bvandeusenandClaude Opus 5.5
189b492397
SNMP is on by default, so the loader has already mapped snmp_devices under _steward_plugin_snmp; importing plugins.snmp.models defined the table twice (integration lane, run 8788). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
88 lines
3.7 KiB
Python
88 lines
3.7 KiB
Python
"""Integration: an SNMP poll writes each device's outcome to its row and its
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answers to the metric tables, a counter as a rate (milestone 491).
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Requires STEWARD_DATABASE_URL."""
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from __future__ import annotations
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import asyncio
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import importlib
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import os
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import uuid
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import pytest
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pytestmark = pytest.mark.integration
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@pytest.fixture
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def app():
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if not os.environ.get("STEWARD_DATABASE_URL"):
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pytest.skip("needs Postgres")
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from steward.app import create_app
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return create_app(testing=False)
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def _snmp(sub):
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"""A submodule of the snmp plugin as the app loaded it: it is on by
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default, so its models are already mapped under the loader's name, and
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importing plugins.snmp.models would define the table a second time."""
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from steward.core.plugin_manager import get_loaded_plugin_modules
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loaded = get_loaded_plugin_modules().get("snmp")
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return importlib.import_module(f"{loaded.__name__ if loaded else 'plugins.snmp'}.{sub}")
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def test_a_poll_records_why_a_device_is_silent_and_what_another_answered(app):
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from sqlalchemy import select
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from steward.models.metrics import PluginMetricLatest
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scheduler = _snmp("scheduler")
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SnmpDevice = _snmp("models").SnmpDevice
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PollResult = _snmp("poller").PollResult
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tag = uuid.uuid4().hex[:8]
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up, down = f"sw-{tag}", f"ups-{tag}"
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counts = iter([1_000.0, 61_000.0])
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async def fake_poll(address, port, creds, oids):
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if address == "10.9.9.9":
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return PollResult(error="No reply from 10.9.9.9:161 within 5 s.")
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keys = dict((k, o) for o, k in oids)
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assert {"uptime", "if1_in", "if1_status"} <= set(keys) and creds.community == "public"
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return PollResult(readings={"uptime": 8_640_000.0, "if1_status": 1.0, "if1_in": next(counts)},
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missing=["if1_out"])
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async def go():
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from steward.core.crypto import encrypt_secret
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async with app.db_sessionmaker() as s:
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async with s.begin():
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s.add(SnmpDevice(name=up, address="10.9.9.1", presets=["system", "interfaces"],
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interfaces="1", community=encrypt_secret("public")))
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s.add(SnmpDevice(name=down, address="10.9.9.9", presets=["ups"],
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community=encrypt_secret("public")))
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scheduler.RATES = None
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await scheduler._do_poll(app, poll=fake_poll)
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first = await _latest(app, up)
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await asyncio.sleep(1.1)
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await scheduler._do_poll(app, poll=fake_poll)
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async with app.db_sessionmaker() as s:
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rows = {d.name: d for d in (await s.execute(
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select(SnmpDevice).where(SnmpDevice.name.in_([up, down])))).scalars()}
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async with s.begin():
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for d in rows.values():
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await s.delete(d)
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return first, await _latest(app, up), rows
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async def _latest(app, name):
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async with app.db_sessionmaker() as s:
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return {r.metric_name: r.value for r in (await s.execute(select(PluginMetricLatest).where(
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PluginMetricLatest.source_module == "snmp", PluginMetricLatest.resource_name == name))).scalars()}
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first, second, rows = asyncio.run(go())
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assert rows[up].last_error is None and rows[up].last_ok_at is not None and rows[up].missing == ["if1_out"]
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assert rows[down].last_error == "No reply from 10.9.9.9:161 within 5 s." and rows[down].last_ok_at is None
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assert rows[down].last_polled_at is not None
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assert first == {"uptime": 8_640_000.0, "if1_status": 1.0} # a counter needs two samples
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# 60,000 bytes over the 1.1 s or more between the polls, stored as bits
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# per second: at most 436 kbit/s, and above 150 unless a poll took seconds.
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assert 150_000 < second["if1_in"] <= 436_364
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