1588 lines
68 KiB
Plaintext
1588 lines
68 KiB
Plaintext
# This is an example configuration file for the LVM2 system.
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# It contains the default settings that would be used if there was no
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# /etc/lvm/lvm.conf file.
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#
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# Refer to 'man lvm.conf' for further information including the file layout.
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#
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# To put this file in a different directory and override /etc/lvm set
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# the environment variable LVM_SYSTEM_DIR before running the tools.
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#
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# N.B. Take care that each setting only appears once if uncommenting
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# example settings in this file.
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# Configuration section config.
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# How LVM configuration settings are handled.
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config {
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# Configuration option config/checks.
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# If enabled, any LVM configuration mismatch is reported.
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# This implies checking that the configuration key is understood
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# by LVM and that the value of the key is the proper type.
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# If disabled, any configuration mismatch is ignored and the default
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# value is used without any warning (a message about the
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# configuration key not being found is issued in verbose mode only).
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checks = 1
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# Configuration option config/abort_on_errors.
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# Abort the LVM process if a configuration mismatch is found.
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abort_on_errors = 0
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# Configuration option config/profile_dir.
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# Directory where LVM looks for configuration profiles.
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profile_dir = "/etc/lvm/profile"
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}
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# Configuration section devices.
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# How LVM uses block devices.
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devices {
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# Configuration option devices/dir.
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# Directory in which to create volume group device nodes.
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# Commands also accept this as a prefix on volume group names.
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# This configuration option is advanced.
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dir = "/dev"
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# Configuration option devices/scan.
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# Directories containing device nodes to use with LVM.
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# This configuration option is advanced.
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scan = [ "/dev" ]
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# Configuration option devices/obtain_device_list_from_udev.
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# Obtain the list of available devices from udev.
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# This avoids opening or using any inapplicable non-block
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# devices or subdirectories found in the udev directory.
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# Any device node or symlink not managed by udev in the udev
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# directory is ignored. This setting applies only to the
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# udev-managed device directory; other directories will be
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# scanned fully. LVM needs to be compiled with udev support
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# for this setting to apply.
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obtain_device_list_from_udev = 1
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# Configuration option devices/external_device_info_source.
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# Select an external device information source.
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# Some information may already be available in the system and
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# LVM can use this information to determine the exact type
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# or use of devices it processes. Using an existing external
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# device information source can speed up device processing
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# as LVM does not need to run its own native routines to acquire
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# this information. For example, this information is used to
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# drive LVM filtering like MD component detection, multipath
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# component detection, partition detection and others.
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# Possible options are: none, udev.
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# none - No external device information source is used.
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# udev - Reuse existing udev database records. Applicable
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# only if LVM is compiled with udev support.
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external_device_info_source = "none"
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# Configuration option devices/preferred_names.
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# Select which path name to display for a block device.
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# If multiple path names exist for a block device,
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# and LVM needs to display a name for the device,
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# the path names are matched against each item in
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# this list of regular expressions. The first match is used.
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# Try to avoid using undescriptive /dev/dm-N names, if present.
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# If no preferred name matches, or if preferred_names are not
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# defined, built-in rules are used until one produces a preference.
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# Rule 1 checks path prefixes and gives preference in this order:
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# /dev/mapper, /dev/disk, /dev/dm-*, /dev/block (/dev from devices/dev)
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# Rule 2 prefers the path with the least slashes.
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# Rule 3 prefers a symlink.
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# Rule 4 prefers the path with least value in lexicographical order.
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# Example:
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# preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath", "^/dev/[hs]d" ]
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# This configuration option does not have a default value defined.
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# preferred_names=[]
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# Configuration option devices/filter.
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# Limit the block devices that are used by LVM commands.
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# This is a list of regular expressions used to accept or
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# reject block device path names. Each regex is delimited
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# by a vertical bar '|' (or any character) and is preceded
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# by 'a' to accept the path, or by 'r' to reject the path.
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# The first regex in the list to match the path is used,
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# producing the 'a' or 'r' result for the device.
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# When multiple path names exist for a block device, if any
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# path name matches an 'a' pattern before an 'r' pattern,
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# then the device is accepted. If all the path names match
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# an 'r' pattern first, then the device is rejected.
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# Unmatching path names do not affect the accept or reject
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# decision. If no path names for a device match a pattern,
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# then the device is accepted.
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# Be careful mixing 'a' and 'r' patterns, as the combination
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# might produce unexpected results (test any changes.)
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# Run vgscan after changing the filter to regenerate the cache.
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# See the use_lvmetad comment for a special case regarding filters.
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# Example:
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# Accept every block device.
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# filter = [ "a|.*/|" ]
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# Example:
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# Reject the cdrom drive.
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# filter = [ "r|/dev/cdrom|" ]
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# Example:
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# Work with just loopback devices, e.g. for testing.
