Bearer extension authenticator against local endpoint

[ilaikim99]

Component(s)

No response

Is your feature request related to a problem? Please describe.

I need the collector receiver to authenticate against a local endpoint, passing it the bearer token. The extension only supports authenticating against a static token.

Describe the solution you'd like

I would like to be able to do something like this

And the token from the otlp receiver will be passed in the Authorization header.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners for extension/bearertokenauth: @jpkrohling @frzifus. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[atoulme]

This is a string interpolation in our config. I believe this is supported in general in the yaml with expressions such as ${env:ACCESS_TOKEN}. See https://opentelemetry.io/docs/collector/configuration/#environment-variables

[jpkrohling]

The config you shared looks odd. Where did you get it from? Here's an excerpt from the documentation:

extensions:
  bearertokenauth:
    token: "somerandomtoken"
    filename: "file-containing.token"

In any case, it's not very clear what you want to achieve. Do you have an IDP like Keycloak somewhere and you want the Collector to authenticate against it? In that case, you probably need the OIDC auth extension instead.

https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/extension/oidcauthextension