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An OS installer can create system.devices for the system and
disks, but an OS image cannot create the system-specific
system.devices. The OS image can instead configure the
image so that lvm will create system.devices on first boot.
Image preparation steps to enable auto creation of system.devices:
- create empty file /etc/lvm/devices/auto-import-rootvg
- remove any existing /etc/lvm/devices/system.devices
- enable lvm-devices-import.path
- enable lvm-devices-import.service
On first boot of the prepared image:
- udev triggers vgchange -aay --autoactivation event <rootvg>
- vgchange activates LVs in the root VG
- vgchange finds the file /etc/lvm/devices/auto-import-rootvg,
and no /etc/lvm/devices/system.devices, so it creates
/run/lvm/lvm-devices-import
- lvm-devices-import.path is run when /run/lvm/lvm-devices-import
appears, and triggers lvm-devices-import.service
- lvm-devices-import.service runs vgimportdevices --rootvg --auto
- vgimportdevices finds /etc/lvm/devices/auto-import-rootvg,
and no system.devices, so it creates system.devices containing
PVs in the root VG, and removes /etc/lvm/devices/auto-import-rootvg
and /run/lvm/lvm-devices-import
Run directly, vgimportdevices --rootvg (without --auto), will create
a new system.devices for the root VG, or will add devices for the
root VG to an existing system.devices.
When building in other dir, ensure srcdir is used to find helper
script (via vpath) through $< usage.
Add also missing [INSTALL] prints for some installed files.
Instead of relying on 'pvs' output - check directly system
configuation and use lvmdevice accrording to use_devicesfile setting.
Also drop use of --fs ignore for filesystem extension for better
backward compatibility with older lvm version.
Shuffle code a bit so the '--no-snapshot' path does not execute
a few unnecessary commands.
Work also with devices that may have ':' inside their generated
/dev/disk/by-id
Ensure there is no race with systems' auto activation while using
the snapshot for conversion.
Update system's vdoconf.yml after the use of snapshot for conversion.
Skip unnecesary prompt for 'convert' while using snapshot and query only
for final snaphot merge.
Prohibit conversion for a device with the PV header.
Enhance 'trap' protection for more signals.
Improve clean() recovery path.
Replace bash 'test' command with [].
Correct some output message to print $TOOL.
Support also options without '-' in the middle i.e. --nosnapshot.
For shellcheck predefine all variables extracted from vdoconf.yml.
When the import is used on a system, that uses devices file,
the final activation was impossible for the case the converted
volume was not present in devices file.
Currently add volume automatically in such case.
Also add some more debugging output from the script.
TODO: Consider enhnacing lvconvert with extending devices file.
VDO is using specific path for some device paths.
i.e. for /dev/sda it could be /dev/disk/by-id/scsi-xxxxx.
This used to be not a problem before lvm2 started to use snapshot,
but now it needs to replace matching device path.
So switch to the path naming used in vdoconf.yml file.
Output from vdo manager may actually indent output with spaces,
so trim leading and ending space.
Also add support for verbosity flag for vdo conversion tool.
This vdo parameter existed in the early stage of integration of vdo into lvm2,
but later it's been removed from vdoformat tool - so actually if
there would be any non-zero value it would cause error on lvcreate.
Option was not stored on disk in lvm2 metadata.
Remove this vdo parameter from lvm2 sources.
(Although this vdo parameter will be still accepted on cmdline through
--vdosettings option, but it will be ignored.)
Ensure the volume after conversion has the properly aligned size to the
volume group extent size. This would be visible when using virtual size,
that cannot be divided by extent size.
Before the user had to manually adjust the size after conversion to get
access to all data stored on VDO volume.
Add support for usage of 'dm-snapshot' for doing whole device conversion
in a snapshot which could be merged once the whole conversion has been
made.
This helps with cases where there would be any unexpected failure in the
middle of conversion process and user can continue using original
device until problem in conversion is fixed.
Import tool now uses 'truncate' tool to create a small backend file (20M) for loop device
to hold COW exception store.
Option --vdo-config has been added to allow specifing location of vdo
configuration file.
Option --no-snapshot allows to use import tool without creation of
snapshot, however recovery after finished VDO conversion and unfinished
lvm2 conversion is then very difficult.
Option --uuid-prefix allow to specify DM UUID prefix for snapshot
device.
Use read with -r.
Reduce shellcheck warnings about missing {} for possible array
dereference.
Make sure we are not loosing error code when assigning local vars
and explicitely ignore 'errors' from standalone lines when needed.
Add some missing quotes.
