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The share node can support two modes, with and without the handling of share servers. The mode depends on driver support.
Option 1
Deploying the service without driver support for share management. In
this mode, the service does not do anything related to networking. The
operator must ensure network connectivity between instances and the NFS
server. This tutorial demonstrates setting up the LVM driver to support
this driver mode. It requires LVM and NFS packages as well as an
additional disk for the manila-share LVM volume group. This
driver mode may be referred to as
driver_handles_share_servers = False mode, or simply
DHSS=False mode.
Option 2
Deploying the service with driver support for share management. In
this mode, the service runs with a back end driver that creates and
manages share servers. This tutorial demonstrates setting up the Generic
driver. This driver requires Compute (nova), Networking (neutron) and
Block storage (cinder) services for managing share servers. The
information used for creating share servers is configured with the help
of share networks. This option uses the generic driver with the handling
of share servers capacity and requires attaching the
selfservice network to a router. This driver mode may be
referred to as driver_handles_share_servers = True mode, or
simply DHSS=True mode.
Warning
When running the generic driver in DHSS=True driver
mode, the share service should be run on the same node as the networking
service. However, such a service may not be able to run the LVM driver
that runs in DHSS=False driver mode effectively, due to a
bug in some distributions of Linux. For more information, see LVM Driver
section in the Configuration
Reference Guide.