systemd-storagetm.service(8) — Linux manual page


SYSTEMD-S....SERVICE(8) systemd-storagetm.serviceSYSTEMD-S....SERVICE(8)

NAME         top

       systemd-storagetm.service, systemd-storagetm - Exposes all local
       block devices as NVMe-TCP mass storage devices

SYNOPSIS         top


       /usr/lib/systemd/systemd-storagetm [OPTIONS...] [DEVICE]

DESCRIPTION         top

       systemd-storagetm.service is a service that exposes all local
       block devices as NVMe-TCP mass storage devices. Its primary
       use-case is to be invoked by the unit
       that can be booted into.

       Warning: the NVMe disks are currently exposed without
       authentication or encryption, in read/write mode. This means
       network peers may read from and write to the device without any
       restrictions. This functionality should hence only be used in a
       local setup.

       Note that to function properly networking must be configured too.
       The recommended mechanism to boot into a storage target mode is
       by adding "
       ip=link-local" on the kernel command line. Note that
       "ip=link-local" only configures link-local IP, i.e. IPv4LL and
       IPv6LL, which means non-routable addresses. This is done for
       security reasons, so that only systems on the local link can
       access the devices. Use "ip=dhcp" to assign routable addresses
       too. For further details see

       Unless the --all switch is used expects one or more block devices
       or regular files to expose via NVMe-TCP as argument.

OPTIONS         top

       The following options are understood:

           Takes a string. If specified configures the NVMe Qualified
           Name to use for the exposed NVMe-TCP mass storage devices.
           The NQN should follow the syntax described in NVM Express
           Base Specification 2.0c[1], section 4.5 "NVMe Qualified
           Names". Note that the NQN specified here will be suffixed
           with a dot and the the block device name before it is exposed
           on the NVMe target. If not specified defaults to
           "", where ID is replaced
           by a 128bit ID derived from machine-id(5).

           Added in version 255.

       --all, -a
           If specified exposes all local block devices via NVMe-TCP,
           current and future (i.e. it watches block devices come and go
           and updates the NVMe-TCP list as needed). Note that by
           default any block devices that originate on the same block
           device as the block device backing the current root file
           system are excluded. If the switch is specified twice this
           safety mechanism is disabled.

           Added in version 255.

       -h, --help
           Print a short help text and exit.

           Print a short version string and exit.

SEE ALSO         top

       systemd(1), systemd.special(7)

NOTES         top

        1. NVM Express Base Specification 2.0c

COLOPHON         top

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systemd 255                                      SYSTEMD-S....SERVICE(8)

Pages that refer to this page: systemd.directives(7)systemd.index(7)systemd.special(7)