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Outage in IONOS Cloud

MK8s - Connectivity Issue

Resolved Minor
July 18, 2026 - Started 24 days ago - Lasted 17 days
Official incident page

Incident Report

Summary AI Generated

**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.

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.
Components affected
IONOS Cloud Managed Kubernetes

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Latest Updates ( sorted recent to last )
RESOLVED 8 days ago - at 08/04/2026 10:01AM

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.

MONITORING 23 days ago - at 07/19/2026 12:21PM

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.

MONITORING 24 days ago - at 07/18/2026 10:43PM

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.

MONITORING 24 days ago - at 07/18/2026 10:03PM

Hardware replacement was completed. Restoration of redundancy is continuing.

MONITORING 24 days ago - at 07/18/2026 09:31PM

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.

MONITORING 24 days ago - at 07/18/2026 08:24PM

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.

MONITORING 24 days ago - at 07/18/2026 07:27PM

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.

MONITORING 24 days ago - at 07/18/2026 05:54PM

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.

IDENTIFIED 24 days ago - at 07/18/2026 05:24PM

We have found an issue with one storage server belonging to a redundant storage server pair. Our team is implementing a mitigation.

IDENTIFIED 24 days ago - at 07/18/2026 04:54PM

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.

IDENTIFIED 24 days ago - at 07/18/2026 03:51PM

Storage issue has successfully been resolved, however, job provisioning is currently not progressing successfully. Our provisioning team is investigating.

IDENTIFIED 24 days ago - at 07/18/2026 03:03PM

Our storage team has confirmed the suspected culprit. We are currently mitigating the issue and will monitor provisioning job execution afterwards.

IDENTIFIED 24 days ago - at 07/18/2026 02:47PM

We have narrowed down the issue and believe we have the culprit identified. We are currently confirming the finding.

IDENTIFIED 24 days ago - at 07/18/2026 02:26PM

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.

INVESTIGATING 24 days ago - at 07/18/2026 01:55PM

Initial investigation makes a network connectivity issue unlikely. The team is focusing investigation on Managed Kubernetes side.

INVESTIGATING 24 days ago - at 07/18/2026 01:33PM

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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