In order to run the controller in our environment, I need to run with readOnlyRootFilesystem: true. I know that's not officially supported (#9504). I'm not asking for support for that, I'm asking for the currently-hardcoded config file paths to take an env var if present, and use the current paths as the defaults if no env var is present.

The controller currently writes to hard-coded paths in the /etc directory: /etc/nginx/nginx.conf and /etc/nginx/lua/cfg.json. Because those directories also contain other files from the container filesystem, the combination makes it impossible to place the config file on an empty dir without significant effort.

I didn't see one, aside from the issue linked above, which is different.

Not related to a particular Kubernetes version.