NH-138965 draft: make resource as a separate lib for joboe

[xuan-cao-swi]

Tl;dr:

Using azure-resource detector for fetching all azure related metadata and map to HostId.AzureVmMetadata

Context:

With this approach, it will avoid the no class found for CloudResourceProvider due to SPI.

azure-resource seems explicitly designed for autoconfigure (e.g. declarative configuration).

Although it will increase the agent (jar) size, and may violate apm-java convention that only do compileOnly for third-party library.

Test Plan:

Standard unit test

Test services data

1. e-2325544509411880452

[cheempz]

I looked a bit more and it seems the trick to getting things to work is setting OTEL_RESOURCE_PROVIDERS_AZURE_ENABLED=true.

Longer story: our distro bundles the upstream agent, which does include the azure resource detector. I updated your test app service with the current apm-java GA release and set the env var, the resulting traces (under xuan-test-java-app-services) do show resource attributes described in https://github.com/open-telemetry/opentelemetry-java-contrib/tree/main/azure-resources. Will update the Jira with points of improvement but can wait for Chubi to tackle those.

[xuan-cao-swi]

Thanks! I think this separate resources is no longer needed?

[cheempz]

Thanks! I think this separate resources is no longer needed?

Yep, i'll close this PR.