help request: How to Add New Luarocks Dependencies in APISIX Docker Environment?

[amyrprv]

Description

I want to use additional dependencies from Luarocks while running APISIX in a Docker environment using the official images. What is the best way to install and include these dependencies?

Environment

• APISIX version (run apisix version): 3.9.1 debian docker
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[mikyll]

One way to do so is by writing a custom Docker image which inherits from an official image, and then run luarocks install <rock_name>.

Example (based on apache/apisix:3.11.0-debian):

FROM apache/apisix:3.11.0-debian

USER root

# Install luarocks (and/or whatever additional tool you need)
RUN apt-get update && apt-get install -y luarocks

RUN luarocks install <rock_name>

EXPOSE 9080 9443

ENTRYPOINT ["/docker-entrypoint.sh"]

CMD ["docker-start"]

STOPSIGNAL SIGQUIT

[amyrprv]

I am trying to install LuaSOAP I get the below error, It seems the library is dependent on luaexpat, and installing luaexpat will fail.

root@98955587e0ca:/usr/local/apisix# luarocks install luasoap
Installing https://luarocks.org/luasoap-4.0.2-1.rockspec
Missing dependencies for luasoap 4.0.2-1:
   luaexpat >= 1.1.0-3 (not installed)
   luasocket >= 2.0.2-1 (not installed)
   http-digest >= 1.2.2-1 (not installed)

luasoap 4.0.2-1 depends on luaexpat >= 1.1.0-3 (not installed)
Installing https://luarocks.org/luaexpat-1.5.2-1.src.rock

Error: Failed installing dependency: https://luarocks.org/luaexpat-1.5.2-1.src.rock - Could not find header file for EXPAT
  No file expat.h in /usr/local/include
  No file expat.h in /usr/include
You may have to install EXPAT in your system and/or pass EXPAT_DIR or EXPAT_INCDIR to the luarocks command.
Example: luarocks install luaexpat EXPAT_DIR=/usr/local

[Revolyssup]

@amyrprv Try installing libexpat1-dev or expat with the package manager. The C library is missing. Btw what is your exact use case? Why do you want to install this library ?

[amyrprv]

@Revolyssup I'm creating a custom plugin to transform SOAP upstream into JSON. I'm currently using the body-transformer plugin, but I've encountered issues in production: the upstream response isn't converted to JSON in hight load with the rate of 1.5 percent of the total tps, and the template-based approach isn't very convenient. I’m looking for a more reliable solution to handle the SOAP-to-JSON transformation.

also after installing libexpat1-dev from apt I get error: error Expat 2.4 or newer is required