Maintenance Ceph storage cluster

Maintenance Ceph storage cluster

05-04-2022 00:00:00 - 08-04-2022 07:00:00

Urgency: Planned
Time window:
05/04/2022 00:00 hrs - 07:00 hrs
05/04/2022 08:30 hrs - 17:30 hrs
06/04/2022 08:30 hrs - 17:30 hrs
07/04/2022 08:30 hrs - 17:30 hrs
08/04/2022 00:00 hrs - 07:00 hrs
Affected services:
- Virtual machines
- Shared storage
- Shared hosting
- MSSQL instances
Expected impact:
- Reduced redundancy
- Shared file system (CephFS) unavailable for a short time (possibly several times)
Customer intervention required: No
Reference number: 179099

Summary:

From Tuesday 5 April 0:00 to Friday 8 April 7:00 BIT engineers will perform maintenance on the Ceph storage cluster in the time windows specified above. During all maintenance windows the cluster will be less redundant. The shared filesystem (CephFS) will only be briefly unavailable during the time window on 8 April.

Details:

The Ceph cluster will get a software upgrade. The maintenance is not expected to have a noticeable impact on the operation of the cluster, with the exception of the shared file system service (CephFS). CephFS will be unavailable for a short period of time, possibly several times. The cluster will be upgraded node by node. A fully healthy cluster (Ceph HEALTH_OK) is waited for before the next node is upgraded. The cluster is designed so that maintenance on most components can be performed without affecting services. These parts of the cluster are therefore upgraded during the day. For those components where it is estimated that there is an increased risk of impact, or where it is certain that there will be impact in terms of availability, the maintenance will take place at night.