feat(proxy): use lua http module

compose.yml

@@ -8,11 +8,11 @@ services:
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
   proxy:
-    image: openresty/openresty:alpine-fat
+    build: proxy
     env_file: .env
     ports:
       - 80:80
     volumes:
-      - ./proxy.conf:/etc/nginx/conf.d/proxy.conf.template
+      - ./proxy/proxy.conf.template:/etc/nginx/conf.d/proxy.conf.template
     network_mode: host
     command: /bin/sh -c "sed 's/{PROXY_DOMAIN}/$PROXY_DOMAIN/' /etc/nginx/conf.d/proxy.conf.template > /etc/nginx/conf.d/proxy.conf && nginx -g 'daemon off;'"

proxy/Dockerfile

@@ -0,0 +1,5 @@
+FROM openresty/openresty:alpine
+
+RUN wget -O /usr/local/openresty/lualib/resty/http.lua https://github.com/ledgetech/lua-resty-http/raw/refs/heads/master/lib/resty/http.lua
+RUN wget -O /usr/local/openresty/lualib/resty/http_connect.lua https://github.com/ledgetech/lua-resty-http/raw/refs/heads/master/lib/resty/http_connect.lua
+RUN wget -O /usr/local/openresty/lualib/resty/http_headers.lua https://github.com/ledgetech/lua-resty-http/raw/refs/heads/master/lib/resty/http_headers.lua

proxy/proxy.conf.template

@@ -22,10 +22,10 @@ server {
 
             set $ip '';
             rewrite_by_lua_block {
-                  local shell = require("resty.shell")
+                  local http = require("resty.http").new()
 
-                  local ok, stdout, strerr, reason, status = shell.run("curl http://127.0.0.1:3000/containers/" .. ngx.var.container .. "/ip")
-                  ngx.var.ip = stdout
+                  local res, err = http:request_uri("http://127.0.0.1:3000/containers/" .. ngx.var.container .. "/ip")
+                  ngx.var.ip = res.body
             }
 
             proxy_pass http://$ip:$port;