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NAME | SYNOPSIS | DESCRIPTION | SYNTAX | SETTINGS | FILES | SEE ALSO | COLOPHON |
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LVM.CONF(5) File Formats Manual LVM.CONF(5)
lvm.conf — Configuration file for LVM2
/etc/lvm/lvm.conf
lvm.conf is loaded during the initialisation phase of lvm(8).
This file can in turn lead to other files being loaded - settings
read in later override earlier settings. File timestamps are
checked between commands and if any have changed, all the files
are reloaded.
For a description of each lvm.conf(5) setting, run:
lvmconfig --typeconfig default --withcomments --withspaces
The settings defined in lvm.conf can be overridden by any of
these extended configuration methods:
direct config override on command line
The --config ConfigurationString command line option takes
the ConfigurationString as direct string representation of
the configuration to override the existing configuration.
The ConfigurationString is of exactly the same format as
used in any LVM configuration file.
profile config
A profile is a set of selected customizable configuration
settings that are aimed to achieve a certain
characteristics in various environments or uses. It's used
to override existing configuration. Normally, the name of
the profile should reflect that environment or use.
There are two groups of profiles recognised: command profiles and
metadata profiles.
The command profile is used to override selected configuration
settings at global LVM command level - it is applied at the very
beginning of LVM command execution and it is used throughout the
whole time of LVM command execution. The command profile is
applied by using the --commandprofile ProfileName command line
option that is recognised by all LVM2 commands.
The metadata profile is used to override selected configuration
settings at Volume Group/Logical Volume level - it is applied
independently for each Volume Group/Logical Volume that is being
processed. As such, each Volume Group/Logical Volume can store
the profile name used in its metadata so next time the Volume
Group/Logical Volume is processed, the profile is applied
automatically. If Volume Group and any of its Logical Volumes
have different profiles defined, the profile defined for the
Logical Volume is preferred. The metadata profile can be
attached/detached by using the lvchange and vgchange commands and
their --metadataprofile ProfileName and --detachprofile options
or the --metadataprofile option during creation when using
vgcreate or lvcreate command. The vgs and lvs reporting commands
provide -o vg_profile and -o lv_profile output options to show
the metadata profile currently attached to a Volume Group or a
Logical Volume.
The set of options allowed for command profiles is mutually
exclusive when compared to the set of options allowed for
metadata profiles. The settings that belong to either of these
two sets can't be mixed together and LVM tools will reject such
profiles.
LVM itself provides a few predefined configuration profiles.
Users are allowed to add more profiles with different values if
needed. For this purpose, there's the
command_profile_template.profile (for command profiles) and
metadata_profile_template.profile (for metadata profiles) which
contain all settings that are customizable by profiles of certain
type. Users are encouraged to copy these template profiles and
edit them as needed. Alternatively, the lvmconfig --file
<ProfileName.profile> --type profilable-command <section> or
lvmconfig --file <ProfileName.profile> --type profilable-metadata
<section> can be used to generate a configuration with profilable
settings in either of the type for given section and save it to
new ProfileName.profile (if the section is not specified, all
profilable settings are reported).
The profiles are stored in /etc/lvm/profile directory by default.
This location can be changed by using the config/profile_dir
setting. Each profile configuration is stored in
ProfileName.profile file in the profile directory. When
referencing the profile, the .profile suffix is left out.
tag config
See tags configuration setting description below.
When several configuration methods are used at the same time and
when LVM looks for the value of a particular setting, it
traverses this config cascade from left to right:
direct config override on command line → command profile config →
metadata profile config → tag config → lvmlocal.conf → lvm.conf
No part of this cascade is compulsory. If there's no setting
value found at the end of the cascade, a default value is used
for that setting. Use lvmconfig to check what settings are in
use and what the default values are.
This section describes the configuration file syntax.
Whitespace is not significant unless it is within quotes. This
provides a wide choice of acceptable indentation styles.
Comments begin with # and continue to the end of the line. They
are treated as whitespace.
Here is an informal grammar:
file = value*
A configuration file consists of a set of values.
value = section | assignment
A value can either be a new section, or an assignment.
section = identifier '{' value* '}'
A section groups associated values together. If the same
section is encountered multiple times, the contents of all
instances are concatenated together in the order of
appearance.
It is denoted by a name and delimited by curly brackets.
e.g. backup {
...
}
assignment = identifier '=' ( array | type )
An assignment associates a type with an identifier. If the
identifier contains forward slashes, those are interpreted
as path delimiters. The statement section/key = value is
equivalent to section { key = value }. If multiple
instances of the same key are encountered, only the last
value is used (and a warning is issued).
e.g. level = 7
array = '[' ( type ',')* type ']' | '[' ']'
Inhomogeneous arrays are supported.
Elements must be separated by commas.
An empty array is acceptable.
An array with one element will be correctly interpreted if
the array brackets are missing.
type = integer|float|string
integer = [0-9]*
float = [0-9]*'.'[0-9]*
string = '"' .* '"'
Strings with spaces must be enclosed in double quotes,
single words that start with a letter can be left
unquoted.
The lvmconfig command prints the LVM configuration settings in
various ways. See the man page lvmconfig(8).
Command to print a list of all possible config settings, with
their default values:
lvmconfig --type default
Command to print a list of all possible config settings, with
their default values, and a full description of each as a
comment:
lvmconfig --type default --withcomments
Command to print a list of all possible config settings, with
their current values (configured, non-default values are shown):
lvmconfig --type current
Command to print all config settings that have been configured
with a different value than the default (configured, non-default
values are shown):
lvmconfig --type diff
Command to print a single config setting, with its default value,
and a full description, where "Section" refers to the config
section, e.g. global, and "Setting" refers to the name of the
specific setting, e.g. umask:
lvmconfig --type default --withcomments Section/Setting
/etc/lvm/lvm.conf
/etc/lvm/lvmlocal.conf
/etc/lvm/archive
/etc/lvm/backup
/etc/lvm/cache/.cache
/etc/lvm/profile
/run/lock/lvm
lvm(8), lvmconfig(8)
This page is part of the lvm2 (Logical Volume Manager 2) project.
Information about the project can be found at
⟨http://www.sourceware.org/lvm2/⟩. If you have a bug report for
this manual page, see ⟨https://github.com/lvmteam/lvm2/issues⟩.
This page was obtained from the project's upstream Git repository
⟨git://sourceware.org/git/lvm2.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Red Hat, Inc. LVM TOOLS 2.03.25(2)-git (2024-05-16) LVM.CONF(5)
Pages that refer to this page: lvm.conf(5), lvmcache(7), lvmraid(7), lvmsystemid(7), lvmthin(7), lvmvdo(7), dmeventd(8), fsadm(8), lvchange(8), lvconvert(8), lvcreate(8), lvdisplay(8), lvextend(8), lvm(8), lvmconfig(8), lvmdevices(8), lvmdiskscan(8), lvm-fullreport(8), lvm_import_vdo(8), lvm-lvpoll(8), lvmpolld(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8), pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgconvert(8), vgcreate(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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