Alerting

Notification channels

• Slack / Teams / Discord
• PagerDuty / OpsGenie
• Email (SMTP)
• Webhook (generic)

Sample rule

alert: HighRequestLatency
expr: histogram_quantile(0.95, rate(http_request_duration_seconds_bucket[5m])) > 0.5
for: 10m
labels:
  severity: warning
annotations:
  summary: "p95 latency above 500ms"