Re: [Libguestfs] LVM flakey failures

I think this is the interesting part: + lvm pvscan --cache --activate ay device-mapper: Device (SEQNUM=993, ACTION=add) is queued device-mapper: sd-device-monitor: Passed 193 byte to netlink monitor device-mapper: Processing device (SEQNUM=993, ACTION=add) device-mapper: NAME 'mapper/control' /lib/udev/rules.d/55-dm.rules:31 device-mapper: Handling device node '/dev/mapper/control', devnum=c10:236, mode=0600, uid=0, gid=0 device-mapper: Preserve permissions of /dev/mapper/control, 020600, uid=0, gid=0 device-mapper: Creating symlink '/dev/char/10:236' to '../mapper/control' device-mapper: sd-device: Created empty file '/run/udev/data/c10:236' for '/devices/virtual/misc/device-mapper' device-mapper: Device (SEQNUM=993, ACTION=add) processed device-mapper: sd-device-monitor: Passed 193 byte to netlink monitor 253:0: Device (SEQNUM=994, ACTION=add) is queued 253:0: sd-device-monitor: Passed 136 byte to netlink monitor 253:0: Processing device (SEQNUM=994, ACTION=add) 253:0: Device (SEQNUM=994, ACTION=add) processed 253:0: sd-device-monitor: Passed 136 byte to netlink monitor dm-0: Device (SEQNUM=995, ACTION=add) is queued dm-0: sd-device-monitor: Passed 188 byte to netlink monitor dm-0: Processing device (SEQNUM=995, ACTION=add) dm-0: GROUP 0 /lib/udev/rules.d/50-udev-default.rules:59 dm-0: Handling device node '/dev/dm-0', devnum=b253:0, mode=0600, uid=0, gid=0 dm-0: Preserve permissions of /dev/dm-0, 060600, uid=0, gid=0 dm-0: Creating symlink '/dev/block/253:0' to '../dm-0'dm-0: Device (SEQNUM=996, ACTION=change) is queued 253:1: Device (SEQNUM=997, ACTION=add) is queued 253:1: Processing device (SEQNUM=997, ACTION=add) 253:1: Device (SEQNUM=997, ACTION=add) processed 253:1: sd-device-monitor: Passed 136 byte to netlink monitor 253:1: sd-device-monitor: Passed 136 byte to netlink monitor dm-1: Device (SEQNUM=998, ACTION=add) is queued dm-1: Processing device (SEQNUM=998, ACTION=add) dm-1: GROUP 0 /lib/udev/rules.d/50-udev-default.rules:59 dm-1: Handling device node '/dev/dm-1', devnum=b253:1, mode=0600, uid=0, gid=0 dm-1: Preserve permissions of /dev/dm-1, 060600, uid=0, gid=0 dm-1: Creating symlink '/dev/block/253:1' to '../dm-1' dm-1: sd-device: Created db file '/run/udev/data/b253:1' for '/devices/virtual/block/dm-1' dm-1: Device (SEQNUM=998, ACTION=add) processeddm-1: sd-device-monitor: Passed 188 byte to netlink monitor dm-1: Device (SEQNUM=999, ACTION=change) is queued dm-0: sd-device: Created db file '/run/udev/data/b253:0' for '/devices/virtual/block/dm-0' dm-0: Device (SEQNUM=995, ACTION=add) processed dm-0: sd-device-monitor: Passed 327 byte to netlink monitor dm-0: sd-device-monitor: Passed 209 byte to netlink monitor dm-1: sd-device-monitor: Passed 327 byte to netlink monitordm-0: Processing device (SEQNUM=996, ACTION=change) dm-0: IMPORT '/sbin/dmsetup udevflags 6336918' /lib/udev/rules.d/55-dm.rules:52 Starting '/sbin/dmsetup udevflags 6336918' Successfully forked off '(spawn)' as PID 136. dm-1: sd-device-monitor: Passed 209 byte to netlink monitor dm-1: Processing device (SEQNUM=999, ACTION=change) dm-1: IMPORT '/sbin/dmsetup udevflags 6336918' /lib/udev/rules.d/55-dm.rules:52 Starting '/sbin/dmsetup udevflags 6336918' Successfully forked off '(spawn)' as PID 137. '/sbin/dmsetup udevflags 6336918'(out) 'DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG='1'' '/sbin/dmsetup udevflags 6336918'(out) 'DM_UDEV_PRIMARY_SOURCE_FLAG='1'' Process '/sbin/dmsetup udevflags 6336918' succeeded. dm-0: LINK 'mapper/rhel-swap' /lib/udev/rules.d/55-dm.rules:136 dm-0: IMPORT '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap' /lib/udev/rules.d/56-lvm.rules:21 Starting '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap' Successfully forked off '(spawn)' as PID 138.'