24/7 Infrastructure Monitoring & NOC

NOC Architecture Design

FreeBSD Monitoring Infrastructure

• FreeBSD-based monitoring nodes with hardened base installs
• Jail-isolated monitoring stack (Prometheus, Grafana, Alertmanager in separate jails)
• Secure metric collection via sysctl and SNMP over encrypted tunnels
• DTrace-based custom metric probes for kernel and userland
• Multi-host monitoring across jail fleets and bare-metal hosts

Dashboard Engineering

• Grafana dashboards for ZFS pool health, ARC hit ratios, and scrub status
• Jail resource utilization dashboards (CPU, memory, network per jail)
• pf firewall state table and rule hit-rate visualization
• FreeBSD-specific capacity trend panels (ARC size, ZFS fragmentation, GEOM I/O)
• SLA compliance dashboards tied to FreeBSD service uptime metrics

Real-Time Infrastructure Monitoring

Kernel & System Monitoring

• DTrace probes for live kernel and application tracing without restart
• sysctl metric collection (vm.stats, kern.cp_time, hw.physmem)
• devd event monitoring for hardware attach/detach and disk failures
• vmstat, iostat, and top-based real-time system health collection
• Swap pressure detection via vm.swap_info and pageout daemon tracking

Service & Application Monitoring

• Nginx and PHP-FPM health via FreeBSD rc.d service status checks
• Jail-level process monitoring with jls and rctl resource accounting
• Application latency tracing with DTrace pid provider
• Queue depth and worker health for services running inside jails
• MySQL/PostgreSQL performance via FreeBSD-native socket connections

Storage & Database Monitoring

• ZFS ARC hit ratio, L2ARC effectiveness, and prefetch statistics
• Replication lag monitoring for database replicas across jails
• Slow query detection with DTrace mysql provider probes
• ZFS dataset quota utilization tracking per jail
• gstat GEOM I/O latency and throughput monitoring

Alerting & Escalation Engineering

• pf state table saturation alerts and rule match-rate thresholds
• ZFS pool health alerts (degraded vdevs, scrub errors, capacity thresholds)
• Jail resource limit alerts via rctl (memory ceiling, CPU percentage, open files)
• devd-triggered alerts for disk failure, NIC flap, and hardware events
• Escalation matrix tied to FreeBSD service criticality tiers
• On-call routing with severity grading for kernel panics vs. service restarts
• Alert delivery via email, Slack, PagerDuty, and webhook integrations

Log Aggregation & Analysis

• FreeBSD syslogd configuration for centralized log collection across hosts
• newsyslog.conf rotation policies with compression and retention controls
• audit(4) trail analysis for security event detection and user activity tracking
• Structured parsing of auth.log, daemon.log, and per-jail log streams
• Nginx and application access log analysis with abuse pattern detection
• pf log parsing for blocked connection analysis and threat intelligence
• High-volume log pipelines from jail fleets into centralized search indexes

Incident Response & Operational Discipline

• ZFS snapshot rollback for rapid filesystem and database recovery
• Jail snapshot restore to known-good state within seconds
• Root cause analysis using DTrace, dmesg, and kernel crash dump analysis
• Post-incident review with audit(4) trail reconstruction
• FreeBSD-specific runbook creation for kernel panics, ZFS degradation, and jail failures
• Recovery validation via jail restart, ZFS scrub verification, and service health checks
• Continuous improvement loops fed by FreeBSD-specific failure pattern analysis

Proactive Monitoring & Capacity Planning

• ZFS pool health tracking via zpool status (scrub errors, resilver progress, vdev state)
• SMART disk monitoring via smartmontools with predictive failure alerting
• gstat GEOM I/O monitoring for disk latency trends and throughput bottlenecks
• ZFS dataset growth projections and quota headroom forecasting
• ARC and L2ARC sizing recommendations based on workload analysis
• Jail density planning with rctl resource accounting projections
• Pre-emptive scaling recommendations for CPU, memory, and ZFS pool expansion

Automated Remediation

• watchdog(8) hardware and software watchdog timers for unresponsive system recovery
• rc.d service restart automation with dependency-aware ordering
• Jail health checks with automatic restart on failed liveness probes
• ZFS snapshot-based automated rollback on corruption detection
• newsyslog rotation validation and stale log cleanup scripts
• Automated ZFS scrub scheduling and backup verification via zfs send/recv checks
• pf table auto-update scripts for dynamic blacklist maintenance

Security Monitoring

• pf firewall logging with real-time blocked connection analysis and state tracking
• blacklistd integration for automatic brute-force IP blocking
• sshguard monitoring for SSH, SMTP, and FTP attack detection
• ipfw counters and rule hit-rate analysis for layered firewall visibility
• GeoIP-based connection alerting via pf tables and Nginx geo modules
• File integrity monitoring with mtree(8) baseline comparison
• Privilege escalation detection via audit(4) and su/sudo event tracking

Compliance & Reporting

• FreeBSD Security Advisory (SA) tracking and patch compliance reporting
• audit(4) compliance trails for regulatory and internal audit requirements
• SLA performance reports tied to FreeBSD service uptime and jail availability
• pkg audit vulnerability scanning reports for all installed ports and packages
• Infrastructure change tracking via etcupdate and freebsd-update logs
• Monthly executive reports covering ZFS health, security posture, and capacity trends

NOC Operational Framework

• FreeBSD-specific runbooks for kernel panics, ZFS failures, jail outages, and pf lockouts
• Jail fleet management procedures for bulk restart, snapshot, and migration operations
• Shift handover checklists covering ZFS scrub status, pf state counts, and jail health
• Documentation standards for FreeBSD-specific configurations, tuning, and sysctl changes
• Change management integration with freebsd-update, pkg upgrade, and etcupdate workflows
• Continuous monitoring improvement driven by DTrace analysis and performance baselines