All customers connecting to CockroachCloud Free clusters with sslmode=verify-full (the default) lost the ability to connect for about twelve hours. The TLS certificate in use by the SQL gateways expired, and the systems responsible for renewing the certificate were not functioning properly. Customers could again connect once we manually renewed the certificates.
We are working to repair our automated certificate renewal systems, and we have scheduled work to improve the monitoring of certificate expiration.
Thank you for your patience during this outage.