lvm2/doc/example.conf

# This is an example configuration file for the LVM2 system.
# It contains the default settings that would be used if there was no
# /etc/lvm/lvm.conf file.
#
# Refer to 'man lvm.conf' for further information including the file layout.
#
# To put this file in a different directory and override /etc/lvm set
# the environment variable LVM_SYSTEM_DIR before running the tools.


# This section allows you to configure which block devices should
# be used by the LVM system.
devices {

    # Where do you want your volume groups to appear ?
    dir = "/dev"

    # An array of directories that contain the device nodes you wish
    # to use with LVM2.
    scan = [ "/dev" ]

    # A filter that tells LVM2 to only use a restricted set of devices.
    # The filter consists of an array of regular expressions.  These
    # expressions can be delimited by a character of your choice, and
    # prefixed with either an 'a' (for accept) or 'r' (for reject).

    # Remember to run vgscan after you change this parameter.

    # By default we accept every block device:
    filter = [ "a/.*/" ]

    # Exclude the cdrom drive
    # filter = [ "r|/dev/cdrom|" ]

    # When testing I like to work with just loopback devices:
    # filter = [ "a/loop/", "r/.*/" ]

    # Or maybe all loops and ide drives except hdc:
    # filter =[ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]

    # Use anchors if you want to be really specific
    # filter = [ "a|^/dev/hda8$|", "r/.*/" ]

    # The results of the filtering are cached on disk to avoid
    # rescanning dud devices (which can take a very long time).  By
    # default this cache file is hidden in the /etc/lvm directory.
    # It is safe to delete this file. vgscan regenerates it.
    cache = "/etc/lvm/.cache"

    # You can turn off writing this cache file by setting this to 0.
    write_cache_state = 1

    # An advanced setting.
    # List of pairs of additional acceptable block device types found 
    # in /proc/devices with maximum (non-zero) number of partitions.
    # types = [ "fd", 16 ]
}

# This section that allows you to configure the nature of the
# information that LVM2 reports.
log {

    # Controls the messages sent to stdout or stderr.
    # There are three levels of verbosity, 3 being the most verbose.
    verbose = 0

    # Should we send log messages through syslog?
    # 1 is yes; 0 is no.
    syslog = 1

    # Should we log error and debug messages to a file?
    # By default there is no log file.
    #file = "/var/log/lvm2.log"

    # Should we overwrite the log file each time the program is run?
    # By default we append.
    overwrite = 0

    # What level of log messages should we send to the log file and/or syslog?
    # There are 6 syslog-like log levels currently in use - 2 to 7 inclusive.
    # 7 is the most verbose (LOG_DEBUG).
    level = 0
    
    # Format of output messages
    # Whether or not (1 or 0) to indent messages according to their severity
    indent = 1

    # Whether or not (1 or 0) to display the command name on each line output
    command_names = 0

    # A prefix to use before the message text (but after the command name,
    # if selected).  Default is two spaces, so you can see/grep the severity
    # of each message.
    prefix = "  "

    # To make the messages look similar to the original LVM tools use:
    #   indent = 0
    #   command_names = 1
    #   prefix = " -- "
}

# Configuration of metadata backups and archiving.  In LVM2 when we
# talk about a 'backup' we mean making a copy of the metadata for the
# *current* system.  The 'archive' contains old metadata configurations.
# Backups are stored in a human readeable text format.
backup {

    # Should we maintain a backup of the current metadata configuration ?
    # Use 1 for Yes; 0 for No.
    # Think very hard before turning this off!
    backup = 1

    # Where shall we keep it ?
    # Remember to back up this directory regularly!
    backup_dir = "/etc/lvm/backup"

    # Should we maintain an archive of old metadata configurations.
    # Use 1 for Yes; 0 for No.
    # On by default.  Think very hard before turning this off.
    archive = 1

    # Where should archived files go ?
    # Remember to back up this directory regularly!
    archive_dir = "/etc/lvm/archive"
    
    # What is the minimum number of archive files you wish to keep ?
    retain_min = 10

    # What is the minimum time you wish to keep an archive file for ?
    retain_days = 30
}

# Settings for the running LVM2 in shell (readline) mode.
shell {

    # Number of lines of history to store in ~/.lvm_history
    history_size = 100
}


# Miscellaneous global LVM2 settings
global {
    
    # The file creation mask for any files and directories created.
    # Interpreted as octal if the first digit is zero.
    umask = 077

    # Allow other users to read the files
    #umask = 022

    # Enabling test mode means that no changes to the on disk metadata
    # will be made.  Equivalent to having the -t option on every
    # command.  Defaults to off.
    test = 0

    # Whether or not to communicate with the kernel device-mapper.
    # Set to 0 if you want to use the tools to manipulate LVM metadata 
    # without activating any logical volumes.
    # If the device-mapper kernel driver is not present in your kernel
    # setting this to 0 should suppress the error messages.
    activation = 1

    # The default metadata format that commands should use - "lvm1" or "lvm2".
    # The command line override is -M1 or -M2.
    # Defaults to "lvm1" if compiled in, else "lvm2".
    # format = "lvm1"

    # Location of proc filesystem
    proc = "/proc"

    # Type of locking to use. Defaults to file-based locking (1).
    # Turn locking off by setting to 0 (dangerous: risks metadata corruption
    # if LVM2 commands get run concurrently).
    locking_type = 1

    # Local non-LV directory that holds file-based locks while commands are
    # in progress.  A directory like /tmp that may get wiped on reboot is OK.
    locking_dir = "/var/lock/lvm"

    # Other entries can go here to allow you to load shared libraries
    # e.g. if support for LVM1 metadata was compiled as a shared library use
    #   format_libraries = "liblvm2format1.so" 
    # Full pathnames can be given.

    # Search this directory first for shared libraries.
    #   library_dir = "/lib"
}


####################
# Advanced section #
####################

# Metadata settings
#
# metadata {
    # Default number of copies of metadata to hold on each PV.  0, 1 or 2.
    # It's best to leave this at 2.
    # You might want to override it from the command line with 0 or 1 
    # when running pvcreate on new PVs which are to be added to large VGs.

    # pvmetadatacopies = 2

    # Approximate default size of on-disk metadata areas in sectors.
    # You should increase this if you have large volume groups or
    # you want to retain a large on-disk history of your metadata changes.

    # pvmetadatasize = 255

    # List of directories holding live copies of text format metadata.
    # These directories must not be on logical volumes!
    # It's possible to use LVM2 with a couple of directories here,
    # preferably on different (non-LV) filesystems, and with no other 
    # on-disk metadata (pvmetadatacopies = 0). Or this can be in
    # addition to on-disk metadata areas.
    # The feature was originally added to simplify testing.
    #
    # Never edit any files in these directories by hand unless you
    # you are absolutely sure you know what you are doing! Use
    # the supplied toolset to make changes (e.g. vgcfgrestore).

    # dirs = [ "/etc/lvm/metadata", "/mnt/disk2/lvm/metadata2" ]
#}