openresty安装：

1.下载openresty
    wget https://openresty.org/download/openresty-1.15.8.3.tar.gz
2.安装依赖包
    yum -y install gcc gcc-c++  pcre pcre-devel  zlib zlib-devel openssl openssl-devel
3.编译openresty
    ./configure  --with-http_ssl_module  --with-http_iconv_module  --prefix=/home/app/openresty
    make  && make install
4.配置conf
    cd /home/app/openresty/nginx/conf
    vi nginx.conf

#user  nobody;
worker_processes  1;
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#pid        logs/nginx.pid;
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;
    types_hash_max_size 2048;

    include   /home/app/openresty/nginx/conf/vhosts/*.conf;
    #gzip  on;
}

    mkdir  vhosts
    cd vhosts
    vi xxx_admin.conf

upstream gateway {
    server xx.xx.xx.xxx:80xx;
}
server {
    listen       8088;
    server_name client.bbbbbb.com;
    access_log logs/client.access.log main;
    error_log  logs/client.error.log crit;
    location / {
        root   html;
       # index  index.html index.htm;
    }
    location ^~/api {
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_buffering off;
        rewrite ^/api/(.*)$ /$1 break;
        proxy_pass http://gateway;
    }
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
}

5.启动nginx
    cd /home/app/openresty/nginx/sbin
    ./nginx