Chapter 26. Device Mapper Multipathing (DM Multipath) and Storage for Virtual Machines
Chapter 26. Device Mapper Multipathing (DM Multipath) and Storage for Virtual Machines Red Hat Enterprise Linux 7 supports DM Multipath and storage for virtual machines . 26.1. Storage for Virtual Machines Red Hat Enterprise Linux 7 supports the following file systems or online storage methods for virtual storage: Fibre Channel iSCSI NFS GFS2 Virtualization in Red Hat Enterprise Linux 7 uses libvirt to manage virtual instances. The libvirt utility uses the concept of storage pools to manage storage for virtualized guests. A storage pool is a storage that can be divided into smaller volumes or allocated directly to a guest. Volumes of a storage pool can be allocated to virtualized guests. Following are the categories of available storage pools: Local storage pools Local storage includes storage devices, files or directories directly attached to a host, local directories, directly attached disks, and LVM Volume Groups. Networked (shared) storage pools Networked storage covers storage devices shared over a network using standard protocols. It includes shared storage devices using Fibre Channel, iSCSI, NFS, GFS2, and SCSI RDMA protocols, and is a requirement for migrating virtualized guests between hosts. For more information on types of storage pool supported by Red Hat Enterprise Linux, see the Red Hat Virtualization Deployment and Administration Guide .