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 : -p : nsqio/nsq /nsqlookupd
在105和49上启动nsqd， lookup的地址要写105
docker run --name nsqd -p : -p : nsqio/nsq /nsqd --broadcast-address=192.168.0.105 --lookupd-tcp-address=192.168.0.105:
docker run --name nsqd -p : -p : nsqio/nsq /nsqd --broadcast-address=192.168.0.49 --lookupd-tcp-address=192.168.0.105:
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 : nsqio/nsq /nsqadmin --lookupd-http-address=192.168.0.105:
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
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 :=
for i := ; i < msgCount; i++ {
err1 := w1.Publish(topicName, []byte("测试测试publis test case"))
if err1 != nil {
log.Fatal("error")
}
}
}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
package main import (
"fmt"
"github.com/nsqio/go-nsq"
"log"
"os"
"os/signal"
"strconv"
"time"
"sync"
) func main() { topicName := "publishtest"
msgCount :=
for i := ; 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 <-
ele.Stop()
}
quit <- true
}
}()
<-quit
fmt.Println("Shutdown server....")
} type ConsumerHandle struct {
q *nsq.Consumer
msgGood int
} var consumers []*nsq.Consumer = make([]*nsq.Consumer, )
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 =
config.MaxBackoffDuration = * 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....")
}
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：
class Program
{
static void Main()
{
// Create a new Consumer for each topic/channel
var consumerCount = ;
var listC = new List<Consumer>();
for (var i = ; i < consumerCount; i++)
{
var consumer = new Consumer("publishtest", $"channel{i}" );
consumer.ChangeMaxInFlight();
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
}
}