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# filter = [ "a|loop|", "r|.*|" ]
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# Example:
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# Accept all loop devices and ide drives except hdc.
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# filter = [ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]
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# Example:
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# Use anchors to be very specific.
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# filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
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# This configuration option does not have a default value defined.
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# filter = []
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# Configuration option devices/global_filter.
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# Limit the block devices that are used by LVM system components.
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# Because devices/filter may be overridden from the command line,
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# it is not suitable for system-wide device filtering, e.g. udev
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# and lvmetad. Use global_filter to hide devices from these LVM
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# system components. The syntax is the same as devices/filter.
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# Devices rejected by global_filter are not opened by LVM.
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# This configuration option does not have a default value defined.
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# global_filter = []
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# Configuration option devices/cache_dir.
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# Directory in which to store the device cache file.
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# The results of filtering are cached on disk to avoid
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# rescanning dud devices (which can take a very long time).
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# By default this cache is stored in a file named .cache.
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# It is safe to delete this file; the tools regenerate it.
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# If obtain_device_list_from_udev is enabled, the list of devices
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# is obtained from udev and any existing .cache file is removed.
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cache_dir = "/etc/lvm/cache"
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# Configuration option devices/cache_file_prefix.
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# A prefix used before the .cache file name. See devices/cache_dir.
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cache_file_prefix = ""
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# Configuration option devices/write_cache_state.
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# Enable/disable writing the cache file. See devices/cache_dir.
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write_cache_state = 1
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# Configuration option devices/types.
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# List of additional acceptable block device types.
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# These are of device type names from /proc/devices,
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# followed by the maximum number of partitions.
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# Example:
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# types = [ "fd", 16 ]
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# This configuration option is advanced.
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# This configuration option does not have a default value defined.
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# types = []
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# Configuration option devices/sysfs_scan.
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# Restrict device scanning to block devices appearing in sysfs.
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# This is a quick way of filtering out block devices that are
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# not present on the system. sysfs must be part of the kernel
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# and mounted.)
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sysfs_scan = 1
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# Configuration option devices/multipath_component_detection.
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# Ignore devices that are components of DM multipath devices.
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multipath_component_detection = 1
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# Configuration option devices/md_component_detection.
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# Ignore devices that are components of software RAID (md) devices.
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md_component_detection = 1
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# Configuration option devices/fw_raid_component_detection.
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# Ignore devices that are components of firmware RAID devices.
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# LVM must use an external_device_info_source other than none
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# for this detection to execute.
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fw_raid_component_detection = 0
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# Configuration option devices/md_chunk_alignment.
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# Align PV data blocks with md device's stripe-width.
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# This applies if a PV is placed directly on an md device.
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md_chunk_alignment = 1
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# Configuration option devices/default_data_alignment.
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# Default alignment of the start of a PV data area in MB.
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# If set to 0, a value of 64KB will be used.
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# Set to 1 for 1MiB, 2 for 2MiB, etc.
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# default_data_alignment = 1
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# Configuration option devices/data_alignment_detection.
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# Detect PV data alignment based on sysfs device information.
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# The start of a PV data area will be a multiple of
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# minimum_io_size or optimal_io_size exposed in sysfs.
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# minimum_io_size is the smallest request the device can perform
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# without incurring a read-modify-write penalty, e.g. MD chunk size.
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# optimal_io_size is the device's preferred unit of receiving I/O,
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# e.g. MD stripe width.
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# minimum_io_size is used if optimal_io_size is undefined (0).
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# If md_chunk_alignment is enabled, that detects the optimal_io_size.
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# This setting takes precedence over md_chunk_alignment.
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data_alignment_detection = 1
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# Configuration option devices/data_alignment.
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# Alignment of the start of a PV data area in KB.
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# If a PV is placed directly on an md device and
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# md_chunk_alignment or data_alignment_detection are enabled,
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# then this setting is ignored. Otherwise, md_chunk_alignment
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# and data_alignment_detection are disabled if this is set.
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# Set to 0 to use the default alignment or the page size, if larger.
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data_alignment = 0
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# Configuration option devices/data_alignment_offset_detection.
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# Detect PV data alignment offset based on sysfs device information.
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# The start of a PV aligned data area will be shifted by the
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# alignment_offset exposed in sysfs. This offset is often 0, but
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# may be non-zero. Certain 4KB sector drives that compensate for
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# windows partitioning will have an alignment_offset of 3584 bytes
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# (sector 7 is the lowest aligned logical block, the 4KB sectors start
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# at LBA -1, and consequently sector 63 is aligned on a 4KB boundary).
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# pvcreate --dataalignmentoffset will skip this detection.
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data_alignment_offset_detection = 1
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# Configuration option devices/ignore_suspended_devices.
