Bug#939092: lvm2: Spurious(?) failure of lvm2-pvscan systemd unit

Nikolaus Rath Sun, 01 Sep 2019 02:03:42 -0700

Package: lvm2
Version: 2.03.02-3
Severity: normal

After upgrading to buster, I noticed that, according to `systemctl
status` my system is always in degraded mode:

# systemctl status | head
● vostro.rath.org
State: degraded
Jobs: 0 queued
Failed: 1 units
Since: Sun 2019-09-01 09:49:57 BST; 5min ago
CGroup: /

It turns out that this is because of:

# systemctl | grep lvm2
lvm2-monitor.service loaded active exited Monitoring of LVM2
mirrors, snapshots etc. using dmeventd or progress polling
● lvm2-pvscan@253:0.service loaded failed failed LVM event activation
on device 253:0
lvm2-pvscan@253:6.service loaded active exited LVM event activation
on device 253:6
system-lvm2\x2dpvscan.slice loaded active active
system-lvm2\x2dpvscan.slice
lvm2-lvmpolld.socket loaded active listening LVM2 poll daemon
socket

# systemctl status lvm2-pvscan@253:0.service | cat
● lvm2-pvscan@253:0.service - LVM event activation on device 253:0
Loaded: loaded (/lib/systemd/system/lvm2-pvscan@.service; static; vendor
preset: enabled)
Active: failed (Result: exit-code) since Sun 2019-09-01 09:49:58 BST; 6min
ago
Docs: man:pvscan(8)
Process: 738 ExecStart=/sbin/lvm pvscan --cache --activate ay 253:0
(code=exited, status=5)
Main PID: 738 (code=exited, status=5)

Sep 01 09:49:59 vostro.rath.org lvm[738]: /dev/sde: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[738]: /dev/sdf: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[738]: /dev/sdg: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[738]: Cannot change VG vg0 while PVs are
missing.
Sep 01 09:49:59 vostro.rath.org lvm[738]: Consider vgreduce --removemissing.
Sep 01 09:49:59 vostro.rath.org lvm[738]: Cannot process volume group vg0
Sep 01 09:49:58 vostro.rath.org systemd[1]: Starting LVM event activation on
device 253:0...
Sep 01 09:49:58 vostro.rath.org systemd[1]: lvm2-pvscan@253:0.service: Main
process exited, code=exited, status=5/NOTINSTALLED
Sep 01 09:49:58 vostro.rath.org systemd[1]: lvm2-pvscan@253:0.service: Failed
with result 'exit-code'.
Sep 01 09:49:58 vostro.rath.org systemd[1]: Failed to start LVM event
activation on device 253:0.

I do not think there is an actual problem here, because vg0 is running
correctly - presumably as a result of the second pvscan unit:

# systemctl status lvm2-pvscan@253:6.service
● lvm2-pvscan@253:6.service - LVM event activation on device 253:6
Loaded: loaded (/lib/systemd/system/lvm2-pvscan@.service; static; vendor
preset: enabled)
Active: active (exited) since Sun 2019-09-01 09:49:59 BST; 7min ago
Docs: man:pvscan(8)
Process: 863 ExecStart=/sbin/lvm pvscan --cache --activate ay 253:6
(code=exited, status=0/S
Main PID: 863 (code=exited, status=0/SUCCESS)

Sep 01 09:49:59 vostro.rath.org lvm[863]: /dev/sdd: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[863]: /dev/sde: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[863]: /dev/sdf: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[863]: /dev/sdg: open failed: No medium
found
Sep 01 09:49:59 vostro.rath.org lvm[863]: 6 logical volume(s) in volume group
"vg0" now acti
Sep 01 09:49:58 vostro.rath.org systemd[1]: Starting LVM event activation on
device 253:6...
Sep 01 09:49:59 vostro.rath.org systemd[1]: Started LVM event activation on
device 253:6.

It would be very nice to not have the system always report to be in
degraded mode though. Do you have any idea what might be happening here?

-- System Information:
Debian Release: 10.0
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-5-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lvm2 depends on:
ii dmeventd 2:1.02.155-3
ii dmsetup 2:1.02.155-3
ii libaio1 0.3.112-3
ii libblkid1 2.33.1-0.1
ii libc6 2.28-10
ii libdevmapper-event1.02.1 2:1.02.155-3
ii libdevmapper1.02.1 2:1.02.155-3
ii libreadline5 5.2+dfsg-3+b13
ii libselinux1 2.8-1+b1
ii libsystemd0 241-5
ii libudev1 241-5
ii lsb-base 10.2019051400

Versions of packages lvm2 recommends:
pn thin-provisioning-tools <none>

lvm2 suggests no packages.

