This has been going on for over two hours with no update from Google aside from the single sentence "We are experiencing an issue with Cloud SQL" in the status dashboard.
status.cloud.google.com now shows all green (the note about Cloud SQL has disappeared), but the errors continue, and my Cloud SQL console won't load.
The errors have become less frequent since about 21:00 UTC. The most recent errors I've seen were at 22:45. The update of my instance has finished. As of now (23:03) there is still no new word on the incident page: https://status.cloud.google.com/incident/cloud-sql/21001
One of my Cloud SQL instances disappeared from my dashboard on and off. Of course, that makes me nice and nervous.
My App Engine logs show Cloud SQL connection errors since 17:31 UTC. I use 2nd generation MySQL 5.6. My SQL console shows that the instance is being updated since 18:39 (more than an hour ago). Perhaps that's part of the attempted fix.
My instances have stayed up but I am having problems with API calls. If your instance is down, I wonder if it's isolated to CloudSQL Proxy connections. Seems like this could be an issue at the API level.
status.cloud.google.com now shows an actual incident thread (not just a note). The only new info is that it affects the us-central1 region, but it says we can expect an update by 21:00 UTC.
Still having issues and disconnects
Could it be related to CVE-2021-3156 the 10 years old vulnerability in sudo?
Category 502 hurricane spotted over Mountain View. Expected to reach category 503 before moderating down to category 200 later this evening.
Anyone have any inside contacts at Google who have more information than their useless status page?
In particular, I have a high availability instance (HA!), with a bonus read replica. The main server and the failover server seem to be malfunctioning. The read replica appears to be fine, and I can access that to pull data.