observability-designer – skill Thiết kế & UI cho agent AI

Observability Designer (POWERFUL)

Category: Engineering

Tier: POWERFUL

Description: Design comprehensive observability strategies for production systems including SLI/SLO frameworks, alerting optimization, and dashboard generation.

Overview

Observability Designer creates production-ready dashboards, alert configurations, and monitoring strategies across the three pillars (metrics, logs, traces).

When NOT to use → slo-architect. For SLO/SLI design with error-budget math, multi-window burn-rate alerting thresholds, and SLO review gates, route to slo-architect — it is the authoritative skill for that half. This skill's slo_designer.py produces a quick scaffold only. This skill's lane: dashboards (dashboard_generator.py) and alert-noise reduction (alert_optimizer.py).

Quick Start

# Dashboard spec (Grafana JSON + docs) for a service
python3 scripts/dashboard_generator.py --service-type api --name payments --criticality critical --role sre --format grafana -o dashboard.json --doc-output dashboard.md

# Analyze an existing alert config for noise, duplicates, and coverage gaps
python3 scripts/alert_optimizer.py --input alerts.json --analyze-only --report alert_report.json
# ...then emit the optimized config once the report is reviewed:
python3 scripts/alert_optimizer.py --input alerts.json --output alerts_optimized.json

# Quick SLO scaffold (hand off to slo-architect for the real error-budget work)
python3 scripts/slo_designer.py --service-type api --criticality high --user-facing true --service-name payments -o slo_scaffold.json

Verification loop: after deploying optimized alerts, track the report's noise metrics for one on-call rotation — if the actionable-alert ratio didn't improve, re-run --analyze-only against the live config and iterate. Import the generated dashboard into Grafana and confirm every golden-signal panel renders with live data before closing the task.

Core Competencies

SLI/SLO/SLA Framework Design

• Service Level Indicators (SLI): Define measurable signals that indicate service health
• Service Level Objectives (SLO): Set reliability targets based on user experience
• Service Level Agreements (SLA): Establish customer-facing commitments with consequences
• Error Budget Management: Calculate and track error budget consumption
• Burn Rate Alerting: Multi-window burn rate alerts for proactive SLO protection

Three Pillars of Observability

Metrics

• Golden Signals: Latency, traffic, errors, and saturation monitoring
• RED Method: Rate, Errors, and Duration for request-driven services
• USE Method: Utilization, Saturation, and Errors for resource monitoring
• Business Metrics: Revenue, user engagement, and feature adoption tracking
• Infrastructure Metrics: CPU, memory, disk, network, and custom resource metrics

Logs

• Structured Logging: JSON-based log formats with consistent fields
• Log Aggregation: Centralized log collection and indexing strategies
• Log Levels: Appropriate use of DEBUG, INFO, WARN, ERROR, FATAL levels
• Correlation IDs: Request tracing through distributed systems
• Log Sampling: Volume management for high-throughput systems

Traces

• Distributed Tracing: End-to-end request flow visualization
• Span Design: Meaningful span boundaries and metadata
• Trace Sampling: Intelligent sampling strategies for performance and cost
• Service Maps: Automatic dependency discovery through traces
• Root Cause Analysis: Trace-driven debugging workflows

Dashboard Design Principles

Information Architecture

• Hierarchy: Overview → Service → Component → Instance drill-down paths
• Golden Ratio: 80% operational metrics, 20% exploratory metrics
• Cognitive Load: Maximum 7±2 panels per dashboard screen
• User Journey: Role-based dashboard personas (SRE, Developer, Executive)

Visualization Best Practices

• Chart Selection: Time series for trends, heatmaps for distributions, gauges for status
• Color Theory: Red for critical, amber for warning, green for healthy states
• Reference Lines: SLO targets, capacity thresholds, and historical baselines
• Time Ranges: Default to meaningful windows (4h for incidents, 7d for trends)

