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udev+systemd: make pvscan --cache -aay run as systemd background job from udev
The new lvm2-pvscan@.service is responsible for on-demand execution of "pvscan --cache --activate ay" which causes lvmetad to be updated and LVM activation done if the VG is complete. Also, use udev-systemd mechanism to instantiate the job as the lvm2-pvscan@$devnode.service on each newly appeared PV in the system. This prevents the background job to be killed (that would happen if it was directly forked from udev rule - this behaviour is seen in recent versions of udev with the help of systemd that can track detached processes - the detached process would still be in the same cgroup). To enable this official udev-systemd protocol for instantiating background jobs, use new --enable-udev-systemd-background-jobs configure switch (it's disabled by default). This option is highly recommended wherever systemd is used!
This commit is contained in:
Peter Rajnoha
parent
9f406ce252
commit
546db1c4be
@ -1,5 +1,7 @@
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Version 2.02.104
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===================================
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Add configure --enable-udev-systemd-background-jobs.
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Add lvm2-pvscan@.service to run pvscan as a service for lvmetad/autoactivation.
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Fix lvconvert swap of poolmetadata volume for active thin pool.
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Check for open count with a timeout before removal/deactivation of an LV.
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Report RAID images split with tracking as out-of-sync ("I").
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24
configure
vendored
24
configure
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@ -613,6 +613,7 @@ DMEVENTD_PIDFILE
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WRITE_INSTALL
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UDEV_HAS_BUILTIN_BLKID
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UDEV_RULE_EXEC_DETECTION
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UDEV_SYSTEMD_BACKGROUND_JOBS
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UDEV_SYNC
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UDEV_RULES
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UDEV_PC
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@ -849,6 +850,7 @@ enable_valgrind_pool
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enable_devmapper
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enable_lvmetad
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with_lvmetad_pidfile
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enable_udev_systemd_background_jobs
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enable_udev_sync
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enable_udev_rules
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enable_udev_rule_exec_detection
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@ -1552,6 +1554,9 @@ Optional Features:
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--enable-valgrind-pool enable valgrind awareness of pools
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--disable-devmapper disable LVM2 device-mapper interaction
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--enable-lvmetad enable the LVM Metadata Daemon
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--enable-udev-systemd-background-jobs
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enable udev-systemd protocol to instantiate a
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service for background job
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--enable-udev_sync enable synchronisation with udev processing
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--enable-udev_rules install rule files needed for udev synchronisation
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--enable-udev-rule-exec-detection
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@ -9089,6 +9094,19 @@ _ACEOF
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fi
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################################################################################
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use udev-systemd protocol for jobs in background" >&5
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$as_echo_n "checking whether to use udev-systemd protocol for jobs in background... " >&6; }
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# Check whether --enable-udev-systemd-background-jobs was given.
