Can environment variables be used to configure the server?

[glen-84]

I only see CERBOS_NO_TELEMETRY. Is it possible to configure the storage and other values using environment variables?

[alexolivier]

Yes you can configure configuration value as an environment variable using

Config values can reference environment variables by enclosing them between ${}, for example ${HOME}. Defaults can be set using ${VAR:default}.

https://docs.cerbos.dev/cerbos/latest/configuration/index.html

[glen-84]

Yep, I'm aware of those options, thanks.

I guess the short answer is "No". 🙂

[alexolivier]

What is your scenario that makes these options less desirable?

[glen-84]

We have a Docker Compose file in our application repository for development purposes, and the existing containers either require no configuration (Redis), or can be configured with environment variables (MySQL).

We wanted to avoid having other (infrastructure-like) files in the repository.

With that said, as there may be some shared configuration between dev and staging/production, it might be best for us to create a custom image with built-in configuration, and instead reference that from the Docker Compose file.

Thanks for your help.

[charithe]

Newer versions of Cerbos don't require a config file. So, you can still have a "no-config-file" setup in Docker Compose like this:

services:
  cerbos:
    image: ghcr.io/cerbos/cerbos:latest
    command: 
      - "server"
      - "--set=storage.driver=disk"
      - "--set=storage.disk.directory=${XDG_DATA_DIR}/cerbos" 

[glen-84]

Ah yes, I thought about this option yesterday, and then forgot about it. 🙃

Thanks for the info.