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package/lvm2: lvmetad integration

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lvmetad is usually combined with event-based system services that
automatically run pvscan --cache on disks added or removed.  This
way, the cache is automatically updated with metadata from new disks
when they appear.  LVM udev rules and systemd services implement this
automation.  Automatic scanning is usually combined with automatic
activation.  For more information, see pvscan(8).

Signed-off-by: Pascal de Bruijn <p.debruijn@unilogic.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Pascal de Bruijn 2020-03-02 08:49:50 +01:00 committed by Thomas Petazzoni
parent cb0ce03ba6
commit 9889b8ce7f
2 changed files with 19 additions and 0 deletions
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13
package/lvm2/Config.in
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@ -47,6 +47,19 @@ config BR2_PACKAGE_LVM2_APP_LIBRARY
comment "lvm2 application library needs a glibc or uClibc toolchain"
depends on BR2_TOOLCHAIN_USES_MUSL
config BR2_PACKAGE_LVM2_LVMETAD
bool "install lvmetad"
select BR2_PACKAGE_LVM2_APP_LIBRARY
help
Install lvmetad
The lvmetad daemon caches LVM metadata so that LVM commands
can read metadata from the cache rather than scanning disks.
This can be an advantage because scanning disks is time
consuming and may interfere with the normal work of the
system. lvmetad can be a disadvantage when disk event
notifications from the system are unreliable.
endif
comment "lvm2 needs a toolchain w/ threads, dynamic library"

6
package/lvm2/lvm2.mk
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@ -60,6 +60,12 @@ else
LVM2_CONF_OPTS += --disable-applib
endif
ifeq ($(BR2_PACKAGE_LVM2_LVMETAD),y)
LVM2_CONF_OPTS += --enable-lvmetad
else
LVM2_CONF_OPTS += --disable-lvmetad
endif
ifeq ($(BR2_INIT_SYSTEMD),y)
LVM2_INSTALL_TARGET_OPTS += install_systemd_units install_systemd_generators
endif