Use Docker Secrets for Configuration Values

[JaronrH]

I currently use Docker Swarm with Docker Secrets to store configuration information. I would like to load information from Secrets into my configuration. For example:

receivers:
  rabbitmq:
    endpoint: http://rabbitmq_rabbitmq:15672
    username: ${file:/run/secrets/RABBITMQ_USER}
    password: ${file:/run/secrets/RABBITMQ_PASSWORD}
    collection_interval: 10s

Docker Secrets are exposed as files in /run/secrets. The problem (as far as I can tell - I'm not a Go dev) is that the ${file:} processor is trying to load those secrets as yaml files instead of values! So, I'm getting errors like this as a result:

Error: failed to get config: cannot resolve the configuration: yaml: did not find expected node content
2024/07/23 16:08:53 collector server run finished with error: failed to get config: cannot resolve the configuration: yaml: did not find expected node content

Is there a better way to do this? Maybe some way to tell opentelemetry-collector-contrib to load everything in /run/secrets into env variables so I can use ${env:*}?

Thanks!