Management cluster storage

The management cluster requires minimum three storage devices per node. Each device is used for different type of storage:

  • One storage device for boot partitions and root file system. SSD is recommended. A RAID device is not supported.

  • One storage device per server is reserved for local persistent volumes. These volumes are served by the Local Storage Static Provisioner, that is local-volume-provisioner, and used by many services of Mirantis Container Cloud.

  • At least one disk per server must be configured as a device managed by a Ceph OSD.

  • The minimal recommended number of Ceph OSDs for management cluster is 2 OSDs per node, to the total of 6 OSDs.

  • The recommended replication factor is 3, which ensures that no data is lost if any single node of the management cluster fails.

You can configure host storage devices using BareMetalHostProfile resources.