Cluster

A storage cluster is described by its StorageCluster resource and operated through StorageClusterOps resources. Each StorageClusterOps names the cluster, carries one action, and is driven to completion by the Simplyblock Operator, which reports the progress in the status of the operation. The topology settings of a cluster, its failure domains and its node affinity, are properties of the StorageCluster itself and are read when data placement is decided.

The operation pattern that every Ops kind shares is described in Operations.

Topics

Topic	Purpose
Storage Cluster Actions	The StorageClusterOps kind: its actions, parameters, steps, and tracking.
Activating a Storage Cluster	Making a cluster serve I/O, and the gates an activation waits on.
Shutting Down a Storage Cluster	Suspending the whole cluster and taking all of its volumes offline.
Starting a Storage Cluster	Bringing a suspended cluster back into service.
Restarting a Storage Cluster	Sequencing a shutdown and a start in one operation.
Rolling Restart	Restarting every storage node of a cluster, one node at a time.
Upgrading a Cluster	Upgrading the operator, the control plane, and the storage plane.
Managing Failure Domains	Grouping storage nodes into fault groups, so that chunks are spread across them.
Configuring Node Affinity	Keeping the data of a logical volume on the storage node that owns it.