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fix(fastapi): use metrics in cases where PROMETHEUS_MULTIPROC_DIR is defined

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Previously, we restricted this to gunicorn to get it working on aur-dev.
This change makes it usable through any backend, and also no-op if
PROMETHEUS_MULTIPROC_DIR is not defined.

Signed-off-by: Kevin Morris <kevr@0cost.org>
This commit is contained in:
Kevin Morris 2021-11-01 14:18:19 -07:00
parent cdb854259a
commit 9aa8decf40
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3 changed files with 7 additions and 3 deletions
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4
aurweb/routers/html.py
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@ -209,9 +209,7 @@ async def index(request: Request):
@router.get("/metrics")
async def metrics(request: Request):
registry = CollectorRegistry()
if os.environ.get("FASTAPI_BACKEND", "") == "gunicorn": # pragma: no cover
# This case only ever happens in production, when we are running
# gunicorn. We don't test with gunicorn, so we don't cover this path.
if os.environ.get("PROMETHEUS_MULTIPROC_DIR", None): # pragma: no cover
multiprocess.MultiProcessCollector(registry)
data = generate_latest(registry)
headers = {