Initial commit: Complete Software Architecture course with 11 modules

- Added comprehensive course structure with 11 modules
- Included theoretical content, practical examples, and tasks
- Multi-language code examples (Java, Rust, Node.js, Python)
- Detailed analysis of architectural approaches and trade-offs
- Complete caching strategies documentation
- Architecture examples from real-world systems (Twitter, Netflix, Uber)
- Structured navigation and learning path
- Ready for educational use

modules/module5/sections/06-alerting.md

@@ -0,0 +1,76 @@
+# Alerting
+
+## Навигация
+- [🏠 Главная страница курса](../../../README.md)
+- [📚 Модуль 5](../README.md)
+
+---
+
+## Принципы алертинга
+
+### 1. Alert Fatigue Prevention
+- Только важные алерты
+- Группировка похожих алертов
+- Эскалация по времени
+
+### 2. Alert Classification
+- **Critical** — система недоступна
+- **Warning** — деградация производительности
+- **Info** — информационные уведомления
+
+## Правила оповещений Prometheus
+
+```yaml
+# alerts.yml
+groups:
+- name: application
+  rules:
+  - alert: HighErrorRate
+    expr: rate(http_requests_total{status=~"5.."}[5m]) / rate(http_requests_total[5m]) > 0.05
+    for: 2m
+    labels:
+      severity: critical
+    annotations:
+      summary: "High error rate detected"
+      description: "Error rate is {{ $value }} for {{ $labels.instance }}"
+  
+  - alert: HighResponseTime
+    expr: histogram_quantile(0.95, rate(http_request_duration_seconds_bucket[5m])) > 1
+    for: 5m
+    labels:
+      severity: warning
+    annotations:
+      summary: "High response time"
+      description: "95th percentile response time is {{ $value }}s"
+```
+
+## Конфигурация Alertmanager
+
+```yaml
+# alertmanager.yml
+global:
+  smtp_smarthost: 'localhost:587'
+  smtp_from: 'alerts@example.com'
+
+route:
+  group_by: ['alertname']
+  group_wait: 10s
+  group_interval: 10s
+  repeat_interval: 1h
+  receiver: 'web.hook'
+
+receivers:
+- name: 'web.hook'
+  webhook_configs:
+  - url: 'http://alert-webhook:5001/alerts'
+  
+- name: 'email'
+  email_configs:
+  - to: 'admin@example.com'
+    subject: 'Alert: {{ .GroupLabels.alertname }}'
+    body: |
+      {{ range .Alerts }}
+      Alert: {{ .Annotations.summary }}
+      Description: {{ .Annotations.description }}
+      {{ end }}
+```