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本章内容主要介绍部署一个双主双从的rocketmq集群

关键配置说明

NameServer：负责服务发现和路由管理。
Broker：

• Master Broker 负责消息的写入和读取。
• Slave Broker 负责从 Master 同步数据，提供高可用性。
  RocketMQ Console：提供 Web 管理界面，方便监控和管理集群。（如果拉取镜像失败，则先注释掉）
  数据持久化：通过挂载卷（volumes）将 Broker 的日志和数据存储到宿主机，确保数据持久化。

我们需要按如下目录去创建文件夹和文件

/tmp/rocketmq-cluster/
├── docker-compose.yml
├── Dockerfile
├── entrypoint.sh
├── broker-master1/
│   ├── conf/
│   │   └── broker.conf
│   ├── logs/
│   └── store/
├── broker-slave1/
│   ├── conf/
│   │   └── broker.conf
│   ├── logs/
│   └── store/
├── broker-master2/
│   ├── conf/
│   │   └── broker.conf
│   ├── logs/
│   └── store/
└── broker-slave2/├── conf/│   └── broker.conf├── logs/└── store/

Dockerfile

通用的 RocketMQ Dockerfile，用于构建 NameServer 和 Broker 的镜像

# 使用官方的 OpenJDK 镜像作为基础镜像
FROM openjdk:8-jdk-alpine# 设置 RocketMQ 版本
ENV ROCKETMQ_VERSION=4.9.4# 安装必要的工具
RUN apk add --no-cache bash curl# 下载并解压 RocketMQ
RUN mkdir -p /opt/rocketmq \&& cd /opt/rocketmq \&& curl -O https://archive.apache.org/dist/rocketmq/${ROCKETMQ_VERSION}/rocketmq-all-${ROCKETMQ_VERSION}-bin-release.zip \&& unzip rocketmq-all-${ROCKETMQ_VERSION}-bin-release.zip \&& mv rocketmq-all-${ROCKETMQ_VERSION}-bin-release/* . \&& rm -rf rocketmq-all-${ROCKETMQ_VERSION}-bin-release.zip rocketmq-all-${ROCKETMQ_VERSION}-bin-release# 设置环境变量
ENV ROCKETMQ_HOME=/opt/rocketmq
ENV PATH=${ROCKETMQ_HOME}/bin:${PATH}# 暴露端口
# NameServer 默认端口：9876
# Broker 默认端口：10911（Broker）、10909（主从同步）、10912（HA）
EXPOSE 9876 10911 10909 10912# 设置工作目录
WORKDIR ${ROCKETMQ_HOME}# 启动脚本
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh# 启动 NameServer 或 Broker
ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

这是一个启动脚本，用于根据环境变量启动 NameServer 或 Broker：

#!/bin/bash# 根据环境变量启动 NameServer 或 Broker
if [ "$ROCKETMQ_ROLE" = "namesrv" ]; thenecho "Starting NameServer..."${ROCKETMQ_HOME}/bin/mqnamesrv
elif [ "$ROCKETMQ_ROLE" = "broker" ]; thenecho "Starting Broker..."${ROCKETMQ_HOME}/bin/mqbroker -c ${ROCKETMQ_HOME}/conf/broker.conf
elseecho "Unknown role: $ROCKETMQ_ROLE"exit 1
fi

Broker 配置文件

master1的broker.conf文件

brokerClusterName=DefaultCluster
brokerName=broker-a
brokerId=0
deleteWhen=04
fileReservedTime=48
brokerRole=SYNC_MASTER
flushDiskType=ASYNC_FLUSH
namesrvAddr=namesrv1:9876;namesrv2:9876
listenPort=10911
storePathRootDir=/opt/rocketmq/store/broker-master1

master2的broker.conf文件

brokerClusterName=DefaultCluster
brokerName=broker-b
brokerId=0
deleteWhen=04
fileReservedTime=48
brokerRole=SYNC_MASTER
flushDiskType=ASYNC_FLUSH
namesrvAddr=namesrv1:9876;namesrv2:9876
listenPort=10912
storePathRootDir=/opt/rocketmq/store/broker-master2

