SonarOps
Monitoring that shows what broke, not just that it did.
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About SonarOps
I built SonarOps because every monitoring tool I tried told me a site was down — never why. So I built the one I wanted. It checks your sites every 60 seconds from probes in the EU and USA. When one probe sees an outage, a second probe in another region confirms it before I page you, so a local network blip doesn't wake you at 3am. That cross-check costs a second or two of detection delay. I think it's worth it. Beyond up/down, SonarOps shows where the time goes: DNS, TLS handshake, first byte, full load. SSL Sentinel tracks certificate expiry with reminders at 60, 30, 14 and 7 days and full chain validation, not just the leaf. Deep Scan crawls your site for broken links. Alerts go to email, Telegram or webhook, with a cooldown so you get signal, not spam. One developer, no VC.
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100% EU data residency — proved by killing my own primary
This week I moved the last piece of SonarOps infrastructure to Europe: primary database in Germany, the only replica in Finland, a witness node in a third datacenter to break ties. The US server is now a pure monitoring probe — it runs checks from a US vantage point, it stores zero customer data. This morning I validated it the only way that counts: powered off the production primary on purpose. ~3 minutes for the standby and the witness to agree it was really down, ~90 seconds of automation — replica promoted, traffic IP moved, DNS switched, alert pipeline restarted. Customer status pages included, with TLS certs pre-synced instead of issued mid-outage. Then I rebuilt the old primary from the survivor with zero data loss and switched back. For EU agencies that care where monitoring data sleeps, "EU data residency" is now a shipped fact, not a roadmap line.
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Really impressed with the cross-region probe strategy here. The dual-probe verification before paging significantly reduces false alerts. The DNS/TLS/SSL depth tracking and automated certificate expiry reminders are solid additions that mos