Nginx实现udp负载均衡(部署+测试)

亦凉 2023-06-19 09:52 6阅读 0赞

1.  下载:wget http://nginx.org/download/nginx-1.16.1.tar.gz  
    本地下载(内含部署文档): [点击下载 nginx-1.16.1][nginx-1.16.1]
2.  安装依赖
    
        apt-get install gcc gcc-c++ autoconf automake
        apt-get install zlib1g-dev openssl libssl-dev libpcre3 libpcre3-dev
3.  安装
    
        tar xvf nginx-1.16.1.tar.gz
        cd nginx-1.16.1
        ./configure --with-stream
        make
        make install
        ldconfig
4.  nginx配置udp转发
    
        vi /usr/local/nginx/conf/nginx.conf 修改如下:
        	#user  nobody;
        	worker_processes  1;
        
        	#error_log  logs/error.log;
        	#error_log  logs/error.log  notice;
        	#error_log  logs/error.log  info;
        
        	#pid        logs/nginx.pid;
        
        	events {
        	    worker_connections  1024;
        	}
        	stream {
        		upstream dns_servers{
        			least_conn;
        			server 192.168.2.125:20001 ;
        			server 192.168.2.125:20002 ;
        		}
        		server {
        			listen 20000 udp;
        			proxy_pass dns_servers;
        			proxy_buffer_size 16k;
        			proxy_timeout 10s;
        		}
        	}
        	```
5.  启动
    
        vi /usr/lib/systemd/system/nginx.service
        	[Unit]
        	Description=nginx - high performance web server
        	After=network.target remote-fs.target nss-lookup.target
        
        	[Service]
        	Type=forking
        	ExecStart=/usr/local/nginx/sbin/nginx
        	ExecReload=/usr/local/nginx/sbin/nginx -s reload
        	ExecStop=/usr/local/nginx/sbin/nginx -s stop
        
        	[Install]
        	WantedBy=multi-user.target
        systemctl daemon-reload //重新加载服务
        
        systemctl start nginx  //启动
        systemctl stop nginx  //停止
        systemctl reload nginx  //重启 可以不用停止nginx服务,使修改的配置生效
        systemctl restart nginx  //重启
        systemctl enable nginx  //设置开机启动
        systemctl disable nginx  //禁用开机启动
        systemctl status nginx  //查看服务状态
6.  测试代码

*  server.py 启动两台服务端

# coding=utf-8
    import time, threading
    import random
    import gevent
    import signal
    from gevent import socket
    import sys, os
    
    remote = (("192.168.2.125", 20001), ("192.168.2.125", 20002))
    ncli = range(0, len(remote))
    threads = []
    def serverThread(arg, val):
        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        sock.bind(remote[arg])
        print "[%d]Thread: Bind %s" % (arg, remote[arg])
        while True:
            try:
                recv_data, addr = sock.recvfrom(1024)
                print '[%d]Thread: Recv from %s:%s' % (arg, addr, recv_data)
                send_data = '[%s]Hello, %s!' % (remote[arg], recv_data)
                sock.sendto(send_data, addr)
            except Exception as e:
                print e
        sock.close()
    
    def Process():
        try:
            for i in ncli:
                t = threading.Thread(target=serverThread, args=(i,0))
                t.setDaemon(True)
                threads.append(t)
            for i in ncli:
                threads[i].start()
        except KeyboardInterrupt:
            print 'end'
    
    def signal_handler(signum, frame):
        print 'PID:[%d] exit!' % os.getpid()
        os.kill(os.getpid(),signal.SIGKILL)	
    
    def CtrlSignalExit():
        signal.signal(signal.SIGINT, signal_handler)
    
    if __name__ == '__main__':
        CtrlSignalExit()
        Process()
        while True:
            alive = False
            for i in ncli:
                alive = alive or threads[i].isAlive()
                time.sleep(0.01)
            if not alive:
                break

