Managed Kubernetes - Intermittent Control Plane Unavailability

Incident Report for IONOS CLOUD

Resolved

The incident has been mitigated successfully at approx. 19:00 UTC, 23.09.2026. The teams involved are currently investigating the root cause and we will publish a report here once it is compiled.
Posted Sep 24, 2026 - 05:43 UTC

Identified

We have successfully identified and mitigated a high-latency condition in our core storage infrastructure that temporarily impacted the responsiveness of the Kubernetes control plane. Our engineering team is currently executing a phased reconciliation and rollout process to gracefully restart the management instances and restore full functionality. Existing application workloads continue to run normally and remain unaffected.
Posted Sep 23, 2026 - 18:32 UTC

Investigating

We are currently experiencing control plane instability affecting our managed Kubernetes clusters. While existing application workloads continue to run normally, administrative and management capabilities are currently degraded. Our engineering team is actively working on a resolution, and we will provide updates as new information becomes available.
Posted Sep 23, 2026 - 17:15 UTC
This incident affected: Location DE/FRA (Managed Kubernetes).