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# Ignore DM devices that have I/O suspended while scanning devices.
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# Otherwise, LVM waits for a suspended device to become accessible.
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# This should only be needed in recovery situations.
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ignore_suspended_devices = 0
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# Configuration option devices/ignore_lvm_mirrors.
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# Do not scan 'mirror' LVs to avoid possible deadlocks.
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# This avoids possible deadlocks when using the 'mirror'
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# segment type. This setting determines whether logical volumes
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# using the 'mirror' segment type are scanned for LVM labels.
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# This affects the ability of mirrors to be used as physical volumes.
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# If this setting is enabled, it becomes impossible to create VGs
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# on top of mirror LVs, i.e. to stack VGs on mirror LVs.
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# If this setting is disabled, allowing mirror LVs to be scanned,
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# it may cause LVM processes and I/O to the mirror to become blocked.
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# This is due to the way that the mirror segment type handles failures.
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# In order for the hang to occur, an LVM command must be run just after
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# a failure and before the automatic LVM repair process takes place,
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# or there must be failures in multiple mirrors in the same VG at the
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# same time with write failures occurring moments before a scan of the
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# mirror's labels.
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# The 'mirror' scanning problems do not apply to LVM RAID types like
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# 'raid1' which handle failures in a different way, making them a
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# better choice for VG stacking.
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ignore_lvm_mirrors = 1
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# Configuration option devices/disable_after_error_count.
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# Number of I/O errors after which a device is skipped.
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# During each LVM operation, errors received from each device
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# are counted. If the counter of a device exceeds the limit set
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# here, no further I/O is sent to that device for the remainder
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# of the operation.
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# Setting this to 0 disables the counters altogether.
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disable_after_error_count = 0
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# Configuration option devices/require_restorefile_with_uuid.
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# Allow use of pvcreate --uuid without requiring --restorefile.
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require_restorefile_with_uuid = 1
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# Configuration option devices/pv_min_size.
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# Minimum size (in KB) of block devices which can be used as PVs.
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# In a clustered environment all nodes must use the same value.
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# Any value smaller than 512KB is ignored. The previous built-in
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# value was 512.
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pv_min_size = 2048
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# Configuration option devices/issue_discards.
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# Issue discards to PVs that are no longer used by an LV.
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# Discards are sent to an LV's underlying physical volumes when
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# the LV is no longer using the physical volumes' space, e.g.
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# lvremove, lvreduce. Discards inform the storage that a region
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# is no longer used. Storage that supports discards advertise
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# the protocol-specific way discards should be issued by the
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# kernel (TRIM, UNMAP, or WRITE SAME with UNMAP bit set).
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# Not all storage will support or benefit from discards, but SSDs
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# and thinly provisioned LUNs generally do. If enabled, discards
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# will only be issued if both the storage and kernel provide support.
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issue_discards = 0
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}
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# Configuration section allocation.
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# How LVM selects free space for Logical Volumes.
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allocation {
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# Configuration option allocation/cling_tag_list.
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# Advise LVM which PVs to use when searching for new space.
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# When searching for free space to extend an LV, the 'cling'
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# allocation policy will choose space on the same PVs as the last
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# segment of the existing LV. If there is insufficient space and a
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# list of tags is defined here, it will check whether any of them are
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# attached to the PVs concerned and then seek to match those PV tags
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# between existing extents and new extents.
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# Example:
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# Use the special tag "@*" as a wildcard to match any PV tag.
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# cling_tag_list = [ "@*" ]
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# Example:
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# LVs are mirrored between two sites within a single VG.
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# PVs are tagged with either @site1 or @site2 to indicate where
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# they are situated.
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# cling_tag_list = [ "@site1", "@site2" ]
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# This configuration option does not have a default value defined.
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# cling_tag_list = []
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# Configuration option allocation/maximise_cling.
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# Use a previous allocation algorithm.
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# Changes made in version 2.02.85 extended the reach of the 'cling'
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# policies to detect more situations where data can be grouped onto
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# the same disks. This setting can be used to disable the changes
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# and revert to the previous algorithm.
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maximise_cling = 1
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# Configuration option allocation/use_blkid_wiping.
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# Use blkid to detect existing signatures on new PVs and LVs.
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# The blkid library can detect more signatures than the
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# native LVM detection code, but may take longer.
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# LVM needs to be compiled with blkid wiping support for
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# this setting to apply.
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# LVM native detection code is currently able to recognize:
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# MD device signatures, swap signature, and LUKS signatures.
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# To see the list of signatures recognized by blkid, check the
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# output of the 'blkid -k' command.
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use_blkid_wiping = 1
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# Configuration option allocation/wipe_signatures_when_zeroing_new_lvs.
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# Look for and erase any signatures while zeroing a new LV.
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# Zeroing is controlled by the -Z/--zero option, and if not
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# specified, zeroing is used by default if possible.
