RabbitMQ安裝與簡單使用（centOS 7）

RabbitMQ是採用了Erlang語言實現AMQP（高級消息隊列協議）的消息中間件，在安裝MQ之前需要先安裝Erlang
Erlang官網下載地址：https://www.erlang.org/downloads
RabbitMQ官網下載地址：https://www.rabbitmq.com/releases/rabbitmq-server/

安裝Erlang

第一步，解壓安裝包，並配置安裝目錄，這裏我們安裝到/opt/erlang目錄

[root@192 /]# tar -xvf otp_src_20.3.tar.gz
[root@192 /]# cd otp_src_20.3
[root@192 otp_src_21.0]# ./configure --prefix=/opt/erlang

此時，如果出現“onfigure: error: No curses library functions found”異常信息，則需要安裝ncurses,如下：

[root@192 otp_src_20.3]# yum install ncurses-devel

安裝ncurses完成後需要繼續執行：

[root@192 otp_src_20.3]# ./configure --prefix=/opt/erlang

第二步：安裝Erlang

[root@192 otp_src_20.3]# make
[root@192 otp_src_20.3]# make install

第三步：修改/etc/profile配置文件

[root@192 /]# vim /etc/profile

添加以下配置文件

ERLANG_HOME=/opt/erlang
export PATH=$PATH:$ERLANG_HOME/bin
export ERLANG_HOME

使配置文件生效

[root@192 /]# source /etc/profile

輸入erl命令驗證Erlang是否安裝成功，出現以下提示即表示安裝成功:

[root@192 /]# erl
Erlang/OTP 21 [erts-10.0] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1]

Eshell V10.0  (abort with ^G)
1> 

安裝RabbitMQ：

第一步：選擇與Erlang安裝到同一目錄(/opt)下：
解壓至opt目錄下

[root@192 /]# tar -xvf rabbitmq-server-generic-unix-3.6.12.tar.xz -C /opt
[root@192 /]# cd opt

重命名

[root@192 opt]# mv rabbitmq_server-3.6.12 rabbitmq

第二步：修改/etc/profile配置文件

[root@192 /]# vim /etc/profile

export PATH=$PATH:/opt/rabbitmq/sbin
export RABBITMQ_HOME=/opt/rabbitmq

使配置文件生效

[root@192 /]# source /etc/profile

安裝遇到的兩個坑：

1.ERROR: epmd error for host 192: badarg (unknown POSIX error)
網上解決方法：

 vi /etc/rabbitmq/rabbitmq-env.conf

 添加此內容：NODENAME=rabbit@localhost

此文件在目錄下是沒有的，記得在/etc/下mkdir rabbitmq目錄

我這裏實際解決方法是在rabbitmq的安裝目錄下添加了上面內容：

vi /opt/rabbitmq/etc/rabbitmq/rabbitmq-env.conf

2.Error description:
{error,{missing_dependencies,[crypto,ssl]
…

解決方法：
解決方法來源於：
https://blog.csdn.net/u010739551/article/details/8084899

openSsl官網：https://www.openssl.org/source/
下載安裝openSsl：

tar -xvf openssl-1.0.2t.tar.gz
cd openssl-1.0.2t
./config --prefix=/usr/local/openssl (注意前面的“.”)

回答安裝Erlang的目錄下

[root@192 otp_src_20.3]# ./configure --prefix=/opt/erlang --with-ssl --enable-threads --enable-smp-support --enable-kernel-poll --enable-hipe --without-javac
[root@192 otp_src_20.3]# make
[root@192 otp_src_20.3]# make install

