Storage cluster creation
The Fusion Data Foundation operators themselves provide no storage functionality, and the desired storage configuration must be defined.
After you install the operators, create a new StorageCluster, using either the
Fusion Data Foundation console wizard or the CLI and the
ocs-operator reconciles this StorageCluster. Fusion Data Foundation supports a single
StorageCluster per installation. Any StorageCluster CRs created
after the first one is ignored by ocs-operator reconciliation.
Fusion Data Foundation allows the following StorageCluster configurations:
- Internal
- In the Internal mode, all the components run containerized within the Fusion Data Foundation cluster and uses dynamically provisioned
persistent volumes (PVs) created against the
StorageClassspecified by the administrator in the installation wizard. - Internal-attached
- This mode is similar to the Internal mode but the administrator is required to define the local
storage devices directly attached to the cluster nodes that the Ceph uses for its backing storage.
Also, the administrator need to create the CRs that the local storage operator reconciles to provide
the
StorageClass. Theocs-operatoruses thisStorageClassas the backing storage for Ceph. - External
- In this mode, Ceph components do not run inside the Fusion Data Foundation cluster instead connectivity is provided to an external Fusion Data Foundation installation for which the applications can create PVs. The other components run within the cluster as required.
- MCG Standalone
- This mode facilitates the installation of a Multicloud Object Gateway system without an accompanying CephCluster.
After a StorageCluster CR is found, ocs-operator validates it
and begins to create subsequent resources to define the storage components.