-- Configuration Files:
/etc/lvm/lvm.conf changed:
config {
# Configuration option config/checks.
# If enabled, any LVM configuration mismatch is reported.
# This implies checking that the configuration key is understood by
# LVM and that the value of the key is the proper type. If disabled,
# any configuration mismatch is ignored and the default value is used
# without any warning (a message about the configuration key not being
# found is issued in verbose mode only).
checks = 1
# Configuration option config/abort_on_errors.
# Abort the LVM process if a configuration mismatch is found.
abort_on_errors = 0
# Configuration option config/profile_dir.
# Directory where LVM looks for configuration profiles.
profile_dir = "/etc/lvm/profile"
}
devices {
# Configuration option devices/dir.
# Directory in which to create volume group device nodes.
# Commands also accept this as a prefix on volume group names.
# This configuration option is advanced.
dir = "/dev"
# Configuration option devices/scan.
# Directories containing device nodes to use with LVM.
# This configuration option is advanced.
scan = [ "/dev" ]
# Configuration option devices/obtain_device_list_from_udev.
# Obtain the list of available devices from udev.
# This avoids opening or using any inapplicable non-block devices or
# subdirectories found in the udev directory. Any device node or
# symlink not managed by udev in the udev directory is ignored. This
# setting applies only to the udev-managed device directory; other
# directories will be scanned fully. LVM needs to be compiled with
# udev support for this setting to apply.
obtain_device_list_from_udev = 1
# Configuration option devices/external_device_info_source.
# Select an external device information source.
# Some information may already be available in the system and LVM can
# use this information to determine the exact type or use of devices it
# processes. Using an existing external device information source can
# speed up device processing as LVM does not need to run its own native
# routines to acquire this information. For example, this information
# is used to drive LVM filtering like MD component detection, multipath
# component detection, partition detection and others.
#
# Accepted values:
# none
# No external device information source is used.
# udev
# Reuse existing udev database records. Applicable only if LVM is
# compiled with udev support.
#
external_device_info_source = "none"
# Configuration option devices/preferred_names.
# Select which path name to display for a block device.
# If multiple path names exist for a block device, and LVM needs to
# display a name for the device, the path names are matched against
# each item in this list of regular expressions. The first match is
# used. Try to avoid using undescriptive /dev/dm-N names, if present.
# If no preferred name matches, or if preferred_names are not defined,
# the following built-in preferences are applied in order until one
# produces a preferred name:
# Prefer names with path prefixes in the order of:
# /dev/mapper, /dev/disk, /dev/dm-*, /dev/block.
# Prefer the name with the least number of slashes.
# Prefer a name that is a symlink.
# Prefer the path with least value in lexicographical order.
#
# Example
# preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath",
"^/dev/[hs]d" ]
#
# This configuration option does not have a default value defined.
# Configuration option devices/filter.
# Limit the block devices that are used by LVM commands.
# This is a list of regular expressions used to accept or reject block
# device path names. Each regex is delimited by a vertical bar '|'
# (or any character) and is preceded by 'a' to accept the path, or
# by 'r' to reject the path. The first regex in the list to match the
# path is used, producing the 'a' or 'r' result for the device.
# When multiple path names exist for a block device, if any path name
# matches an 'a' pattern before an 'r' pattern, then the device is
# accepted. If all the path names match an 'r' pattern first, then the
# device is rejected. Unmatching path names do not affect the accept
# or reject decision. If no path names for a device match a pattern,
# then the device is accepted. Be careful mixing 'a' and 'r' patterns,
# as the combination might produce unexpected results (test changes.)
# Run vgscan after changing the filter to regenerate the cache.
#
# Example
# Accept every block device:
# filter = [ "a|.*/|" ]
# Reject the cdrom drive:
# filter = [ "r|/dev/cdrom|" ]
# Work with just loopback devices, e.g. for testing:
# filter = [ "a|loop|", "r|.*|" ]
# Accept all loop devices and ide drives except hdc:
# filter = [ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]
# Use anchors to be very specific:
# filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
#
# This configuration option has an automatic default value.
# filter = [ "a|.*/|" ]
# Configuration option devices/global_filter.
# Limit the block devices that are used by LVM system components.
# Because devices/filter may be overridden from the command line, it is
# not suitable for system-wide device filtering, e.g. udev.
# Use global_filter to hide devices from these LVM system components.
# The syntax is the same as devices/filter. Devices rejected by
# global_filter are not opened by LVM.
# This configuration option has an automatic default value.
# global_filter = [ "a|.*/|" ]
# Configuration option devices/types.
# List of additional acceptable block device types.
# These are of device type names from /proc/devices, followed by the
# maximum number of partitions.
#
# Example
# types = [ "fd", 16 ]
#
# This configuration option is advanced.
# This configuration option does not have a default value defined.
# Configuration option devices/sysfs_scan.
# Restrict device scanning to block devices appearing in sysfs.
# This is a quick way of filtering out block devices that are not
# present on the system. sysfs must be part of the kernel and mounted.)
sysfs_scan = 1
# Configuration option devices/scan_lvs.
# Scan LVM LVs for layered PVs.
scan_lvs = 1
# Configuration option devices/multipath_component_detection.
# Ignore devices that are components of DM multipath devices.
multipath_component_detection = 1
# Configuration option devices/md_component_detection.
# Ignore devices that are components of software RAID (md) devices.
md_component_detection = 1
# Configuration option devices/fw_raid_component_detection.
# Ignore devices that are components of firmware RAID devices.
# LVM must use an external_device_info_source other than none for this
# detection to execute.
fw_raid_component_detection = 0
# Configuration option devices/md_chunk_alignment.
# Align the start of a PV data area with md device's stripe-width.
# This applies if a PV is placed directly on an md device.
# default_data_alignment will be overriden if it is not aligned
# with the value detected for this setting.
# This setting is overriden by data_alignment_detection,
# data_alignment, and the --dataalignment option.
md_chunk_alignment = 1
# Configuration option devices/default_data_alignment.
# Align the start of a PV data area with this number of MiB.
# Set to 1 for 1MiB, 2 for 2MiB, etc. Set to 0 to disable.
# This setting is overriden by data_alignment and the --dataalignment
# option.
# This configuration option has an automatic default value.
# default_data_alignment = 1
# Configuration option devices/data_alignment_detection.
# Align the start of a PV data area with sysfs io properties.
# The start of a PV data area will be a multiple of minimum_io_size or
# optimal_io_size exposed in sysfs. minimum_io_size is the smallest
# request the device can perform without incurring a read-modify-write
# penalty, e.g. MD chunk size. optimal_io_size is the device's
# preferred unit of receiving I/O, e.g. MD stripe width.
# minimum_io_size is used if optimal_io_size is undefined (0).
# If md_chunk_alignment is enabled, that detects the optimal_io_size.
# default_data_alignment and md_chunk_alignment will be overriden
# if they are not aligned with the value detected for this setting.
# This setting is overriden by data_alignment and the --dataalignment
# option.
data_alignment_detection = 1
# Configuration option devices/data_alignment.
# Align the start of a PV data area with this number of KiB.
# When non-zero, this setting overrides default_data_alignment.
# Set to 0 to disable, in which case default_data_alignment
# is used to align the first PE in units of MiB.
# This setting is overriden by the --dataalignment option.
data_alignment = 0
# Configuration option devices/data_alignment_offset_detection.
# Shift the start of an aligned PV data area based on sysfs information.
# After a PV data area is aligned, it will be shifted by the
# alignment_offset exposed in sysfs. This offset is often 0, but may
# be non-zero. Certain 4KiB sector drives that compensate for windows
# partitioning will have an alignment_offset of 3584 bytes (sector 7
# is the lowest aligned logical block, the 4KiB sectors start at
# LBA -1, and consequently sector 63 is aligned on a 4KiB boundary).
# This setting is overriden by the --dataalignmentoffset option.
data_alignment_offset_detection = 1
# Configuration option devices/ignore_suspended_devices.
# Ignore DM devices that have I/O suspended while scanning devices.
# Otherwise, LVM waits for a suspended device to become accessible.
# This should only be needed in recovery situations.
ignore_suspended_devices = 0
# Configuration option devices/ignore_lvm_mirrors.
# Do not scan 'mirror' LVs to avoid possible deadlocks.
# This avoids possible deadlocks when using the 'mirror' segment type.
# This setting determines whether LVs using the 'mirror' segment type
# are scanned for LVM labels. This affects the ability of mirrors to
# be used as physical volumes. If this setting is enabled, it is
# impossible to create VGs on top of mirror LVs, i.e. to stack VGs on
# mirror LVs. If this setting is disabled, allowing mirror LVs to be
# scanned, it may cause LVM processes and I/O to the mirror to become
# blocked. This is due to the way that the mirror segment type handles
# failures. In order for the hang to occur, an LVM command must be run
# just after a failure and before the automatic LVM repair process
# takes place, or there must be failures in multiple mirrors in the
# same VG at the same time with write failures occurring moments before
# a scan of the mirror's labels. The 'mirror' scanning problems do not
# apply to LVM RAID types like 'raid1' which handle failures in a
# different way, making them a better choice for VG stacking.
ignore_lvm_mirrors = 1
# Configuration option devices/require_restorefile_with_uuid.
# Allow use of pvcreate --uuid without requiring --restorefile.
require_restorefile_with_uuid = 1
# Configuration option devices/pv_min_size.
# Minimum size in KiB of block devices which can be used as PVs.
# In a clustered environment all nodes must use the same value.
# Any value smaller than 512KiB is ignored. The previous built-in
# value was 512.
pv_min_size = 2048
# Configuration option devices/issue_discards.
# Issue discards to PVs that are no longer used by an LV.
# Discards are sent to an LV's underlying physical volumes when the LV
# is no longer using the physical volumes' space, e.g. lvremove,
# lvreduce. Discards inform the storage that a region is no longer
# used. Storage that supports discards advertise the protocol-specific
# way discards should be issued by the kernel (TRIM, UNMAP, or
# WRITE SAME with UNMAP bit set). Not all storage will support or
# benefit from discards, but SSDs and thinly provisioned LUNs
# generally do. If enabled, discards will only be issued if both the
# storage and kernel provide support.
issue_discards = 1
# Configuration option devices/allow_changes_with_duplicate_pvs.
# Allow VG modification while a PV appears on multiple devices.
# When a PV appears on multiple devices, LVM attempts to choose the
# best device to use for the PV. If the devices represent the same
# underlying storage, the choice has minimal consequence. If the
# devices represent different underlying storage, the wrong choice
# can result in data loss if the VG is modified. Disabling this
# setting is the safest option because it prevents modifying a VG
# or activating LVs in it while a PV appears on multiple devices.
# Enabling this setting allows the VG to be used as usual even with
# uncertain devices.
allow_changes_with_duplicate_pvs = 0
}
allocation {