Use $() instead of ancient ``
Avoid writing some temporary data into /tmp - test need to store
files within its own 'testdir' - so it can be properly discarded.
typo used "cryptresize" as command name
this affects cases where the file system is resized
independently, and then the lvresize command is used
which only needs to resize the crypt device and the LV.
The new option "--fs String" for lvresize/lvreduce/lvextend
controls the handling of file systems before/after resizing
the LV. --resizefs is the same as --fs resize.
The new option "--fsmode String" can be used to control
mounting and unmounting of the fs during resizing.
Possible --fs values:
checksize
Only applies to reducing size; does nothing for extend.
Check the fs size and reduce the LV if the fs is not using
the affected space, i.e. the fs does not need to be shrunk.
Fail the command without reducing the fs or LV if the fs is
using the affected space.
resize
Resize the fs using the fs-specific resize command.
This may include mounting, unmounting, or running fsck.
See --fsmode to control mounting behavior, and --nofsck to
disable fsck.
resize_fsadm
Use the old method of calling fsadm to handle the fs
(deprecated.) Warning: this option does not prevent lvreduce
from destroying file systems that are unmounted (or mounted
if prompts are skipped.)
ignore
Resize the LV without checking for or handling a file system.
Warning: using ignore when reducing the LV size may destroy the
file system.
Possible --fsmode values:
manage
Mount or unmount the fs as needed to resize the fs,
and attempt to restore the original mount state at the end.
nochange
Do not mount or unmount the fs. If mounting or unmounting
is required to resize the fs, then do not resize the fs or
the LV and fail the command.
offline
Unmount the fs if it is mounted, and resize the fs while it
is unmounted. If mounting is required to resize the fs,
then do not resize the fs or the LV and fail the command.
Notes on lvreduce:
When no --fs or --resizefs option is specified:
. lvextend default behavior is fs ignore.
. lvreduce default behavior is fs checksize
(includes activating the LV.)
With the exception of --fs resize_fsadm|ignore, lvreduce requires
the recent libblkid fields FSLASTBLOCK and FSBLOCKSIZE.
FSLASTBLOCK*FSBLOCKSIZE is the last byte used by the fs on the LV,
which determines if reducing the fs is necessary.
Patch 1b070f366b should have
been already fixing this issue but since it the incorrect
patch rebasing the change to vdo_slabSize got lost.
So again now with explicit one-line patch.
When converting VDO volume, the parameter vdo_slabSize was
incorrectly copied as vdo_blockMapCacheSize, however this parameter
is then no longer used for any table line creation so the wrong
value was only stored in metadata.
Also use just single get_kb_size_with_unit_ and remove it's duplicate
functionality with get_mb_size_with_unit_.
Use $VERB for vdo remove call.
event based autoactivation is now the only method that lvm
provides for autoactivation.
Setting lvm.conf event_activation=0 can still be used to disable
event based autoactivation commands, but doing so will no longer
enable static autoactivation.
new udev rule 69-dm-lvm.rules replaces
69-dm-lvm-meta.rules and lvm2-pvscan.service
udev rule calls pvscan directly on the added device
pvscan output indicates if a complete VG can be activated
udev env var LVM_VG_NAME_COMPLETE is used to pass complete
VG name from pvscan to the udev rule
udev rule uses systemd-run to run vgchange -aay <vgname>
Do not call 'dmsetup info' for non-dm devices.
Better handling for VGNAME and LVNAME - so when convering LV as
backend device automatically recognize it and reuse LV name for VDOLV.
Add prompt for final confirmation before actual conversion is started
(once confirmed, lvm2 commands no longer prompts to avoid leaving
conversion in the middle of its process.)
Add tool 'vdoimport' to support easy conversion of an existing VDO manager managed
VDO volumes into lvm2 managed VDO LV.
When physical converted volume is already a logical volume, conversion
happens with the VG itself, just with validation for extent_size, so
the virtually sized logical VDO volume size can be expressed in extents.
Example of basic simple usage:
vdoimport --name vg/vdolv /dev/mapper/vdophysicalvolume
Fsadm wants to print its own error message when it can't detect
type of the filesystem on a block device.
Otherwise fsadm exits with no message on an unused block device.
When blocksize --getsize64 gives empty result we want to fallback
to ancient --getsize * --getss calculation (RHBZ #1942486).
Reported by: ajschorr@alumni.princeton.edu
When 'fsadm resize vg/lv' is used without size, it should just
resize filesystem to match device - but since we now check
for unbound variable in bash - the previous usage no longer
works and needs explicit check.
Older blockdev tool return failure error code with --help,
and since now the tool abort on command failure, lets
detect missing --getsize64 support directly by running
command and check if it returns something usable.
It's likely very hard to have the system with
such old blockdev tool and newer lvm2 compiled.
