added extraction of top level metadata for custom lables in prometheu…

[shivamrawat1]

Relevant issues

The custom_prometheus_metadata_labels feature could only extract labels from nested metadata dictionaries (requester_metadata, user_api_key_auth_metadata), but not from top-level metadata fields like requester_ip_address.

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• I have Added testing in the tests/litellm/ directory, Adding at least 1 test is a hard requirement - see details
• [] My PR passes all unit tests on make test-unit
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• 50-55 passing tests: main is stable with minor issues.
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Type

🆕 New Feature
✅ Test

Changes

Modified litellm/integrations/prometheus.py to include top-level metadata fields in combined_metadata. The code now:

• Extracts all top-level non-dictionary fields from metadata
• Merges them with nested metadata contents (requester_metadata and user_api_key_auth_metadata)

This enables get_custom_labels_from_metadata() to access fields like requester_ip_address directly from top-level metadata.

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Project	Deployment	Review	Updated (UTC)
litellm	Ready	Preview, Comment	Dec 17, 2025 1:27am

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