**IONOS Cloud Managed Kubernetes experienced a storage infrastructure failure beginning July 18, 2026, caused by a fault in a redundant storage server pair that triggered provisioning queue issues and prevented customers from attaching/detaching storage volumes.** Recovery was complicated by an unsuccessful first hardware replacement attempt, requiring a full data migration to an alternative storage target that took several hours to complete. The incident was resolved on August 4, 2026, after storage migration was fully completed, with a separate follow-up incident opened to track residual Managed Kubernetes performance and stability issues.
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we are marking this incident as resolved as the underlying storage issue has been resolved. We will create a follow up incident for Managed Kubernetes performance and stability issues to avoid confusion.
The migration of storages has been completed, which should prevent further issues with attaching storage. Migration of snapshot data is currently ongoing, so snapshot related activities might still fail to complete successfully.
The first hardware replacement was unsuccessful. Another one is attempted. In the meanwhile a data migration is running to migrate data to another storage target. Due to the amount of data to be migrated the migration is estimated to take several hours.
Hardware replacement was completed. Restoration of redundancy is continuing.
Hardware replacement is being conducted. The team continues to mitigate acute storage provisioning issues until hardware replacement and recovery is completed to minimize customer impact.
The team has encountered a complication during the recovery of the second storage server in the pair. Hardware needs to be replaced. Our datacenter team is working on this task. For customers still affected we are working on implementing a mitigation to unblock storage operations in parallel.
Due to the ongoing restoration effort on the storage server customers might still see residual impact when attaching/detaching storage until redundancy is fully restored. We are resetting the impact of the service back to Degraded Performance.
The incident should now be mitigated. The affected storage server is currently getting restored. Once this is completed, redundancy will be fully restored. We do not see any remaining provisioning issues any longer. We are monitoring the situation and the restoration and will then set the incident to resolved.
We have found an issue with one storage server belonging to a redundant storage server pair. Our team is implementing a mitigation.
While provisioning block could be resolved, we are investigating an increased number of storage related errors. We are directing attention to these remaining issues.
Customers could still see issues with attaching storages on Kubernetes.
Storage issue has successfully been resolved, however, job provisioning is currently not progressing successfully. Our provisioning team is investigating.
Our storage team has confirmed the suspected culprit. We are currently mitigating the issue and will monitor provisioning job execution afterwards.
We have narrowed down the issue and believe we have the culprit identified. We are currently confirming the finding.
We have identified a spike in our provisioning engine queue that is a likely root cause for the issues observed. Our provisioning team is informed and has joined the response.
Initial investigation makes a network connectivity issue unlikely. The team is focusing investigation on Managed Kubernetes side.
We are currently investigating a suspected network connectivity issue influencing the MK8s service. We will keep the status page updated with new information as they become available.
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