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if test "${enable_udev_systemd_background_jobs+set}" = set; then :
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enableval=$enable_udev_systemd_background_jobs; UDEV_SYSTEMD_BACKGROUND_JOBS=$enableval
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else
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UDEV_SYSTEMD_BACKGROUND_JOBS=no
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $UDEV_SYSTEMD_BACKGROUND_JOBS" >&5
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$as_echo "$UDEV_SYSTEMD_BACKGROUND_JOBS" >&6; }
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################################################################################
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable synchronisation with udev processing" >&5
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$as_echo_n "checking whether to enable synchronisation with udev processing... " >&6; }
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@ -9668,7 +9686,6 @@ if [ \( "x$LVM1" = xshared -o "x$POOL" = xshared -o "x$CLUSTER" = xshared \
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fi
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################################################################################
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if [ "$DMEVENTD" = yes -o "$CLVMD" != none ] ; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_mutex_lock in -lpthread" >&5
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$as_echo_n "checking for pthread_mutex_lock in -lpthread... " >&6; }
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if test "${ac_cv_lib_pthread_pthread_mutex_lock+set}" = set; then :
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@ -9711,7 +9728,6 @@ else
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hard_bailout
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fi
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fi
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################################################################################
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable selinux support" >&5
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@ -10931,10 +10947,11 @@ LVM_LIBAPI=`echo "$VER" | $AWK -F '[()]' '{print $2}'`
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################################################################################
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ac_config_files="$ac_config_files Makefile make.tmpl daemons/Makefile daemons/clvmd/Makefile daemons/cmirrord/Makefile daemons/dmeventd/Makefile daemons/dmeventd/libdevmapper-event.pc daemons/dmeventd/plugins/Makefile daemons/dmeventd/plugins/lvm2/Makefile daemons/dmeventd/plugins/raid/Makefile daemons/dmeventd/plugins/mirror/Makefile daemons/dmeventd/plugins/snapshot/Makefile daemons/dmeventd/plugins/thin/Makefile daemons/lvmetad/Makefile conf/Makefile conf/example.conf conf/default.profile include/.symlinks include/Makefile lib/Makefile lib/format1/Makefile lib/format_pool/Makefile lib/locking/Makefile lib/mirror/Makefile lib/replicator/Makefile lib/misc/lvm-version.h lib/raid/Makefile lib/snapshot/Makefile lib/thin/Makefile libdaemon/Makefile libdaemon/client/Makefile libdaemon/server/Makefile libdm/Makefile libdm/libdevmapper.pc liblvm/Makefile liblvm/liblvm2app.pc man/Makefile po/Makefile python/Makefile python/setup.py scripts/blkdeactivate.sh scripts/blk_availability_init_red_hat scripts/blk_availability_systemd_red_hat.service scripts/clvmd_init_red_hat scripts/cmirrord_init_red_hat scripts/lvm2_lvmetad_init_red_hat scripts/lvm2_lvmetad_systemd_red_hat.socket scripts/lvm2_lvmetad_systemd_red_hat.service scripts/lvm2_monitoring_init_red_hat scripts/dm_event_systemd_red_hat.socket scripts/dm_event_systemd_red_hat.service scripts/lvm2_monitoring_systemd_red_hat.service scripts/lvm2_tmpfiles_red_hat.conf scripts/Makefile test/Makefile test/api/Makefile test/unit/Makefile tools/Makefile udev/Makefile unit-tests/datastruct/Makefile unit-tests/regex/Makefile unit-tests/mm/Makefile"
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ac_config_files="$ac_config_files Makefile make.tmpl daemons/Makefile daemons/clvmd/Makefile daemons/cmirrord/Makefile daemons/dmeventd/Makefile daemons/dmeventd/libdevmapper-event.pc daemons/dmeventd/plugins/Makefile daemons/dmeventd/plugins/lvm2/Makefile daemons/dmeventd/plugins/raid/Makefile daemons/dmeventd/plugins/mirror/Makefile daemons/dmeventd/plugins/snapshot/Makefile daemons/dmeventd/plugins/thin/Makefile daemons/lvmetad/Makefile conf/Makefile conf/example.conf conf/default.profile include/.symlinks include/Makefile lib/Makefile lib/format1/Makefile lib/format_pool/Makefile lib/locking/Makefile lib/mirror/Makefile lib/replicator/Makefile lib/misc/lvm-version.h lib/raid/Makefile lib/snapshot/Makefile lib/thin/Makefile libdaemon/Makefile libdaemon/client/Makefile libdaemon/server/Makefile libdm/Makefile libdm/libdevmapper.pc