IONOS Cloud incident

Partial Connectivity Degradation to Control Plane Affecting Kubernetes Operations in Frankfurt (de/fra)

IONOS Cloud experienced a minor incident on May 15, 2026 affecting Managed Kubernetes, lasting 4d 4h. The incident has been resolved; the full update timeline is below.

Started: May 15, 2026, 12:18 PM UTC
Resolved: May 19, 2026, 04:24 PM UTC
Duration: 4d 4h
Detected by Pingoru: May 15, 2026, 12:18 PM UTC

Affected components

Managed Kubernetes

Update timeline

identified May 15, 2026, 12:18 PM UTC

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.
monitoring May 15, 2026, 01:35 PM UTC

A fix has been implemented and we are monitoring the results.
resolved May 19, 2026, 04:24 PM UTC

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.