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# Zeroing simply overwrites the first 4 KiB of a new LV
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# with zeroes and does no signature detection or wiping.
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# Signature wiping goes beyond zeroing and detects exact
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# types and positions of signatures within the whole LV.
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# It provides a cleaner LV after creation as all known
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# signatures are wiped. The LV is not claimed incorrectly
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# by other tools because of old signatures from previous use.
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# The number of signatures that LVM can detect depends on the
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# detection code that is selected (see use_blkid_wiping.)
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# Wiping each detected signature must be confirmed.
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# The command line option -W/--wipesignatures takes precedence
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# over this setting.
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# When this setting is disabled, signatures on new LVs are
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# not detected or erased unless the -W/--wipesignatures y
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# option is used directly.
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wipe_signatures_when_zeroing_new_lvs = 1
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# Configuration option allocation/mirror_logs_require_separate_pvs.
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# Mirror logs and images will always use different PVs.
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# The default setting changed in version 2.02.85.
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mirror_logs_require_separate_pvs = 0
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# Configuration option allocation/cache_pool_metadata_require_separate_pvs.
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# Cache pool metadata and data will always use different PVs.
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cache_pool_metadata_require_separate_pvs = 0
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# Configuration option allocation/cache_pool_cachemode.
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# The default cache mode used for new cache pools.
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# Possible options are: writethrough, writeback.
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# writethrough - Data blocks are immediately written from
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# the cache to disk.
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# writeback - Data blocks are written from the cache back
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# to disk after some delay to improve performance.
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# cache_pool_cachemode = "writethrough"
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# Configuration option allocation/cache_pool_chunk_size.
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# The minimal chunk size (in kiB) for cache pool volumes.
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# Using a chunk_size that is too large can result in wasteful
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# use of the cache, where small reads and writes can cause
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# large sections of an LV to be mapped into the cache. However,
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# choosing a chunk_size that is too small can result in more
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# overhead trying to manage the numerous chunks that become mapped
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# into the cache. The former is more of a problem than the latter
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# in most cases, so we default to a value that is on the smaller
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# end of the spectrum. Supported values range from 32(kiB) to
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# 1048576 in multiples of 32.
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# This configuration option does not have a default value defined.
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# cache_pool_chunk_size = 128
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# Configuration option allocation/thin_pool_metadata_require_separate_pvs.
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# Thin pool metdata and data will always use different PVs.
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thin_pool_metadata_require_separate_pvs = 0
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# Configuration option allocation/thin_pool_zero.
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# Thin pool data chunks are zeroed before they are first used.
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# Zeroing with a larger thin pool chunk size reduces performance.
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# thin_pool_zero = 1
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# Configuration option allocation/thin_pool_discards.
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# The discards behaviour of thin pool volumes.
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# Possible options are: ignore, nopassdown, passdown.
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# thin_pool_discards = "passdown"
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# Configuration option allocation/thin_pool_chunk_size_policy.
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# The chunk size calculation policy for thin pool volumes.
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# Possible options are: generic, performance.
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# generic - If thin_pool_chunk_size is defined, use it.
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# Otherwise, calculate the chunk size based on estimation and
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# device hints exposed in sysfs - the minimum_io_size.
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# The chunk size is always at least 64KiB.
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# performance - If thin_pool_chunk_size is defined, use it.
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# Otherwise, calculate the chunk size for performance based on
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# device hints exposed in sysfs - the optimal_io_size.
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# The chunk size is always at least 512KiB.
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# thin_pool_chunk_size_policy = "generic"
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# Configuration option allocation/thin_pool_chunk_size.
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# The minimal chunk size (in KB) for thin pool volumes.
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# Larger chunk sizes may improve performance for plain
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# thin volumes, however using them for snapshot volumes
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# is less efficient, as it consumes more space and takes
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# extra time for copying. When unset, lvm tries to estimate
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# chunk size starting from 64KB. Supported values are in
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# the range 64 to 1048576.
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# This configuration option does not have a default value defined.
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# thin_pool_chunk_size = 128
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# Configuration option allocation/physical_extent_size.
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# Default physical extent size to use for new VGs (in KB).
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# physical_extent_size = 4096
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}
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# Configuration section log.
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# How LVM log information is reported.
