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datto / dattobd

kernel module for taking block-level snapshots and incremental backups of Linux block devices
GNU General Public License v2.0
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Snapshot creation problem linux centos-7 #203

Closed yzj0911 closed 5 years ago

yzj0911 commented 5 years ago

[root@localhost dattobd]# dbdctl setup-snapshot /dev/sda1 /.datto 0 driver returned an error performing specified action. check dmesg for more info: Invalid argument

dmesg

[ 1391.331992] dattobd: loading out-of-tree module taints kernel. [ 1391.332256] dattobd: module verification failed: signature and/or required key missing - tainting kernel [ 1410.928474] datto: '/.datto' is not on 'sda1': -22 [ 1410.928478] datto: error setting up cow manager: -22 [ 1410.928489] datto: error setting up tracer as active snapshot: -22 [ 1410.928492] datto: error during setup ioctl handler: -22 [ 1423.210085] datto: '/.datto' is not on 'sda1': -22 [ 1423.210089] datto: error setting up cow manager: -22 [ 1423.210104] datto: error setting up tracer as active snapshot: -22 [ 1423.210108] datto: error during setup ioctl handler: -22 [ 1871.791509] datto: '/.datto' is not on 'sda1': -22 [ 1871.791514] datto: error setting up cow manager: -22 [ 1871.791526] datto: error setting up tracer as active snapshot: -22 [ 1871.791529] datto: error during setup ioctl handler: -22 [ 2801.437176] datto: error creating/opening file '/var/backup/datto' - -2: -2 [ 2801.437180] datto: error opening file: -2 [ 2801.437182] datto: error during cow manager initialization: -2 [ 2801.437185] datto: error setting up cow manager: -2 [ 2801.437187] datto: error setting up tracer as active snapshot: -2 [ 2801.437191] datto: error during setup ioctl handler: -2 [ 2845.493962] datto: '/var/backup/datto' is not on 'sda1': -22 [ 2845.493967] datto: error setting up cow manager: -22 [ 2845.493978] datto: error setting up tracer as active snapshot: -22 [ 2845.493981] datto: error during setup ioctl handler: -22 [ 2887.494115] datto: error creating/opening file '/var/backup/datto' - -21: -21 [ 2887.494118] datto: error opening file: -21 [ 2887.494119] datto: error during cow manager initialization: -21 [ 2887.494121] datto: error setting up cow manager: -21 [ 2887.494122] datto: error setting up tracer as active snapshot: -21 [ 2887.494123] datto: error during setup ioctl handler: -21 [ 2897.108504] datto: '/var/backup/datto' is not on 'sda1': -22 [ 2897.108508] datto: error setting up cow manager: -22 [ 2897.108519] datto: error setting up tracer as active snapshot: -22 [ 2897.108523] datto: error during setup ioctl handler: -22 [ 2908.491704] datto: '/var/backup/datto' is not on 'sda1': -22 [ 2908.491708] datto: error setting up cow manager: -22 [ 2908.491718] datto: error setting up tracer as active snapshot: -22 [ 2908.491721] datto: error during setup ioctl handler: -22 [ 3014.897575] datto: '/var/backup/datto' is not on 'sda1': -22 [ 3014.897579] datto: error setting up cow manager: -22 [ 3014.897589] datto: error setting up tracer as active snapshot: -22 [ 3014.897591] datto: error during setup ioctl handler: -22 [ 3197.961576] datto: error during setup ioctl handler: -2 [ 3807.859327] datto: error during setup ioctl handler: -2 [ 3816.415668] datto: '/.datto' is not on 'sda1': -22 [ 3816.415672] datto: error setting up cow manager: -22 [ 3816.415683] datto: error setting up tracer as active snapshot: -22 [ 3816.415686] datto: error during setup ioctl handler: -22 [ 3831.220646] datto: error during setup ioctl handler: -15 [ 3866.963317] datto: error during setup ioctl handler: -15 [ 3872.502385] datto: '/.datto' is not on 'sda1': -22 [ 3872.502388] datto: error setting up cow manager: -22 [ 3872.502397] datto: error setting up tracer as active snapshot: -22 [ 3872.502400] datto: error during setup ioctl handler: -22

[root@localhost dattobd]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 470M 0 470M 0% /dev tmpfs 487M 0 487M 0% /dev/shm tmpfs 487M 8.5M 478M 2% /run tmpfs 487M 0 487M 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 4.6G 13G 27% / /dev/sda1 1014M 154M 861M 16% /boot tmpfs 98M 72K 98M 1% /run/user/0

[root@localhost dattobd]# blkid /dev/mapper/centos-root: UUID="cd0d30bf-5bbd-46f3-b076-014811be5351" TYPE="xfs" /dev/sda2: UUID="Memd0u-cz7M-PUml-0um1-mAv0-gEy0-CmdE47" TYPE="LVM2_member" /dev/sda1: UUID="a324b828-a926-4c4a-a0ec-ccca7dfcbbe6" TYPE="xfs" /dev/mapper/centos-swap: UUID="4859267f-ff4a-4468-82a6-4f1f1a8f76e6" TYPE="swap"

[root@localhost dattobd]# uname -r 3.10.0-1062.el7.x86_64

crawfxrd commented 5 years ago 
dbdctl setup-snapshot /dev/sda1 /.datto 0

The error in dmesg tells you what is wrong:

datto: '/.datto' is not on 'sda1': -22

/dev/sda1 is /boot. The backing file must exists on this device. e.g.,

dbdctl setup-snapshot /dev/sda1 /boot/.datto 0