# Configuration option allocation/cling_tag_list.
# Advise LVM which PVs to use when searching for new space.
# When searching for free space to extend an LV, the 'cling' allocation
# policy will choose space on the same PVs as the last segment of the
# existing LV. If there is insufficient space and a list of tags is
# defined here, it will check whether any of them are attached to the
# PVs concerned and then seek to match those PV tags between existing
# extents and new extents.
#
# Example
# Use the special tag "@*" as a wildcard to match any PV tag:
# cling_tag_list = [ "@*" ]
# LVs are mirrored between two sites within a single VG, and
# PVs are tagged with either @site1 or @site2 to indicate where
# they are situated:
# cling_tag_list = [ "@site1", "@site2" ]
#
# This configuration option does not have a default value defined.
# Configuration option allocation/maximise_cling.
# Use a previous allocation algorithm.
# Changes made in version 2.02.85 extended the reach of the 'cling'
# policies to detect more situations where data can be grouped onto
# the same disks. This setting can be used to disable the changes
# and revert to the previous algorithm.
maximise_cling = 1
# Configuration option allocation/use_blkid_wiping.
# Use blkid to detect and erase existing signatures on new PVs and LVs.
# The blkid library can detect more signatures than the native LVM
# detection code, but may take longer. LVM needs to be compiled with
# blkid wiping support for this setting to apply. LVM native detection
# code is currently able to recognize: MD device signatures,
# swap signature, and LUKS signatures. To see the list of signatures
# recognized by blkid, check the output of the 'blkid -k' command.
use_blkid_wiping = 1
# Configuration option allocation/wipe_signatures_when_zeroing_new_lvs.
# Look for and erase any signatures while zeroing a new LV.
# The --wipesignatures option overrides this setting.
# Zeroing is controlled by the -Z/--zero option, and if not specified,
# zeroing is used by default if possible. Zeroing simply overwrites the
# first 4KiB of a new LV with zeroes and does no signature detection or
# wiping. Signature wiping goes beyond zeroing and detects exact types
# and positions of signatures within the whole LV. It provides a
# cleaner LV after creation as all known signatures are wiped. The LV
# is not claimed incorrectly by other tools because of old signatures
# from previous use. The number of signatures that LVM can detect
# depends on the detection code that is selected (see
# use_blkid_wiping.) Wiping each detected signature must be confirmed.
# When this setting is disabled, signatures on new LVs are not detected
# or erased unless the --wipesignatures option is used directly.
wipe_signatures_when_zeroing_new_lvs = 1
# Configuration option allocation/mirror_logs_require_separate_pvs.
# Mirror logs and images will always use different PVs.
# The default setting changed in version 2.02.85.
mirror_logs_require_separate_pvs = 0
# Configuration option allocation/raid_stripe_all_devices.
# Stripe across all PVs when RAID stripes are not specified.
# If enabled, all PVs in the VG or on the command line are used for
# raid0/4/5/6/10 when the command does not specify the number of
# stripes to use.
# This was the default behaviour until release 2.02.162.
# This configuration option has an automatic default value.
# raid_stripe_all_devices = 0
# Configuration option
allocation/cache_pool_metadata_require_separate_pvs.
# Cache pool metadata and data will always use different PVs.
cache_pool_metadata_require_separate_pvs = 0
# Configuration option allocation/cache_metadata_format.
# Sets default metadata format for new cache.
#
# Accepted values:
# 0 Automatically detected best available format
# 1 Original format
# 2 Improved 2nd. generation format
#
# This configuration option has an automatic default value.
# cache_metadata_format = 0
# Configuration option allocation/cache_mode.
# The default cache mode used for new cache.
#
# Accepted values:
# writethrough
# Data blocks are immediately written from the cache to disk.
# writeback
# Data blocks are written from the cache back to disk after some
# delay to improve performance.
#
# This setting replaces allocation/cache_pool_cachemode.
# This configuration option has an automatic default value.
# cache_mode = "writethrough"
# Configuration option allocation/cache_policy.
# The default cache policy used for new cache volume.
# Since kernel 4.2 the default policy is smq (Stochastic multiqueue),
# otherwise the older mq (Multiqueue) policy is selected.
# This configuration option does not have a default value defined.
# Configuration section allocation/cache_settings.
# Settings for the cache policy.
# See documentation for individual cache policies for more info.
# This configuration section has an automatic default value.
# cache_settings {
# }
# Configuration option allocation/cache_pool_chunk_size.
# The minimal chunk size in KiB for cache pool volumes.
# Using a chunk_size that is too large can result in wasteful use of
# the cache, where small reads and writes can cause large sections of
# an LV to be mapped into the cache. However, choosing a chunk_size
# that is too small can result in more overhead trying to manage the
# numerous chunks that become mapped into the cache. The former is
# more of a problem than the latter in most cases, so the default is
# on the smaller end of the spectrum. Supported values range from
# 32KiB to 1GiB in multiples of 32.
# This configuration option does not have a default value defined.
# Configuration option allocation/cache_pool_max_chunks.
# The maximum number of chunks in a cache pool.
# For cache target v1.9 the recommended maximumm is 1000000 chunks.
# Using cache pool with more chunks may degrade cache performance.
# This configuration option does not have a default value defined.
# Configuration option
allocation/thin_pool_metadata_require_separate_pvs.
# Thin pool metdata and data will always use different PVs.
thin_pool_metadata_require_separate_pvs = 0
# Configuration option allocation/thin_pool_zero.
# Thin pool data chunks are zeroed before they are first used.
# Zeroing with a larger thin pool chunk size reduces performance.
# This configuration option has an automatic default value.
# thin_pool_zero = 1
# Configuration option allocation/thin_pool_discards.
# The discards behaviour of thin pool volumes.
#
# Accepted values:
# ignore
# nopassdown
# passdown
#
# This configuration option has an automatic default value.
# thin_pool_discards = "passdown"
# Configuration option allocation/thin_pool_chunk_size_policy.
# The chunk size calculation policy for thin pool volumes.
#
# Accepted values:
# generic
# If thin_pool_chunk_size is defined, use it. Otherwise, calculate
# the chunk size based on estimation and device hints exposed in
# sysfs - the minimum_io_size. The chunk size is always at least
# 64KiB.
# performance
# If thin_pool_chunk_size is defined, use it. Otherwise, calculate
# the chunk size for performance based on device hints exposed in
# sysfs - the optimal_io_size. The chunk size is always at least
# 512KiB.
#
# This configuration option has an automatic default value.
# thin_pool_chunk_size_policy = "generic"
# Configuration option allocation/thin_pool_chunk_size.
# The minimal chunk size in KiB for thin pool volumes.
# Larger chunk sizes may improve performance for plain thin volumes,
# however using them for snapshot volumes is less efficient, as it
# consumes more space and takes extra time for copying. When unset,
# lvm tries to estimate chunk size starting from 64KiB. Supported
# values are in the range 64KiB to 1GiB.
# This configuration option does not have a default value defined.
# Configuration option allocation/physical_extent_size.
# Default physical extent size in KiB to use for new VGs.
# This configuration option has an automatic default value.
# physical_extent_size = 4096
# Configuration option allocation/vdo_use_compression.
# Enables or disables compression when creating a VDO volume.
# Compression may be disabled if necessary to maximize performance
# or to speed processing of data that is unlikely to compress.
# This configuration option has an automatic default value.
# vdo_use_compression = 1
# Configuration option allocation/vdo_use_deduplication.
# Enables or disables deduplication when creating a VDO volume.
# Deduplication may be disabled in instances where data is not expected
# to have good deduplication rates but compression is still desired.
# This configuration option has an automatic default value.
# vdo_use_deduplication = 1
# Configuration option allocation/vdo_emulate_512_sectors.
# Specifies that the VDO volume is to emulate a 512 byte block device.
# This configuration option has an automatic default value.
# vdo_emulate_512_sectors = 0
# Configuration option allocation/vdo_block_map_cache_size_mb.
# Specifies the amount of memory in MiB allocated for caching block map
# pages for VDO volume. The value must be a multiple of 4096 and must be
# at least 128MiB and less than 16TiB. The cache must be at least 16MiB
# per logical thread. Note that there is a memory overhead of 15%.
# This configuration option has an automatic default value.
# vdo_block_map_cache_size_mb = 128
# Configuration option allocation/vdo_block_map_period.
# Tunes the quantity of block map updates that can accumulate
# before cache pages are flushed to disk. The value must be
# at least 1 and less then 16380.
# A lower value means shorter recovery time but lower performance.
# This configuration option has an automatic default value.
# vdo_block_map_period = 16380
# Configuration option allocation/vdo_check_point_frequency.
# The default check point frequency for VDO volume.
# This configuration option has an automatic default value.
# vdo_check_point_frequency = 0
# Configuration option allocation/vdo_use_sparse_index.
# Enables sparse indexing for VDO volume.
# This configuration option has an automatic default value.
# vdo_use_sparse_index = 0
# Configuration option allocation/vdo_index_memory_size_mb.
# Specifies the amount of index memory in MiB for VDO volume.
# The value must be at least 256MiB and at most 1TiB.
# This configuration option has an automatic default value.
# vdo_index_memory_size_mb = 256
# Configuration option allocation/vdo_use_read_cache.
# Enables or disables the read cache within the VDO volume.
# The cache should be enabled if write workloads are expected
# to have high levels of deduplication, or for read intensive
# workloads of highly compressible data.
# This configuration option has an automatic default value.
# vdo_use_read_cache = 0
# Configuration option allocation/vdo_read_cache_size_mb.
# Specifies the extra VDO volume read cache size in MiB.
# This space is in addition to a system-defined minimum.
# The value must be less then 16TiB and 1.12 MiB of memory
# will be used per MiB of read cache specified, per bio thread.
# This configuration option has an automatic default value.
# vdo_read_cache_size_mb = 0
# Configuration option allocation/vdo_slab_size_mb.
# Specifies the size in MiB of the increment by which a VDO is grown.
# Using a smaller size constrains the total maximum physical size
# that can be accommodated. Must be a power of two between 128MiB and
32GiB.
# This configuration option has an automatic default value.
# vdo_slab_size_mb = 2048
# Configuration option allocation/vdo_ack_threads.
# Specifies the number of threads to use for acknowledging
# completion of requested VDO I/O operations.
# The value must be at in range [0..100].
# This configuration option has an automatic default value.
# vdo_ack_threads = 1
# Configuration option allocation/vdo_bio_threads.
# Specifies the number of threads to use for submitting I/O
# operations to the storage device of VDO volume.
# The value must be in range [1..100]
# Each additional thread after the first will use an additional 18MiB
of RAM,
# plus 1.12 MiB of RAM per megabyte of configured read cache size.
# This configuration option has an automatic default value.
# vdo_bio_threads = 1
# Configuration option allocation/vdo_bio_rotation.
# Specifies the number of I/O operations to enqueue for each
bio-submission
# thread before directing work to the next. The value must be in range
[1..1024].
# This configuration option has an automatic default value.
# vdo_bio_rotation = 64
# Configuration option allocation/vdo_cpu_threads.
# Specifies the number of threads to use for CPU-intensive work such as
# hashing or compression for VDO volume. The value must be in range
[1..100]
# This configuration option has an automatic default value.
# vdo_cpu_threads = 2
# Configuration option allocation/vdo_hash_zone_threads.
# Specifies the number of threads across which to subdivide parts of
the VDO
# processing based on the hash value computed from the block data.
# The value must be at in range [0..100].
# vdo_hash_zone_threads, vdo_logical_threads and vdo_physical_threads
must be
# either all zero or all non-zero.
# This configuration option has an automatic default value.
# vdo_hash_zone_threads = 1
# Configuration option allocation/vdo_logical_threads.
# Specifies the number of threads across which to subdivide parts of
the VDO