liblvm/Makefile liblvm/liblvm2app.pc man/Makefile po/Makefile python/Makefile python/setup.py scripts/blkdeactivate.sh scripts/blk_availability_init_red_hat scripts/blk_availability_systemd_red_hat.service scripts/clvmd_init_red_hat scripts/cmirrord_init_red_hat scripts/lvm2_lvmetad_init_red_hat scripts/lvm2_lvmetad_systemd_red_hat.socket scripts/lvm2_lvmetad_systemd_red_hat.service scripts/lvm2_pvscan_systemd_red_hat@.service scripts/lvm2_monitoring_init_red_hat scripts/dm_event_systemd_red_hat.socket scripts/dm_event_systemd_red_hat.service scripts/lvm2_monitoring_systemd_red_hat.service scripts/lvm2_tmpfiles_red_hat.conf scripts/Makefile test/Makefile test/api/Makefile test/unit/Makefile tools/Makefile udev/Makefile unit-tests/datastruct/Makefile unit-tests/regex/Makefile unit-tests/mm/Makefile"
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cat >confcache <<\_ACEOF
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# This file is a shell script that caches the results of configure
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@ -11671,6 +11688,7 @@ do
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"scripts/lvm2_lvmetad_init_red_hat") CONFIG_FILES="$CONFIG_FILES scripts/lvm2_lvmetad_init_red_hat" ;;
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"scripts/lvm2_lvmetad_systemd_red_hat.socket") CONFIG_FILES="$CONFIG_FILES scripts/lvm2_lvmetad_systemd_red_hat.socket" ;;
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"scripts/lvm2_lvmetad_systemd_red_hat.service") CONFIG_FILES="$CONFIG_FILES scripts/lvm2_lvmetad_systemd_red_hat.service" ;;
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"scripts/lvm2_pvscan_systemd_red_hat@.service") CONFIG_FILES="$CONFIG_FILES scripts/lvm2_pvscan_systemd_red_hat@.service" ;;
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"scripts/lvm2_monitoring_init_red_hat") CONFIG_FILES="$CONFIG_FILES scripts/lvm2_monitoring_init_red_hat" ;;
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"scripts/dm_event_systemd_red_hat.socket") CONFIG_FILES="$CONFIG_FILES scripts/dm_event_systemd_red_hat.socket" ;;
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"scripts/dm_event_systemd_red_hat.service") CONFIG_FILES="$CONFIG_FILES scripts/dm_event_systemd_red_hat.service" ;;
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11
configure.in
11
configure.in
@ -939,6 +939,15 @@ if test x$BUILD_LVMETAD = xyes; then
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[Path to lvmetad pidfile.])
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fi
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################################################################################
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dnl -- Enable udev-systemd protocol to instantiate a service for background jobs
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AC_MSG_CHECKING(whether to use udev-systemd protocol for jobs in background)
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AC_ARG_ENABLE(udev-systemd-background-jobs,
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AC_HELP_STRING([--enable-udev-systemd-background-jobs],
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[enable udev-systemd protocol to instantiate a service for background job]),
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UDEV_SYSTEMD_BACKGROUND_JOBS=$enableval, UDEV_SYSTEMD_BACKGROUND_JOBS=no)
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AC_MSG_RESULT($UDEV_SYSTEMD_BACKGROUND_JOBS)
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################################################################################
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dnl -- Enable udev synchronisation
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AC_MSG_CHECKING(whether to enable synchronisation with udev processing)
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@ -1626,6 +1635,7 @@ AC_SUBST(UDEV_LIBS)
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AC_SUBST(UDEV_PC)
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AC_SUBST(UDEV_RULES)
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AC_SUBST(UDEV_SYNC)
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AC_SUBST(UDEV_SYSTEMD_BACKGROUND_JOBS)
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AC_SUBST(UDEV_RULE_EXEC_DETECTION)
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AC_SUBST(UDEV_HAS_BUILTIN_BLKID)
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AC_SUBST(CUNIT_LIBS)
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@ -1700,6 +1710,7 @@ scripts/cmirrord_init_red_hat
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scripts/lvm2_lvmetad_init_red_hat
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scripts/lvm2_lvmetad_systemd_red_hat.socket
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scripts/lvm2_lvmetad_systemd_red_hat.service
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scripts/lvm2_pvscan_systemd_red_hat@.service
