·2 min read
Single-node monitoring is quietly lying to you
If your uptime checks run from one location, you are seeing one network path, not your users. Why single-node monitoring misses real outages and invents fake ones.
Posts tagged
monitoring
Blog
Product updates, incident management notes, and lessons from building Vigiles.
·2 min read
SSL certificates always expire on the worst day
An expired certificate takes your whole site down in a way no code change can fix fast, and it is entirely predictable. Why cert expiry is the outage you can see coming.
·2 min read
DNS fails silently, and you find out last
When DNS breaks, your servers are fine, your usual checks may be fine, and your users cannot reach you at all. Why DNS failures are so easy to miss and how to catch them.
·2 min read
Monitor what you depend on, not just your own app
Your app can be perfectly healthy and still be down because something it relies on failed. Why you should monitor your dependencies, not only yourself.
·2 min read
Recovery alerts matter as much as down alerts
Knowing something broke is half the job. Knowing it came back, and how long it was down, is the other half. Why recovery notifications matter.
·2 min read
What five nines actually costs
Everyone wants five nines until they see the bill. What each extra nine of uptime really costs, and how to pick an availability target that fits your business.