nginx--❤️图解及代码实现正向代理、反向代理、负载均衡❤️

$ cd /usr/nginx
$ wget http://nginx.org/download/nginx-1.9.2.tar.gz
$ tar -xzvf nginx-1.9.2.tar.gz
$ cd /usr/nginx/nginx-1.9.2
$ make && make install

$ mkdir -p /usr/nginx
$ cd /usr/nginx
$ /usr/nginx
$ unzip ngx_http_proxy_connect_module-master.zip
$ mv ngx_http_proxy_connect_module-master ngx_http_proxy_connect_module

$ /usr/nginx/nginx-1.9.2
$ patch -p1 < /usr/nginx/ngx_http_proxy_connect_module/patch/proxy_connect.patch
$ ./configure --add-module=/usr/nginx/ngx_http_proxy_connect_module
$ make && make install

chown -R nginx:nginx /usr/local/nginx
chown root:root /usr/local/nginx/sbin/nginx
chmod +s /usr/local/nginx/sbin/nginx

vi /usr/local/nginx/conf/nginx.conf

#正向代理转发http请求
server {
    #指定DNS服务器IP地址 
    resolver 114.114.114.114;
    #监听80端口，http默认端口80
    listen 80;
    #服务器IP或域名
    server_name  localhost;
	
    #正向代理转发http请求
    location / {
        proxy_pass                 http://$host$request_uri;
        proxy_set_header           HOST $host;
        proxy_buffers              256 4k;
        proxy_max_temp_file_size   0k;
        proxy_connect_timeout      30;
        proxy_send_timeout         60;
        proxy_read_timeout         60;
        proxy_next_upstream error  timeout invalid_header http_502;
    }
}

#正向代理转发https请求
server {
    #指定DNS服务器IP地址 
    resolver 114.114.114.114;
    #监听443端口，https默认端口443
    listen 443;
	
    #正向代理转发https请求
    proxy_connect;
    proxy_connect_allow            443 563;
    proxy_connect_connect_timeout  10s;
    proxy_connect_read_timeout     10s;
    proxy_connect_send_timeout     10s;
    location / {
        proxy_pass http://$host;
        proxy_set_header Host $host;
    }
}

/usr/local/nginx/sbin/nginx -t
/usr/local/nginx/sbin/nginx -s reload

tail -f /usr/local/nginx/logs/access.log

curl http://www.baidu.com/ -v -x 127.0.0.1:80
curl https://www.baidu.com/ -v -x 127.0.0.1:443

#user  nobody;
worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;

    keepalive_timeout  65;

    gzip  on;
    server {
        listen       80;
        server_name  manage.leyou.com;

        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        location / {
            proxy_pass http://127.0.0.1:9001;
            proxy_connect_timeout 600;
            proxy_read_timeout 600;
        }
    }
    server {
        listen       80;
        server_name  api.leyou.com;

        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        location / {
            proxy_pass http://127.0.0.1:10010;
            proxy_connect_timeout 600;
            proxy_read_timeout 600;
        }
    }
}

#反向代理+负载均衡
upstream reverseProxyServer{
    #负载均衡应用服务器A: 权重为10,10s内连接请求失败2次,nginx在10s内认为server是不可用的，将不在发送请求给这台服务器
    server 应用服务器A的IP:8080 weight=10 max_fails=2 fail_timeout=10s; 
    #负载均衡应用服务器B: 代理服务器权重为5,10s内连接请求失败2次,nginx在10s内认为server是不可用的，将不在发送请求给这台服务器
    server 应用服务器B的IP:8080 weight=5 fail_timeout=10s max_fails=2;
    #负载均衡应用服务器C: 代理服务器权重为5,10s内连接请求失败2次,nginx在10s内认为server是不可用的，将不在发送请求给这台服务器
    server 应用服务器C的IP:8080 weight=5 fail_timeout=10s max_fails=2;
}

server {
    #监听80端口，http默认端口80
    listen 80;
    #服务器IP或域名
    server_name  localhost;
    #反向代理请求路径中含有/appname的所有请求到upstream定义的对应反向代理模块
    location /appname {
        proxy_pass http://reverseProxyServer;
    }
}

/usr/local/nginx/sbin/nginx -t
/usr/local/nginx/sbin/nginx -s reload

upstream defaultReverseProxyServer{
    server 192.168.0.1:8080; 
    server 192.168.0.2:8080; 
}

upstream weightReverseProxyServer{
    server 192.168.0.1:8080 weight=10 max_fails=2 fail_timeout=5s;
    server 192.168.0.2:8080 weight=5 max_fails=2 fail_timeout=5s;
}

upstream ipHashReverseProxyServer{
    ip_hash;
    server 192.168.0.1:8080;
    server 192.168.0.2:8080;
}