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log {
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# 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.
|
|
# file = ""
|
|
|
|
# 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, activation, allocation,
|
|
# lvmetad, metadata, cache, locking, lvmpolld.
|
|
# Use "all" to see everything.
|
|
debug_classes = ["memory", "devices", "activation", "allocation",
|
|
"lvmetad", "metadata", "cache", "locking", "lvmpolld"]
|
|
}
|
|
|
|
# Configuration section backup.
|
|
# How LVM metadata is backed up and archived.
|
|
# In LVM, a 'backup' is a copy of the metadata for the
|
|
# current system, and an 'archive' contains old metadata
|
|
# configurations. They are stored in a human readable
|
|
# text format.
|
|
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
|
|
}
|
|
|
|
# Configuration section shell.
|
|
# Settings for running LVM in shell (readline) mode.
|
|
shell {
|
|
|
|
# Configuration option shell/history_size.
|
|
# Number of lines of history to store in ~/.lvm_history.
|
|
history_size = 100
|
|
}
|
|
|
|
# Configuration section global.
|
|
# Miscellaneous global LVM settings.
|
|
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 = "h"
|
|
|
|
# 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/fallback_to_lvm1.
|
|
# Try running LVM1 tools if LVM cannot communicate with DM.
|
|
# This option only applies to 2.4 kernels and is provided to
|
|
# help switch between device-mapper kernels and LVM1 kernels.
|
|
# The LVM1 tools need to be installed with .lvm1 suffices,
|
|
# e.g. vgscan.lvm1. They will stop working once the lvm2
|
|
# on-disk metadata format is used.
|
|
# fallback_to_lvm1 = 0
|
|
|
|
# Configuration option global/format.
|
|
# The default metadata format that commands should use.
|
|
# "lvm1" or "lvm2".
|
|
# The command line override is -M1 or -M2.
|
|
# format = "lvm2"
|
|
|
|
# Configuration option global/format_libraries.
|
|
# Shared libraries that process different metadata formats.
|
|
# If support for LVM1 metadata was compiled as a shared library use
|
|
# format_libraries = "liblvm2format1.so"
|
|
# This configuration option does not have a default value defined.
|
|
# format_libraries = []
|
|
|
|
# Configuration option global/segment_libraries.
|
|
# This configuration option does not have a default value defined.
|
|
# segment_libraries = []
|
|
|
|
# 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/locking_type.
|
|
# Type of locking to use.
|
|
# Type 0: turns off locking. Warning: this risks metadata
|
|
# corruption if commands run concurrently.
|
|
# Type 1: uses local file-based locking, the standard mode.
|
|
# Type 2: uses the external shared library locking_library.
|
|
# Type 3: uses built-in clustered locking with clvmd.
|
|
# This is incompatible with lvmetad. If use_lvmetad is enabled,
|
|
# lvm prints a warning and disables lvmetad use.
|
|
# Type 4: uses read-only locking which forbids any operations
|
|
# that might change metadata.
|
|
# Type 5: offers dummy locking for tools that do not need any locks.
|
|
# You should not need to set this directly; the tools will select
|
|
# when to use it instead of the configured locking_type.
|
|
# Do not use lvmetad or the kernel device-mapper driver with this
|
|
# locking type. It is used by the --readonly option that offers
|
|
# read-only access to Volume Group metadata that cannot be locked
|
|
# safely because it belongs to an inaccessible domain and might be
|
|
# in use, for example a virtual machine image or a disk that is
|
|
# shared by a clustered machine.
|
|
locking_type = 1
|
|
|
|
# Configuration option global/wait_for_locks.
|
|
# When disabled, fail if a lock request would block.
|
|
wait_for_locks = 1
|
|
|
|
# Configuration option global/fallback_to_clustered_locking.
|
|
# Attempt to use built-in cluster locking if locking_type 2 fails.
|
|
# If using external locking (type 2) and initialisation fails,
|
|
# with this enabled, an attempt will be made to use the built-in
|
|
# clustered locking.
|
|
# If you are using a customised locking_library you should disable this.
|
|
fallback_to_clustered_locking = 1
|
|
|
|
# Configuration option global/fallback_to_local_locking.
|
|
# Use locking_type 1 (local) if locking_type 2 or 3 fail.
|
|
# If an attempt to initialise type 2 or type 3 locking failed,
|
|
# perhaps because cluster components such as clvmd are not
|
|
# running, with this enabled, an attempt will be made to use
|
|
# local file-based locking (type 1). If this succeeds, only
|
|
# commands against local volume groups will proceed.
|
|
# Volume Groups marked as clustered will be ignored.
|
|
fallback_to_local_locking = 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.
|
|
# library_dir = ""
|
|
|
|
# Configuration option global/locking_library.
|
|
# The external locking library to use for locking_type 2.
|
|
# locking_library = "liblvm2clusterlock.so"
|
|
|
|
# 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/detect_internal_vg_cache_corruption.
|
|
# Internal verification of VG structures.
|
|
# Check if CRC matches when a parsed VG is
|
|
# used multiple times. This is useful to catch
|
|
# unexpected changes to cached VG structures.
|
|
# Please only enable for debugging.
|
|
detect_internal_vg_cache_corruption = 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.
|
|
# Possible options are: mirror, raid1.
|
|
# 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 - 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 - 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.
