BackupConfigurationEqual check whether two BackupConfigurations has same specification.

CreateBatchPVC creates a batch of PVCs whose definitions has been provided in pvcList argument.

EnsureDefaultFunctions creates "update-status", "pvc-backup" and "pvc-restore" Functions if they are not already present.

EnsureDefaultTasks creates "pvc-backup" and "pvc-restore" Tasks if they are not already present.

TODO: move to store.

GetHostName returns hostname for a target.

PVCListToVolumes return a list of volumes to mount in pod for a list of PVCs.

return the matching rule if targetHosts is empty for a rule, it will match any hostname.

RestoreSessionEqual check whether two RestoreSessions has same specification.

UpsertInterimVolume create a PVC according to InterimVolumeTemplate and attach it to the respective pod.

UpsertPodSecurityContext update current SecurityContext with new SecurityContext.

UpsertSecurityContext update current SecurityContext with new SecurityContext.

options that don't come from repository, backup-config, backup-session, restore-session.