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 ~]#

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