Component(s)

exporter/opensearch

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

An optional ingest pipeline in opensearch would allow post-processing of the received documents (by the collector) and before writing the documents into opensearch. Options could be:

• adjust mapping of incoming documents
• enrich documents
• trigger other pipelines / notifications
• ...

Describe the solution you'd like

The opensearchclient bulk indexer (https://github.com/opensearch-project/opensearch-go/blob/main/opensearchutil/bulk_indexer.go#L86) already supports a pipeline option to be passed. The opensearchexporter? just needs to allow such an pipeline option and pass it to the client.

Describe alternatives you've considered

No response

Additional context

https://docs.opensearch.org/latest/ingest-pipelines/

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