# processing based on the hash value computed from the block data.
# A logical thread count of 9 or more will require explicitly specifying
# a sufficiently large block map cache size, as well.
# The value must be in range [0..100].
# vdo_hash_zone_threads, vdo_logical_threads and vdo_physical_threads
must be
# either all zero or all non-zero.
# This configuration option has an automatic default value.
# vdo_logical_threads = 1
# Configuration option allocation/vdo_physical_threads.
# Specifies the number of threads across which to subdivide parts of
the VDO
# processing based on physical block addresses.
# Each additional thread after the first will use an additional 10MiB
of RAM.
# The value must be in range [0..16].
# vdo_hash_zone_threads, vdo_logical_threads and vdo_physical_threads
must be
# either all zero or all non-zero.
# This configuration option has an automatic default value.
# vdo_physical_threads = 1
# Configuration option allocation/vdo_write_policy.
# Specifies the write policy:
# auto - VDO will check the storage device and determine whether it
supports flushes.
# If it does, VDO will run in async mode, otherwise it will run
in sync mode.
# sync - Writes are acknowledged only after data is stably written.
# This policy is not supported if the underlying storage is not
also synchronous.
# async - Writes are acknowledged after data has been cached for
writing to stable storage.
# Data which has not been flushed is not guaranteed to persist
in this mode.
# This configuration option has an automatic default value.
# vdo_write_policy = "auto"
}
log {
# Configuration option log/report_command_log.
# Enable or disable LVM log reporting.
# If enabled, LVM will collect a log of operations, messages,
# per-object return codes with object identification and associated
# error numbers (errnos) during LVM command processing. Then the
# log is either reported solely or in addition to any existing
# reports, depending on LVM command used. If it is a reporting command
# (e.g. pvs, vgs, lvs, lvm fullreport), then the log is reported in
# addition to any existing reports. Otherwise, there's only log report
# on output. For all applicable LVM commands, you can request that
# the output has only log report by using --logonly command line
# option. Use log/command_log_cols and log/command_log_sort settings
# to define fields to display and sort fields for the log report.
# You can also use log/command_log_selection to define selection
# criteria used each time the log is reported.
# This configuration option has an automatic default value.
# report_command_log = 0
# Configuration option log/command_log_sort.
# List of columns to sort by when reporting command log.
# See <lvm command> --logonly --configreport log -o help
# for the list of possible fields.
# This configuration option has an automatic default value.
# command_log_sort = "log_seq_num"
# Configuration option log/command_log_cols.
# List of columns to report when reporting command log.
# See <lvm command> --logonly --configreport log -o help
# for the list of possible fields.
# This configuration option has an automatic default value.
# command_log_cols =
"log_seq_num,log_type,log_context,log_object_type,log_object_name,log_object_id,log_object_group,log_object_group_id,log_message,log_errno,log_ret_code"
# Configuration option log/command_log_selection.
# Selection criteria used when reporting command log.
# You can define selection criteria that are applied each
# time log is reported. This way, it is possible to control the
# amount of log that is displayed on output and you can select
# only parts of the log that are important for you. To define
# selection criteria, use fields from log report. See also
# <lvm command> --logonly --configreport log -S help for the
# list of possible fields and selection operators. You can also
# define selection criteria for log report on command line directly
# using <lvm command> --configreport log -S <selection criteria>
# which has precedence over log/command_log_selection setting.
# For more information about selection criteria in general, see
# lvm(8) man page.
# This configuration option has an automatic default value.
# command_log_selection = "!(log_type=status && message=success)"
# Configuration option log/verbose.
# Controls the messages sent to stdout or stderr.
verbose = 0
# Configuration option log/silent.
# Suppress all non-essential messages from stdout.
# This has the same effect as -qq. When enabled, the following commands
# still produce output: dumpconfig, lvdisplay, lvmdiskscan, lvs, pvck,
# pvdisplay, pvs, version, vgcfgrestore -l, vgdisplay, vgs.
# Non-essential messages are shifted from log level 4 to log level 5
# for syslog and lvm2_log_fn purposes.
# Any 'yes' or 'no' questions not overridden by other arguments are
# suppressed and default to 'no'.
silent = 0
# Configuration option log/syslog.
# Send log messages through syslog.
syslog = 1
# Configuration option log/file.
# Write error and debug log messages to a file specified here.
# This configuration option does not have a default value defined.
# Configuration option log/overwrite.
# Overwrite the log file each time the program is run.
overwrite = 0
# Configuration option log/level.
# The level of log messages that are sent to the log file 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
# Configuration option log/indent.
# Indent messages according to their severity.
indent = 1
# Configuration option log/command_names.
# Display the command name on each line of output.
command_names = 0
# Configuration option log/prefix.
# A prefix to use before the log message text.
# (After the command name, if selected).
# Two spaces allows you to see/grep the severity of each message.
# To make the messages look similar to the original LVM tools use:
# indent = 0, command_names = 1, prefix = " -- "
prefix = " "
# Configuration option log/activation.
# Log messages during activation.
# Don't use this in low memory situations (can deadlock).
activation = 0
# Configuration option log/debug_classes.
# Select log messages by class.
# Some debugging messages are assigned to a class and only appear in
# debug output if the class is listed here. Classes currently
# available: memory, devices, io, activation, allocation,
# metadata, cache, locking, lvmpolld. Use "all" to see everything.
debug_classes = [ "memory", "devices", "io", "activation",
"allocation", "metadata", "cache", "locking", "lvmpolld", "dbus" ]
}
backup {
# Configuration option backup/backup.
# Maintain a backup of the current metadata configuration.
# Think very hard before turning this off!
backup = 1
# Configuration option backup/backup_dir.
# Location of the metadata backup files.
# Remember to back up this directory regularly!
backup_dir = "/etc/lvm/backup"
# Configuration option backup/archive.
# Maintain an archive of old metadata configurations.
# Think very hard before turning this off.
archive = 1
# Configuration option backup/archive_dir.
# Location of the metdata archive files.
# Remember to back up this directory regularly!
archive_dir = "/etc/lvm/archive"
# Configuration option backup/retain_min.
# Minimum number of archives to keep.
retain_min = 10
# Configuration option backup/retain_days.
# Minimum number of days to keep archive files.
retain_days = 30
}
shell {
# Configuration option shell/history_size.
# Number of lines of history to store in ~/.lvm_history.
history_size = 100
}
global {
# Configuration option global/umask.
# The file creation mask for any files and directories created.
# Interpreted as octal if the first digit is zero.
umask = 077
# Configuration option global/test.
# No on-disk metadata changes will be made in test mode.
# Equivalent to having the -t option on every command.
test = 0
# Configuration option global/units.
# Default value for --units argument.
units = "r"
# Configuration option global/si_unit_consistency.
# Distinguish between powers of 1024 and 1000 bytes.
# The LVM commands distinguish between powers of 1024 bytes,
# e.g. KiB, MiB, GiB, and powers of 1000 bytes, e.g. KB, MB, GB.
# If scripts depend on the old behaviour, disable this setting
# temporarily until they are updated.
si_unit_consistency = 1
# Configuration option global/suffix.
# Display unit suffix for sizes.
# This setting has no effect if the units are in human-readable form
# (global/units = "h") in which case the suffix is always displayed.
suffix = 1
# Configuration option global/activation.
# Enable/disable communication with the kernel device-mapper.
# Disable to use the tools to manipulate LVM metadata without
# activating any logical volumes. If the device-mapper driver
# is not present in the kernel, disabling this should suppress
# the error messages.
activation = 1
# Configuration option global/segment_libraries.
# This configuration option does not have a default value defined.
# Configuration option global/proc.
# Location of proc filesystem.
# This configuration option is advanced.
proc = "/proc"
# Configuration option global/etc.
# Location of /etc system configuration directory.
etc = "/etc"
# Configuration option global/wait_for_locks.
# When disabled, fail if a lock request would block.
wait_for_locks = 1
# Configuration option global/locking_dir.
# Directory to use for LVM command file locks.
# 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 = "/run/lock/lvm"
# Configuration option global/prioritise_write_locks.
# Allow quicker VG write access during high volume read access.
# When there are competing read-only and read-write access requests for
# a volume group's metadata, instead of always granting the read-only
# requests immediately, delay them to allow the read-write requests to
# be serviced. Without this setting, write access may be stalled by a
# high volume of read-only requests. This option only affects
# locking_type 1 viz. local file-based locking.
prioritise_write_locks = 1
# Configuration option global/library_dir.
# Search this directory first for shared libraries.
# This configuration option does not have a default value defined.
# Configuration option global/abort_on_internal_errors.
# Abort a command that encounters an internal error.
# Treat any internal errors as fatal errors, aborting the process that
# encountered the internal error. Please only enable for debugging.
abort_on_internal_errors = 0
# Configuration option global/metadata_read_only.
# No operations that change on-disk metadata are permitted.
# Additionally, read-only commands that encounter metadata in need of
# repair will still be allowed to proceed exactly as if the repair had
# been performed (except for the unchanged vg_seqno). Inappropriate
# use could mess up your system, so seek advice first!
metadata_read_only = 0
# Configuration option global/mirror_segtype_default.
# The segment type used by the short mirroring option -m.
# The --type mirror|raid1 option overrides this setting.
#
# Accepted values:
# mirror
# The original RAID1 implementation from LVM/DM. It is
# characterized by a flexible log solution (core, disk, mirrored),
# and by the necessity to block I/O while handling a failure.
# There is an inherent race in the dmeventd failure handling logic
# with snapshots of devices using this type of RAID1 that in the
# worst case could cause a deadlock. (Also see
# devices/ignore_lvm_mirrors.)
# raid1
# This is a newer RAID1 implementation using the MD RAID1
# personality through device-mapper. It is characterized by a
# lack of log options. (A log is always allocated for every
# device and they are placed on the same device as the image,
# so no separate devices are required.) This mirror
# implementation does not require I/O to be blocked while
# handling a failure. This mirror implementation is not
# cluster-aware and cannot be used in a shared (active/active)
# fashion in a cluster.
#
mirror_segtype_default = "raid1"
# Configuration option global/raid10_segtype_default.
# The segment type used by the -i -m combination.
# The --type raid10|mirror option overrides this setting.
# The --stripes/-i and --mirrors/-m options can both be specified
# during the creation of a logical volume to use both striping and
# mirroring for the LV. There are two different implementations.
#
# Accepted values:
# raid10
# LVM uses MD's RAID10 personality through DM. This is the
# preferred option.
# mirror
# LVM layers the 'mirror' and 'stripe' segment types. The layering
# is done by creating a mirror LV on top of striped sub-LVs,
# effectively creating a RAID 0+1 array. The layering is suboptimal
# in terms of providing redundancy and performance.
#
raid10_segtype_default = "raid10"
