CheckPulse
Multi-region uptime, DNS, and SSL monitoring for agencies. Deployed, public, and handling real traffic.
Systems I have actually built, at the size they actually are. Each page states what is running, what is still in progress, and where the numbers came from.
Multi-region uptime, DNS, and SSL monitoring for agencies. Deployed, public, and handling real traffic.
A ~250-line Python watchdog that runs on a different host from the agent fleet it watches, built after a cron job failed 970 times in four days and alerted exactly once.
Two PowerDNS nodes behind a keepalived VIP. Replication was silently dead, two health checks in a row could not return failure, and only a real failover test caught the second one.
Nightly restic backups to a host on different physical hardware, proven by an actual restore: 9,849 messages read back out of the restored database.
Go master-worker system that parses a 3.3 GB, 10M-line access log. 36s single worker, 6s at 8-11 workers.
A Go gateway written from scratch: JWT auth with RBAC, layered rate limiting, round-robin load balancing, Prometheus metrics.
Three Talos clusters across a 7-host vSphere estate. Design freeze, IP plan, and failure tests written before any VM exists.
Kafka-based event pipeline built in explicit tiers. Producer, consumer, and metrics are working; the reliability tiers are not built yet.
Terraform modules for provisioning AWS environments, wired to a CI deployment workflow.
A 7-host vSphere cluster that runs everything else on this page, managed through the vCenter API rather than the web UI.
dev, staging and production RKE2 clusters on bare vSphere, with VIP failover proved by forcing a leadership transfer rather than assuming one.
76 scrape targets feeding a metrics stack that is deliberately not allowed to page me, because alerting stays in one place.
Exposing an on-premise Kubernetes cluster to the internet through a Cloudflare tunnel, while the existing production site keeps serving as the rollback.