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FabledSteward/tests/plugins/host_agent/test_ingest_timing.py
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bvandeusenandClaude Opus 5.5 f802c9f153
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feat(host_agent): a dropped ingest says which step of the metric write it stalled in (#5149)
The first instrumented drop on dev read "dropped after 10.0s … (completed:
parse=0.1s)": the whole stall is inside record_metrics. It now marks its
three steps (flush of the rows, the rule and state reads, the per-sample
evaluation) on the caller's phases, and the drop line carries the request's
samples and metric row count.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-06 18:34:54 -04:00

59 lines
1.9 KiB
Python

"""A slow ingest says where its time went, and one dropped when the agent hung
up says how far it got (#5149)."""
import logging
from plugins.host_agent import routes
class _Clock:
def __init__(self):
self.t = 100.0
def __call__(self):
return self.t
async def test_a_slow_ingest_logs_its_phases(app, monkeypatch, caplog):
clock = _Clock()
monkeypatch.setattr(routes.time, "monotonic", clock)
async with app.app_context():
phases = routes._Phases()
clock.t += 0.1
phases.mark("parse")
clock.t += 8.0
phases.mark("metrics")
clock.t += 0.4
phases.mark("commit")
with caplog.at_level(logging.WARNING):
phases.report("web-1", 12, 480, 30, 900)
line = caplog.text
assert "slow 8.5s for host=web-1" in line
assert "parse=0.1s metrics=8.0s commit=0.4s" in line
assert "samples=12 metric_rows=480 containers=30 log_lines=900" in line
async def test_a_quick_ingest_logs_nothing(app, monkeypatch, caplog):
clock = _Clock()
monkeypatch.setattr(routes.time, "monotonic", clock)
async with app.app_context():
phases = routes._Phases()
clock.t += 0.3
phases.mark("commit")
with caplog.at_level(logging.WARNING):
phases.report("web-1", 1, 40, 0, 0)
assert "host_agent ingest" not in caplog.text
async def test_a_dropped_ingest_says_how_far_it_got(app, monkeypatch, caplog):
clock = _Clock()
monkeypatch.setattr(routes.time, "monotonic", clock)
async with app.app_context():
phases = routes._Phases()
clock.t += 0.2
phases.mark("parse")
phases.size = "samples=21 metric_rows=840"
clock.t += 9.9
with caplog.at_level(logging.WARNING):
phases.cancelled("abcd1234")
assert "dropped after 10.1s for token=abcd1234… (completed: parse=0.2s) samples=21 metric_rows=840" in caplog.text