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SYSTEMD-CRYPTSETUP-GENERATOR(8) systemd-cryptsetup-generator SYSTEMD-CRYPTSETUP-GENERATOR(8)
NAME
systemd-cryptsetup-generator - Unit generator for /etc/crypttab
SYNOPSIS
/usr/lib/systemd/system-generators/systemd-cryptsetup-generator
DESCRIPTION
systemd-cryptsetup-generator is a generator that translates /etc/crypttab into native
systemd units early at boot and when configuration of the system manager is reloaded. This
will create systemd-cryptsetup@.service(8) units as necessary.
systemd-cryptsetup-generator implements systemd.generator(7).
KERNEL COMMAND LINE
systemd-cryptsetup-generator understands the following kernel command line parameters:
luks=, rd.luks=
Takes a boolean argument. Defaults to "yes". If "no", disables the generator entirely.
rd.luks= is honored only by initial RAM disk (initrd) while luks= is honored by both
the main system and the initrd.
luks.crypttab=, rd.luks.crypttab=
Takes a boolean argument. Defaults to "yes". If "no", causes the generator to ignore
any devices configured in /etc/crypttab (luks.uuid= will still work however).
rd.luks.crypttab= is honored only by initial RAM disk (initrd) while luks.crypttab= is
honored by both the main system and the initrd.
luks.uuid=, rd.luks.uuid=
Takes a LUKS superblock UUID as argument. This will activate the specified device as
part of the boot process as if it was listed in /etc/crypttab. This option may be
specified more than once in order to set up multiple devices. rd.luks.uuid= is
honored only by initial RAM disk (initrd) while luks.uuid= is honored by both the main
system and the initrd.
If /etc/crypttab contains entries with the same UUID, then the name, keyfile and
options specified there will be used. Otherwise the device will have the name
"luks-UUID".
If /etc/crypttab exists, only those UUIDs specified on the kernel command line will be
activated in the initrd or the real root.
luks.name=, rd.luks.name=
Takes a LUKS super block UUID followed by an "=" and a name. This implies
rd.luks.uuid= or luks.uuid= and will additionally make the LUKS device given by the
UUID appear under the provided name.
rd.luks.name= is honored only by initial RAM disk (initrd) while luks.name= is honored
by both the main system and the initrd.
luks.options=, rd.luks.options=
Takes a LUKS super block UUID followed by an "=" and a string of options separated by
commas as argument. This will override the options for the given UUID.
If only a list of options, without an UUID, is specified, they apply to any UUIDs not
specified elsewhere, and without an entry in /etc/crypttab.
rd.luks.options= is honored only by initial RAM disk (initrd) while luks.options= is
honored by both the main system and the initrd.
luks.key=, rd.luks.key=
Takes a password file name as argument or a LUKS super block UUID followed by a "="
and a password file name.
For those entries specified with rd.luks.uuid= or luks.uuid=, the password file will
be set to the one specified by rd.luks.key= or luks.key= of the corresponding UUID, or
the password file that was specified without a UUID.
It is also possible to specify an external device which should be mounted before we
attempt to unlock the LUKS device. systemd-cryptsetup will use password file stored on
that device. Device containing password file is specified by appending colon and a
device identifier to the password file path. For example,
rd.luks.uuid=b40f1abf-2a53-400a-889a-2eccc27eaa40
rd.luks.key=b40f1abf-2a53-400a-889a-2eccc27eaa40=/keyfile:LABEL=keydev. Hence, in this
case, we will attempt to mount file system residing on the block device with label
"keydev". This syntax is for now only supported on a per-device basis, i.e. you have
to specify LUKS device UUID.
rd.luks.key= is honored only by initial RAM disk (initrd) while luks.key= is honored
by both the main system and the initrd.
SEE ALSO
systemd(1), crypttab(5), systemd-cryptsetup@.service(8), cryptsetup(8), systemd-fstab-
generator(8)
systemd 219 SYSTEMD-CRYPTSETUP-GENERATOR(8)
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Under GNU General Public License
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