Maintenance and Additional Source IP Address for Internet-bound Traffic (September 28, 2026)
We have scheduled maintenance of the network equipment for the IZ1-01 cluster.
We apologize for any inconvenience and appreciate your understanding and cooperation.
During the maintenance window, connectivity between IZ1-01 and the Internet and other external networks will be interrupted multiple times. While connectivity is interrupted, access from external networks and communication from workloads to external services will be unavailable.
Scheduled Maintenance Date:
Monday, September 28, 2026
Time:
10:00 – 16:00 JST
Affected Cluster:
IZ1-01
Work:
Network equipment maintenance.
Impact:
Connectivity between IZ1-01 and external networks will be interrupted multiple times during the maintenance window. The timing and duration of each interruption may vary depending on the progress of the work.
While connectivity is interrupted:
- IZ1-01 cluster will be inaccessible through the Internet or other external networks.
- The Kubernetes API will be unavailable.
- Services exposed through Ingress or IAP will be unavailable.
- Cluster-related services, such as Prometheus and Headlamp, will be unavailable.
- Running workloads will be unable to communicate with the Internet or other external networks.
Monitoring, log collection, and alerts may have gaps or delays.
Other clusters are not affected.
Additional source IP address for Internet-bound traffic:
As part of the external connectivity redundancy work, an additional source IP address will be added for Internet-bound traffic from IZ1-01. If you have registered source IP addresses in an external service’s allow list, please allow both the existing and additional IP addresses by September 28, 2026.
The additional IP address is expected to be finalized by around September 14, 2026. It will be added to the Site and Compute Node Specifications and to this notice.
Update (September 14, 2026)
The additional IP address has been finalized.
| Source IP address | |
|---|---|
| Existing | 162.43.139.87/32 |
| Additional | 162.43.139.99/32 |
The same information is also published in the Site and Compute Node Specifications.
For our maintenance policy, see the User Guide.