[Vdo-devel] vdo + lvm cache case vdo failed

[劼磊周]

hello：

 Today i try to use lvm cache on vdo device

i use the command

pvcreate /dev/sdb
pvcreate /dev/mapper/image_store
vgcreate image /dev/sdb
vgextend image /dev/mapper/image_store
lvcreate -l 20G -n meta image /dev/sdb
lvcreate -l 100%FREE -n cache image /dev/sdb
lvconvert --type cache-pool --poolmetadata image/meta image/cache

lvcreate -l 100%FREE -n data image /dev/mapper/image_store
lvconvert --type cache --cachepool image/cache --cachemode writeback
image/data
mkfs.xfs -K /dev/mapper/image-data
mount /dev/mapper/image-data /exports/disk0/

in my case sdb is ssd device
/dev/mapper/image_store  is a vdo device

Everything look fine after reboot.

We i reboot server. Vdo device cannot be start.

vdo: utils.FileLock: DEBUG - attempting to lock
/run/lock/vdo/_etc_vdoconf.yml.lock in 20s mode exclusive
vdo: utils.FileLock: DEBUG - attempting to lock
/run/lock/vdo-config-singletons mode exclusive
vdo: vdo.vdomgmnt.Configuration: DEBUG - Reading configuration from
/etc/vdoconf.yml
vdo: utils.FileLock: DEBUG - released lock /run/lock/vdo-config-singletons
vdo: vdo.vdomgmnt.Service.VDOService: INFO - Starting VDO image_store
Starting VDO image_store
vdo: vdo.vdomgmnt.Service.VDOService: DEBUG - No failure requiring recovery
for VDO volume image_store
vdo: utils.Command: DEBUG - dmsetup: command failed, exit status 1
vdo: utils.Command: DEBUG - stdout:
vdo: utils.Command: DEBUG - stderr: Device does not exist.
Command failed.
vdo: utils.Command: DEBUG - grep: command succeeded
vdo: utils.Command: DEBUG - stdout: MemAvailable:   130560288 kB
vdo: utils.Command: DEBUG - stderr:
vdo: utils.Command: DEBUG - modprobe: command succeeded
vdo: utils.Command: DEBUG - stdout:
vdo: utils.Command: DEBUG - stderr:
vdo: utils.Command: DEBUG - vdodumpconfig: command failed, exit status 1
vdo: utils.Command: DEBUG - stdout:
vdo: utils.Command: DEBUG - stderr: vdodumpconfig: allocateVDO failed for
'/dev/disk/by-id/scsi-364cd98f05bc87f00242af26c0b2df932' with VDO Status:
Bad magic number
vdodumpconfig: Could not load VDO from
'/dev/disk/by-id/scsi-364cd98f05bc87f00242af26c0b2df932'
vdo: vdo.vdomgmnt.Service.VDOService: ERROR - Could not set up device
mapper for image_store
vdo: vdo.vdomgmnt.Configuration: DEBUG - Configuration is clean, not
persisting
vdo: utils.FileLock: DEBUG - released lock
/run/lock/vdo/_etc_vdoconf.yml.lock
vdo: vdo: ERROR - vdodumpconfig: allocateVDO failed for
'/dev/disk/by-id/scsi-364cd98f05bc87f00242af26c0b2df932' with VDO Status:
Bad magic number

Bad magic number  ERROR was be shown.

 Thanks

-- 
                                                          leon.zhou
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