Nginx 核心配置-长连接配置

　　　　　　　　　　　　　　　　Nginx核心配置-长连接配置

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

版权声明：原创作品，谢绝转载！否则将追究法律责任。

一.长连接配置参数说明

keepalive_timeout number; 
　　设定保持连接超时时长，0表示禁止长连接，默认为75s，通常配置在http字段作为站点全局配置。

keepalive_requests number; 
　　在一次长连接上所允许请求的资源的最大数量，默认为100次。

二.配置长连接实战

1>.编辑主配置文件

[root@node101.yinzhengjie.org.cn ~]# cat /yinzhengjie/softwares/nginx/conf/nginx.conf
worker_processes  4;
worker_cpu_affinity 00000001 00000010 00000100 00001000; 

events {
    worker_connections  100000;
    use epoll;
    accept_mutex on;
    multi_accept on;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    gzip  on;
    charset utf-8;

    #开启长连接后，返回客户端的会话保持时间为60s，单次长连接累计请求达到指定次数请求或65秒就会被断开，后面的60为发送给客户端应答报文头部中显示的超时时间设置为60s：如不设置
客户端将不显示超时时间。    keepalive_timeout  65 60;

    #在一次长连接上所允许请求的资源的最大数量
    keepalive_requests 3;

    #导入其他路径的配置文件
    include /yinzhengjie/softwares/nginx/conf.d/*.conf;
}

[root@node101.yinzhengjie.org.cn ~]#
[root@node101.yinzhengjie.org.cn ~]# nginx -t
nginx: the configuration file /yinzhengjie/softwares/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /yinzhengjie/softwares/nginx/conf/nginx.conf test is successful
[root@node101.yinzhengjie.org.cn ~]# 

2>.重新加载配置文件内容

[root@node101.yinzhengjie.org.cn ~]# ps -ef | grep nginx | grep -v grep
root      2840     1  0 09:37 ?        00:00:00 nginx: master process nginx
nginx     4604  2840  0 13:23 ?        00:00:00 nginx: worker process
nginx     4605  2840  0 13:23 ?        00:00:00 nginx: worker process
nginx     4606  2840  0 13:23 ?        00:00:00 nginx: worker process
nginx     4607  2840  0 13:23 ?        00:00:00 nginx: worker process
[root@node101.yinzhengjie.org.cn ~]#
[root@node101.yinzhengjie.org.cn ~]# nginx -s reload
[root@node101.yinzhengjie.org.cn ~]#
[root@node101.yinzhengjie.org.cn ~]# ps -ef | grep nginx | grep -v grep
root      2840     1  0 09:37 ?        00:00:00 nginx: master process nginx
nginx     4769  2840  1 14:12 ?        00:00:00 nginx: worker process
nginx     4770  2840  1 14:12 ?        00:00:00 nginx: worker process
nginx     4771  2840  1 14:12 ?        00:00:00 nginx: worker process
nginx     4772  2840  1 14:12 ?        00:00:00 nginx: worker process
[root@node101.yinzhengjie.org.cn ~]#
[root@node101.yinzhengjie.org.cn ~]# 

三.测试长连接配置

1>.安装测试软件telnet

[root@node108.yinzhengjie.org.cn ~]# yum -y install telnet
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.tuna.tsinghua.edu.cn
 * updates: mirror.bit.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package telnet.x86_64 1:0.17-64.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

============================================================================================================================================================================
 Package                                 Arch                                    Version                                        Repository                             Size
============================================================================================================================================================================
Installing:
 telnet                                  x86_64                                  1:0.17-64.el7                                  base                                   64 k

Transaction Summary
============================================================================================================================================================================
Install  1 Package

Total download size: 64 k
Installed size: 113 k
Downloading packages:
telnet-0.17-64.el7.x86_64.rpm                                                                                                                        |  64 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 1:telnet-0.17-64.el7.x86_64                                                                                                                              1/1
  Verifying  : 1:telnet-0.17-64.el7.x86_64                                                                                                                              1/1 

Installed:
  telnet.x86_64 1:0.17-64.el7                                                                                                                                               

Complete!
[root@node108.yinzhengjie.org.cn ~]# 

[root@node108.yinzhengjie.org.cn ~]# yum -y install telnet

2>.测试连接次数

[root@node108.yinzhengjie.org.cn ~]# telnet 172.30.1.101 80
Trying 172.30.1.101...
Connected to 172.30.1.101.
Escape character is '^]'.
GET / HTTP/1.1
HOST:node101.yinzhengjie.org.cn

HTTP/1.1 200 OK
Server: nginx/1.14.2
Date: Tue, 17 Dec 2019 06:17:25 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 73
Last-Modified: Tue, 17 Dec 2019 04:54:00 GMT
Connection: keep-alive
Keep-Alive: timeout=60
ETag: "5df85f68-49"
Accept-Ranges: bytes

<h1 style='color:rgb(255,0,0)'>https://www.cnblogs.com/yinzhengjie/</h1>

GET / HTTP/1.1
HOST:node101.yinzhengjie.org.cn

HTTP/1.1 200 OK
Server: nginx/1.14.2
Date: Tue, 17 Dec 2019 06:17:38 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 73
Last-Modified: Tue, 17 Dec 2019 04:54:00 GMT
Connection: keep-alive
Keep-Alive: timeout=60
ETag: "5df85f68-49"
Accept-Ranges: bytes

<h1 style='color:rgb(255,0,0)'>https://www.cnblogs.com/yinzhengjie/</h1>

GET / HTTP/1.1
HOST:node101.yinzhengjie.org.cn

HTTP/1.1 200 OK
Server: nginx/1.14.2
Date: Tue, 17 Dec 2019 06:18:00 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 73
Last-Modified: Tue, 17 Dec 2019 04:54:00 GMT
Connection: close
ETag: "5df85f68-49"
Accept-Ranges: bytes

<h1 style='color:rgb(255,0,0)'>https://www.cnblogs.com/yinzhengjie/</h1>
Connection closed by foreign host.
[root@node108.yinzhengjie.org.cn ~]# 

3>.测试连接超时时间

[root@node108.yinzhengjie.org.cn ~]# telnet 172.30.1.101 80　　　　　　　　　　#连接成功后啥也不要操作，等65秒过后会自动断开。
Trying 172.30.1.101...
Connected to 172.30.1.101.
Escape character is '^]'.
Connection closed by foreign host.
[root@node108.yinzhengjie.org.cn ~]# 

4>.使用curl命令查看nginx的响应头部信息

[root@node108.yinzhengjie.org.cn ~]# curl -I  http://node101.yinzhengjie.org.cn/
HTTP/1.1 200 OK
Server: nginx/1.14.2
Date: Tue, 17 Dec 2019 06:19:24 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 73
Last-Modified: Tue, 17 Dec 2019 04:54:00 GMT
Connection: keep-alive
Keep-Alive: timeout=60　　　　　　　　　　#这个时间告诉客户端是60，而咱们上面配置的是告诉客户端是60秒断开，其实是65秒才会真正的断开哟~
ETag: "5df85f68-49"
Accept-Ranges: bytes

[root@node108.yinzhengjie.org.cn ~]#