/sbin/dmsetup udevflags 6336918'(out) 'DM_UDEV_DISABLE_LIBRARY_FALLBACK_FLAG='1'' '/sbin/dmsetup udevflags 6336918'(out) 'DM_UDEV_PRIMARY_SOURCE_FLAG='1'' '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap'(out) 'DM_VG_NAME='rhel'' '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap'(out) 'DM_LV_NAME='swap'' '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap'(out) 'DM_LV_LAYER=''' Process '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap' succeeded.Process '/sbin/dmsetup udevflags 6336918' succeeded. dm-1: LINK 'mapper/rhel-root' /lib/udev/rules.d/55-dm.rules:136 dm-1: IMPORT '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-root' /lib/udev/rules.d/56-lvm.rules:21 Starting '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-root' Successfully forked off '(spawn)' as PID 139. dm-0: LINK 'rhel/swap' /lib/udev/rules.d/56-lvm.rules:47 dm-0: LINK 'disk/by-id/dm-name-rhel-swap' /lib/udev/rules.d/60-persistent-storage-dm.rules:17 dm-0: LINK 'disk/by-id/dm-uuid-LVM-x06hRU2yvmTSN0lIa6z1DKEgd9r51XboEVgg8YdhPyNGooshjsJZFwDraGqJBAAp' /lib/udev/rules.d/60-persistent-storage-dm.rules:18 dm-0: IMPORT builtin 'blkid' /lib/udev/rules.d/60-persistent-storage-dm.rules:23 dm-0: Probe /dev/dm-0 with raid and offset=0 Process '/sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-root' succeeded. dm-1: RUN '/sbin/dmsetup udevcomplete $env{DM_COOKIE}' /lib/udev/rules.d/95-dm-notify.rules:12 dm-1: Handling device node '/dev/dm-1', devnum=b253:1, mode=0600, uid=0, gid=0 dm-1: Preserve already existing symlink '/dev/block/253:1' to '../dm-1' dm-1: Creating symlink '/dev/mapper/rhel-root' to '../dm-1' dm-1: sd-device: Created db file '/run/udev/data/b253:1' for '/devices/virtual/block/dm-1' Starting '/sbin/dmsetup udevcomplete 6336918' Successfully forked off '(spawn)' as PID 140. dm-0: LINK 'disk/by-uuid/7ed3e932-edd1-4d73-9272-5a7c05ba84d5' /lib/udev/rules.d/60-persistent-storage-dm.rules:25 Process '/sbin/dmsetup udevcomplete 6336918' succeeded. dm-1: Device (SEQNUM=999, ACTION=change) processed dm-1: sd-device-monitor: Passed 556 byte to netlink monitor dm-0: RUN '/sbin/dmsetup udevcomplete $env{DM_COOKIE}' /lib/udev/rules.d/95-dm-notify.rules:12 dm-0: Handling device node '/dev/dm-0', devnum=b253:0, mode=0600, uid=0, gid=0 dm-0: Preserve already existing symlink '/dev/block/253:0' to '../dm-0' dm-0: Creating symlink '/dev/rhel/swap' to '../dm-0' dm-0: Creating symlink '/dev/disk/by-id/dm-uuid-LVM-x06hRU2yvmTSN0lIa6z1DKEgd9r51XboEVgg8YdhPyNGooshjsJZFwDraGqJBAAp' to '../../dm-0' dm-0: Creating symlink '/dev/disk/by-uuid/7ed3e932-edd1-4d73-9272-5a7c05ba84d5' to '../../dm-0' dm-0: Creating symlink '/dev/mapper/rhel-swap' to '../dm-0' dm-0: Creating symlink '/dev/disk/by-id/dm-name-rhel-swap' to '../../dm-0' dm-0: sd-device: Created db file '/run/udev/data/b253:0' for '/devices/virtual/block/dm-0' Starting '/sbin/dmsetup udevcomplete 6336918' Successfully forked off '(spawn)' as PID 141. 2 logical volume(s) in volume group "rhel" now active Process '/sbin/dmsetup udevcomplete 6336918' succeeded. dm-0: Adding watch on '/dev/dm-0' dm-0: sd-device: Created db file '/run/udev/data/b253:0' for '/devices/virtual/block/dm-0' dm-0: Device (SEQNUM=996, ACTION=change) processed dm-0: sd-device-monitor: Passed 900 byte to netlink monitor For some reason the following process didn't return anything (but succeeded): /sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-root However: /sbin/dmsetup splitname --nameprefixes --noheadings --rows rhel-swap Correctly returned: DM_VG_NAME='rhel' DM_LV_NAME='swap' DM_LV_LAYER='' I wonder why On Wed, Apr 7, 2021 at 4:36 PM Sam Eiderman <sameid(a)google.com&gt; wrote: