介绍如何使用Docker-compose快速部署一个单节点单副本 RocketMQ 服务,并完成简单的消息收发。
docker-compose.yml
version: '3.8'
services:
# NameServer 服务
namesrv:
image: apache/rocketmq:5.3.1
container_name: rmqnamesrv
ports:
- "9876:9876"
networks:
- rocketmq
environment:
- JAVA_OPTS=-Duser.home=/opt
command: sh mqnamesrv
restart: always
# Broker 服务
broker:
image: apache/rocketmq:5.3.1
container_name: rmqbroker
ports:
- "10909:10909"
- "10911:10911"
- "10912:10912"
networks:
- rocketmq
environment:
- NAMESRV_ADDR=rmqnamesrv:9876 # 使用容器名称连接 NameServer
depends_on:
- namesrv
command: sh mqbroker
restart: always
# RocketMQ 控制台
rocketmq-dashboard:
image: apacherocketmq/rocketmq-dashboard:latest
container_name: rocketmq-dashboard
ports:
- "8088:8080"
networks:
- rocketmq
environment:
- JAVA_OPTS=-Drocketmq.namesrv.addr=rmqnamesrv:9876 # 配置 NameServer 地址
depends_on:
- namesrv
- broker
restart: always
proxy:
image: apache/rocketmq:5.3.1
container_name: rmqproxy
networks:
- rocketmq
depends_on:
- broker
- namesrv
ports:
- 8080:8080
- 8081:8081
restart: on-failure
environment:
- NAMESRV_ADDR=rmqnamesrv:9876
command: sh mqproxy
networks:
rocketmq:
driver: bridge
启动RocketMQ
docker-compose up -d
查看启动日志
docker-compose logs -f
新增主题
控制台新增主题
服务中新增主题
进入broker容器,通过mqadmin创建 Topic
docker exec -it rmqbroker bash
sh mqadmin updatetopic -t TestTopic -c DefaultCluster
测试消息生产和发送
引入依赖
<dependency>
<groupId>org.apache.rocketmq</groupId>
<artifactId>rocketmq-client-java</artifactId>
<version>5.0.6</version>
</dependency>
测试生产者
package cn.bdmcom.product;
import org.apache.rocketmq.client.apis.ClientConfiguration;
import org.apache.rocketmq.client.apis.ClientConfigurationBuilder;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.client.apis.ClientServiceProvider;
import org.apache.rocketmq.client.apis.message.Message;
import org.apache.rocketmq.client.apis.producer.Producer;
import org.apache.rocketmq.client.apis.producer.SendReceipt;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ProducerExample {
private static final Logger logger = LoggerFactory.getLogger(ProducerExample.class);
public static void main(String[] args) throws ClientException {
// 接入点地址,需要设置成Proxy的地址和端口列表,一般是xxx:8080;xxx:8081
String endpoint = "192.168.59.129:8080";
// 消息发送的目标Topic名称,需要提前创建。
String topic = "TestTopic";
ClientServiceProvider provider = ClientServiceProvider.loadService();
ClientConfigurationBuilder builder = ClientConfiguration.newBuilder().setEndpoints(endpoint);
ClientConfiguration configuration = builder.enableSsl(false).build();
// 初始化Producer时需要设置通信配置以及预绑定的Topic。
Producer producer = provider.newProducerBuilder()
.setTopics(topic)
.setClientConfiguration(configuration)
.build();
// 普通消息发送。
Message message = provider.newMessageBuilder()
.setTopic(topic)
// 设置消息索引键,可根据关键字精确查找某条消息。
.setKeys("messageKey")
// 设置消息Tag,用于消费端根据指定Tag过滤消息。
.setTag("messageTag")
// 消息体。
.setBody("messageBody".getBytes())
.build();
try {
// 发送消息,需要关注发送结果,并捕获失败等异常。
SendReceipt sendReceipt = producer.send(message);
logger.info("Send message successfully, messageId={}", sendReceipt.getMessageId());
} catch (ClientException e) {
logger.error("Failed to send message", e);
}
// producer.close();
}
}
测试消费者
package cn.bdmcom.consumer;
import java.io.IOException;
import java.util.Collections;
import org.apache.rocketmq.client.apis.ClientConfiguration;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.client.apis.ClientServiceProvider;
import org.apache.rocketmq.client.apis.consumer.ConsumeResult;
import org.apache.rocketmq.client.apis.consumer.FilterExpression;
import org.apache.rocketmq.client.apis.consumer.FilterExpressionType;
import org.apache.rocketmq.client.apis.consumer.PushConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PushConsumerExample {
private static final Logger logger = LoggerFactory.getLogger(PushConsumerExample.class);
private PushConsumerExample() {
}
public static void main(String[] args) throws ClientException, IOException, InterruptedException {
final ClientServiceProvider provider = ClientServiceProvider.loadService();
// 接入点地址,需要设置成Proxy的地址和端口列表,一般是xxx:8080;xxx:8081
String endpoint = "192.168.59.129:8080";
ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
.setEndpoints(endpoint)
.build();
// 订阅消息的过滤规则,表示订阅所有Tag的消息。
String tag = "*";
FilterExpression filterExpression = new FilterExpression(tag, FilterExpressionType.TAG);
// 为消费者指定所属的消费者分组,Group需要提前创建。
String consumerGroup = "DefaultCluster";
// 指定需要订阅哪个目标Topic,Topic需要提前创建。
String topic = "TestTopic";
// 初始化PushConsumer,需要绑定消费者分组ConsumerGroup、通信参数以及订阅关系。
PushConsumer pushConsumer = provider.newPushConsumerBuilder()
.setClientConfiguration(clientConfiguration)
// 设置消费者分组。
.setConsumerGroup(consumerGroup)
// 设置预绑定的订阅关系。
.setSubscriptionExpressions(Collections.singletonMap(topic, filterExpression))
// 设置消费监听器。
.setMessageListener(messageView -> {
// 处理消息并返回消费结果。
logger.info("Consume message successfully, messageId={}", messageView.getMessageId());
return ConsumeResult.SUCCESS;
})
.build();
Thread.sleep(Long.MAX_VALUE);
// 如果不需要再使用 PushConsumer,可关闭该实例。
// pushConsumer.close();
}
}
问题解决
镜像不可用
镜像源拉不下来,可以使用以下参考:
vim /etc/docker/daemon.json
{
"registry-mirrors": [
"https://dockerpull.org",
"https://docker.1panel.dev",
"https://docker.fxxk.dedyn.io",
"https://docker.xn--6oq72ry9d5zx.cn",
"https://docker.zhai.cm",
"https://docker.5z5f.com",
"https://a.ussh.net",
"https://docker.cloudlayer.icu",
"https://hub.littlediary.cn",
"https://hub.crdz.gq",
"https://docker.unsee.tech",
"https://docker.kejilion.pro",
"https://registry.dockermirror.com",
"https://hub.rat.dev",
"https://dhub.kubesre.xyz",
"https://docker.nastool.de",
"https://docker.udayun.com",
"https://docker.rainbond.cc",
"https://hub.geekery.cn",
"https://docker.1panelproxy.com",
"https://atomhub.openatom.cn",
"https://docker.m.daocloud.io"
]
}
虚拟机内存不足
假如内存飙升100%,需要进行扩容
可以扩展卷组来使用新的磁盘空间:
sudo vgextend ubuntu-vg /dev/sda
接下来,扩展逻辑卷,以便利用新增的空间:
sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
完成上述操作后,检查文件系统和逻辑卷的大小:
lvdisplay /dev/ubuntu-vg/ubuntu-lv