*  client.py 启动多台客户端

# coding=utf-8
    
    import time, threading
    import random
    import gevent
    import signal
    from gevent import socket
    import sys, os
    
    thread_num = 5  #open thread num
    is_exit = True
    time_out_count = 0
    start_time = 0
    thread_count = range(0,thread_num)
    
    def clientThread(arg,val):
        sock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
        socket.setdefaulttimeout(3)
        remote = ("192.168.2.125", 20000)
    
        count = 0
        while is_exit:
            try:
                count += 1
                
                global thread_count
                thread_count[arg] = count
                send_data = '[%d]Client: Test:%d' % (arg, count)
                sock.sendto(send_data,remote)
                recv_data,address = sock.recvfrom(1024)
                print recv_data
            except socket.timeout as e:
                global time_out_count
                time_out_count += 1
                print 'time out'
                if is_exit == False:
                    break
            time.sleep(1)
        sock.close()
    
    ncli = range(0,thread_num)
    threads = []
    def press_test():
        try:
            for i in ncli:
                t = threading.Thread(target=clientThread, args=(i,0))
                t.setDaemon(True)
                threads.append(t)
            for i in ncli:
                threads[i].start()
        except KeyboardInterrupt:
            print 'end'
    
    def signal_handler(signum, frame):
        tatol_count = 0
        time_count = int(time.time() - start_time)
        global is_exit
        is_exit = False
        time.sleep(1)
        print '\n**********Press Result*********'
        for i,val in enumerate(thread_count):
            tatol_count += val
            print 'index:%d count:%d' % (i,val)
        print 'Press test end time out:%d' % (time_out_count)
        print 'Press test time:%ds' % (time_count)
        print 'Press test tatol count:%d' % (tatol_count)
        if time_count > 0:
            print 'Press test average second num:%d' % (tatol_count/time_count)
    
    def CtrlSignalExit():
        signal.signal(signal.SIGINT, signal_handler)
    
    if __name__ == '__main__':
        global start_time
        start_time = time.time()
        CtrlSignalExit()
        press_test()
        while True:
            alive = False
            for i in ncli:
                alive = alive or threads[i].isAlive()
                time.sleep(0.01)
            if not alive:
                break

1.  测试结果

*  服务端

[0]Thread: Bind ('192.168.2.125', 20001)
    [1]Thread: Bind ('192.168.2.125', 20002)
    
    [0]Thread: Recv from ('192.168.2.125', 38190):[0]Client: Test:1
    [1]Thread: Recv from ('192.168.2.125', 59498):[1]Client: Test:1
    [1]Thread: Recv from ('192.168.2.125', 60757):[2]Client: Test:1
    [0]Thread: Recv from ('192.168.2.125', 50820):[3]Client: Test:1
    [0]Thread: Recv from ('192.168.2.125', 56942):[4]Client: Test:1
    [1]Thread: Recv from ('192.168.2.125', 60757):[2]Client: Test:2
    [0]Thread: Recv from ('192.168.2.125', 38190):[0]Client: Test:2
    [1]Thread: Recv from ('192.168.2.125', 59498):[1]Client: Test:2
    [0]Thread: Recv from ('192.168.2.125', 56942):[4]Client: Test:2
    [0]Thread: Recv from ('192.168.2.125', 50820):[3]Client: Test:2
    [1]Thread: Recv from ('192.168.2.125', 60757):[2]Client: Test:3
    [0]Thread: Recv from ('192.168.2.125', 38190):[0]Client: Test:3
    [0]Thread: Recv from ('192.168.2.125', 50820):[3]Client: Test:3
    [1]Thread: Recv from ('192.168.2.125', 59498):[1]Client: Test:3
    [0]Thread: Recv from ('192.168.2.125', 56942):[4]Client: Test:3

*  客户端

[('192.168.2.125', 20002)]Hello, [2]Client: Test:1!
    [('192.168.2.125', 20001)]Hello, [0]Client: Test:1!
    [('192.168.2.125', 20002)]Hello, [1]Client: Test:1!
    [('192.168.2.125', 20001)]Hello, [3]Client: Test:1!
    [('192.168.2.125', 20001)]Hello, [4]Client: Test:1!
    [('192.168.2.125', 20002)]Hello, [2]Client: Test:2!
    [('192.168.2.125', 20002)]Hello, [1]Client: Test:2!
    [('192.168.2.125', 20001)]Hello, [4]Client: Test:2!
    [('192.168.2.125', 20001)]Hello, [0]Client: Test:2!
    [('192.168.2.125', 20001)]Hello, [3]Client: Test:2!
    [('192.168.2.125', 20001)]Hello, [3]Client: Test:3!
    [('192.168.2.125', 20001)]Hello, [0]Client: Test:3!
    [('192.168.2.125', 20002)]Hello, [2]Client: Test:3!
    [('192.168.2.125', 20002)]Hello, [1]Client: Test:3!
    [('192.168.2.125', 20001)]Hello, [4]Client: Test:3!

[nginx-1.16.1]: https://download.csdn.net/download/hanbo622/12015879