In single-node setups, guest alerts had Instance == Node, causing
reevaluateActiveAlertsLocked to evaluate them against NodeDefaults
instead of GuestDefaults. Setting guest memory threshold to 0 (disabled)
wouldn't clear existing guest alerts because they were being kept alive
by the still-enabled node memory threshold.
- Add resourceID colon check to distinguish guest IDs (instance:node:vmid)
from node IDs (instance-node) in reevaluateActiveAlertsLocked
- Clear stale alerts in checkMetric when threshold is nil or disabled
- Skip hysteresis validation for disabled thresholds (Trigger <= 0)
- Fix frontend tooltip: "0" not "-1" disables a threshold
- Remove unused findAlertByID helper and its min dependency from update_alerts_test.go
- Remove redundant negative zero test case from utility_test.go (-0.0 == 0.0 in Go)
HandleHostRemoved (0%→100%):
- Empty host ID is no-op
- Clears host offline alert and confirmations
- Clears host metric alerts (CPU, memory)
- Clears host disk alerts
- Clears all alert types together
ReevaluateGuestAlert (0%→100%):
- No active alerts is no-op
- Clears alert when threshold disabled (nil)
- Clears alert when trigger is zero
- Clears alert when value below clear threshold
- Clears alert when value below trigger threshold
- Keeps alert when value above both thresholds
- Processes all metric types (7 types)
- Clears pending alert when threshold disabled
- Uses clear equals trigger when clear is zero
- Ignores alerts for different guests
NormalizeMetricTimeThresholds (0%→100%):
- Updated existing test to call public wrapper instead of internal function
Coverage: 54.6% → 55.6%
- TestClearActiveAlertsEmptyMaps: tests early return when both maps empty
- sanitizeAlertKey: test for input with only slashes/backslashes -> root
Coverage improvement:
- sanitizeAlertKey: 96.4% → 100%
- alerts package: 52.8%
Test coverage for isMonitorOnlyAlert, quietHoursCategoryForAlert, and
ensureValidHysteresis functions that were previously untested. Improves
internal/alerts coverage from 46.4% to 46.8%.
Test coverage for pure utility functions:
- sanitizeAlertKey: string normalization for alert IDs
- abs: absolute value for float64
- isQueueOutlier: queue anomaly detection logic
- scaleThreshold: threshold scaling with ceiling
- calculateMedianInt: integer median calculation
78 test cases added, coverage improved from 45.3% to 46.2%.
