libresty_ffi.so: cannot open shared object file

[Bkndf]

My Dockerfile (I based it on the official image):

ARG RESTY_VERSION="1.27.1.1"
...
    && cd /tmp \
    && curl -fSL https://openresty.org/download/openresty-${RESTY_VERSION}.tar.gz -o openresty-${RESTY_VERSION}.tar.gz \
    && tar xzf openresty-${RESTY_VERSION}.tar.gz \
    && cd /tmp/openresty-${RESTY_VERSION} \
    && if [ -n "${RESTY_EVAL_POST_DOWNLOAD_PRE_CONFIGURE}" ]; then eval $(echo ${RESTY_EVAL_POST_DOWNLOAD_PRE_CONFIGURE}); fi \
    && eval ./configure -j${RESTY_J} ${_RESTY_CONFIG_DEPS} ${RESTY_CONFIG_OPTIONS} ${RESTY_CONFIG_OPTIONS_MORE} ${RESTY_LUAJIT_OPTIONS} ${RESTY_PCRE_OPTIONS} \
    && make -j${RESTY_J} \
    && make -j${RESTY_J} install \
    && cd /tmp \
    && curl -fSL https://luarocks.github.io/luarocks/releases/luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz -o luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz \
    && tar xzf luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz \
    && cd luarocks-${RESTY_LUAROCKS_VERSION} \
    && ./configure \
        --prefix=/usr/local/openresty/luajit \
        --with-lua=/usr/local/openresty/luajit \
        --with-lua-include=/usr/local/openresty/luajit/include/luajit-2.1 \
    && make build \
    && make install

And I put the lua-resty-ffi installation into the build:

RUN apt-get update && apt-get install -y file build-essential libpcre2-dev libssl-dev
RUN export OR_SRC=/tmp/openresty-${RESTY_VERSION} \
    && /usr/local/openresty/luajit/bin/luarocks config variables.OR_SRC /tmp/openresty-${RESTY_VERSION} \
    && /usr/local/openresty/luajit/bin/luarocks install lua-resty-ffi

This successfully compiled, openresty started up.

But when I try to test it, I get an error:

2024/11/21 00:36:49 [error] 1324#1324: *3 lua entry thread aborted: runtime error: /usr/local/openresty/luajit/share/lua/5.1/resty_ffi.lua:101: libresty_ffi.so: cannot open shared object file: No such file or directory
stack traceback:
coroutine 0:
[C]: in function 'load'
/usr/local/openresty/luajit/share/lua/5.1/resty_ffi.lua:101: in function 'load_ffi'
/hello.lua:3: in main chunk, server: localhost, request: "GET /hello HTTP/1.1", host: "127.0.0.1:8080"

---

My lua code:

require("resty_ffi")

local demo = ngx.load_ffi("test.so")

location /hello {
            content_by_lua_file /hello.lua;
}

---

All the files are in place, I checked it that way:

luarocks show lua-resty-ffi

License:         BSD-3-Clause
Homepage:       https://github.com/kingluo/lua-resty-ffi
Installed in:   /usr/local/openresty/luajit

Modules:
        libresty_ffi (/usr/local/openresty/luajit/lib/lua/5.1/libresty_ffi.so)
        resty_ffi (/usr/local/openresty/luajit/share/lua/5.1/resty_ffi.lua)

---

I even tried just writing the path to libresty_ffi.so in resty_ffi.lua, but I got a crash error:

[alert] 1#1: worker process 1324394 exited on signal 6
 buffer overflow detected : terminated
 buffer overflow detected : terminated

local handle = ffi.load("/usr/local/openresty/luajit/lib/lua/5.1/libresty_ffi.so", true)

[kingluo]

It requires thread pool support from Nginx. Can you add "--with-threads" and retry?
Also, it is recommended to test it on a plain Ubuntu system before integrating it into the Dockerfile.

I haven't tried 1.27 yet, will try it later, please stay tuned.

[Bkndf]

Thanks for the reply!

Yes, I build initially with --with-threads flag https://github.com/openresty/docker-openresty/blob/78d64677f91e01912fe13e62473d1322844ac704/noble/Dockerfile#L73, similar functionality with ngx.run_worker_thread works.

---

I tried via build on Ubuntu 20.04.6 LTS, but it didn't work at the require(“resty_ffi”) point:

[error] 3689544#3689544: *1 lua entry thread aborted: runtime error: content_by_lua(nginx.conf:49):2: module 'resty_ffi' not found:
        no field package.preload['resty_ffi']

As tested:

1. cd /opt
2. git clone https://github.com/kingluo/lua-resty-ffi
3. cd lua-resty-ffi
4. ./build.sh
5. cd lua-resty-ffi/examples/go/
6. added it to nginx.conf:

location /hello {
    content_by_lua_block {
        require("resty_ffi")

        local demo = ngx.load_ffi("test.so")
    }
}

7. make run
8. curl http://127.0.0.1:20000/hello

[kingluo]

It should be caused by this fixed bug. I forgot to upload a new luarocks version. I will do it later.

[kingluo]

@Bkndf done, please retry the latest version on luarocks. Thanks for your bug report.

[Bkndf]

Yes, it works! Thank you very much!
I'll keep implementing and figuring it out. :)

[Bkndf]

Hello, I apologize for reopening the issue.
It's just the same problem, but with the resty_ffi_python module.

*** buffer overflow detected ***: terminated
2024/12/27 11:02:12 [alert] 1#1: worker process 13 exited on signal 6

[kingluo]

yes, I forgot to update the python rockspec. I'll do it later.

[kingluo]

@Bkndf done. Please check the main-2 version.