IONOS Cloud incident
Managed Kubernetes - Intermittent Control Plane Unavailability
Resolved after 12 hours 28 minutes, affecting Managed Kubernetes, on September 23, 2026.
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.
Affected components
Update timeline
- investigating Sep 23, 2026, 05:15 PM UTC
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.
- identified Sep 23, 2026, 06:32 PM UTC
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.
- resolved Sep 24, 2026, 05:43 AM UTC
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.
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