# Configuration option global/sparse_segtype_default.
# The segment type used by the -V -L combination.
# The --type snapshot|thin option overrides this setting.
# The combination of -V and -L options creates a sparse LV. There are
# two different implementations.
#
# Accepted values:
# snapshot
# The original snapshot implementation from LVM/DM. It uses an old
# snapshot that mixes data and metadata within a single COW
# storage volume and performs poorly when the size of stored data
# passes hundreds of MB.
# thin
# A newer implementation that uses thin provisioning. It has a
# bigger minimal chunk size (64KiB) and uses a separate volume for
# metadata. It has better performance, especially when more data
# is used. It also supports full snapshots.
#
sparse_segtype_default = "thin"
# Configuration option global/lvdisplay_shows_full_device_path.
# Enable this to reinstate the previous lvdisplay name format.
# The default format for displaying LV names in lvdisplay was changed
# in version 2.02.89 to show the LV name and path separately.
# Previously this was always shown as /dev/vgname/lvname even when that
# was never a valid path in the /dev filesystem.
# This configuration option has an automatic default value.
# lvdisplay_shows_full_device_path = 0
# Configuration option global/event_activation.
# Activate LVs based on system-generated device events.
# When a device appears on the system, a system-generated event runs
# the pvscan command to activate LVs if the new PV completes the VG.
# Use auto_activation_volume_list to select which LVs should be
# activated from these events (the default is all.)
# When event_activation is disabled, the system will generally run
# a direct activation command to activate LVs in complete VGs.
event_activation = 1
# Configuration option global/use_aio.
# Use async I/O when reading and writing devices.
# This configuration option has an automatic default value.
# use_aio = 1
# Configuration option global/use_lvmlockd.
# Use lvmlockd for locking among hosts using LVM on shared storage.
# Applicable only if LVM is compiled with lockd support in which
# case there is also lvmlockd(8) man page available for more
# information.
use_lvmlockd = 0
# Configuration option global/lvmlockd_lock_retries.
# Retry lvmlockd lock requests this many times.
# Applicable only if LVM is compiled with lockd support
# This configuration option has an automatic default value.
# lvmlockd_lock_retries = 3
# Configuration option global/sanlock_lv_extend.
# Size in MiB to extend the internal LV holding sanlock locks.
# The internal LV holds locks for each LV in the VG, and after enough
# LVs have been created, the internal LV needs to be extended. lvcreate
# will automatically extend the internal LV when needed by the amount
# specified here. Setting this to 0 disables the automatic extension
# and can cause lvcreate to fail. Applicable only if LVM is compiled
# with lockd support
# This configuration option has an automatic default value.
# sanlock_lv_extend = 256
# Configuration option global/thin_check_executable.
# The full path to the thin_check command.
# LVM uses this command to check that a thin metadata device is in a
# usable state. When a thin pool is activated and after it is
# deactivated, this command is run. Activation will only proceed if
# the command has an exit status of 0. Set to "" to skip this check.
# (Not recommended.) Also see thin_check_options.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# thin_check_executable = "/usr/sbin/thin_check"
# Configuration option global/thin_dump_executable.
# The full path to the thin_dump command.
# LVM uses this command to dump thin pool metadata.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# thin_dump_executable = "/usr/sbin/thin_dump"
# Configuration option global/thin_repair_executable.
# The full path to the thin_repair command.
# LVM uses this command to repair a thin metadata device if it is in
# an unusable state. Also see thin_repair_options.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# thin_repair_executable = "/usr/sbin/thin_repair"
# Configuration option global/thin_check_options.
# List of options passed to the thin_check command.
# With thin_check version 2.1 or newer you can add the option
# --ignore-non-fatal-errors to let it pass through ignorable errors
# and fix them later. With thin_check version 3.2 or newer you should
# include the option --clear-needs-check-flag.
# This configuration option has an automatic default value.
# thin_check_options = [ "-q", "--clear-needs-check-flag" ]
# Configuration option global/thin_repair_options.
# List of options passed to the thin_repair command.
# This configuration option has an automatic default value.
# thin_repair_options = [ "" ]
# Configuration option global/thin_disabled_features.
# Features to not use in the thin driver.
# This can be helpful for testing, or to avoid using a feature that is
# causing problems. Features include: block_size, discards,
# discards_non_power_2, external_origin, metadata_resize,
# external_origin_extend, error_if_no_space.
#
# Example
# thin_disabled_features = [ "discards", "block_size" ]
#
# This configuration option does not have a default value defined.
# Configuration option global/cache_disabled_features.
# Features to not use in the cache driver.
# This can be helpful for testing, or to avoid using a feature that is
# causing problems. Features include: policy_mq, policy_smq, metadata2.
#
# Example
# cache_disabled_features = [ "policy_smq" ]
#
# This configuration option does not have a default value defined.
# Configuration option global/cache_check_executable.
# The full path to the cache_check command.
# LVM uses this command to check that a cache metadata device is in a
# usable state. When a cached LV is activated and after it is
# deactivated, this command is run. Activation will only proceed if the
# command has an exit status of 0. Set to "" to skip this check.
# (Not recommended.) Also see cache_check_options.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# cache_check_executable = "/usr/sbin/cache_check"
# Configuration option global/cache_dump_executable.
# The full path to the cache_dump command.
# LVM uses this command to dump cache pool metadata.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# cache_dump_executable = "/usr/sbin/cache_dump"
# Configuration option global/cache_repair_executable.
# The full path to the cache_repair command.
# LVM uses this command to repair a cache metadata device if it is in
# an unusable state. Also see cache_repair_options.
# (See package device-mapper-persistent-data or thin-provisioning-tools)
# This configuration option has an automatic default value.
# cache_repair_executable = "/usr/sbin/cache_repair"
# Configuration option global/cache_check_options.
# List of options passed to the cache_check command.
# With cache_check version 5.0 or newer you should include the option
# --clear-needs-check-flag.
# This configuration option has an automatic default value.
# cache_check_options = [ "-q", "--clear-needs-check-flag" ]
# Configuration option global/cache_repair_options.
# List of options passed to the cache_repair command.
# This configuration option has an automatic default value.
# cache_repair_options = [ "" ]
# Configuration option global/vdo_format_executable.
# The full path to the vdoformat command.
# LVM uses this command to initial data volume for VDO type logical
volume
# This configuration option has an automatic default value.
# vdo_format_executable = "autodetect"
# Configuration option global/vdo_format_options.
# List of options passed added to standard vdoformat command.
# This configuration option has an automatic default value.
# vdo_format_options = [ "" ]
# Configuration option global/fsadm_executable.
# The full path to the fsadm command.
# LVM uses this command to help with lvresize -r operations.
# This configuration option has an automatic default value.
# fsadm_executable = "/sbin/fsadm"
# Configuration option global/system_id_source.
# The method LVM uses to set the local system ID.
# Volume Groups can also be given a system ID (by vgcreate, vgchange,
# or vgimport.) A VG on shared storage devices is accessible only to
# the host with a matching system ID. See 'man lvmsystemid' for
# information on limitations and correct usage.
#
# Accepted values:
# none
# The host has no system ID.
# lvmlocal
# Obtain the system ID from the system_id setting in the 'local'
# section of an lvm configuration file, e.g. lvmlocal.conf.
# uname
# Set the system ID from the hostname (uname) of the system.
# System IDs beginning localhost are not permitted.
# machineid
# Use the contents of the machine-id file to set the system ID.
# Some systems create this file at installation time.
# See 'man machine-id' and global/etc.
# file
# Use the contents of another file (system_id_file) to set the
# system ID.
#
system_id_source = "none"
# Configuration option global/system_id_file.
# The full path to the file containing a system ID.
# This is used when system_id_source is set to 'file'.
# Comments starting with the character # are ignored.
# This configuration option does not have a default value defined.
# Configuration option global/use_lvmpolld.
# Use lvmpolld to supervise long running LVM commands.
# When enabled, control of long running LVM commands is transferred
# from the original LVM command to the lvmpolld daemon. This allows
# the operation to continue independent of the original LVM command.
# After lvmpolld takes over, the LVM command displays the progress
# of the ongoing operation. lvmpolld itself runs LVM commands to
# manage the progress of ongoing operations. lvmpolld can be used as
# a native systemd service, which allows it to be started on demand,
# and to use its own control group. When this option is disabled, LVM
# commands will supervise long running operations by forking themselves.
# Applicable only if LVM is compiled with lvmpolld support.
use_lvmpolld = 1
# Configuration option global/notify_dbus.
# Enable D-Bus notification from LVM commands.
# When enabled, an LVM command that changes PVs, changes VG metadata,
# or changes the activation state of an LV will send a notification.
notify_dbus = 1
}
activation {
# Configuration option activation/checks.
# Perform internal checks of libdevmapper operations.
# Useful for debugging problems with activation. Some of the checks may
# be expensive, so it's best to use this only when there seems to be a
# problem.
checks = 0
# Configuration option activation/udev_sync.
# Use udev notifications to synchronize udev and LVM.
# The --nodevsync option overrides this setting.
# When disabled, LVM commands will not wait for notifications from
# udev, but continue irrespective of any possible udev processing in
# the background. Only use this if udev is not running or has rules
# that ignore the devices LVM creates. If enabled when udev is not
# running, and LVM processes are waiting for udev, run the command
# 'dmsetup udevcomplete_all' to wake them up.
udev_sync = 1
# Configuration option activation/udev_rules.
# Use udev rules to manage LV device nodes and symlinks.
# When disabled, LVM will manage the device nodes and symlinks for
# active LVs itself. Manual intervention may be required if this
# setting is changed while LVs are active.
udev_rules = 1
# Configuration option activation/verify_udev_operations.
# Use extra checks in LVM to verify udev operations.
# This enables additional checks (and if necessary, repairs) on entries
# in the device directory after udev has completed processing its
# events. Useful for diagnosing problems with LVM/udev interactions.
verify_udev_operations = 0
# Configuration option activation/retry_deactivation.
# Retry failed LV deactivation.
# If LV deactivation fails, LVM will retry for a few seconds before
# failing. This may happen because a process run from a quick udev rule
# temporarily opened the device.
retry_deactivation = 1
# Configuration option activation/missing_stripe_filler.
# Method to fill missing stripes when activating an incomplete LV.
# Using 'error' will make inaccessible parts of the device return I/O
# errors on access. Using 'zero' will return success (and zero) on I/O
# You can instead use a device path, in which case,
# that device will be used in place of missing stripes. Using anything
# other than 'error' with mirrored or snapshotted volumes is likely to
# result in data corruption.
# This configuration option is advanced.
missing_stripe_filler = "error"
# Configuration option activation/use_linear_target.
# Use the linear target to optimize single stripe LVs.
# When disabled, the striped target is used. The linear target is an
# optimised version of the striped target that only handles a single
# stripe.
use_linear_target = 1
# Configuration option activation/reserved_stack.
# Stack size in KiB to reserve for use while devices are suspended.
# Insufficent reserve risks I/O deadlock during device suspension.
reserved_stack = 64
