本章节将介绍怎样为 MinIO 中某个存储桶添加 AMQP 事件通知（这里将介绍使用 RabbitMQ 作为 AMQP 服务提供者）。
注意：由于 RabbitMQ 是采用 Erlang 语言编写的，需要先安装 Erlang 环境，下载地址 https://www.erlang.org/downloads
RabbitMQ 是实现了高级消息队列协议（AMQP）的开源消息代理软件。RabbitMQ 服务器是用 Erlang 语言编写的，而集群和故障转移是构建在开放电信平台框架上的。
访问 RabbitMQ 官网 https://www.rabbitmq.com/#getstarted 下载安装包，然后根据提示信息进行安装。
RabbitMQ 安装成功后接下来安装 RabbitMQ-Plugins。打开命令行 CMD，进入 %RABBITMQ_HOME%\rabbitmq_server-3.8.19\sbin 目录，执行如下脚本：
rabbitmq-plugins.bat enable rabbitmq_management
使用上面命令启动 rabbitmq_management 插件。如下图：
然后使用 rabbitmqctl status 命令查看 RabbitMQ 状态，如下图：
说明安装是成功的，且已经启动了，运行正常。
打开 MinIO 数据目录下面的 .minio.sys 目录，编辑 .minio.sys\config\config.json 文件。找到 “notify_amqp” 配置项，添加 RabbitMQ 配置信息。配置如下：
{
//...
"notify_amqp": {
"_": [{
"key": "enable",
"value": "on"
}, {
"key": "url",
"value": "amqp://localhost:5672"
}, {
"key": "exchange",
"value": "bucketevents"
}, {
"key": "exchange_type",
"value": "fanout"
}, {
"key": "routing_key",
"value": "bucketlogs"
}, {
"key": "mandatory",
"value": "off"
}, {
"key": "durable",
"value": "off"
}, {
"key": "no_wait",
"value": "off"
}, {
"key": "internal",
"value": "off"
}, {
"key": "auto_deleted",
"value": "off"
}, {
"key": "delivery_mode",
"value": "0"
}, {
"key": "publisher_confirms",
"value": "off"
}, {
"key": "queue_limit",
"value": "0"
}, {
"key": "queue_dir",
"value": ""
}
]
},
//...
}其中：
enable：是否启用该配置，on 表示启用；off 表示禁用
url：指定 AMQP 访问 URL，如：amqp://localhost:5672
exchange：指定 exchange 的名称
exchange_type：指定 exchange 的类型
routing_key：指定发布用的 Routing key
deliveryMode：指定发布方式。0或1 表示瞬态；2 表示持久太
完成上面配置后，启动 MinIO 服务；如果 MinIO 服务控制台输出“SQS ARNs: arn:minio:sqs::_:amqp”信息，则说明启动成功。
我们现在可以创建一个 images 存储桶，在该存储桶上面开启时间通知。一旦有文件被创建或者覆盖，就会项 AMQP 发送一个消息。
要配置这种存储桶通知，我们需要用到前面步骤 MinIO 输出的 ARN 信息“arn:minio:sqs::_:amqp”。
使用 mc 客户端执行如下脚本去开启通知：
# 使用客户端命令，在本地 MinIO 服务器中创建 images 存储桶 D:\server\minio>mc mb local/images Bucket created successfully `local/images`. # 为刚刚创建的 images 存储桶添加事件通知 # 使用 --suffix 选项指定仅仅上传/删除 jpg 格式图片才触发事件 D:\server\minio>mc event add local/images arn:minio:sqs::_:amqp --suffix=".jpg" Successfully added arn:minio:sqs::_:amqp # 查看 images 存储桶上面的事件 D:\server\minio>mc event list local/images arn:minio:sqs::_:amqp s3:ObjectCreated:*,s3:ObjectRemoved:*,s3:ObjectAccessed:* Filter: suffix=".jpg"
（1）使用 java 代码去订阅 bucketevents exchange。
a、pom.xml 依赖
<dependency> <groupId>com.rabbitmq</groupId> <artifactId>amqp-client</artifactId> <version>3.6.5</version> </dependency>
b、Java 代码如下：
package com.hxstrive.rabbitmq.demo;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
/**
* 消费者 —— 消费 MinIO 的通知消息
*
* @author Administrator
* @date 2021年7月27日 12:59:57
*/
public class Demo1 {
// 定义exchange名称
private static final String EXCHANGE_NAME = "bucketevents";
// 主机地址
private static final String HOST_NAME = "localhost";
// 模式
private static final String BIND_KEY = "*.bucketlogs";
public static void main(String[] args) throws Exception {
// 创建连接
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(HOST_NAME);
Connection connection = factory.newConnection();
// 获取一个通道
Channel channel = connection.createChannel();
// 声明一个类型为fanout的exchange
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
// 绑定Queue和Exchange
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, BIND_KEY);
System.out.println("Waiting Message...");
// 消费消息
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer);
while (true) {
QueueingConsumer.Delivery delivery = consumer.nextDelivery();
String routingKey = delivery.getEnvelope().getRoutingKey();
System.out.println("routingKey :: " + routingKey);
System.out.println(" body :: " + new String(delivery.getBody()) );
}
}
}运行上面 Java 代码，等待事件。
（2）使用浏览器访问 http://localhost:9000 ，使用 Access Key 和 Securet Key 登陆到后台。手动添加两张图片到 images 存储桶，如下图：
（3）查看 Java 代码收到的事件信息，如下：
routingKey :: bucketlogs
body :: {"EventName":"s3:ObjectRemoved:Delete","Key":"images/309667.jpg","Records":[{"eventVersion":"2.0","eventSource":"minio:s3","awsRegion":"","eventTime":"2021-07-28T05:04:08.071Z","eventName":"s3:ObjectRemoved:Delete","userIdentity":{"principalId":"root"},"requestParameters":{"accessKey":"root","principalId":"root","region":"","sourceIPAddress":"::1"},"responseElements":{"x-amz-request-id":"","x-minio-deployment-id":"183f33e6-1876-40d9-9ccd-96c4404c6387","x-minio-origin-endpoint":"http://10.87.11.203:9000"},"s3":{"s3SchemaVersion":"1.0","configurationId":"Config","bucket":{"name":"images","ownerIdentity":{"principalId":"root"},"arn":"arn:aws:s3:::images"},"object":{"key":"309667.jpg","sequencer":"1695DBEC3E78B5D8"}},"source":{"host":"::1","port":"","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36"}}]}
routingKey :: bucketlogs
body :: {"EventName":"s3:ObjectRemoved:Delete","Key":"images/221406.jpg","Records":[{"eventVersion":"2.0","eventSource":"minio:s3","awsRegion":"","eventTime":"2021-07-28T05:04:12.681Z","eventName":"s3:ObjectRemoved:Delete","userIdentity":{"principalId":"root"},"requestParameters":{"accessKey":"root","principalId":"root","region":"","sourceIPAddress":"::1"},"responseElements":{"x-amz-request-id":"","x-minio-deployment-id":"183f33e6-1876-40d9-9ccd-96c4404c6387","x-minio-origin-endpoint":"http://10.87.11.203:9000"},"s3":{"s3SchemaVersion":"1.0","configurationId":"Config","bucket":{"name":"images","ownerIdentity":{"principalId":"root"},"arn":"arn:aws:s3:::images"},"object":{"key":"221406.jpg","sequencer":"1695DBED51492E44"}},"source":{"host":"::1","port":"","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36"}}]}