Panel Design

• Metric Queries: Efficient Prometheus/InfluxDB queries with proper aggregation
• Alerting Integration: Visual alert state indicators on relevant panels
• Interactive Elements: Template variables, drill-down links, and annotation overlays
• Performance: Sub-second render times through query optimization

Alert Design and Optimization

Alert Classification

• Severity Levels:
• Critical: Service down, SLO burn rate high
• Warning: Approaching thresholds, non-user-facing issues
• Info: Deployment notifications, capacity planning alerts
• Actionability: Every alert must have a clear response action
• Alert Routing: Escalation policies based on severity and team ownership

Alert Fatigue Prevention

• Signal vs Noise: High precision (few false positives) over high recall
• Hysteresis: Different thresholds for firing and resolving alerts
• Suppression: Dependent alert suppression during known outages
• Grouping: Related alerts grouped into single notifications

Alert Rule Design

• Threshold Selection: Statistical methods for threshold determination
• Window Functions: Appropriate averaging windows and percentile calculations
• Alert Lifecycle: Clear firing conditions and automatic resolution criteria
• Testing: Alert rule validation against historical data

Runbook Generation and Incident Response

Runbook Structure

• Alert Context: What the alert means and why it fired
• Impact Assessment: User-facing vs internal impact evaluation
• Investigation Steps: Ordered troubleshooting procedures with time estimates
• Resolution Actions: Common fixes and escalation procedures
• Post-Incident: Follow-up tasks and prevention measures

Incident Detection Patterns

• Anomaly Detection: Statistical methods for detecting unusual patterns
• Composite Alerts: Multi-signal alerts for complex failure modes
• Predictive Alerts: Capacity and trend-based forward-looking alerts
• Canary Monitoring: Early detection through progressive deployment monitoring

Golden Signals Framework

Latency Monitoring

• Request Latency: P50, P95, P99 response time tracking
• Queue Latency: Time spent waiting in processing queues
• Network Latency: Inter-service communication delays
• Database Latency: Query execution and connection pool metrics

Traffic Monitoring

• Request Rate: Requests per second with burst detection
• Bandwidth Usage: Network throughput and capacity utilization
• User Sessions: Active user tracking and session duration
• Feature Usage: API endpoint and feature adoption metrics

Error Monitoring

• Error Rate: 4xx and 5xx HTTP response code tracking
• Error Budget: SLO-based error rate targets and consumption
• Error Distribution: Error type classification and trending
• Silent Failures: Detection of processing failures without HTTP errors

Saturation Monitoring

• Resource Utilization: CPU, memory, disk, and network usage
• Queue Depth: Processing queue length and wait times
• Connection Pools: Database and service connection saturation
• Rate Limiting: API throttling and quota exhaustion tracking

Distributed Tracing Strategies

Trace Architecture

• Sampling Strategy: Head-based, tail-based, and adaptive sampling
• Trace Propagation: Context propagation across service boundaries
• Span Correlation: Parent-child relationship modeling
• Trace Storage: Retention policies and storage optimization

Service Instrumentation

• Auto-Instrumentation: Framework-based automatic trace generation
• Manual Instrumentation: Custom span creation for business logic
• Baggage Handling: Cross-cutting concern propagation
• Performance Impact: Instrumentation overhead measurement and optimization

Log Aggregation Patterns

Collection Architecture

• Agent Deployment: Log shipping agent strategies (push vs pull)
• Log Routing: Topic-based routing and filtering
• Parsing Strategies: Structured vs unstructured log handling
• Schema Evolution: Log format versioning and migration

Storage and Indexing

• Index Design: Optimized field indexing for common query patterns
• Retention Policies: Time and volume-based log retention
• Compression: Log data compression and archival strategies
• Search Performance: Query optimization and result caching

Cost Optimization for Observability

Data Management

• Metric Retention: Tiered retention based on metric importance
• Log Sampling: Intelligent sampl

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