实践NGINX Load Balancing – HTTP Load Balancer
nginx是一款由俄罗斯人开发的web服务器/反向代理服务器/email服务器/负载均衡器软件,并在一个BSD-like 协议下发行,目前比较流行,最初近适用于Linux平台,目前已有Windows平台版本,优点是资源消耗少、并发处理能力强。
具体的使用的场景参考:Nginx官方参考文档。
具体平台版本见:http://nginx.org/packages/
实验环境:
1,Win7(192.168.84.1)加虚拟机CentOS7(192.168.84.128)
2,Win7下tomcat:apache-tomcat-7.0.68,CentOS7下tomcat:apache-tomcat-7.0.70
3,CentOS7中安装Nginx版本:nginx-1.10.1
CentOS7中安装nginx-1.10.1:
我下载的是源码编译版:nginx-1.10.1.tar.gz,编译安装稳定版需要安装好gcc、gcc-c++、openssl-devel、pcre-devel、zlib-devel,并下载pcre-devel、zlib-devel的源码。
1,解压nginx源码后的目录下,执行:
./configure \ --conf-path=/etc/nginx/nginx.conf \ --error-log-path=/var/log/nginx/error.log \ --http-log-path=/var/log/nginx/access.log \ --pid-path=/var/run/nginx/nginx.pid \ --lock-path=/var/lock/nginx.lock \ --with-zlib=/home/merrick/zlib-1.2.8 \ --with-pcre=/home/merrick/pcre-8.38 \ --user=nginx \ --group=nginx \ --with-http_ssl_module \ --with-http_flv_module \ --with-http_stub_status_module \ --with-http_gzip_static_module \ --http-client-body-temp-path=/var/tmp/nginx/client/ \ --http-proxy-temp-path=/var/tmp/nginx/proxy/ \ --http-fastcgi-temp-path=/var/tmp/nginx/fcgi/
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2,编译,安装:
[root@localhost nginx-1.10.1]# make & make install
3,启动,停止:
启动:/usr/local/nginx/sbin/nginx
停止:查到nginx主进程号后(master进程),执行kill -QUIT 主进程号
配置负载均衡:
1,配置/etc/nginx/nginx.conf(参考https://www.nginx.com/resources/admin-guide/load-balancer/):
worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' # '$status $body_bytes_sent "$http_referer" ' # '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; upstream backend{ server 192.168.84.128:8080 weight=5 max_fails=2 fail_timeout=600s; server 192.168.84.1:8080 weight=4 max_fails=2 fail_timeout=600s; } server { listen 192.168.84.128:80; server_name localhost; #charset koi8-r; access_log logs/host.access.log main; location / { proxy_pass http://backend; # root html; # index index.html index.htm; } location /NginxStatus { stub_status on; access_log off; } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; }}
2,启动win7下和centos7下的tomcat
3,在win7下访问centos7的80主页测试几次:
可以看到访问nginx这个代理服务器时会随机转到两个web主页: