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 ~]#
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 ~]#