Usecase Overview

• Business Goal: Detect error or security events in plugin logs, raise alerts within one minute, and deliver them to external platforms via webhook with at least three retries and downgrade options.
• Success Metrics: Initial webhook delivery success ≥ 97%, cumulative ≥ 99%; downgrade engages email/SMS after three failures; alert acknowledgement rate ≥ 95%.
• Scenario Alignment: Implements Stage 2/3 detection and notification in the parent scenario, providing context for manual or automated remediation.

Rule-driven detection plus downgrade controls ensures log anomalies are surfaced promptly and routed into the correct incident flows.

Context & Assumptions

• Prerequisites
  • Feature flags monitoring-service, alert-gateway-v2, and webhook-delivery-fallback are enabled.
  • Log shippers push structured fields (level, tenant_id, plugin_id, trace_id) into the centralized log service.
  • Tenants configure webhook endpoints, auth methods, and fallback channels.
  • External alerting platforms support HMAC signatures and idempotent retry handling.
• Inputs / Outputs
  • Inputs: Log stream, rule configuration, tenant alert preferences, retry policy.
  • Outputs: Webhook requests, retry schedules, downgrade email/SMS, alert state transitions.
• Boundaries
  • Rule configuration UI is managed by governance teams outside this usecase.
  • Does not create downstream tickets directly; webhook payloads allow external systems to do so.
  • Bulk generation for offline log replay relies on separate compensation scripts.

Solution Blueprint

Architecture Layers

Layer	Module	Responsibility	Code Entry
Parsing	internal/logs/rules/error_burst_detector.go	Parse rules, run sliding windows, aggregate anomalies	services/logs/rules
Alerting	internal/alerts/alert_builder.go	Build alert events, set severity, enrich context	services/alerts
Delivery	internal/alerts/webhook_dispatcher.go	Dispatch webhooks, handle retries, validate signatures, manage delays	services/alerts
Downgrade	pkg/alerts/downgrade_router.go	Switch to email/SMS after three failures, persist downgrade state	pkg/alerts
Audit & Reporting	internal/alerts/reporting/alert_audit_repository.go	Track alert statuses, audits, and exportable reports	services/alerts/reporting

Flow & Sequence

1. Step 1 – Log Parsing: Rule engine subscribes to log streams, aggregates by tenant/plugin, and detects spikes within five minutes.
2. Step 2 – Alert Construction: Builds alert payloads with tenant, plugin, summary, recommended actions, and trace identifiers.
3. Step 3 – Webhook Delivery: Webhook dispatcher signs requests, applies retry policies, and records attempts.
4. Step 4 – Downgrade Handling: After three consecutive failures, downgrade router switches to email/SMS and flags the state as “Downgraded”.
5. Step 5 – Audit Updates: Alert audit store records delivery results and updates the alert center for ownership.

Contracts & Interfaces

• Inbound
  • STREAM logs.plugin.* — Includes level, message, tenant_id, plugin_id, ts.
  • config/log_rules/*.yaml — Defines rules, keywords, thresholds, and severity.
• Outbound
  • POST <tenant_webhook> — Uses headers X-PowerX-Signature, X-PowerX-Alert-ID; payload contains tenant, plugin, error summary, recommended action.
  • POST /alerts/fallback/email, POST /alerts/fallback/sms — Downgrade channels.
  • EVENT monitoring.alert.updated — States DELIVERED, FAILED, DOWNGRADED.
• Scripts
  • scripts/workflows/monitoring-webhook-simulator.mjs — Sandbox webhook simulator.
  • scripts/workflows/monitoring-alert-retry.mjs — Batch retry and remediation script.

Implementation Checklist

Item	Description	Status	Owner
Rule engine	Implement error/security keyword detection, tenant thresholds, windowing	[ ]	Matrix Ops
Webhook delivery	Support signature generation, exponential backoff, failure logging	[ ]	Iris Chen
Downgrade policy	Build email/SMS channels, downgrade states, notification templates	[ ]	Matrix Ops
Audit reporting	Establish audit storage, dashboards, and export scripts	[ ]	Iris Chen
Alert center integration	Update alert UI states, ownership flow, and notes field	[ ]	Iris Chen

Testing Strategy

• Unit: Rule parsing, sliding-window computation, signature verification, downgrade switching.
• Integration: Trigger alerts in sandbox logs, validate retries, downgrades, and audit writes.
• End-to-End: Execute meta scenario cases C-1/C-2 to confirm delivery and downgrade flows.
• Reliability: Simulate webhook timeouts, HTTP 500, network jitter to ensure retries and downgrades engage.

Observability & Ops

• Metrics: monitoring.webhook.delivery_success_rate, monitoring.webhook.retry_total, monitoring.alert.downgrade_total, monitoring.alert.confirmed_total.
• Logs: Record alert_id, tenant_id, plugin_id, attempt, channel, status, latency_ms.
• Alerts: Webhook success rate <95% over 15 minutes triggers P1; >20 downgrades per day trigger governance tasks.
• Dashboards: Grafana “Alert Delivery”, Ops alert center status board.

Rollback & Failure Handling

• Rollback Strategy: Disable webhook-delivery-fallback to revert to legacy channels; pause new rule rollouts.
• Mitigation: Batch retry failed alerts, prompt tenants to validate webhooks, switch to manual notifications.
• Data Repair: Run scripts/workflows/monitoring-reconcile-alerts.mjs to reconcile alert states with audit logs.

Follow-ups & Risks

Risk / Item	Impact	Mitigation	Owner	ETA
Rule noise causing alert storms	Increased on-call load and false positives	Add noise suppression, dynamic thresholds, aggregation	Matrix Ops	2025-11-16
Misconfigured webhooks	Failed alert deliveries	Provide self-check scripts, console validation, automated reminders	Iris Chen	2025-11-18

References & Links

• Scenario: docs/scenarios/runtime-ops/SCN-OPS-SYSTEM-MONITORING-001.md
• Background: docs/meta/scenarios/powerx/core-platform/runtime-ops/system-monitoring-and-alerting/primary.md
• Event model: docs/standards/powerx/backend/integration/06_gateway/EventBus_and_Message_Fabric.md