.ZooKeeperServer)
INFO  /_____|  \___/   \___/  |_|\_\  \___|  \___| | .__/   \___| |_| (org.apache.zookeeper.server.ZooKeeperServer)
INFO                                               | |                      (org.apache.zookeeper.server.ZooKeeperServer)
INFO                                               |_|                      (org.apache.zookeeper.server.ZooKeeperServer)
INFO  (org.apache.zookeeper.server.ZooKeeperServer)
...
Apache Kafka 入门

启动 Kafka 集群（续）

$ bin/kafka-server-start.sh config/server.properties

INFO Awaiting socket connections on 0.0.0.0:9092. (kafka.network.DataPlaneAcceptor)
INFO Kafka version: 3.7.0 (org.apache.kafka.common.utils.AppInfoParser)
INFO Kafka commitId: 2ae524ed625438c5 (org.apache.kafka.common.utils.AppInfoParser)
INFO Kafka startTimeMs: 1717502877829 (org.apache.kafka.common.utils.AppInfoParser)
INFO [KafkaServer id=0] started (kafka.server.KafkaServer)
INFO [zk-broker-0-to-controller-forwarding-channel-manager]: Recorded new controller, 
     from now on will use node 815f25786085:9092 (id: 0 ra
Apache Kafka 入门

停止 Kafka 集群

  • bin/kafka-server-stop.sh
  • bin/zookeeper-server-stop.sh
  • 注意停机顺序相反
Apache Kafka 入门

开始练习！

Apache Kafka 入门

Preparing Video For Download...