salve1的broker.conf文件

brokerClusterName=DefaultCluster
brokerName=broker-a
brokerId=1
deleteWhen=04
fileReservedTime=48
brokerRole=SLAVE
flushDiskType=ASYNC_FLUSH
namesrvAddr=namesrv1:9876;namesrv2:9876
listenPort=10921
storePathRootDir=/opt/rocketmq/store/broker-slave1

salve2的broker.conf文件

brokerClusterName=DefaultCluster
brokerName=broker-b
brokerId=1
deleteWhen=04
fileReservedTime=48
brokerRole=SLAVE
flushDiskType=ASYNC_FLUSH
namesrvAddr=namesrv1:9876;namesrv2:9876
listenPort=10922
storePathRootDir=/opt/rocketmq/store/broker-slave2

docker-compose.yml

用于部署双主双从的 RocketMQ 集群

version: '3.8'services:# NameServer 1namesrv1:build: .container_name: rocketmq-namesrv1environment:- ROCKETMQ_ROLE=namesrvports:- "9876:9876"networks:- rocketmq-net# NameServer 2namesrv2:build: .container_name: rocketmq-namesrv2environment:- ROCKETMQ_ROLE=namesrvports:- "9877:9876"networks:- rocketmq-net# Broker Master 1broker-master1:build: .container_name: rocketmq-broker-master1environment:- ROCKETMQ_ROLE=brokervolumes:- /tmp/rocketmq-cluster/broker-master1/conf/broker.conf:/opt/rocketmq/conf/broker.conf- /tmp/rocketmq-cluster/broker-master1/logs:/opt/rocketmq/logs- /tmp/rocketmq-cluster/broker-master1/store:/opt/rocketmq/storeports:- "10911:10911"- "10909:10909"depends_on:- namesrv1- namesrv2networks:- rocketmq-net# Broker Slave 1broker-slave1:build: .container_name: rocketmq-broker-slave1environment:- ROCKETMQ_ROLE=brokervolumes:- /tmp/rocketmq-cluster/broker-slave1/conf/broker.conf:/opt/rocketmq/conf/broker.conf- /tmp/rocketmq-cluster/broker-slave1/logs:/opt/rocketmq/logs- /tmp/rocketmq-cluster/broker-slave1/store:/opt/rocketmq/storeports:- "10921:10911"- "10919:10909"depends_on:- namesrv1- namesrv2networks:- rocketmq-net# Broker Master 2broker-master2:build: .container_name: rocketmq-broker-master2environment:- ROCKETMQ_ROLE=brokervolumes:- /tmp/rocketmq-cluster/broker-master2/conf/broker.conf:/opt/rocketmq/conf/broker.conf- /tmp/rocketmq-cluster/broker-master2/logs:/opt/rocketmq/logs- /tmp/rocketmq-cluster/broker-master2/store:/opt/rocketmq/storeports:- "10912:10911"- "10910:10909"depends_on:- namesrv1- namesrv2networks:- rocketmq-net# Broker Slave 2broker-slave2:build: .container_name: rocketmq-broker-slave2environment:- ROCKETMQ_ROLE=brokervolumes:- /tmp/rocketmq-cluster/broker-slave2/conf/broker.conf:/opt/rocketmq/conf/broker.conf- /tmp/rocketmq-cluster/broker-slave2/logs:/opt/rocketmq/logs- /tmp/rocketmq-cluster/broker-slave2/store:/opt/rocketmq/storeports:- "10922:10911"- "10920:10909"depends_on:- namesrv1- namesrv2networks:- rocketmq-net# RocketMQ Console（可选）console:image: apacherocketmq/rocketmq-console:2.0.0container_name: rocketmq-consoleports:- "8080:8080"environment:- JAVA_OPTS=-Drocketmq.namesrv.addr=namesrv1:9876;namesrv2:9876depends_on:- namesrv1- namesrv2networks:- rocketmq-netnetworks:rocketmq-net:driver: bridge

部署步骤

构建镜像：

运行以下命令构建镜像：

docker-compose build

启动集群：

docker-compose up -d

查看服务启动情况

docker ps

如果启动失败，查看对应的容器日志

rocketmq-broker-master1是对应的容器名

docker logs rocketmq-broker-master1

关闭容器并删除镜像

如果要重新构建镜像，则可以通过下面这行命令

docker-compose down