# Configuration option activation/reserved_memory.
# Memory size in KiB to reserve for use while devices are suspended.
# Insufficent reserve risks I/O deadlock during device suspension.
reserved_memory = 8192
# Configuration option activation/process_priority.
# Nice value used while devices are suspended.
# Use a high priority so that LVs are suspended
# for the shortest possible time.
process_priority = -18
# Configuration option activation/volume_list.
# Only LVs selected by this list are activated.
# If this list is defined, an LV is only activated if it matches an
# entry in this list. If this list is undefined, it imposes no limits
# on LV activation (all are allowed).
#
# Accepted values:
# vgname
# The VG name is matched exactly and selects all LVs in the VG.
# vgname/lvname
# The VG name and LV name are matched exactly and selects the LV.
# @tag
# Selects an LV if the specified tag matches a tag set on the LV
# or VG.
# @*
# Selects an LV if a tag defined on the host is also set on the LV
# or VG. See tags/hosttags. If any host tags exist but volume_list
# is not defined, a default single-entry list containing '@*'
# is assumed.
#
# Example
# volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
#
# This configuration option does not have a default value defined.
# Configuration option activation/auto_activation_volume_list.
# Only LVs selected by this list are auto-activated.
# This list works like volume_list, but it is used only by
# auto-activation commands. It does not apply to direct activation
# commands. If this list is defined, an LV is only auto-activated
# if it matches an entry in this list. If this list is undefined, it
# imposes no limits on LV auto-activation (all are allowed.) If this
# list is defined and empty, i.e. "[]", then no LVs are selected for
# auto-activation. An LV that is selected by this list for
# auto-activation, must also be selected by volume_list (if defined)
# before it is activated. Auto-activation is an activation command that
# includes the 'a' argument: --activate ay or -a ay. The 'a' (auto)
# argument for auto-activation is meant to be used by activation
# commands that are run automatically by the system, as opposed to LVM
# commands run directly by a user. A user may also use the 'a' flag
# directly to perform auto-activation. Also see pvscan(8) for more
# information about auto-activation.
#
# Accepted values:
# vgname
# The VG name is matched exactly and selects all LVs in the VG.
# vgname/lvname
# The VG name and LV name are matched exactly and selects the LV.
# @tag
# Selects an LV if the specified tag matches a tag set on the LV
# or VG.
# @*
# Selects an LV if a tag defined on the host is also set on the LV
# or VG. See tags/hosttags. If any host tags exist but volume_list
# is not defined, a default single-entry list containing '@*'
# is assumed.
#
# Example
# auto_activation_volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
#
# This configuration option does not have a default value defined.
# Configuration option activation/read_only_volume_list.
# LVs in this list are activated in read-only mode.
# If this list is defined, each LV that is to be activated is checked
# against this list, and if it matches, it is activated in read-only
# mode. This overrides the permission setting stored in the metadata,
# e.g. from --permission rw.
#
# Accepted values:
# vgname
# The VG name is matched exactly and selects all LVs in the VG.
# vgname/lvname
# The VG name and LV name are matched exactly and selects the LV.
# @tag
# Selects an LV if the specified tag matches a tag set on the LV
# or VG.
# @*
# Selects an LV if a tag defined on the host is also set on the LV
# or VG. See tags/hosttags. If any host tags exist but volume_list
# is not defined, a default single-entry list containing '@*'
# is assumed.
#
# Example
# read_only_volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
#
# This configuration option does not have a default value defined.
# Configuration option activation/raid_region_size.
# Size in KiB of each raid or mirror synchronization region.
# The clean/dirty state of data is tracked for each region.
# The value is rounded down to a power of two if necessary, and
# is ignored if it is not a multiple of the machine memory page size.
raid_region_size = 2048
# Configuration option activation/error_when_full.
# Return errors if a thin pool runs out of space.
# The --errorwhenfull option overrides this setting.
# When enabled, writes to thin LVs immediately return an error if the
# thin pool is out of data space. When disabled, writes to thin LVs
# are queued if the thin pool is out of space, and processed when the
# thin pool data space is extended. New thin pools are assigned the
# behavior defined here.
# This configuration option has an automatic default value.
# error_when_full = 0
# Configuration option activation/readahead.
# Setting to use when there is no readahead setting in metadata.
#
# Accepted values:
# none
# Disable readahead.
# auto
# Use default value chosen by kernel.
#
readahead = "auto"
# Configuration option activation/raid_fault_policy.
# Defines how a device failure in a RAID LV is handled.
# This includes LVs that have the following segment types:
# raid1, raid4, raid5*, and raid6*.
# If a device in the LV fails, the policy determines the steps
# performed by dmeventd automatically, and the steps perfomed by the
# manual command lvconvert --repair --use-policies.
# Automatic handling requires dmeventd to be monitoring the LV.
#
# Accepted values:
# warn
# Use the system log to warn the user that a device in the RAID LV
# has failed. It is left to the user to run lvconvert --repair
# manually to remove or replace the failed device. As long as the
# number of failed devices does not exceed the redundancy of the LV
# (1 device for raid4/5, 2 for raid6), the LV will remain usable.
# allocate
# Attempt to use any extra physical volumes in the VG as spares and
# replace faulty devices.
#
raid_fault_policy = "warn"
# Configuration option activation/mirror_image_fault_policy.
# Defines how a device failure in a 'mirror' LV is handled.
# An LV with the 'mirror' segment type is composed of mirror images
# (copies) and a mirror log. A disk log ensures that a mirror LV does
# not need to be re-synced (all copies made the same) every time a
# machine reboots or crashes. If a device in the LV fails, this policy
# determines the steps perfomed by dmeventd automatically, and the steps
# performed by the manual command lvconvert --repair --use-policies.
# Automatic handling requires dmeventd to be monitoring the LV.
#
# Accepted values:
# remove
# Simply remove the faulty device and run without it. If the log
# device fails, the mirror would convert to using an in-memory log.
# This means the mirror will not remember its sync status across
# crashes/reboots and the entire mirror will be re-synced. If a
# mirror image fails, the mirror will convert to a non-mirrored
# device if there is only one remaining good copy.
# allocate
# Remove the faulty device and try to allocate space on a new
# device to be a replacement for the failed device. Using this
# policy for the log is fast and maintains the ability to remember
# sync state through crashes/reboots. Using this policy for a
# mirror device is slow, as it requires the mirror to resynchronize
# the devices, but it will preserve the mirror characteristic of
# the device. This policy acts like 'remove' if no suitable device
# and space can be allocated for the replacement.
# allocate_anywhere
# Not yet implemented. Useful to place the log device temporarily
# on the same physical volume as one of the mirror images. This
# policy is not recommended for mirror devices since it would break
# the redundant nature of the mirror. This policy acts like
# 'remove' if no suitable device and space can be allocated for the
# replacement.
#
mirror_image_fault_policy = "remove"
# Configuration option activation/mirror_log_fault_policy.
# Defines how a device failure in a 'mirror' log LV is handled.
# The mirror_image_fault_policy description for mirrored LVs also
# applies to mirrored log LVs.
mirror_log_fault_policy = "allocate"
# Configuration option activation/snapshot_autoextend_threshold.
# Auto-extend a snapshot when its usage exceeds this percent.
# Setting this to 100 disables automatic extension.
# The minimum value is 50 (a smaller value is treated as 50.)
# Also see snapshot_autoextend_percent.
# Automatic extension requires dmeventd to be monitoring the LV.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 1G
# snapshot exceeds 700M, it is extended to 1.2G, and when it exceeds
# 840M, it is extended to 1.44G:
# snapshot_autoextend_threshold = 70
#
snapshot_autoextend_threshold = 100
# Configuration option activation/snapshot_autoextend_percent.
# Auto-extending a snapshot adds this percent extra space.
# The amount of additional space added to a snapshot is this
# percent of its current size.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 1G
# snapshot exceeds 700M, it is extended to 1.2G, and when it exceeds
# 840M, it is extended to 1.44G:
# snapshot_autoextend_percent = 20
#
snapshot_autoextend_percent = 20
# Configuration option activation/thin_pool_autoextend_threshold.
# Auto-extend a thin pool when its usage exceeds this percent.
# Setting this to 100 disables automatic extension.
# The minimum value is 50 (a smaller value is treated as 50.)
# Also see thin_pool_autoextend_percent.
# Automatic extension requires dmeventd to be monitoring the LV.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 1G
# thin pool exceeds 700M, it is extended to 1.2G, and when it exceeds
# 840M, it is extended to 1.44G:
# thin_pool_autoextend_threshold = 70
#
thin_pool_autoextend_threshold = 100
# Configuration option activation/thin_pool_autoextend_percent.
# Auto-extending a thin pool adds this percent extra space.
# The amount of additional space added to a thin pool is this
# percent of its current size.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 1G
# thin pool exceeds 700M, it is extended to 1.2G, and when it exceeds
# 840M, it is extended to 1.44G:
# thin_pool_autoextend_percent = 20
#
thin_pool_autoextend_percent = 20
# Configuration option activation/vdo_pool_autoextend_threshold.
# Auto-extend a VDO pool when its usage exceeds this percent.
# Setting this to 100 disables automatic extension.
# The minimum value is 50 (a smaller value is treated as 50.)
# Also see vdo_pool_autoextend_percent.
# Automatic extension requires dmeventd to be monitoring the LV.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 10G
# VDO pool exceeds 7G, it is extended to 12G, and when it exceeds
# 8.4G, it is extended to 14.4G:
# vdo_pool_autoextend_threshold = 70
#
vdo_pool_autoextend_threshold = 100
# Configuration option activation/vdo_pool_autoextend_percent.
# Auto-extending a VDO pool adds this percent extra space.
# The amount of additional space added to a VDO pool is this
# percent of its current size.
#
# Example
# Using 70% autoextend threshold and 20% autoextend size, when a 10G
# VDO pool exceeds 7G, it is extended to 12G, and when it exceeds
# 8.4G, it is extended to 14.4G:
# This configuration option has an automatic default value.
# vdo_pool_autoextend_percent = 20
# Configuration option activation/mlock_filter.
# Do not mlock these memory areas.
# While activating devices, I/O to devices being (re)configured is
# suspended. As a precaution against deadlocks, LVM pins memory it is
# using so it is not paged out, and will not require I/O to reread.
# Groups of pages that are known not to be accessed during activation
# do not need to be pinned into memory. Each string listed in this
# setting is compared against each line in /proc/self/maps, and the
# pages corresponding to lines that match are not pinned. On some
# systems, locale-archive was found to make up over 80% of the memory
# used by the process.
#
# Example
# mlock_filter = [ "locale/locale-archive", "gconv/gconv-modules.cache"
]
#
# This configuration option is advanced.
# This configuration option does not have a default value defined.
# Configuration option activation/use_mlockall.
# Use the old behavior of mlockall to pin all memory.
# Prior to version 2.02.62, LVM used mlockall() to pin the whole
# process's memory while activating devices.
use_mlockall = 0
# Configuration option activation/monitoring.
# Monitor LVs that are activated.
# The --ignoremonitoring option overrides this setting.
# When enabled, LVM will ask dmeventd to monitor activated LVs.
monitoring = 1
# Configuration option activation/polling_interval.
# Check pvmove or lvconvert progress at this interval (seconds).
# When pvmove or lvconvert must wait for the kernel to finish
# synchronising or merging data, they check and report progress at
# intervals of this number of seconds. If this is set to 0 and there
# is only one thing to wait for, there are no progress reports, but
# the process is awoken immediately once the operation is complete.
polling_interval = 15
