Not able to configure OIDC with lua nginx

Question

Am following below blog (https://developers.redhat.com/blog/2018/10/08/configuring-nginx-keycloak-oauth-oidc/) to setup an NGINX lua oidc. Below is my installation and setup, am unable to run below commands

Install all the Lua modules using luarocks:

# luarocks install lua-cjson
# luarocks install lua-resty-openidc

Results:

[root@samplesys nginx-lua]# yum install luarocks
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirror.netdepot.com
 * epel: mirror.lax.genesisadaptive.com
 * extras: mirror.netdepot.com
 * updates: mirror.netdepot.com
Package luarocks-2.3.0-1.el7.x86_64 already installed and latest version
Nothing to do



[root@sample nginx-lua]# luarocks install lua-cjson
Warning: falling back to curl - install luasec to get native HTTPS support
Warning: Failed searching manifest: Failed fetching manifest for https://luarocks.org - Failed downloading https://luarocks.org/manifest-5.1 - /var/cache/luarocks/https___luarocks.org/manifest-5.1
Warning: Failed searching manifest: Failed fetching manifest for https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/ - Failed downloading https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/manifest-5.1 - /var/cache/luarocks/https___raw.githubusercontent.com_rocks-moonscript-org_moonrocks-mirror_master_/manifest-5.1
Warning: Failed searching manifest: Failed extracting manifest file: failed extracting /var/cache/luarocks/http___luafr.org_moonrocks_/manifest-5.1.zip
Warning: Failed searching manifest: Failed extracting manifest file: failed extracting /var/cache/luarocks/http___luarocks.logiceditor.com_rocks/manifest-5.1.zip
lua-cjson not found for Lua 5.1.
Checking if available for other Lua versions...
Checking for Lua 5.2...
Checking for Lua 5.3...
Checking for Lua 5.4...

Error: No results matching query were found for Lua 5.1.




[root@sample nginx-lua]# luarocks install lua-resty-openidc
Warning: falling back to curl - install luasec to get native HTTPS support
Warning: Failed searching manifest: Failed fetching manifest for https://luarocks.org - Failed downloading https://luarocks.org/manifest-5.1 - /var/cache/luarocks/https___luarocks.org/manifest-5.1
Warning: Failed searching manifest: Failed fetching manifest for https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/ - Failed downloading https://raw.githubusercontent.com/rocks-moonscript-org/moonrocks-mirror/master/manifest-5.1 - /var/cache/luarocks/https___raw.githubusercontent.com_rocks-moonscript-org_moonrocks-mirror_master_/manifest-5.1
Warning: Failed searching manifest: Failed extracting manifest file: failed extracting /var/cache/luarocks/http___luafr.org_moonrocks_/manifest-5.1.zip
Warning: Failed searching manifest: Failed extracting manifest file: failed extracting /var/cache/luarocks/http___luarocks.logiceditor.com_rocks/manifest-5.1.zip
lua-resty-openidc not found for Lua 5.1.
Checking if available for other Lua versions...
Checking for Lua 5.2...
Checking for Lua 5.3...
Checking for Lua 5.4...

Error: No results matching query were found for Lua 5.1.

Answer 1

There's a few things that are wrong here:

1. Compiling nginx and manually adding lua-nginx-module is not the recommended way to install openresty. Quoting the readme:

It is highly recommended to use OpenResty releases which bundle Nginx, ngx_lua (this module), LuaJIT, as well as other powerful companion Nginx modules and Lua libraries.

2. The Lua version used in the tutorial seems to be PUC Lua 5.1, which really doesn't have anything going for it anymore; the reason people use 5.1 is that LuaJIT implements that version. I don't remember to which extent openresty even still supports that version, but later versions of it are certainly built mainly to work with LuaJIT.

3. You don't need to install lua-cjson if you're using an openresty release, as it already comes bundled (see readme)

4. Looking at the error you're getting Failed fetching manifest for https://luarocks.org - Failed downloading https://luarocks.org/manifest-5.1 it seems that luarocks can't download the manifest file, which is either a temporary problem with luarocks.org (It works for me as I am writing this answer), or a problem with your network. Try downloading the URL from the error message using a tool like wget or curl and see if that works (is curl even installed?)