Thursday 10th December 2020

Reverse Proxies Retroactive: Sozu reverse proxy TLS and HTTP errors

Today, between 17:24 UTC and 17:34 UTC, customers using our Sozu reverse proxies may have noticed errors when connecting through one of the proxies. An upgrade maintenance was ongoing which led to stop the Sozu service and a reboot of the machine. Unfortunately, the traffic wasn't correctly redirected to an alternative instance, leading to various TLS errors or HTTP errors when connecting to the non-healthy instance. Once the machine was up again, the traffic would be correctly handled.

The root cause have not yet been found but this shouldn't have happened as we routinely do such maintenance operations without any issues. We will look further into this. Apologies for the inconvenience.