|
|
# The '--type mirror|raid1' option overrides this setting.
|
|
mirror_segtype_default = "raid1"
|
|
|
|
# Configuration option global/raid10_segtype_default.
|
|
# The segment type used by the -i -m combination.
|
|
# 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.
|
|
# Possible options are: raid10, mirror.
|
|
# raid10 - LVM uses MD's RAID10 personality through DM.
|
|
# 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. The 'raid10' option is perferred.
|
|
# The '--type raid10|mirror' option overrides this setting.
|
|
raid10_segtype_default = "raid10"
|
|
|
|
# Configuration option global/sparse_segtype_default.
|
|
# The segment type used by the -V -L combination.
|
|
# The combination of -V and -L options creates a
|
|
# sparse LV. There are two different implementations.
|
|
# Possible options are: snapshot, thin.
|
|
# 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.
|
|
# The '--type snapshot|thin' option overrides this setting.
|
|
sparse_segtype_default = "thin"
|
|
|
|
# Configuration option global/lvdisplay_shows_full_device_path.
|
|
# 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.
|
|
# Enable this option to reinstate the previous format.
|
|
# lvdisplay_shows_full_device_path = 0
|
|
|
|
# Configuration option global/use_lvmetad.
|
|
# Use lvmetad to cache metadata and reduce disk scanning.
|
|
# When enabled (and running), lvmetad provides LVM commands
|
|
# with VG metadata and PV state. LVM commands then avoid
|
|
# reading this information from disks which can be slow.
|
|
# When disabled (or not running), LVM commands fall back to
|
|
# scanning disks to obtain VG metadata.
|
|
# lvmetad is kept updated via udev rules which must be set
|
|
# up for LVM to work correctly. (The udev rules should be
|
|
# installed by default.) Without a proper udev setup, changes
|
|
# in the system's block device configuration will be unknown
|
|
# to LVM, and ignored until a manual 'pvscan --cache' is run.
|
|
# If lvmetad was running while use_lvmetad was disabled,
|
|
# it must be stopped, use_lvmetad enabled, and then started.
|
|
# When using lvmetad, LV activation is switched to an automatic,
|
|
# event-based mode. In this mode, LVs are activated based on
|
|
# incoming udev events that inform lvmetad when PVs appear on
|
|
# the system. When a VG is complete (all PVs present), it is
|
|
# auto-activated. The auto_activation_volume_list setting
|
|
# controls which LVs are auto-activated (all by default.)
|
|
# When lvmetad is updated (automatically by udev events, or
|
|
# directly by pvscan --cache), devices/filter is ignored and
|
|
# all devices are scanned by default. lvmetad always keeps
|
|
# unfiltered information which is provided to LVM commands.
|
|
# Each LVM command then filters based on devices/filter.
|
|
# This does not apply to other, non-regexp, filtering settings:
|
|
# component filters such as multipath and MD are checked
|
|
# during pvscan --cache.
|
|
# To filter a device and prevent scanning from the LVM system
|
|
# entirely, including lvmetad, use devices/global_filter.
|
|
# lvmetad is not compatible with locking_type 3 (clustering).
|
|
# LVM prints warnings and ignores lvmetad if this combination
|
|
# is seen.
|
|
use_lvmetad = 1
|
|
|
|
# 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.
|
|
# The thin tools are available from the package
|
|
# device-mapper-persistent-data.
|
|
# 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.
|
|
# (For thin tools, see thin_check_executable.)
|
|
# 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.
|
|
# (For thin tools, see thin_check_executable.)
|
|
# 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
|
|
# --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 add
|
|
# --clear-needs-check-flag.
|
|
# 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 does not have a default value defined.
|
|
# 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: 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.
|
|
# thin_disabled_features = []
|
|
|
|
# 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.
|
|
# The cache tools are available from the package
|
|
# device-mapper-persistent-data.
|
|
# 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.
|
|
# (For cache tools, see cache_check_executable.)
|
|
# 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.
|
|
# (For cache tools, see cache_check_executable.)
|
|
# cache_repair_executable = "/usr/sbin/cache_repair"
|
|
|
|
# Configuration option global/cache_check_options.
|
|
# List of options passed to the cache_check command.
|
|
# cache_check_options = "-q"
|
|
|
|
# Configuration option global/cache_repair_options.
|
|
# List of options passed to the cache_repair command.
|
|
# This configuration option does not have a default value defined.
|
|
# cache_repair_options = ""
|
|
|
|
# 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.
|
|
# Possible options are: none, lvmlocal, uname, machineid, file.
|
|
# 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 file /etc/machine-id to set the
|
|
# system ID. Some systems create this file at installation time.
|
|
# See 'man machine-id'.
|
|
# 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.
|
|
# system_id_file = ""
|
|
|
|
# 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.
|
|
use_lvmpolld = 0
|
|
}
|
|
|
|
# Configuration section activation.
|
|
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.
