litellm/tests
ohadgur 0bb26c3f1b
feat(proxy): add Prisma DB pool and engine health metrics to Prometheus (#22655)
* feat(proxy): add Prisma DB pool and engine health metrics to Prometheus

Add a PrismaMetricsCollector that periodically queries pg_stat_activity
and the Prisma engine process to expose connection pool and engine health
as Prometheus gauges/counters. Auto-enabled when prometheus_system is in
service_callback.

New metrics:
- litellm_db_pool_active_connections (Gauge)
- litellm_db_pool_idle_connections (Gauge)
- litellm_db_pool_total_connections (Gauge)
- litellm_db_pool_waiting_connections (Gauge)
- litellm_db_engine_up (Gauge)
- litellm_db_engine_restarts_total (Counter)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address Greptile review feedback

- Only increment engine_restarts counter on heavy reconnects (engine
  actually dead), not lightweight network-blip reconnects
- Fix potential KeyError in _get_or_create_gauge/counter fallback path
  when REGISTRY._names_to_collectors is absent
- Rename litellm_db_pool_waiting_connections to
  litellm_db_pool_lock_waiting_connections to clarify it measures lock
  contention, not pool slot queuing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: warn when prometheus_system enabled but watchdog disabled

Log a warning when users have prometheus_system in service_callback
but PRISMA_HEALTH_WATCHDOG_ENABLED=false, since DB pool and engine
metrics won't be collected in that configuration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* ci: retrigger CI checks

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: use labeled gauge for DB pool connection metrics

Replace 3 separate pool gauges (active, idle, total) with a single
`litellm_db_pool_connections` gauge using a `state` label. This is more
Prometheus-idiomatic and exposes all pg_stat_activity states (active,
idle, idle in transaction, etc.) without ambiguity about what "total"
includes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address Greptile review — stale labels and fallback re-registration

- Zero out known pg_stat_activity states that are absent from the current
  query result, preventing stale gauge values from persisting.
- Simplify _get_or_create_gauge/counter by removing the fallback loop
  that could re-register an already-registered metric (ValueError).
- Add test for stale label clearing across collection cycles.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: include "unknown" in _PG_STATES for stale label clearing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: collect immediately on start and consolidate into single query

- Move sleep to end of loop so metrics appear on /metrics immediately
  after startup instead of after a 30s delay.
- Combine pool state and lock waiting queries into a single SQL query
  using conditional aggregation, halving per-cycle DB overhead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: prevent tight spin loop on collection error

Move asyncio.sleep outside the try/except so it always executes even
when _collect_engine_health() or _collect_pool_metrics() raises.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: add multiprocess_mode to _get_or_create_gauge initialization

- Include `multiprocess_mode` parameter to properly support multiprocessing in Gauge creation.
- Ensure consistent behavior for labeled and unlabeled Gauges.

* fix: handle invalid env var and document watchdog prerequisite

- Add try/except ValueError for PRISMA_METRICS_COLLECTION_INTERVAL_SECONDS
  to prevent proxy startup crash on non-numeric values (e.g. "30s")
- Document that DB metrics require both prometheus_system callback and
  PRISMA_HEALTH_WATCHDOG_ENABLED=true

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: use defensive null coalescing for query_raw row values

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: add invalid env var fallback test and fix mock signature

- Add test for non-numeric PRISMA_METRICS_COLLECTION_INTERVAL_SECONDS
- Add **kwargs to mock _patched_get_or_create_gauge for forward compat

