nginx openresty example

nginx 相关备忘

安装 openresty nginx

yum install pcre-devel openssl-devel gcc curl
wget https://openresty.org/download/openresty-1.21.4.1.tar.gz
tar -xvf openresty-1.21.4.1.tar.gz
cd openresty-1.21.4.1
./configure --prefix=/data/soft/openresty --with-luajit --with-http_iconv_module -j21
gmake -j 4
gmake install

配置service

vim /usr/lib/systemd/system/openresty.service

[Unit]
Description=The OpenResty Application Platform
After=syslog.target network.target remote-fs.target nss-lookup.target

[Service]
Type=forking
PIDFile=/data/soft/openresty/nginx.pid
ExecStartPre=/data/soft/openresty/nginx/sbin/nginx -t
ExecStart=/data/soft/openresty/nginx/sbin/nginx
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target

• 之后的操作命令：

  systemctl start|stop|restart|reload openresty

• 报错
  systemd[1]: PID file /data/soft/openresty/nginx.pid not readable (yet?) after start.
  可能是 service 配置的 PIDFile 和 nginx.conf 的不一样，或者是 nginx.conf 用的用户没有示例 /data/soft/openresty 的读写权限

配置

nginx.conf

• 需要注意 user 配置，需要确认这个用户的权限
• 需要注意 pid 配置，需要和 service 配置一致

  user  root;
  worker_processes auto;
  worker_rlimit_nofile 102400;
  error_log  logs/error.log ;
  pid   /data/soft/openresty/nginx.pid;

示例：pay 路由

• pay.route.conf
  示例展示用 pay.route.lua 里的规则重置 ngx.proxy，然后代理到对应处理里面
需要用 rewrite_by_lua/rewrite_by_lua_file 重写 ngx.proxy
需要注意这里的相对路径是从 /data/soft/openresty/nginx 开始的

  server {
      listen 8080;
      location / {
          limit_except POST { deny all; }
  
          set $proxy "";
          rewrite_by_lua_file conf/vhosts/pay.route.lua;
          proxy_pass http://$proxy$uri;
      }
  }
  server {
      listen 3000;
      location = /pay {
          client_max_body_size 50k;
          client_body_buffer_size 50k;
  
          content_by_lua_block {
              ngx.say("3000....")
              ngx.exit(200)
          }
      }
  }
  server {
      listen 3001;
      location = /pay {
          client_max_body_size 50k;
          client_body_buffer_size 50k;
  
          content_by_lua_block {
              ngx.say("3001....")
              ngx.exit(200)
          }
      }
  }
  server {
      listen 3002;
      location = / {
          client_max_body_size 50k;
          client_body_buffer_size 50k;
  
          content_by_lua_block {
              ngx.say("error")
              ngx.exit(400)
          }
      }
  }

• pay.route.lua

  -- pay route
  
  local default_proxy = "127.0.0.1:3002"
  
  local route_proxy_config = {
      ["1012"] = "127.0.0.1:3000",
      ["1016"] = "127.0.0.1:3001",
      ["1018"] = "127.0.0.1:3002",
  };
  
  local area_args_key = "ext"
  local area_index = 2
  
  -- route_proxy
  local route_proxy = default_proxy
  
  ngx.req.read_body()
  
  local args, err = ngx.req.get_post_args()
  if args[area_args_key] then
      local index = 1
      for area in string.gmatch(args[area_args_key], "[^|]+") do
          if index == area_index then
              if route_proxy_config[area] ~= nil then
                  route_proxy = route_proxy_config[area]
                  break
              end
          end
          index = index + 1
      end
  end
  
  ngx.var.proxy = route_proxy