|
|
# 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 'dmsetup udevcomplete_all' to
|
|
# wake them up.
|
|
# The '--nodevsync' option overrides this setting.
|
|
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. 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 KB 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 KB 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).
|
|
# Possible options are: vgname, vgname/lvname, @tag, @*
|
|
# vgname is matched exactly and selects all LVs in the VG.
|
|
# vgname/lvname is matched exactly and selects the LV.
|
|
# @tag selects if tag matches a tag set on the LV or VG.
|
|
# @* selects 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.
|
|
# volume_list = []
|
|
|
|
# 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,
|
|
# e.g. vgchange -a ay, or lvchange -a ay vgname/lvname.
|
|
# 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.
|
|
# An example of a system-generated auto-activation
|
|
# command is 'pvscan --cache -aay' which is generated
|
|
# when udev and lvmetad detect a new VG has appeared
|
|
# on the system, and want LVs in it to be auto-activated.
|
|
# Possible options are: vgname, vgname/lvname, @tag, @*
|
|
# See volume_list for how these options are matched to LVs.
|
|
# This configuration option does not have a default value defined.
|
|
# auto_activation_volume_list = []
|
|
|
|
# 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.
|
|
# Possible options are: vgname, vgname/lvname, @tag, @*
|
|
# See volume_list for how these options are matched to LVs.
|
|
# This configuration option does not have a default value defined.
|
|
# read_only_volume_list = []
|
|
|
|
# Configuration option activation/raid_region_size.
|
|
# Size in KiB of each raid or mirror synchronization region.
|
|
# For raid or mirror segment types, this is the amount of
|
|
# data that is copied at once when initializing, or moved
|
|
# at once by pvmove.
|
|
raid_region_size = 512
|
|
|
|
# Configuration option activation/error_when_full.
|
|
# Return errors if a thin pool runs out of space.
|
|
# 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.
|
|
# The '--errorwhenfull y|n' option overrides this setting.
|
|
# error_when_full = 0
|
|
|
|
# Configuration option activation/readahead.
|
|
# Setting to use when there is no readahead setting in metadata.
|
|
# Possible options are: none, auto.
|
|
# 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 perfomed by dmeventd automatically, and the steps
|
|
# perfomed by 'lvconvert --repair --use-policies' run manually.
|
|
# Automatic handling requires dmeventd to be monitoring the LV.
|
|
# Possible options are: warn, allocate.
|
|
# 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 logical volume (1 device for
|
|
# raid4/5, 2 for raid6, etc) the LV will remain usable.
|
|
# allocate - Attempt to use any extra physical volumes in the
|
|
# volume group 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 'lvconvert --repair --use-policies' run manually.
|
|
# Automatic handling requires dmeventd to be monitoring the LV.
|
|
# Possible options are: remove, allocate, allocate_anywhere.
|
|
# 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:
|
|
# With snapshot_autoextend_threshold 70 and
|
|
# snapshot_autoextend_percent 20, whenever a snapshot
|
|
# exceeds 70% usage, it will be extended by another 20%.
|
|
# For a 1G snapshot, using 700M will trigger a resize to 1.2G.
|
|
# When the usage exceeds 840M, the snapshot will be extended
|
|
# to 1.44G, and so on.
|
|
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.
|
|
# Also see snapshot_autoextend_threshold.
|
|
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:
|
|
# With thin_pool_autoextend_threshold 70 and
|
|
# thin_pool_autoextend_percent 20, whenever a thin pool
|
|
# exceeds 70% usage, it will be extended by another 20%.
|
|
# For a 1G thin pool, using up 700M will trigger a resize to 1.2G.
|
|
# When the usage exceeds 840M, the thin pool will be extended
|
|
# to 1.44G, and so on.
|
|
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.
|
|
thin_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.
|
|
# mlock_filter = []
|
|
|
|
# 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.
|
|
# When enabled, LVM will ask dmeventd to monitor LVs
|
|
# that are activated.
|
|
# The '--ignoremonitoring' option overrides this setting.
|
|
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.
