目录

OpenResty 是一款基于 NGINX 和 LuaJIT 的 Web 平台。

拉取 OpenResty 镜像

  • Ubuntu 
    sudo docker pull openresty/openresty:xenial
  • CentOS 
    sudo docker pull openresty/openresty:centos

查看镜像的标签

$ sudo docker inspect openresty/openresty:centos | jq '.[].Config.Labels'

{
  "maintainer": "Evan Wies <evan@neomantra.net>",
  "org.label-schema.build-date": "20210915",
  "org.label-schema.license": "GPLv2",
  "org.label-schema.name": "CentOS Base Image",
  "org.label-schema.schema-version": "1.0",
  "org.label-schema.vendor": "CentOS",
  "resty_image_base": "centos",
  "resty_image_tag": "8",
  "resty_luarocks_version": "3.8.0",
  "resty_rpm_arch": "x86_64",
  "resty_rpm_dist": "el8",
  "resty_rpm_flavor": "",
  "resty_rpm_version": "1.19.9.1-1",
  "resty_yum_repo": "https://openresty.org/package/centos/openresty.repo"
}

编辑配置文件

$ vim nginx.conf

server {
    listen       80;
    server_name  localhost;

    location / {
        content_by_lua_block {
            ngx.say('# var host> '..ngx.var.host)
            ngx.say('# var request_uri> '..ngx.var.request_uri)
        }

        set_by_lua_block $host_str {
            local host = ngx.var.host

            local uuid = string.match(ngx.var.request_uri, '^/(%w+)/inference')
            if uuid ~= nil then
                host = uuid..'.apitest.dubhe.ai'
            end

            return host
        }

        add_header Host $host_str;

        root   /usr/local/openresty/nginx/html;
        index  index.html index.htm;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/local/openresty/nginx/html;
    }
}
  • add_header 设置响应头
  • proxy_set_header 设置传递给代理服务器的请求头
  • 每次讲求都会执行 set_by_lua_block 和 content_by_lua_block

Lua 语法

定义变量（local）

local var

字符串连接（..）

str1..str2

不等于（~=）

uuid ~= nil

条件语句（if）

if condition then
end

正则匹配（string.match）

string.match(str, pattern)

运行 OpenResty

sudo docker run -it --rm -p 80:80 -v `pwd`/nginx.conf:/etc/nginx/conf.d/default.conf openresty/openresty:xenial

测试

$ curl localhost/0ec2bde743d547a7a7d1ea5043230c69/inference/ -v

*   Trying ::1...
* Connected to localhost (::1) port 80 (#0)
> GET /0ec2bde743d547a7a7d1ea5043230c69/inference/ HTTP/1.1
> Host: localhost
> User-Agent: curl/7.47.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: openresty/1.15.8.3
< Date: Fri, 18 Feb 2022 00:54:26 GMT
< Content-Type: application/octet-stream
< Transfer-Encoding: chunked
< Connection: keep-alive
< Host: 0ec2bde743d547a7a7d1ea5043230c69.apitest.dubhe.ai
<
# var host> localhost
# var request_uri> /0ec2bde743d547a7a7d1ea5043230c69/inference/
* Connection #0 to host localhost left intact

参考资料