Nginx phase of passenger_env_var?

[Boris Kheyfets]

Hi all,

I'm trying to pass secrets with set_by_lua in nginx.conf with the help of passenger_env_var. However it doesn't work:

set_by_lua $PG_USER 'return os.getenv("PG_USER")';
passenger_env_var PG_USER $PG_USER;

neither this works:

set_by_lua $PG_USER 'return "boris"';
passenger_env_var PG_USER $PG_USER;

Using the string directly works:

passenger_env_var PG_USER boris;

All of these happen in the server context. Docs say set_by_lua happens at rewrite phase, and I guess they refer to NGX_HTTP_REWRITE_PHASE. I suspect the behavior above is related to the nginx phase of the passenger_env_var. However, it phase is not mentioned in the docs. So my question is what is: what phase does passenger_env_var occurs at?

[Boris Kheyfets]

Using set instead of set_by_lua also doesn't work:

set $PG_USER boris;
passenger_env_var PG_USER $PG_USER;

[Daniel Knoppel]

This is a known request for enhancement:

https://github.com/phusion/passenger/issues/1779

- Daniel