|
|
# 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.
|
|
# The '--setactivationskip y|n' option overrides this setting.
|
|
# auto_set_activation_skip = 1
|
|
|
|
# Configuration option activation/activation_mode.
|
|
# How LVs with missing devices are activated.
|
|
# Possible options are: complete, degraded, partial.
|
|
# 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 Logical Volume inaccessible.
|
|
# This setting should not normally be used, but may
|
|
# sometimes assist with data recovery.
|
|
# The '--activationmode' option overrides this setting.
|
|
activation_mode = "degraded"
|
|
}
|
|
|
|
# Configuration section metadata.
|
|
# metadata {
|
|
|
|
# Configuration option metadata/pvmetadatacopies.
|
|
# Number of copies of metadata to store on each PV.
|
|
# Possible options are: 0, 1, 2.
|
|
# If set to 2, two copies of the VG metadata are stored on
|
|
# the PV, one at the front of the PV, and one at the end.
|
|
# If set to 1, one copy is stored at the front of the PV.
|
|
# If set to 0, no copies are stored on the PV. This may
|
|
# be useful with VGs containing large numbers of PVs.
|
|
# The '--pvmetadatacopies' option overrides this setting.
|
|
# This configuration option is advanced.
|
|
# pvmetadatacopies = 1
|
|
|
|
# Configuration option metadata/vgmetadatacopies.
|
|
# Number of copies of metadata to maintain for each VG.
|
|
# 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'.
|
|
# The '--vgmetadatacopies' option overrides this setting.
|
|
# vgmetadatacopies = 0
|
|
|
|
# Configuration option metadata/pvmetadatasize.
|
|
# Approximate number of sectors to use for each metadata copy.
|
|
# VGs with large numbers of PVs or LVs, or VGs containing
|
|
# complex LV structures, may need additional space for VG
|
|
# metadata. The metadata areas are treated as circular buffers,
|
|
# so unused space becomes filled with an archive of the most
|
|
# recent previous versions of the metadata.
|
|
# pvmetadatasize = 255
|
|
|
|
# Configuration option metadata/pvmetadataignore.
|
|
# Ignore metadata areas on a new PV.
|
|
# If metadata areas on a PV are ignored, LVM will not store
|
|
# metadata in them.
|
|
# The '--metadataignore' option overrides this setting.
|
|
# This configuration option is advanced.
|
|
# pvmetadataignore = 0
|
|
|
|
# Configuration option metadata/stripesize.
|
|
# This configuration option is advanced.
|
|
# stripesize = 64
|
|
|
|
# Configuration option metadata/dirs.
|
|
# Directories holding live copies of text format metadata.
|
|
# These directories must not be on logical volumes!
|
|
# It's possible to use LVM with a couple of directories here,
|
|
# preferably on different (non-LV) filesystems, and with no other
|
|
# on-disk metadata (pvmetadatacopies = 0). Or this can be in
|
|
# addition to on-disk metadata areas.
|
|
# The feature was originally added to simplify testing and is not
|
|
# supported under low memory situations - the machine could lock up.
|
|
# Never edit any files in these directories by hand unless you
|
|
# you are absolutely sure you know what you are doing! Use
|
|
# the supplied toolset to make changes (e.g. vgcfgrestore).
|
|
# Example:
|
|
# dirs = [ "/etc/lvm/metadata", "/mnt/disk2/lvm/metadata2" ]
|
|
# This configuration option is advanced.
|
|
# This configuration option does not have a default value defined.
|
|
# dirs = []
|
|
# }
|
|
|
|
# Configuration section report.
|
|
# LVM report command output formatting.
|
|
# report {
|
|
|
|
# Configuration option report/compact_output.
|
|
# Do not print empty report fields.
|
|
# 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.
|
|
# compact_output = 0
|
|
|
|
# Configuration option report/aligned.
|
|
# Align columns in report output.
|
|
# 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.
|
|
# buffered = 1
|
|
|
|
# Configuration option report/headings.
|
|
# Show headings for columns on report.
|
|
# headings = 1
|
|
|
|
# Configuration option report/separator.
|
|
# A separator to use on report after each field.
|
|
# separator = " "
|
|
|
|
# Configuration option report/list_item_separator.
|
|
# A separator to use for list items when reported.
|
|
# list_item_separator = ","
|
|
|
|
# Configuration option report/prefixes.
|
|
# Use a field name prefix for each field reported.
|
|
# prefixes = 0
|
|
|
|
# Configuration option report/quoted.
|
|
# Quote field values when using field name prefixes.
|
|
# quoted = 1
|
|
|
|
# Configuration option report/colums_as_rows.
|
|
# Output each column as a row.
|
|
# If set, this also implies report/prefixes = 1.
|
|
# colums_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).
|
|
# binary_values_as_numeric = 0
|
|
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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.
|
|
# 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 section dmeventd.
|
|
# Settings for the LVM event daemon.
|
|
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.
|
|
# 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/executable.
|
|
# The full path to the dmeventd binary.
|
|
# executable = "/usr/sbin/dmeventd"
|
|
}
|
|
|
|
# Configuration section tags.
|
|
# Host tag settings.
|
|
# tags {
|
|
|
|
# Configuration option tags/hosttags.
|
|
# Create a host tag using the machine name.
|
|
# The machine name is nodename returned by uname(2).
|
|
# 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 does not have a default value defined.
|
|
# 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.
|
|
# host_list = ""
|
|
# }
|
|
# }
|