按照以上步驟執行基本沒什麼問題：
接下來啓動mq，並查看狀態：
rabbitmqctl status

[root@192 /]# rabbitmqctl status
Status of node rabbit@localhost
[{pid,109842},
 {running_applications,
     [{rabbit,"RabbitMQ","3.6.12"},
      {mnesia,"MNESIA  CXC 138 12","4.15.3"},
      {ranch,"Socket acceptor pool for TCP protocols.","1.3.0"},
      {ssl,"Erlang/OTP SSL application","8.2.4"},
      {public_key,"Public key infrastructure","1.5.2"},
      {asn1,"The Erlang ASN1 compiler version 5.0.5","5.0.5"},
      {rabbit_common,
          "Modules shared by rabbitmq-server and rabbitmq-erlang-client",
          "3.6.12"},
      {compiler,"ERTS  CXC 138 10","7.1.5"},
      {xmerl,"XML parser","1.3.16"},
      {crypto,"CRYPTO","4.2.1"},
      {os_mon,"CPO  CXC 138 46","2.4.4"},
      {syntax_tools,"Syntax tools","2.1.4"},
      {sasl,"SASL  CXC 138 11","3.1.1"},
      {stdlib,"ERTS  CXC 138 10","3.4.4"},
      {kernel,"ERTS  CXC 138 10","5.4.3"}]},
 {os,{unix,linux}},
 {erlang_version,
     "Erlang/OTP 20 [erts-9.3] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:64] [hipe] [kernel-poll:true]\n"},
 {memory,
     [{connection_readers,0},
      {connection_writers,0},
      {connection_channels,0},
      {connection_other,0},
      {queue_procs,2840},
      {queue_slave_procs,0},
      {plugins,0},
      {other_proc,22676152},
      {metrics,184544},
      {mgmt_db,0},
      {mnesia,61488},
      {other_ets,1526576},
      {binary,83944},
      {msg_index,43928},
      {code,21507227},
      {atom,900041},
      {other_system,15006220},
      {total,61992960}]},
 {alarms,[]},
 {listeners,[{clustering,25672,"::"},{amqp,5672,"::"}]},
 {vm_memory_calculation_strategy,rss},
 {vm_memory_high_watermark,0.4},
 {vm_memory_limit,407930470},
 {disk_free_limit,50000000},
 {disk_free,22450524160},
 {file_descriptors,
     [{total_limit,924},{total_used,2},{sockets_limit,829},{sockets_used,0}]},
 {processes,[{limit,1048576},{used,156}]},
 {run_queue,0},
 {uptime,72},
 {kernel,{net_ticktime,60}}]
[root@192 /]#  rabbitmqctl start_app
Starting node rabbit@localhost
[root@192 /]# rabbitmq-plugins enable rabbitmq_management
The following plugins have been enabled:
  amqp_client
  cowlib
  cowboy
  rabbitmq_web_dispatch
  rabbitmq_management_agent
  rabbitmq_management

Applying plugin configuration to rabbit@localhost... started 6 plugins.

Java代碼：

maven構建文件

<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
	<dependency>
	    <groupId>com.rabbitmq</groupId>
	    <artifactId>amqp-client</artifactId>
	    <version>5.8.0</version>
	</dependency>

Producer 生產者代碼

private static final String EXCHANGE_NAME = "exchange_demo";
	private static final String ROUTING_KEY = "routing_key";
	private static final String QUEUE_NAME = "queue_demo";
	private static final String IP_ADDRESS = "192.168.189.129";
	private static final int PORT = 5672;
	
	public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {


		ConnectionFactory factory = new ConnectionFactory();
		factory.setHost(IP_ADDRESS);
		factory.setPort(PORT);
		factory.setUsername("root");
		factory.setPassword("123456");

		Connection connection = factory.newConnection();
		Channel channel = connection.createChannel();

		channel.exchangeDeclare("exchange_demo", "direct", true, false, null);
		channel.queueDeclare(QUEUE_NAME, true, false, false, null);
		channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);

		String message = "Hello world!!!";
		channel.basicPublish(EXCHANGE_NAME, "routing_key", MessageProperties.PERSISTENT_TEXT_PLAIN, message.getBytes());
		channel.close();
		connection.close();
	}

Consumer 消費者代碼

private static final String EXCHANGE_NAME = "exchange_demo";
	private static final String ROUTING_KEY = "routing_key";
	private static final String QUEUE_NAME = "queue_demo";
	private static final String IP_ADDRESS = "192.168.189.129";
	private static final int PORT = 5672;

	public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {

		Address[] addrs = new Address[] { new Address(IP_ADDRESS, PORT) };

		ConnectionFactory factory = new ConnectionFactory();
		factory.setUsername("root");
		factory.setPassword("123456");

		Connection connection = factory.newConnection(addrs); // 創建連接
		final Channel channel = connection.createChannel(); // 創建信道
		channel.basicQos(64); // 設置客戶端最多接收未被ack的消息的個數
		Consumer consumer = new DefaultConsumer(channel) {
			@Override
			public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
					throws IOException {
				System.out.println("reecv message:" + new String(body));
				try {
					TimeUnit.SECONDS.sleep(1);
				} catch (Exception e) {
					e.printStackTrace();
				}
				channel.basicAck(envelope.getDeliveryTag(), false);
			}
		};

		channel.basicConsume(QUEUE_NAME, consumer);
		TimeUnit.SECONDS.sleep(5);
		channel.close();
		connection.close();

	}

（最近在看《RabbitMQ實戰指南》 作者：朱忠華），特此寫下此文章，記錄下學習的痕跡