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
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") } } }
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 := 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....") }
本文转自lpxxn博客园博客，原文链接：http://www.cnblogs.com/li-peng/p/7729174.html，如需转载请自行联系原作者
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 = 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 } }
