https://bascht.com/tags/mtu/Recent content in mtu on bascht.comHugo -- gohugo.iode-deThu, 08 Apr 2021 00:00:00 +0000https://bascht.com/tech/2021/04/08/kubernetes-docker-dind-mtu-issues-on-hetzner-cloud/Thu, 08 Apr 2021 00:00:00 +0000https://bascht.com/tech/2021/04/08/kubernetes-docker-dind-mtu-issues-on-hetzner-cloud/(angrily-typed-after-a-wasted-night-of-debugging) Recently we used Hetzners new vSwitch subnets to start adding dedicated servers to one of our Kubernetes Clusters. Especially for CI workloads where we don't need persistent storage, this is really cost-effective, as we could basically replace 4 other worker nodes with a single cheaper node. Upon spawning the first GitLab runner pods on the new node things went south: We saw random build failures bubbling up in jobs that didn't fail for ages: