在CentOS7上安装RabbitMQ

转自 ：https://www.cnblogs.com/uptothesky/p/6094357.html

安装过程参考官网：

Installing on RPM-based Linux (RHEL, CentOS, Fedora, openSUSE)
首先需要安装erlang，参考：http://fedoraproject.org/wiki/EPEL/FAQ#howtouse

rpm -Uvh http://download.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-8.noarch.rpm
yum install erlang
安装过程中会有提示，一路输入“y”即可。

完成后安装RabbitMQ：

先下载rpm：

wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.6/rabbitmq-server-3.6.6-1.el7.noarch.rpm
下载完成后安装：

yum install rabbitmq-server-3.6.6-1.el7.noarch.rpm
完成后启动服务：

service rabbitmq-server start
可以查看服务状态：

service rabbitmq-server status

这里可以看到log文件的位置，转到文件位置，打开文件：

这里显示的是没有找到配置文件，我们可以自己创建这个文件

cd /etc/rabbitmq/
vi rabbitmq.config
编辑内容如下：

[{rabbit, [{loopback_users, []}]}].
这里的意思是开放使用，rabbitmq默认创建的用户guest，密码也是guest，这个用户默认只能是本机访问，localhost或者127.0.0.1，从外部访问需要添加上面的配置。

保存配置后重启服务：

service rabbitmq-server stop
service rabbitmq-server start
此时就可以从外部访问了，但此时再看log文件，发现内容还是原来的，还是显示没有找到配置文件，可以手动删除这个文件再重启服务，不过这不影响使用

rm rabbit\@mythsky.log
service rabbitmq-server stop
service rabbitmq-server start

开放5672端口：

firewall-cmd –zone=public –add-port=5672/tcp –permanent
firewall-cmd –reload
在Windows上进行测试：

新建.net core控制台项目，引用RabbitMQ.Client包：

Install-Package RabbitMQ.Client
测试代码：

复制代码
public static void Main(string[] args)
{
ConnectionFactory factory = new ConnectionFactory();
factory.UserName = “guest”;
factory.Password = “guest”;
factory.VirtualHost = “/”;
factory.HostName = “localhost”;
//factory.HostName = “10.255.19.111”;
try
{
IConnection conn = factory.CreateConnection();
IModel model = conn.CreateModel();
string exchangeName = “test”;
string queueName = “testq”;
string routingKey = “first”;

            model.ExchangeDeclare(exchangeName, ExchangeType.Direct);
            model.QueueDeclare(queueName, false, false, false, null);
            model.QueueBind(queueName, exchangeName, routingKey, null);
            byte[] messageBodyBytes = System.Text.Encoding.UTF8.GetBytes("Hello, world!");
            model.BasicPublish(exchangeName, routingKey, null, messageBodyBytes);
            Console.WriteLine("message sended.");

            bool noAck = false;
            BasicGetResult result = model.BasicGet(queueName, noAck);
            if (result == null)
            {
                Console.Write("no message.");
            }
            else
            {
                IBasicProperties props = result.BasicProperties;
                byte[] body = result.Body;
                model.BasicAck(result.DeliveryTag, false);
                string message = System.Text.Encoding.UTF8.GetString(body);
                Console.Write(message);
            }
        }
        catch (Exception ex)
        {
            Console.Write(ex.Message);
        }
    }

复制代码
也可以使用官网的例子（这里更清晰）：

http://www.rabbitmq.com/tutorials/tutorial-one-dotnet.html

发送端：

复制代码
using System;
using RabbitMQ.Client;
using System.Text;

class Send
{
public static void Main()
{
var factory = new ConnectionFactory() { HostName = “localhost” };
using(var connection = factory.CreateConnection())
using(var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: “hello”,
durable: false,
exclusive: false,
autoDelete: false,
arguments: null);

        string message = "Hello World!";
        var body = Encoding.UTF8.GetBytes(message);

        channel.BasicPublish(exchange: "",
                             routingKey: "hello",
                             basicProperties: null,
                             body: body);
        Console.WriteLine(" [x] Sent {0}", message);
    }

    Console.WriteLine(" Press [enter] to exit.");
    Console.ReadLine();
}

}
复制代码
接收端：

复制代码
using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Text;

class Receive
{
public static void Main()
{
var factory = new ConnectionFactory() { HostName = “localhost” };
using(var connection = factory.CreateConnection())
using(var channel = connection.CreateModel())
{
channel.QueueDeclare(queue: “hello”,
durable: false,
exclusive: false,
autoDelete: false,
arguments: null);

        var consumer = new EventingBasicConsumer(channel);
        consumer.Received += (model, ea) =>
        {
            var body = ea.Body;
            var message = Encoding.UTF8.GetString(body);
            Console.WriteLine(" [x] Received {0}", message);
        };
        channel.BasicConsume(queue: "hello",
                             noAck: true,
                             consumer: consumer);

        Console.WriteLine(" Press [enter] to exit.");
        Console.ReadLine();
    }
}

}
复制代码
在Windows上发送，在CentOS上接收，效果如图：

开启管理UI：

rabbitmq-plugins enable rabbitmq_management
firewall-cmd –zone=public –add-port=15672/tcp –permanent
firewall-cmd –reload
在Windows下打开地址：

http://10.255.19.111:15672

用户名和密码都是 guest

这样就可以方便管理RabbitMQ了。