Cherry-pick #14875 to 7.x: Refactor metadata generator to support adding metadata across resources #15528
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Cherry-pick of PR #14875 to 7.x branch. Original message:
This PR attempts to refactor metadata generator to support enrichment of resources metadata on top of other resources.
Ex: enriching a pod object with information from a node and namespace object.
This PR does the same only for the autodiscover provider of kubernetes. It adds a configuration
add_resource_metadata
to allow specifying what resources should be used for enrichment.Sample configuration:
this would ensure that we additionally add namespace metadata along with the service metadata.
pods can be enriched with node and namespace metadata. the
namespace
andnode
parameters ofadd_resource_metadata
can takeinclude_*
,exlude_*
configs similar to the parent resource.closes #13873