how to pass the authentication extension username to processor

[pkalvagit]

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Describe the issue you're reporting

hi There,

I have implemented basic auth extension. (which is similar to https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/extension/basicauthextension). Implemented our own custom logic to authenticate.

In Authenticate method, i am getting credentials and successfully able to validate and return client.auth data as well(same as : https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/extension/basicauthextension/extension.go#L111). In Processors, when i try to access metadata using md, _ := metadata.FromIncomingContext(ctx) i am getting empty list in processors. if call same code md, _ := metadata.FromIncomingContext(ctx) in authentication extension, i am getting headers with authorization key.

Now, question is how to can pass cleint.username(https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/extension/basicauthextension/config.go#L26) from config.yaml ( where i define pipeline with extensions, receivers, processors, exporters) which is returned from authentication extension https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/extension/basicauthextension/extension.go#L111.

Any help is highly appreciated!

In opentelemetry collector i have seen comments to access client info form authentication to processor authprinter processors but there is no clear example https://github.com/open-telemetry/opentelemetry-collector/blob/extension/auth/v0.87.0/client/client.go#L68 .. i tried to refer as mentioned in documentiaon https://github.com/open-telemetry/opentelemetry-collector/blob/extension/auth/v0.87.0/client/client.go#L68.. not sure how to refer that

[github-actions]

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

[jpkrohling]

Can you share the config for your collector? Are you setting the IncludeMetadata flag in your receiver?

[crobert-1]

Hello @pkalvagit, without the full configuration you're using we can't provide any more guidance than what @jpkrohling has shared. I'm going to close for now, but please feel free to reopen and share more information!