• Docker部属Nsq集群


    用一了段时间NSQ还是很稳定的。除了稳定,还有一个特别值的说的就是部署非常简单。总想写点什么推荐给大家使用nsq来做一些东西。但是就是因为他太简单易用,文档也比较简单易懂。一直不知道要写啥!!!!!

      nsq官网: http://nsq.io/

      

      为了容灾需要对nsqd多机器部属,有了Docker后,快速扩还是很方便的。

      部署完后我会用go和c#写一些代码方便大家学习。

      准备工作:

      》两台服务器:192.168.0.49; 192.168.0.105.

      》需要在两台机器上安装好Docker

      》两台机器上镜像的拉取 

    docker pull nsqio/nsq

      我们在105上启动lookup, nsqd和客户端都需要连接这个lookup。  

    docker run --name lookupd -p 4160:4160 -p 4161:4161 nsqio/nsq /nsqlookupd

      

      在105和49上启动nsqd, lookup的地址要写105

    docker run --name nsqd -p 4150:4150 -p 4151:4151     nsqio/nsq /nsqd     --broadcast-address=192.168.0.105     --lookupd-tcp-address=192.168.0.105:4160
    docker run --name nsqd -p 4150:4150 -p 4151:4151     nsqio/nsq /nsqd     --broadcast-address=192.168.0.49     --lookupd-tcp-address=192.168.0.105:4160

     

      到了这一步就可以写代码发送和接收信息了。但是还有一个管理系统需要启动一下。nsqadmin 

    docker run --name nsqadmin -p 4171:4171 nsqio/nsq /nsqadmin --lookupd-http-address=192.168.0.105:4161

       用浏览器看一下管理端:http://192.168.0.105:4171/nodes。找开Nodes标签里面有两个节点。192.168.0.105  和 192.168.0.49。其他的你可以点开看看。

      我用go语言 简单写一个发送信息的例子:

      go使用的库是 go-nsq 地址  : github.com/nsqio/go-nsq

      

    复制代码
    func main() {
        config := nsq.NewConfig()
        // 随便给哪个ip发都可以
        //w1, _ := nsq.NewProducer("192.168.0.105:4150", config)
        w1, _ := nsq.NewProducer("192.168.0.49:4150", config)
    
        err1 := w1.Ping()
        if err1 != nil {
            log.Fatal("should not be able to ping after Stop()")
            return
        }
        defer w1.Stop()
        topicName := "publishtest"
        msgCount := 2
        for i := 1; i < msgCount; i++ {
            err1 := w1.Publish(topicName, []byte("测试测试publis test case"))
            if err1 != nil {
                log.Fatal("error")
            }
        }
    }
    复制代码

      可以尝试给49和105都发送一次试试。再看一下我们的管理页面:

      publishtest被ip105和49都发送过。但是还没有channel:

     客户端golang代码

    复制代码
    package main
    
    import (
        "fmt"
        "github.com/nsqio/go-nsq"
        "log"
        "os"
        "os/signal"
        "strconv"
        "time"
        "sync"
    )
    
    func main() {
    
        topicName := "publishtest"
        msgCount := 2
        for i := 0; i < msgCount; i++ {
            //time.Sleep(time.Millisecond * 20)
            go readMessage(topicName, i)
        }
    
        //cleanup := make(chan os.Signal, 1)
        cleanup := make(chan os.Signal)
        signal.Notify(cleanup, os.Interrupt)
        fmt.Println("server is running....")
    
        quit := make(chan bool)
        go func() {
            
            select {
                case <- cleanup:
                    fmt.Println("Received an interrupt , stoping service ...")
                    for _, ele := range consumers {
                        ele.StopChan <- 1
                        ele.Stop()
                    }
                    quit <- true
            }
        }()
        <-quit
        fmt.Println("Shutdown server....")
    }
    
    type ConsumerHandle struct {
        q       *nsq.Consumer
        msgGood int
    }
    
    var consumers []*nsq.Consumer = make([]*nsq.Consumer, 0)
    var mux *sync.Mutex = &sync.Mutex{}
    
    func (h *ConsumerHandle) HandleMessage(message *nsq.Message) error {
        msg := string(message.Body) + "  " + strconv.Itoa(h.msgGood)
        fmt.Println(msg)
    
        return nil
    }
    
    func readMessage(topicName string, msgCount int) {
    
        defer func() {
            if err := recover(); err != nil {
                fmt.Println("error: ", err)
            }
        }()
    
        config := nsq.NewConfig()
        config.MaxInFlight = 1000
        config.MaxBackoffDuration = 500 * time.Second
    
        //q, _ := nsq.NewConsumer(topicName, "ch" + strconv.Itoa(msgCount), config)
        //q, _ := nsq.NewConsumer(topicName, "ch" + strconv.Itoa(msgCount) + "#ephemeral", config)
        q, _ := nsq.NewConsumer(topicName, "ch"+strconv.Itoa(msgCount), config)
    
        h := &ConsumerHandle{q: q, msgGood: msgCount}
        q.AddHandler(h)
    
        err := q.ConnectToNSQLookupd("192.168.0.105:4161")
        //err := q.ConnectToNSQDs([]string{"192.168.0.105:4161"})
        //err := q.ConnectToNSQD("192.168.0.49:4150")
        //err := q.ConnectToNSQD("192.168.0.105:4415")
        if err != nil {
            fmt.Println("conect nsqd error")
            log.Println(err)
        }
        mux.Lock()
        consumers = append(consumers, q)
        mux.Unlock()
        <-q.StopChan
        fmt.Println("end....")
    }
    复制代码

      运行一下,会启动两个终端:

      用我们的发送代码发送信息,再看我们的客户端

      

      c# 使用的库为NsqSharp.Core 地址为:

      https://github.com/tonyredondo/NsqSharp

      简单客户端代码为:

    复制代码
    class Program
        {
            static void Main()
            {
                // Create a new Consumer for each topic/channel
                var consumerCount = 2;
                var listC = new  List<Consumer>();
                for (var i = 0; i < consumerCount; i++)
                {
                    var consumer = new Consumer("publishtest", $"channel{i}" );
                    consumer.ChangeMaxInFlight(2500);
                    consumer.AddHandler(new MessageHandler());
                    consumer.ConnectToNsqLookupd("192.168.0.105:4161");
                    listC.Add(consumer);
                }
    
    
                var exitEvent = new ManualResetEvent(false);
    
                Console.CancelKeyPress += (sender, eventArgs) => {
                    eventArgs.Cancel = true;
                    listC.ForEach(x => x.Stop());
                    exitEvent.Set();
                };
    
                exitEvent.WaitOne();
               
                
            }
        }
    
        public class MessageHandler : IHandler
        {
            /// <summary>Handles a message.</summary>
            public void HandleMessage(IMessage message)
            {
                string msg = Encoding.UTF8.GetString(message.Body);
                Console.WriteLine(msg);
            }
    
            /// <summary>
            /// Called when a message has exceeded the specified <see cref="Config.MaxAttempts"/>.
            /// </summary>
            /// <param name="message">The failed message.</param>
            public void LogFailedMessage(IMessage message)
            {
                // Log failed messages
            }
        }
    复制代码
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  • 原文地址:https://www.cnblogs.com/mafeng/p/9598245.html
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