libnginx-mod-http-lua 1.30.4-1+clp-noble installs but contains no module

[roybj]

Summary

The package libnginx-mod-http-lua (version 1.30.4-1+clp-noble) published in the CloudPanel apt repository installs successfully but contains no files. It ships no .so, no modules-available configuration, and nothing is added to /etc/nginx/modules-enabled/. The Lua module is therefore unavailable even though the package reports as installed.

Its dependency libnginx-mod-http-ndk at the same version is packaged correctly, so this appears to affect only the Lua module.

Environment

• CloudPanel 2.5.4-3+clp-noble
• Ubuntu 24.04.4 LTS (noble)
• nginx 1.30.4-1+clp-noble (nginx-full)
• Repo: https://d17k9fuiwb52nc.cloudfront.net noble/nginx

Steps to reproduce

apt-get install libnginx-mod-http-lua
dpkg -L libnginx-mod-http-lua

Expected

The package installs ngx_http_lua_module.so under /usr/lib/nginx/modules/ and a
mod-http-lua.conf under /usr/share/nginx/modules-available/, symlinked into
/etc/nginx/modules-enabled/, matching the pattern used by the other module packages.

Actual

$ dpkg -L libnginx-mod-http-lua
/.
/usr
/usr/share

$ dpkg -s libnginx-mod-http-lua
Package: libnginx-mod-http-lua
Status: install ok installed
Version: 1.30.4-1+clp-noble
Installed-Size: 16
Description: Lua module for Nginx

$ find / -name "*lua*.so" -path "*nginx*"
(no results)

$ nginx -T | grep -c "load_module.*lua"
0

For comparison, the NDK dependency installs correctly:

$ dpkg -L libnginx-mod-http-ndk
/usr/lib/nginx/modules/ndk_http_module.so
/usr/share/nginx/modules-available/mod-http-ndk.conf

After installing both, /etc/nginx/modules-enabled/ gains only 10-mod-http-ndk.conf.

apt-get install -s does not reveal the problem, since dependency resolution succeeds
normally — the package only turns out to be empty after installation.

Impact

Any nginx module or tooling that depends on ngx_http_lua_module cannot be used on CloudPanel.

Neither available alternative works:

• Ubuntu noble's libnginx-mod-http-lua 1:0.10.26-2 is built against noble's nginx 1.24.0 and
  is not binary compatible with nginx 1.30.4.
• nginx-extras 1.30.4-1+clp-noble does not include the Lua module — its dependency list
  covers 14 libnginx-mod-* packages, none of which is Lua.

The CloudPanel repository does ship several lua-nginx-* and lua-resty-* libraries
(lua-resty-core, lua-resty-lrucache, lua-nginx-redis, and others). These are pure-Lua
libraries that run inside ngx_http_lua_module and cannot be used without it, which suggests
the Lua module is intended to be available.

Suggested fix

Rebuild and republish libnginx-mod-http-lua so it ships ngx_http_lua_module.so and its
modules-available configuration, as libnginx-mod-http-ndk already does.

[roybj]

Some additional information that may help narrow this down: the module itself builds fine against nginx 1.30.4, so this looks like a packaging or build-pipeline problem rather than an upstream incompatibility.

The module builds

Built in a clean ubuntu:24.04 container (amd64):

nginx 1.30.4 (nginx.org) configured with --with-compat
  + vision5/ngx_devel_kit          @ bd44d16
  + openresty/lua-nginx-module     @ 1731f35
  + openresty/luajit2              2.1.1785460716

./configure --with-compat \
  --add-dynamic-module=../ngx_devel_kit \
  --add-dynamic-module=../lua-nginx-module
make modules

Result:

objs/ndk_http_module.so         81176 bytes
objs/ngx_http_lua_module.so   2434232 bytes

No patches were needed.

And it loads into the CloudPanel nginx build

Copied the resulting .so files to a host running nginx 1.30.4-1+clp-noble on Ubuntu 24.04.4 and tested with a throwaway config (load_module plus empty events{} / http{}), leaving the live configuration untouched:

$ sudo env LD_LIBRARY_PATH=/tmp/luatest nginx -t -c /tmp/luatest/luatest.conf
nginx: the configuration file /tmp/luatest/luatest.conf syntax is ok
nginx: configuration file /tmp/luatest/luatest.conf test is successful

No module ... is not binary compatible error, which is expected since the CloudPanel build already includes --with-compat.

One thing worth noting for the rebuild

ngx_http_lua_module links against OpenResty's LuaJIT fork at runtime:

$ ldd ngx_http_lua_module.so
    libluajit-5.1.so.2 => not found

So the package needs to ship or depend on that library as well — Ubuntu's libluajit-5.1-2 is stock LuaJIT rather than the openresty/luajit2 fork that lua-nginx-module expects. Without it the module is present but nginx cannot load it.

For reference, libnginx-mod-http-ndk at the same version already installs correctly and needs no changes:

$ dpkg -L libnginx-mod-http-ndk
/usr/lib/nginx/modules/ndk_http_module.so
/usr/share/nginx/modules-available/mod-http-ndk.conf

Happy to provide any further detail from the build if it would be useful.