# Configuration option activation/auto_set_activation_skip.
# Set the activation skip flag on new thin snapshot LVs.
# The --setactivationskip option overrides this setting.
# An LV can have a persistent 'activation skip' flag. The flag causes
# the LV to be skipped during normal activation. The lvchange/vgchange
# -K option is required to activate LVs that have the activation skip
# flag set. When this setting is enabled, the activation skip flag is
# set on new thin snapshot LVs.
# This configuration option has an automatic default value.
# auto_set_activation_skip = 1
# Configuration option activation/activation_mode.
# How LVs with missing devices are activated.
# The --activationmode option overrides this setting.
#
# Accepted values:
# complete
# Only allow activation of an LV if all of the Physical Volumes it
# uses are present. Other PVs in the Volume Group may be missing.
# degraded
# Like complete, but additionally RAID LVs of segment type raid1,
# raid4, raid5, radid6 and raid10 will be activated if there is no
# data loss, i.e. they have sufficient redundancy to present the
# entire addressable range of the Logical Volume.
# partial
# Allows the activation of any LV even if a missing or failed PV
# could cause data loss with a portion of the LV inaccessible.
# This setting should not normally be used, but may sometimes
# assist with data recovery.
#
activation_mode = "degraded"
# Configuration option activation/lock_start_list.
# Locking is started only for VGs selected by this list.
# The rules are the same as those for volume_list.
# This configuration option does not have a default value defined.
# Configuration option activation/auto_lock_start_list.
# Locking is auto-started only for VGs selected by this list.
# The rules are the same as those for auto_activation_volume_list.
# This configuration option does not have a default value defined.
}
# Configuration option metadata/check_pv_device_sizes.
# Check device sizes are not smaller than corresponding PV sizes.
# If device size is less than corresponding PV size found in metadata,
# there is always a risk of data loss. If this option is set, then LVM
# issues a warning message each time it finds that the device size is
# less than corresponding PV size. You should not disable this unless
# you are absolutely sure about what you are doing!
# This configuration option is advanced.
# This configuration option has an automatic default value.
# check_pv_device_sizes = 1
# Configuration option metadata/record_lvs_history.
# When enabled, LVM keeps history records about removed LVs in
# metadata. The information that is recorded in metadata for
# historical LVs is reduced when compared to original
# information kept in metadata for live LVs. Currently, this
# feature is supported for thin and thin snapshot LVs only.
# This configuration option has an automatic default value.
# record_lvs_history = 0
# Configuration option metadata/lvs_history_retention_time.
# Retention time in seconds after which a record about individual
# historical logical volume is automatically destroyed.
# A value of 0 disables this feature.
# This configuration option has an automatic default value.
# lvs_history_retention_time = 0
# Configuration option metadata/pvmetadatacopies.
# Number of copies of metadata to store on each PV.
# The --pvmetadatacopies option overrides this setting.
#
# Accepted values:
# 2
# Two copies of the VG metadata are stored on the PV, one at the
# front of the PV, and one at the end.
# 1
# One copy of VG metadata is stored at the front of the PV.
# 0
# No copies of VG metadata are stored on the PV. This may be
# useful for VGs containing large numbers of PVs.
#
# This configuration option is advanced.
# This configuration option has an automatic default value.
# pvmetadatacopies = 1
# Configuration option metadata/vgmetadatacopies.
# Number of copies of metadata to maintain for each VG.
# The --vgmetadatacopies option overrides this setting.
# If set to a non-zero value, LVM automatically chooses which of the
# available metadata areas to use to achieve the requested number of
# copies of the VG metadata. If you set a value larger than the the
# total number of metadata areas available, then metadata is stored in
# them all. The value 0 (unmanaged) disables this automatic management
# and allows you to control which metadata areas are used at the
# individual PV level using pvchange --metadataignore y|n.
# This configuration option has an automatic default value.
# vgmetadatacopies = 0
# Configuration option metadata/pvmetadatasize.
# The default size of the metadata area in units of 512 byte sectors.
# The metadata area begins at an offset of the page size from the start
# of the device. The first PE is by default at 1 MiB from the start of
# the device. The space between these is the default metadata area size.
# The actual size of the metadata area may be larger than what is set
# here due to default_data_alignment making the first PE a MiB multiple.
# The metadata area begins with a 512 byte header and is followed by a
# circular buffer used for VG metadata text. The maximum size of the VG
# metadata is about half the size of the metadata buffer. VGs with large
# numbers of PVs or LVs, or VGs containing complex LV structures, may
need
# additional space for VG metadata. The --metadatasize option overrides
# this setting.
# This configuration option does not have a default value defined.
# This configuration option has an automatic default value.
# Configuration option metadata/pvmetadataignore.
# Ignore metadata areas on a new PV.
# The --metadataignore option overrides this setting.
# If metadata areas on a PV are ignored, LVM will not store metadata
# in them.
# This configuration option is advanced.
# This configuration option has an automatic default value.
# pvmetadataignore = 0
# Configuration option metadata/stripesize.
# This configuration option is advanced.
# This configuration option has an automatic default value.
# stripesize = 64
# Configuration option report/output_format.
# Format of LVM command's report output.
# If there is more than one report per command, then the format
# is applied for all reports. You can also change output format
# directly on command line using --reportformat option which
# has precedence over log/output_format setting.
# Accepted values:
# basic
# Original format with columns and rows. If there is more than
# one report per command, each report is prefixed with report's
# name for identification.
# json
# JSON format.
# This configuration option has an automatic default value.
# output_format = "basic"
# Configuration option report/compact_output.
# Do not print empty values for all report fields.
# If enabled, all fields that don't have a value set for any of the
# rows reported are skipped and not printed. Compact output is
# applicable only if report/buffered is enabled. If you need to
# compact only specified fields, use compact_output=0 and define
# report/compact_output_cols configuration setting instead.
# This configuration option has an automatic default value.
# compact_output = 0
# Configuration option report/compact_output_cols.
# Do not print empty values for specified report fields.
# If defined, specified fields that don't have a value set for any
# of the rows reported are skipped and not printed. Compact output
# is applicable only if report/buffered is enabled. If you need to
# compact all fields, use compact_output=1 instead in which case
# the compact_output_cols setting is then ignored.
# This configuration option has an automatic default value.
# compact_output_cols = ""
# Configuration option report/aligned.
# Align columns in report output.
# This configuration option has an automatic default value.
# aligned = 1
# Configuration option report/buffered.
# Buffer report output.
# When buffered reporting is used, the report's content is appended
# incrementally to include each object being reported until the report
# is flushed to output which normally happens at the end of command
# execution. Otherwise, if buffering is not used, each object is
# reported as soon as its processing is finished.
# This configuration option has an automatic default value.
# buffered = 1
# Configuration option report/headings.
# Show headings for columns on report.
# This configuration option has an automatic default value.
# headings = 1
# Configuration option report/separator.
# A separator to use on report after each field.
# This configuration option has an automatic default value.
# separator = " "
# Configuration option report/list_item_separator.
# A separator to use for list items when reported.
# This configuration option has an automatic default value.
# list_item_separator = ","
# Configuration option report/prefixes.
# Use a field name prefix for each field reported.
# This configuration option has an automatic default value.
# prefixes = 0
# Configuration option report/quoted.
# Quote field values when using field name prefixes.
# This configuration option has an automatic default value.
# quoted = 1
# Configuration option report/columns_as_rows.
# Output each column as a row.
# If set, this also implies report/prefixes=1.
# This configuration option has an automatic default value.
# columns_as_rows = 0
# Configuration option report/binary_values_as_numeric.
# Use binary values 0 or 1 instead of descriptive literal values.
# For columns that have exactly two valid values to report
# (not counting the 'unknown' value which denotes that the
# value could not be determined).
# This configuration option has an automatic default value.
# binary_values_as_numeric = 0
# Configuration option report/time_format.
# Set time format for fields reporting time values.
# Format specification is a string which may contain special character
# sequences and ordinary character sequences. Ordinary character
# sequences are copied verbatim. Each special character sequence is
# introduced by the '%' character and such sequence is then
# substituted with a value as described below.
#
# Accepted values:
# %a
# The abbreviated name of the day of the week according to the
# current locale.
# %A
# The full name of the day of the week according to the current
# locale.
# %b
# The abbreviated month name according to the current locale.
# %B
# The full month name according to the current locale.
# %c
# The preferred date and time representation for the current
# locale (alt E)
# %C
# The century number (year/100) as a 2-digit integer. (alt E)
# %d
# The day of the month as a decimal number (range 01 to 31).
# (alt O)
# %D
# Equivalent to %m/%d/%y. (For Americans only. Americans should
# note that in other countries%d/%m/%y is rather common. This
# means that in international context this format is ambiguous and
# should not be used.
# %e
# Like %d, the day of the month as a decimal number, but a leading
# zero is replaced by a space. (alt O)
# %E
# Modifier: use alternative local-dependent representation if
# available.
# %F
# Equivalent to %Y-%m-%d (the ISO 8601 date format).
# %G
# The ISO 8601 week-based year with century as adecimal number.
# The 4-digit year corresponding to the ISO week number (see %V).
# This has the same format and value as %Y, except that if the
# ISO week number belongs to the previous or next year, that year
# is used instead.
# %g
# Like %G, but without century, that is, with a 2-digit year
# (00-99).
# %h
# Equivalent to %b.
# %H
# The hour as a decimal number using a 24-hour clock
# (range 00 to 23). (alt O)
# %I
# The hour as a decimal number using a 12-hour clock
# (range 01 to 12). (alt O)
# %j
# The day of the year as a decimal number (range 001 to 366).
# %k
# The hour (24-hour clock) as a decimal number (range 0 to 23);
# single digits are preceded by a blank. (See also %H.)
# %l
# The hour (12-hour clock) as a decimal number (range 1 to 12);
# single digits are preceded by a blank. (See also %I.)
# %m
# The month as a decimal number (range 01 to 12). (alt O)
# %M
# The minute as a decimal number (range 00 to 59). (alt O)
# %O
# Modifier: use alternative numeric symbols.
# %p
# Either "AM" or "PM" according to the given time value,
# or the corresponding strings for the current locale. Noon is
# treated as "PM" and midnight as "AM".
# %P
# Like %p but in lowercase: "am" or "pm" or a corresponding
# string for the current locale.
# %r
# The time in a.m. or p.m. notation. In the POSIX locale this is
# equivalent to %I:%M:%S %p.
# %R
# The time in 24-hour notation (%H:%M). For a version including
# the seconds, see %T below.
# %s
# The number of seconds since the Epoch,
# 1970-01-01 00:00:00 +0000 (UTC)
# %S
# The second as a decimal number (range 00 to 60). (The range is
# up to 60 to allow for occasional leap seconds.) (alt O)
# %t
# A tab character.
# %T
# The time in 24-hour notation (%H:%M:%S).
# %u
# The day of the week as a decimal, range 1 to 7, Monday being 1.
# See also %w. (alt O)
# %U
# The week number of the current year as a decimal number,
# range 00 to 53, starting with the first Sunday as the first
# day of week 01. See also %V and %W. (alt O)
# %V
# The ISO 8601 week number of the current year as a decimal number,
# range 01 to 53, where week 1 is the first week that has at least
# 4 days in the new year. See also %U and %W. (alt O)
# %w
# The day of the week as a decimal, range 0 to 6, Sunday being 0.
# See also %u. (alt O)
# %W
# The week number of the current year as a decimal number,
# range 00 to 53, starting with the first Monday as the first day
# of week 01. (alt O)
# %x
# The preferred date representation for the current locale without
# the time. (alt E)
# %X
# The preferred time representation for the current locale without
# the date. (alt E)
# %y
# The year as a decimal number without a century (range 00 to 99).
# (alt E, alt O)
# %Y
# The year as a decimal number including the century. (alt E)
# %z
# The +hhmm or -hhmm numeric timezone (that is, the hour and minute
# offset from UTC).
# %Z
# The timezone name or abbreviation.
# %%
# A literal '%' character.
#
# This configuration option has an automatic default value.
# time_format = "%Y-%m-%d %T %z"
# Configuration option report/devtypes_sort.
# List of columns to sort by when reporting 'lvm devtypes' command.
# See 'lvm devtypes -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# devtypes_sort = "devtype_name"
# Configuration option report/devtypes_cols.
# List of columns to report for 'lvm devtypes' command.
# See 'lvm devtypes -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# devtypes_cols =
"devtype_name,devtype_max_partitions,devtype_description"
