Antes de atualizar meu servidor do Debian Jessie para o Debian Stretch, eu criei um instantâneo LVM2 do meu rootfs ( /
).
Veja como o meu armazenamento se parece atualmente de acordo com várias ferramentas. /dev/intraid/root
é meu rootfs original e /dev/intraid/root-snapshot
é o instantâneo:
$ sudo lvdisplay
--- Logical volume ---
LV Path /dev/intraid/root
LV Name root
VG Name intraid
LV UUID 0d5hwZ-07Lv-3Yxb-cff3-95za-Rrcx-9y6eQv
LV Write Access read/write
LV Creation host, time newsrv, 2015-05-26 09:32:04 +0800
LV snapshot status source of
root-snapshot [active]
LV Status available
# open 1
LV Size 3.18 TiB
Current LE 834465
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/intraid/root-snapshot
LV Name root-snapshot
VG Name intraid
LV UUID A9sjTI-gcV8-WTLi-wZ0I-J7O6-4hdc-AQSxZj
LV Write Access read/write
LV Creation host, time newsrv, 2018-05-04 19:25:12 +0800
LV snapshot status active destination for root
LV Status available
# open 1
LV Size 3.18 TiB
Current LE 834465
COW-table size 180.00 GiB
COW-table LE 46080
Allocated to snapshot 57.08%
Snapshot chunk size 4.00 KiB
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
$ lsblk -t
sdf 0 4096 0 4096 512 1 cfq 128 128 0B
├─sdf1 0 4096 0 4096 512 1 cfq 128 128 0B
├─sdf2 0 4096 0 4096 512 1 cfq 128 128 0B
│ └─md0 0 4096 0 4096 512 1 128 128 0B
│ ├─intraid-root-real 0 4096 0 4096 512 1 128 128 0B
│ │ ├─intraid-root 0 4096 0 4096 512 1 128 128 0B
│ │ └─intraid-root--snapshot 0 4096 0 4096 512 1 128 128 0B
│ └─intraid-root--snapshot-cow 0 4096 0 4096 512 1 128 128 0B
│ └─intraid-root--snapshot 0 4096 0 4096 512 1 128 128 0B
└─sdf3 0 4096 0 4096 512 1 cfq 128 128 0B
sdg 0 4096 0 4096 512 1 cfq 128 128 0B
├─sdg1 0 4096 0 4096 512 1 cfq 128 128 0B
├─sdg2 0 4096 0 4096 512 1 cfq 128 128 0B
│ └─md0 0 4096 0 4096 512 1 128 128 0B
│ ├─intraid-root-real 0 4096 0 4096 512 1 128 128 0B
│ │ ├─intraid-root 0 4096 0 4096 512 1 128 128 0B
│ │ └─intraid-root--snapshot 0 4096 0 4096 512 1 128 128 0B
│ └─intraid-root--snapshot-cow 0 4096 0 4096 512 1 128 128 0B
│ └─intraid-root--snapshot 0 4096 0 4096 512 1 128 128 0B
└─sdg3 0 4096 0 4096 512 1 cfq 128 128 0B
$ sudo blkid
/dev/sdf1: UUID="C622-1FAD" TYPE="vfat" PARTUUID="3d63a1ce-dd19-4396-9f9c-7894a4e9b256"
/dev/sdf2: UUID="3eb2349d-df83-c9a5-7151-9bdcb40449f8" UUID_SUB="b04a81da-8279-8ade-130d-65478f415085" LABEL="newsrv:0" TYPE="linux_raid_member" PARTUUID="607b2070-1de3-4e58-89f4-401d3144d52c"
/dev/sdf3: UUID="9b8fb3d2-4bb3-4a48-8b26-23af503b9d28" TYPE="swap" PARTUUID="8778cdc1-1fd8-4af0-b7a0-9dbca0d137fa"
/dev/sdg1: UUID="C623-571D" TYPE="vfat" PARTUUID="56f5dc2f-0562-4590-a54d-8c705dfef79f"
/dev/sdg2: UUID="3eb2349d-df83-c9a5-7151-9bdcb40449f8" UUID_SUB="8370e4ce-6b8b-5cdf-1043-60e748758898" LABEL="newsrv:0" TYPE="linux_raid_member" PARTUUID="ee82035a-6e8a-4bb8-9828-336ee85d3afd"
/dev/sdg3: UUID="a3062d00-d91b-490d-b366-7cfbfb42c09d" TYPE="swap" PARTUUID="fb6b3047-bfd4-4502-97ba-1a58197e75f4"
/dev/md0: UUID="44gLpv-engQ-I0KW-VJ0e-2Q6Z-OCeI-m0HSWq" TYPE="LVM2_member"
/dev/mapper/intraid-root: UUID="a96458d1-87d6-4cf6-a004-7b8ceb3ae31f" TYPE="xfs"
/dev/mapper/intraid-root--snapshot: UUID="a96458d1-87d6-4cf6-a004-7b8ceb3ae31f" TYPE="xfs"
$ mount
/dev/mapper/intraid-root on / type xfs (rw,relatime,attr2,inode64,noquota)
/dev/mapper/intraid-root on /srv/matlab_chroot/usr/local/MATLAB type xfs (rw,relatime,attr2,inode64,noquota)
/dev/mapper/intraid-root on /srv/matlab_chroot/shared_home type xfs (rw,relatime,attr2,inode64,noquota)
/dev/sdf1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro)
/dev/mapper/intraid-root on /srv/matlab_chroot/mnt/nethome-new type xfs (rw,relatime,attr2,inode64,noquota)
$ sudo lsof /dev/mapper/intraid-root--snapshot
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
grub-moun 218357 root 3r BLK 253,3 0x32ee7fe0000 2115 /dev/mapper/../dm-3
$ sudo lsof /dev/intraid/root-snapshot
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
grub-moun 218357 root 3r BLK 253,3 0x32ee7fe0000 2115 /dev/intraid/../dm-3
$ sudo lsof /dev/mapper/intraid-root--snapshot-cow
$ sudo lsof /dev/mapper/intraid-root-real
$ findmnt
TARGET SOURCE FSTYPE OPTIONS
/ /dev/mapper/intraid-root xfs rw,relatime,attr2,inode64,noquota
├─/srv/matlab_chroot/usr/local/MATLAB /dev/mapper/intraid-root[/usr/local/MATLAB]
│ xfs rw,relatime,attr2,inode64,noquota
├─/srv/matlab_chroot/shared_home /dev/mapper/intraid-root[/home] xfs rw,relatime,attr2,inode64,noquota
├─/srv/matlab_chroot/mnt/nethome-new /dev/mapper/intraid-root[/mnt/nethome-new]
Observe que o instantâneo não é montado de acordo com a saída de mount
.
No entanto, quando tento eliminar o instantâneo, recebo esta mensagem:
$ sudo lvremove -f intraid/root-snapshot
Logical volume intraid/root-snapshot in use.
O que devo fazer para que eu possa descartá-lo?