CODEWITHSUNDEEP
dockernginxluadocker-composeopenresty
d.ansimov
d.ansimov

Reputation: 2171

set_by_lua & os.getenv within openresty:alpine docker container

I'm running openresty nginx within official alpine-fat docker image, and openresty process starts with nobody user.

I need to set nginx variable with the next string:

set_by_lua $var 'return os.getenv("ENV_VAR")';

docker-compose.yml contains the next block:

build:
  context: .
  dockerfile: ./Dockerfile.nginx
environment:
  - ENV_VAR=value

But, nginx worker process seems not getting its value, and $var remains empty.

I tried to add export ENV_VAR=value to /etc/profile file, but no use. I tried to run openresty with nginx user, but it also can't see the value of ENV_VAR variable.

How can I make that thing work, if I can?

Upvotes: 1

Views: 4278

Answers (1)

Tarun Lalwani
Tarun Lalwani

Reputation: 146610

Try adding env ENV_VAR; to your nginx config. By default nginx will discard all environment variables, this will allow to save it.

From https://nginx.org/en/docs/ngx_core_module.html#env

Syntax: env variable[=value];

Default:

env TZ;

Context: main

By default, nginx removes all environment variables inherited from its parent process except the TZ variable. This directive allows preserving some of the inherited variables, changing their values, or creating new environment variables.

Upvotes: 5

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