How do I configure environment variables?

[kuannie1]

I keep struggling with environment variable configuration. I have this security section defined:

security:
  oidc:
    issuer-url: "https://$ISSUER_URL"
    redirect-url: "http://localhost:8080/authorization-code/callback"
    client-id: "$CLIENT_ID"
    client-secret: "$CLIENT_SECRET"
    scopes: ["openid"]

I've tried setting these environment variables explicitly, but I consistently get this error:

panic: invalid security configuration

goroutine 1 [running]:
main.main()
        /app/main.go:19 +0x1b1

When I copy paste these values in the config.yaml file, it works. Do Environment variables only work for PORT and DOMAIN? Or is this a feature that needs to get implemented? All of the other issues & PRs assume that Environment Variables were set already.

I've tried ${ENV} and $ENV, but that doesn't help.

I run gatus with this command:

$ <load env vars> docker run -p 8080:8080 --mount type=bind,source="$(pwd)"/config.yaml,target=/config/config.yaml --name gatus twinproduction/gatus

[TwiN]

All environment variables work in the configuration file.

I think your problem is that you're not passing the environment variables properly.
You specifically mentioned:

$ <load env vars> docker run -p 8080:8080 --mount type=bind,source="$(pwd)"/config.yaml,target=/config/config.yaml --name gatus twinproduction/gatus

which I assume you meant you did something like

$ CLIENT_ID=... docker run -p 8080:8080 --mount type=bind,source="$(pwd)"/config.yaml,target=/config/config.yaml --name gatus twinproduction/gatus

but that's not how you should pass environment variables using the Docker command line.
Instead, it should be:

$ docker run -e CLIENT_ID=value1 -e CLIENT_SECRET=value2 -p 8080:8080 --mount type=bind,source="$(pwd)"/config.yaml,target=/config/config.yaml --name gatus twinproduction/gatus

[kuannie1]

Thanks so much! That was it. If I have a chance, I might propose a sentence or two about this in the documentation (via PR).