we just had a short downtime, because the MongoDB cluster was not in a healthy state. I have stopped Squidex and the cluster became healthy again and now it seems to run fine again.
I will update the post as soon as I have more information.
I have this email from Google:
GKE will gradually upgrade clusters’ control planes to Kubernetes v1.16, **beginning on or after October 6, 2020,** as follows: * Clusters running v1.15 will begin upgrading **control plane only** to v1.16 * Node pools **will not be auto-upgraded to v1.16 at this time** , but can be manually upgraded following the instructions below. The following clusters in your project are scheduled for the upgrade: * [Squidex (squidex-157415)](https://www.google.com/appserve/mkt/p/AD-FnEyid0BV_2x_BZ0tz-TOrBUjv6QUt_8rPYAGlkNpN4o0fE0LHJ6r_Jxxo8yFfwGELK4UjeTND79qmJiuhNerKn41TmcsZN7lynAPESJyzGyCWv5qJqEsYEGwR_M) * squidex
But this does not explain it yet, because:
- The control plane was not updated.
- The mail points out that the Node pools (the servers actually hosting Squidex) are not impacted.