How to extract labels/custom metadata from a virtual machine in GCP

[nadarashwin]

We have custom metadata/labels on GCP virtual machines that we plan to add as a label to the OTEL collector.
However, don't see how to extract it by referring to https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/processor/resourcedetectionprocessor/README.md#gcp-metadata

There is a way to extract tags for AWS and Azure, so I would like to know if there is a way to do it for GCP virtual machines.
Didn't find it here https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/processor/resourcedetectionprocessor/internal/gcp/documentation.md

For example:
We have custom metadata like env, tier, monitoring, etc which isn't constant but changes for every cluster operation.
We were able to get that information for AWS and Azure, but not for GCP, as it doesn't have a way to extract those custom metadata/labels.

[nadarashwin]

We forked the repo and patched it to extract custom metadata.
yugabyte@1e3b852

And updated the manifest file with the following

processors:
  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourcedetectionprocessor v0.129.0

replaces:
  - github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourcedetectionprocessor => github.com/yugabyte/opentelemetry-collector-contrib/processor/resourcedetectionprocessor yugabyte

P.S: This may not be the recommended way!