SREcon23 Americas - Seeing the Invisible: Two Years at Wikipedia with W3C's Network Error Logging

Seeing the Invisible: Two Years at Wikipedia with W3C's Network Error Logging
Chris Danis, Wikimedia Foundation
If a user's packets get dropped in someone else's network, do they make a sound?
What if you could find out that your users can't reach your website-in near-real-time and completely automatically, with very low rates of both false negatives and false positives? This sounds too good to be true, but it has been exactly Wikipedia's experience as the most popular website in the world to implement W3C's Network Error Logging spec.
We'll give an overview of the technology itself, the tradeoffs Wikimedia made in our implementation, and case studies of several user-visible outages that NEL detected but traditional monitoring missed.
View the full SREcon23 Americas program at www.usenix.org...