IONOS Cloud incident

Managed Kubernetes: Service Degradation for Control Planes in FRA

Minor Resolved View vendor source →

IONOS Cloud experienced a minor incident on March 31, 2026 affecting Managed Kubernetes, lasting 1d 7h. The incident has been resolved; the full update timeline is below.

Started
Mar 31, 2026, 12:22 PM UTC
Resolved
Apr 01, 2026, 08:18 PM UTC
Duration
1d 7h
Detected by Pingoru
Mar 31, 2026, 12:22 PM UTC

Affected components

Managed Kubernetes

Update timeline

  1. investigating Mar 31, 2026, 12:22 PM UTC

    We are currently investigating service degradation for Control Planes of some Kubernetes clusters in the FRA DC.

  2. monitoring Mar 31, 2026, 01:10 PM UTC

    All affected Control Planes have recovered. We are currently monitoring the affected clusters for further anomalies.

  3. resolved Apr 01, 2026, 08:18 PM UTC

    We are marking the incident as resolved, as no further anomalies were detected. The root cause was a transient latency issue in one of the redundant CoreDNS pods, which led to kube-apiservers being unable to discover etcd instances in time. We are currently developing better mitigation options for the excessive NXDOMAIN requests observed during the incident.