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Logging ve Monitoring

Giriş

Logging ve monitoring, modern .NET uygulamalarında observability, debugging, performance tracking ve operational excellence için kritik öneme sahiptir. Mid-level geliştiriciler için comprehensive logging strategies, monitoring solutions ve observability tools'ları anlamak, production-ready uygulamalar geliştirmek ve maintain etmek için gereklidir. Bu bölüm, Serilog/ELK Stack, Application Insights, OpenTelemetry, log aggregation ve performance monitoring konularını kapsar.

Kapsanan Konular

1. Serilog/ELK Stack

Structured logging with Serilog, ELK Stack integration, ve centralized log management.

Öğrenilecekler: - Serilog configuration - Structured logging - ELK Stack setup - Log enrichment - Log correlation

2. Application Insights

Azure Application Insights integration, application performance monitoring, ve telemetry collection.

Öğrenilecekler: - Application Insights setup - Custom telemetry - Performance monitoring - Dependency tracking - User analytics

3. OpenTelemetry

Open-source observability framework, distributed tracing, ve metrics collection.

Öğrenilecekler: - OpenTelemetry setup - Distributed tracing - Metrics collection - Log correlation - Vendor agnostic approach

4. Log Aggregation

Centralized log collection, log processing, ve log analysis.

Öğrenilecekler: - Log aggregation strategies - Log processing pipelines - Log storage optimization - Log search and analysis - Log retention policies

5. Performance Monitoring

Application performance monitoring, performance metrics, ve performance optimization.

Öğrenilecekler: - Performance metrics collection - Performance bottlenecks identification - Performance optimization strategies - Performance testing - Capacity planning

Neden Önemli?

1. Operational Excellence

  • Proactive issue detection
  • Faster incident response
  • Better debugging capabilities
  • Improved system reliability

2. Performance Optimization

  • Performance bottleneck identification
  • Resource utilization monitoring
  • Scalability planning
  • User experience improvement

3. Business Intelligence

  • User behavior analysis
  • Business metrics tracking
  • Decision making support
  • ROI measurement

4. Compliance & Security

  • Audit trail requirements
  • Security monitoring
  • Compliance reporting
  • Incident investigation

Mülakat Soruları

Temel Sorular

  1. Logging nedir ve neden önemlidir?

  2. Cevap: Application behavior tracking, debugging, monitoring, compliance requirements.

  3. Structured logging nedir?

  4. Cevap: Machine-readable log format, JSON logging, log parsing, log analysis.

  5. ELK Stack nedir?

  6. Cevap: Elasticsearch, Logstash, Kibana, centralized logging, log analysis.

  7. Application Insights nedir?

  8. Cevap: Azure monitoring service, APM, telemetry collection, performance monitoring.

  9. OpenTelemetry nedir?

  10. Cevap: Open-source observability, vendor agnostic, distributed tracing, metrics.

Teknik Sorular

  1. Serilog nasıl configure edilir?

  2. Cevap: Sinks configuration, enrichers, filters, structured logging.

  3. Distributed tracing nasıl implement edilir?

  4. Cevap: Correlation IDs, span creation, trace propagation, context injection.

  5. Log aggregation nasıl yapılır?

  6. Cevap: Centralized collection, processing pipelines, storage optimization.

  7. Performance monitoring nasıl yapılır?

  8. Cevap: Metrics collection, bottleneck identification, optimization strategies.

  9. Custom telemetry nasıl eklenir?

  10. Cevap: Custom events, custom metrics, custom dimensions, telemetry API.

Best Practices

1. Logging Strategy

  • Use structured logging
  • Implement log levels appropriately
  • Add correlation IDs
  • Include context information
  • Plan log retention

2. Monitoring Setup

  • Define key metrics
  • Set up alerting
  • Implement health checks
  • Monitor dependencies
  • Track business metrics

3. Performance Optimization

  • Minimize logging overhead
  • Use async logging
  • Implement log buffering
  • Optimize log storage
  • Monitor logging performance

4. Security & Compliance

  • Secure log transmission
  • Implement access control
  • Handle sensitive data
  • Meet compliance requirements
  • Audit log access

5. Operational Excellence

  • Set up proactive monitoring
  • Implement automated alerting
  • Create runbooks
  • Plan incident response
  • Continuous improvement

Kaynaklar