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-09 08:49:46 -07:00
..
agent_tests [Release Fix] (#22411) 2026-02-28 09:46:35 -08:00
audio_tests
basic_proxy_startup_tests CircleCI test stability (#23055) 2026-03-07 15:19:39 -08:00
batches_tests Merge pull request #22625 from BerriAI/litellm_azure_ai_finetune 2026-03-03 19:42:17 +05:30
code_coverage_tests feat(search): add Serper (serper.dev) as search provider (#23112) 2026-03-09 08:40:37 -07:00
documentation_tests fix failing tests 2026-02-21 15:48:26 -08:00
enterprise feat: allow multiple calls from tags 2026-03-07 11:24:18 +05:30
guardrails_tests fix: bump litellm-proxy-extras to 0.4.50 and fix 3 failing tests (#22417) 2026-02-28 10:20:03 -08:00
image_gen_tests Fix: varaitions endpoint geting 401 2026-03-09 12:51:21 +05:30
litellm [Fix] Constrain feature_name to Literal, deduplicate runtime flags, fix silent test swallowing 2026-03-05 15:42:17 -08:00
litellm_core_utils
litellm_utils_tests Merge pull request #20688 from BerriAI/litellm_budget_tier_enforcement_for_keys 2026-03-06 20:44:58 -08:00
litellm-proxy-extras
llm_responses_api_testing Fix anthropic responses 2026-02-20 17:30:42 -08:00
llm_translation Fix mistral ocr failing test 2026-03-09 11:29:33 +05:30
load_tests
local_testing fix(tests): fix repeating chunk and audio usage streaming tests (#23061) 2026-03-07 16:18:51 -08:00
logging_callback_tests CircleCI test stability (#23055) 2026-03-07 15:19:39 -08:00
mcp_tests CircleCI test stability (#23055) 2026-03-07 15:19:39 -08:00
multi_instance_e2e_tests
ocr_tests
old_proxy_tests/tests
openai_endpoints_tests test(responses): add end-to-end test for responses API WebSocket mode 2026-03-02 17:24:39 +05:30
otel_tests
pass_through_tests Fix test_anthropic_messages_openai_model_streaming_cost_injection & openrouter image gen 2026-03-09 11:29:04 +05:30
pass_through_unit_tests [Release Fix] (#22411) 2026-02-28 09:46:35 -08:00
proxy_admin_ui_tests Fix CVEs: bump tar/minimatch/pypdf + harden Docker SBOM patching (#23082) 2026-03-07 18:31:27 -08:00
proxy_e2e_anthropic_messages_tests fix(ci): image variation openai sdk 2.24.0 compat + swap bedrock nova-premier to nova-pro (#23066) 2026-03-07 16:41:54 -08:00
proxy_e2e_azure_batches_tests Add tenacity to e2e Azure batch CI and revert importorskip 2026-03-04 11:45:14 -03:00
proxy_security_tests
proxy_unit_tests CircleCI test stability (#23055) 2026-03-07 15:19:39 -08:00
router_unit_tests [Release Fix] (#22411) 2026-02-28 09:46:35 -08:00
scim_tests
search_tests feat(search): add Serper (serper.dev) as search provider (#23112) 2026-03-09 08:40:37 -07:00
spend_tracking_tests
store_model_in_db_tests
test_litellm feat(proxy): add Prisma DB pool and engine health metrics to Prometheus (#22655) 2026-03-09 08:49:46 -07:00
unified_google_tests
vector_store_tests
windows_tests
__init__.py
gettysburg.wav
large_text.py
openai_batch_completions.jsonl
README.MD
test_budget_management.py
test_callbacks_on_proxy.py
test_config.py
test_debug_warning.py
test_default_encoding_non_root.py
test_end_users.py
test_entrypoint.py
test_fallbacks.py
test_gpt5_azure_temperature_support.py
test_health.py
test_keys.py
test_litellm_proxy_responses_config.py
test_logging.conf
test_models.py
test_openai_endpoints.py
test_organizations.py
test_otel_thread_leak.py
test_passthrough_endpoints.py
test_presidio_latency.py
test_proxy_server_non_root.py
test_ratelimit.py
test_resource_cleanup.py
test_service_logger_otel.py
test_spend_logs.py
test_team_logging.py
test_team_members.py
test_team.py fix(test): skip 'projects' field in team update assertion (#21777) 2026-02-21 10:24:53 -08:00
test_users.py fix(tests): update deprecated Anthropic model in test_user_model_access (#21826) 2026-02-21 14:18:24 -08:00

In total litellm runs 1000+ tests

[02/20/2025] Update:

To make it easier to contribute and map what behavior is tested,

we've started mapping the litellm directory in tests/test_litellm

This folder can only run mock tests.