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scripts/lvm2_monitoring_init_red_hat
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scripts/dm_event_systemd_red_hat.socket
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scripts/dm_event_systemd_red_hat.service
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@ -107,6 +107,7 @@ endif
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ifeq ("@BUILD_LVMETAD@", "yes")
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$(INSTALL_DATA) lvm2_lvmetad_systemd_red_hat.socket $(systemd_unit_dir)/lvm2-lvmetad.socket
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$(INSTALL_DATA) lvm2_lvmetad_systemd_red_hat.service $(systemd_unit_dir)/lvm2-lvmetad.service
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$(INSTALL_DATA) lvm2_pvscan_systemd_red_hat@.service $(systemd_unit_dir)/lvm2-pvscan@.service
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endif
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install_tmpfiles_configuration:
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@ -118,6 +119,7 @@ DISTCLEAN_TARGETS += clvmd_init_red_hat cmirrord_init_red_hat \
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dm_event_systemd_red_hat.socket dm_event_systemd_red_hat.service \
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lvm2_monitoring_systemd_red_hat.service \
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lvm2_lvmetad_systemd_red_hat.socket lvm2_lvmetad_systemd_red_hat.service \
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lvm2_lvmetad_systemd_red_hat@.service \
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lvm2_tmpfiles_red_hat.conf blk_availability_init_red_hat \
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blk_availability_systemd_red_hat.service \
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blkdeactivate.sh
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11
scripts/lvm2_pvscan_systemd_red_hat@.service.in
Normal file
11
scripts/lvm2_pvscan_systemd_red_hat@.service.in
Normal file
@ -0,0 +1,11 @@
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[Unit]
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Description=LVM2 PV scan on %I
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Documentation=man:pvscan(8)
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DefaultDependencies=no
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After=lvm2-lvmetad.socket %i.device
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Before=shutdown.target
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Conflicts=shutdown.target
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[Service]
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Type=simple
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ExecStart=@sbindir@/pvscan --cache --activate ay %I
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@ -79,6 +79,6 @@ LABEL="lvm_scan"
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# MD | | X | X* | |
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# loop | | X | X* | |
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# other | X | | X | | X
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RUN+="(LVM_EXEC)/lvm pvscan --background --cache --activate ay --major $major --minor $minor", ENV{LVM_SCANNED}="1"
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(PVSCAN_RULE)
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LABEL="lvm_end"
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@ -46,8 +46,14 @@ else
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BLKID_RULE=IMPORT{program}=\"${SBIN}\/blkid -o udev -p \$$tempnode\"
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endif
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ifeq ("@UDEV_SYSTEMD_BACKGROUND_JOBS@", "yes")
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PVSCAN_RULE=ENV{SYSTEMD_WANTS}=\"lvm2-pvscan@\$$devnode.service\"
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else
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PVSCAN_RULE=RUN\+\=\"$(LVM_EXEC)/lvm pvscan --background --cache --activate ay --major \$$major --minor \$$minor\", ENV{LVM_SCANNED}=\"1\"
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endif
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%.rules: %.rules.in
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$(SED) -e "s+(DM_DIR)+$(DM_DIR)+;s+(BLKID_RULE)+$(BLKID_RULE)+;s+(DM_EXEC_RULE)+$(DM_EXEC_RULE)+;s+(DM_EXEC)+$(DM_EXEC)+;s+(LVM_EXEC_RULE)+$(LVM_EXEC_RULE)+;s+(LVM_EXEC)+$(LVM_EXEC)+;" $< >$@
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$(SED) -e "s+(DM_DIR)+$(DM_DIR)+;s+(BLKID_RULE)+$(BLKID_RULE)+;s+(PVSCAN_RULE)+$(PVSCAN_RULE)+;s+(DM_EXEC_RULE)+$(DM_EXEC_RULE)+;s+(DM_EXEC)+$(DM_EXEC)+;s+(LVM_EXEC_RULE)+$(LVM_EXEC_RULE)+;s+(LVM_EXEC)+$(LVM_EXEC)+;" $< >$@
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%_install: %.rules
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$(INSTALL_DATA) -D $< $(udevdir)/$(<F)
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