We are marking this incident as resolved. The root cause of the service degradation affecting Kubernetes Control Planes in FRA has been identified as a DDoS attack targeting customers hosted on our infrastructure. This incident has been documented here: https://status.ionos.cloud/incidents/kknrz6284jl0
The identified bottleneck led to the observed intermittent reachability issues and increased latency between Kubernetes etcd nodes for the affected customers.
Posted May 19, 2026 - 16:24 UTC
Monitoring
A fix has been implemented and we are monitoring the results.
Posted May 15, 2026 - 13:35 UTC
Identified
We are currently investigating service degradation for Control Planes of some Kubernetes clusters in the Frankfurt region (de/fra). This could impact K8s workload changes for several customers. Our teams are working on a fix.
Posted May 15, 2026 - 12:18 UTC
This incident affected: Location DE/FRA (Managed Kubernetes).
