Inject the K8S_NODE_NAME environment variable when using the kubeletstatsreceiver and serviceAccount authentication

[iblancasa]

Component(s)

No response

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

One of the methods to authenticate with the API for the kubeletstatsreceiver needs the node name. The documentation explains how to do it: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/kubeletstatsreceiver/README.md#service-account-authentication-example

Describe the solution you'd like

It would be nice to inject the environment variable automatically from the operator.

Describe alternatives you've considered

No response

Additional context

No response

[jvoravong]

You can use the OTEL_RESOURCE_ATTRIBUTES_NODE_NAME environment variable injected by the operator to configure the receiver.

Example:

receivers:
  kubeletstats:
    collection_interval: 20s
    auth_type: "serviceAccount"
    endpoint: "https://${env:OTEL_RESOURCE_ATTRIBUTES_NODE_NAME}:10250"
    insecure_skip_verify: true

[iblancasa]

That's a good idea. Maybe we can add that note to the kubeletstatsreceiver doc.