Asura

19 monitor types - HTTP, HTTP Multi-Step, TCP, DNS, ICMP, TLS, WebSocket, gRPC, MQTT, Docker, Domain/WHOIS, Command, SMTP, SSH, Redis, PostgreSQL, UDP, Heartbeat, Manual 13 notification channels - Webhook, Email, Telegram, Discord, Slack, ntfy, Teams, PagerDuty, Opsgenie, Pushover, Google Chat, Matrix, Gotify Assertions - Status code, body text, regex, JSONPath, headers, response time, cert expiry, DNS records with AND/OR group logic Multi-step HTTP chains - Up to 5 sequential requests with variable extraction (regex/JSONPath) between steps Distributed probe agents - Run checks from multiple locations with a lightweight agent binary (~16MB) Anomaly detection - Statistical baseline with configurable sensitivity, auto-degrades on response time spikes Live dashboard - Real-time SSE push with sparklines, uptime heatmap, and bulk operations Public status pages - 90-day uptime bars, incidents, email/webhook subscriptions, RSS feed, password protection Incident severity - Critical, major, minor, warning levels with auto-assignment Escalation policies - Time-based notification chains with per-step delays and repeat SLA tracking - Per-monitor targets, error budgets, breach alerts, monthly reports Cron maintenance - 6 scheduling modes: manual, one-time, cron, daily, weekly, monthly Encryption at rest - AES-256-GCM for notification secrets and proxy passwords Data rollup - Hourly and daily aggregates for long-running instances Change detection - Line-level diffs on HTTP response bodies Security - TOTP 2FA, role-based API keys, SSRF protection, rate limiting