参考代码
https://gitee.com/xiaoyun461/blocking-external-networks
首先 需要的依赖：
https://github.com/maxmind/libmaxminddb
https://github.com/Dreamacro/maxmind-geoip
libmaxminddb 需要gcc编译，可用 Dockerfile 里面编译生成so文件，然后复制到 openresty/openresty:centos-rpm 镜像中，然后把 Country.mmdb（Ip数据库） 也复制到镜像中
Dockerfile 如下：
############## 构建 libmaxminddb #####################
FROM gcc:9 AS libmaxminddb-build
ADD lib/libmaxminddb-1.8.0.tar.gz /
WORKDIR /libmaxminddb-1.8.0
RUN ./configure && make && make install && ldconfig -v && ls -f /usr/local/lib/libmaxminddb*
############## 构建 openresty #####################
FROM openresty/openresty:centos-rpm
ENV TZ Asia/Shanghai
COPY --from=libmaxminddb-build /usr/local/lib/libmaxminddb.so.0.0.7 /lib64
COPY geoip/20231212/Country.mmdb /etc/nginx/mmdb/Country.mmdb
RUN ln -snf /usr/share/zoneinfo/"$TZ" /etc/localtime && echo "$TZ" > /etc/timezone \
&& opm get anjia0532/lua-resty-maxminddb \
&& ln -s /lib64/libmaxminddb.so.0.0.7 /lib64/libmaxminddb.so \
&& ldconfig -v
然后配置lua脚本，OpenResty（也称为 ngx_openresty）是一个基于 Nginx 与 Lua 的高性能 Web 平台，
lua脚本如下：
local function get_client_ip()
local headers = ngx.req.get_headers()
local clientIP = headers["x-forwarded-for"]
if clientIP == nil or string.len(clientIP) == 0 or clientIP == "unknown" then
clientIP = headers["Proxy-Client-IP"]
end
if clientIP == nil or string.len(clientIP) == 0 or clientIP == "unknown" then
clientIP = headers["WL-Proxy-Client-IP"]
end
if clientIP == nil or string.len(clientIP) == 0 or clientIP == "unknown" then
clientIP = ngx.var.remote_addr
end
-- 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
if clientIP ~= nil and string.len(clientIP) > 15 then
local pos = string.find(clientIP, ",", 1)
clientIP = string.sub(clientIP, 1, pos - 1)
end
return clientIP;
end
local function check_cn(ip)
local geo = require 'resty.maxminddb'
if not geo.initted() then
geo.init("/etc/nginx/mmdb/Country.mmdb")
end
local res, err = geo.lookup(ip)
if not res then
ngx.log(ngx.ERR, ' failed to lookup by ip , reason :', err)
else
for k, v in pairs(res) do
if (k == "country") then
for key, item in pairs(v) do
if (key == "iso_code") then
if item == "CN" then
ngx.log(ngx.INFO, ' this counrty: ', item)
return 1;
else
ngx.log(ngx.ERR, ' this counrty: ', item)
return 0;
end
end
end
end
end
end
end
-- 获取nginx 本地缓存
local cache_ngx = ngx.shared.dis_cache;
-- 获取 请求IP
local clientIP = get_client_ip();
--根据IP 获取本地黑名单缓存数据
local banIpCache = cache_ngx:get('ban_ip_' .. clientIP);
if banIpCache == 1 then
ngx.log(ngx.ERR, "cache_black_ip:", clientIP)
ngx.exit(403)
else
-- 判断是否是国外IP, 直接设为黑名单,并且返回403
local flag = check_cn(clientIP);
if flag == 0 then
-- 本地缓存黑名单 时间1小时
ngx.log(ngx.ERR, "set_local_black_ip:", clientIP)
cache_ngx:set('ban_ip_' .. clientIP, 1, 60 * 60);
ngx.exit(403)
end
end
nginx.conf 配置文件 也要加入 lua脚本校验，以及 增加128M的本地缓存，方便过滤
nginx.conf如下：
pcre_jit on;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
error_log logs/error.log warn;
#pid logs/nginx.pid;
worker_processes auto;
events {
worker_connections 20480;
}
http {
include mime.types;
default_type application/octet-stream;
# Enables or disables the use of underscores in client request header fields.
# When the use of underscores is disabled, request header fields whose names contain underscores are marked as invalid and become subject to the ignore_invalid_headers directive.
# underscores_in_headers off;
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 /dev/stdout main;
# Log in JSON Format
log_format nginxlog_json escape=json '{ "timestamp": "$time_local", '
'"remote_addr": "$remote_addr", '
'"remote_user": "remote_user", '
'"body_bytes_sent": $body_bytes_sent, '
'"request_time": $request_time, '
'"response_status": $status, '
'"request": "$request", '
'"request_method": "$request_method", '
'"host": "$host",'
'"upstream_addr": "$upstream_addr",'
'"upstream_host": "$upstream_http_host",'
'"upstream_resp_time": "$upstream_response_time",'
'"http_x_forwarded_for": "$http_x_forwarded_for",'
'"http_referrer": "$http_referer", '
'"http_user_agent": "$http_user_agent", '
'"http_version": "$server_protocol" ';
map $time_iso8601 $logdate {
'~^(?<ymd>\d{4}-\d{2}-\d{2})' $ymd;
default 'date-not-found';
}
access_log logs/access_json-$logdate.log nginxlog_json;
# See Move default writable paths to a dedicated directory (#119)
# https://github.com/openresty/docker-openresty/issues/119
client_body_temp_path /var/run/openresty/nginx-client-body;
proxy_temp_path /var/run/openresty/nginx-proxy;
fastcgi_temp_path /var/run/openresty/nginx-fastcgi;
uwsgi_temp_path /var/run/openresty/nginx-uwsgi;
scgi_temp_path /var/run/openresty/nginx-scgi;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
client_max_body_size 150m;
# lua cache
lua_shared_dict dis_cache 128m;
gzip on;
gzip_static on;
gzip_min_length 1k; # 设置允许压缩的页面最小字节数
gzip_buffers 4 16k; # 用来存储 gzip 的压缩结果
gzip_http_version 1.1; # 识别 HTTP 协议版本
gzip_comp_level 2; # 设置 gzip 的压缩比 1-9。1 压缩比最小但最快，而 9 相反
gzip_types gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript; # 指定压缩类型
gzip_proxied any; # 无论后端服务器的 headers 头返回什么信息，都无条件启用压缩
# 限制国外ip
access_by_lua_file /etc/nginx/lua/access_limit_open.lua;
include /etc/nginx/conf.d/*.conf;
}
全部 样例代码 在
https://gitee.com/xiaoyun461/blocking-external-networks
可自行修改