# Configuration option report/devtypes_cols_verbose.
# List of columns to report for 'lvm devtypes' command in verbose mode.
# See 'lvm devtypes -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# devtypes_cols_verbose =
"devtype_name,devtype_max_partitions,devtype_description"
# Configuration option report/lvs_sort.
# List of columns to sort by when reporting 'lvs' command.
# See 'lvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# lvs_sort = "vg_name,lv_name"
# Configuration option report/lvs_cols.
# List of columns to report for 'lvs' command.
# See 'lvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# lvs_cols =
"lv_name,vg_name,lv_attr,lv_size,pool_lv,origin,data_percent,metadata_percent,move_pv,mirror_log,copy_percent,convert_lv"
# Configuration option report/lvs_cols_verbose.
# List of columns to report for 'lvs' command in verbose mode.
# See 'lvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# lvs_cols_verbose =
"lv_name,vg_name,seg_count,lv_attr,lv_size,lv_major,lv_minor,lv_kernel_major,lv_kernel_minor,pool_lv,origin,data_percent,metadata_percent,move_pv,copy_percent,mirror_log,convert_lv,lv_uuid,lv_profile"
# Configuration option report/vgs_sort.
# List of columns to sort by when reporting 'vgs' command.
# See 'vgs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# vgs_sort = "vg_name"
# Configuration option report/vgs_cols.
# List of columns to report for 'vgs' command.
# See 'vgs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# vgs_cols =
"vg_name,pv_count,lv_count,snap_count,vg_attr,vg_size,vg_free"
# Configuration option report/vgs_cols_verbose.
# List of columns to report for 'vgs' command in verbose mode.
# See 'vgs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# vgs_cols_verbose =
"vg_name,vg_attr,vg_extent_size,pv_count,lv_count,snap_count,vg_size,vg_free,vg_uuid,vg_profile"
# Configuration option report/pvs_sort.
# List of columns to sort by when reporting 'pvs' command.
# See 'pvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvs_sort = "pv_name"
# Configuration option report/pvs_cols.
# List of columns to report for 'pvs' command.
# See 'pvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvs_cols = "pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free"
# Configuration option report/pvs_cols_verbose.
# List of columns to report for 'pvs' command in verbose mode.
# See 'pvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvs_cols_verbose =
"pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,dev_size,pv_uuid"
# Configuration option report/segs_sort.
# List of columns to sort by when reporting 'lvs --segments' command.
# See 'lvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# segs_sort = "vg_name,lv_name,seg_start"
# Configuration option report/segs_cols.
# List of columns to report for 'lvs --segments' command.
# See 'lvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# segs_cols = "lv_name,vg_name,lv_attr,stripes,segtype,seg_size"
# Configuration option report/segs_cols_verbose.
# List of columns to report for 'lvs --segments' command in verbose
mode.
# See 'lvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# segs_cols_verbose =
"lv_name,vg_name,lv_attr,seg_start,seg_size,stripes,segtype,stripesize,chunksize"
# Configuration option report/pvsegs_sort.
# List of columns to sort by when reporting 'pvs --segments' command.
# See 'pvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvsegs_sort = "pv_name,pvseg_start"
# Configuration option report/pvsegs_cols.
# List of columns to sort by when reporting 'pvs --segments' command.
# See 'pvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvsegs_cols =
"pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,pvseg_start,pvseg_size"
# Configuration option report/pvsegs_cols_verbose.
# List of columns to sort by when reporting 'pvs --segments' command in
verbose mode.
# See 'pvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvsegs_cols_verbose =
"pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,pvseg_start,pvseg_size,lv_name,seg_start_pe,segtype,seg_pe_ranges"
# Configuration option report/vgs_cols_full.
# List of columns to report for lvm fullreport's 'vgs' subreport.
# See 'vgs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# vgs_cols_full = "vg_all"
# Configuration option report/pvs_cols_full.
# List of columns to report for lvm fullreport's 'vgs' subreport.
# See 'pvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvs_cols_full = "pv_all"
# Configuration option report/lvs_cols_full.
# List of columns to report for lvm fullreport's 'lvs' subreport.
# See 'lvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# lvs_cols_full = "lv_all"
# Configuration option report/pvsegs_cols_full.
# List of columns to report for lvm fullreport's 'pvseg' subreport.
# See 'pvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvsegs_cols_full = "pvseg_all,pv_uuid,lv_uuid"
# Configuration option report/segs_cols_full.
# List of columns to report for lvm fullreport's 'seg' subreport.
# See 'lvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# segs_cols_full = "seg_all,lv_uuid"
# Configuration option report/vgs_sort_full.
# List of columns to sort by when reporting lvm fullreport's 'vgs'
subreport.
# See 'vgs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# vgs_sort_full = "vg_name"
# Configuration option report/pvs_sort_full.
# List of columns to sort by when reporting lvm fullreport's 'vgs'
subreport.
# See 'pvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvs_sort_full = "pv_name"
# Configuration option report/lvs_sort_full.
# List of columns to sort by when reporting lvm fullreport's 'lvs'
subreport.
# See 'lvs -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# lvs_sort_full = "vg_name,lv_name"
# Configuration option report/pvsegs_sort_full.
# List of columns to sort by when reporting for lvm fullreport's
'pvseg' subreport.
# See 'pvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# pvsegs_sort_full = "pv_uuid,pvseg_start"
# Configuration option report/segs_sort_full.
# List of columns to sort by when reporting lvm fullreport's 'seg'
subreport.
# See 'lvs --segments -o help' for the list of possible fields.
# This configuration option has an automatic default value.
# segs_sort_full = "lv_uuid,seg_start"
# Configuration option report/mark_hidden_devices.
# Use brackets [] to mark hidden devices.
# This configuration option has an automatic default value.
# mark_hidden_devices = 1
# Configuration option report/two_word_unknown_device.
# Use the two words 'unknown device' in place of '[unknown]'.
# This is displayed when the device for a PV is not known.
# This configuration option has an automatic default value.
# two_word_unknown_device = 0
dmeventd {
# Configuration option dmeventd/mirror_library.
# The library dmeventd uses when monitoring a mirror device.
# libdevmapper-event-lvm2mirror.so attempts to recover from
# failures. It removes failed devices from a volume group and
# reconfigures a mirror as necessary. If no mirror library is
# provided, mirrors are not monitored through dmeventd.
mirror_library = "libdevmapper-event-lvm2mirror.so"
# Configuration option dmeventd/raid_library.
# This configuration option has an automatic default value.
# raid_library = "libdevmapper-event-lvm2raid.so"
# Configuration option dmeventd/snapshot_library.
# The library dmeventd uses when monitoring a snapshot device.
# libdevmapper-event-lvm2snapshot.so monitors the filling of snapshots
# and emits a warning through syslog when the usage exceeds 80%. The
# warning is repeated when 85%, 90% and 95% of the snapshot is filled.
snapshot_library = "libdevmapper-event-lvm2snapshot.so"
# Configuration option dmeventd/thin_library.
# The library dmeventd uses when monitoring a thin device.
# libdevmapper-event-lvm2thin.so monitors the filling of a pool
# and emits a warning through syslog when the usage exceeds 80%. The
# warning is repeated when 85%, 90% and 95% of the pool is filled.
thin_library = "libdevmapper-event-lvm2thin.so"
# Configuration option dmeventd/thin_command.
# The plugin runs command with each 5% increment when thin-pool data
volume
# or metadata volume gets above 50%.
# Command which starts with 'lvm ' prefix is internal lvm command.
# You can write your own handler to customise behaviour in more details.
# User handler is specified with the full path starting with '/'.
# This configuration option has an automatic default value.
# thin_command = "lvm lvextend --use-policies"
# Configuration option dmeventd/vdo_library.
# The library dmeventd uses when monitoring a VDO pool device.
# libdevmapper-event-lvm2vdo.so monitors the filling of a pool
# and emits a warning through syslog when the usage exceeds 80%. The
# warning is repeated when 85%, 90% and 95% of the pool is filled.
# This configuration option has an automatic default value.
# vdo_library = "libdevmapper-event-lvm2vdo.so"
# Configuration option dmeventd/vdo_command.
# The plugin runs command with each 5% increment when VDO pool volume
# gets above 50%.
# Command which starts with 'lvm ' prefix is internal lvm command.
# You can write your own handler to customise behaviour in more details.
# User handler is specified with the full path starting with '/'.
# This configuration option has an automatic default value.
# vdo_command = "lvm lvextend --use-policies"
# Configuration option dmeventd/executable.
# The full path to the dmeventd binary.
# This configuration option has an automatic default value.
# executable = "/sbin/dmeventd"
}
# Configuration option tags/hosttags.
# Create a host tag using the machine name.
# The machine name is nodename returned by uname(2).
# This configuration option has an automatic default value.
# hosttags = 0
# Configuration section tags/<tag>.
# Replace this subsection name with a custom tag name.
# Multiple subsections like this can be created. The '@' prefix for
# tags is optional. This subsection can contain host_list, which is a
# list of machine names. If the name of the local machine is found in
# host_list, then the name of this subsection is used as a tag and is
# applied to the local machine as a 'host tag'. If this subsection is
# empty (has no host_list), then the subsection name is always applied
# as a 'host tag'.
#
# Example
# The host tag foo is given to all hosts, and the host tag
# bar is given to the hosts named machine1 and machine2.
# tags { foo { } bar { host_list = [ "machine1", "machine2" ] } }
#
# This configuration section has variable name.
# This configuration section has an automatic default value.
# tag {
# Configuration option tags/<tag>/host_list.
# A list of machine names.
# These machine names are compared to the nodename returned
# by uname(2). If the local machine name matches an entry in
# this list, the name of the subsection is applied to the
# machine as a 'host tag'.
# This configuration option does not have a default value
defined.
# }

-- no debconf information

Bug#939092: lvm2: Spurious(?) failure of lvm2-pvscan systemd unit

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