LVM在线磁盘扩容

一 查看当前系统版本

~# cat /etc/issue
Ubuntu 20.04.3 LTS \n \l

二 查看磁盘使用空间

~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 936M 0 936M 0% /dev
tmpfs 196M 1.9M 195M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 19G 15G 3.2G 83% /
tmpfs 980M 0 980M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock

三 查看可用磁盘空间

~# fdisk -l
Disk /dev/sda: 100 GiB, 107374182400 bytes, 209715200 sectors
Disk model: VMware Virtual S
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 0A2E39E5-3721-4D4A-922A-35437A0D2FE1
Device Start End Sectors Size Type

/dev/sda1 2048 4095 2048 1M BIOS boot

/dev/sda2 4096 2101247 2097152 1G Linux filesystem

/dev/sda3 2101248 41940991 39839744 19G Linux filesystem
Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 18.102 GiB, 20396900352 bytes, 39837696 sectors

Units: sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

四 新建lvm分区

点击查看代码

~# fdisk /dev/sda
Welcome to fdisk (util-linux 2.34).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.GPT PMBR size mismatch (41943039 != 209715199) will be corrected by write.Command (m for help): n

Partition number (4-128, default 4): 4

First sector (41940992-209715166, default 41940992):

Last sector, +/-sectors or +/-size{K,M,G,T,P} (41940992-209715166, default 209715166):Created a new partition 4 of type 'Linux filesystem' and of size 80 GiB.

Command (m for help): t

Partition number (1-4, default 4): 4

Partition type (type L to list all types): L

1 EFI System C12A7328-F81F-11D2-BA4B-00A0C93EC93B

2 MBR partition scheme 024DEE41-33E7-11D3-9D69-0008C781F39F

3 Intel Fast Flash D3BFE2DE-3DAF-11DF-BA40-E3A556D89593

4 BIOS boot 21686148-6449-6E6F-744E-656564454649

5 Sony boot partition F4019732-066E-4E12-8273-346C5641494F

6 Lenovo boot partition BFBFAFE7-A34F-448A-9A5B-6213EB736C22

7 PowerPC PReP boot 9E1A2D38-C612-4316-AA26-8B49521E5A8B

8 ONIE boot 7412F7D5-A156-4B13-81DC-867174929325

9 ONIE config D4E6E2CD-4469-46F3-B5CB-1BFF57AFC149

10 Microsoft reserved E3C9E316-0B5C-4DB8-817D-F92DF00215AE

11 Microsoft basic data EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

12 Microsoft LDM metadata 5808C8AA-7E8F-42E0-85D2-E1E90434CFB3

13 Microsoft LDM data AF9B60A0-1431-4F62-BC68-3311714A69AD

14 Windows recovery environment DE94BBA4-06D1-4D40-A16A-BFD50179D6AC

15 IBM General Parallel Fs 37AFFC90-EF7D-4E96-91C3-2D7AE055B174

16 Microsoft Storage Spaces E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D

17 HP-UX data 75894C1E-3AEB-11D3-B7C1-7B03A0000000

18 HP-UX service E2A1E728-32E3-11D6-A682-7B03A0000000

19 Linux swap 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F

20 Linux filesystem 0FC63DAF-8483-4772-8E79-3D69D8477DE4

21 Linux server data 3B8F8425-20E0-4F3B-907F-1A25A76F98E8

22 Linux root (x86) 44479540-F297-41B2-9AF7-D131D5F0458A

23 Linux root (ARM) 69DAD710-2CE4-4E3C-B16C-21A1D49ABED3

24 Linux root (x86-64) 4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709

25 Linux root (ARM-64) B921B045-1DF0-41C3-AF44-4C6F280D3FAE

26 Linux root (IA-64) 993D8D3D-F80E-4225-855A-9DAF8ED7EA97

27 Linux reserved 8DA63339-0007-60C0-C436-083AC8230908

28 Linux home 933AC7E1-2EB4-4F13-B844-0E14E2AEF915

29 Linux RAID A19D880F-05FC-4D3B-A006-743F0F84911E

30 Linux extended boot BC13C2FF-59E6-4262-A352-B275FD6F7172

31 Linux LVM E6D6D379-F507-44C2-A23C-238F2A3DF928

32 FreeBSD data 516E7CB4-6ECF-11D6-8FF8-00022D09712B

33 FreeBSD boot 83BD6B9D-7F41-11DC-BE0B-001560B84F0F

34 FreeBSD swap 516E7CB5-6ECF-11D6-8FF8-00022D09712B

35 FreeBSD UFS 516E7CB6-6ECF-11D6-8FF8-00022D09712B

36 FreeBSD ZFS 516E7CBA-6ECF-11D6-8FF8-00022D09712B

37 FreeBSD Vinum 516E7CB8-6ECF-11D6-8FF8-00022D09712B

38 Apple HFS/HFS+ 48465300-0000-11AA-AA11-00306543ECAC

39 Apple UFS 55465300-0000-11AA-AA11-00306543ECAC

40 Apple RAID 52414944-0000-11AA-AA11-00306543ECAC

41 Apple RAID offline 52414944-5F4F-11AA-AA11-00306543ECAC

42 Apple boot 426F6F74-0000-11AA-AA11-00306543ECAC

43 Apple label 4C616265-6C00-11AA-AA11-00306543ECAC

44 Apple TV recovery 5265636F-7665-11AA-AA11-00306543ECAC

45 Apple Core storage 53746F72-6167-11AA-AA11-00306543ECAC

46 Solaris boot 6A82CB45-1DD2-11B2-99A6-080020736631

47 Solaris root 6A85CF4D-1DD2-11B2-99A6-080020736631

48 Solaris /usr & Apple ZFS 6A898CC3-1DD2-11B2-99A6-080020736631

49 Solaris swap 6A87C46F-1DD2-11B2-99A6-080020736631

50 Solaris backup 6A8B642B-1DD2-11B2-99A6-080020736631

51 Solaris /var 6A8EF2E9-1DD2-11B2-99A6-080020736631

52 Solaris /home 6A90BA39-1DD2-11B2-99A6-080020736631

53 Solaris alternate sector 6A9283A5-1DD2-11B2-99A6-080020736631

54 Solaris reserved 1 6A945A3B-1DD2-11B2-99A6-080020736631

55 Solaris reserved 2 6A9630D1-1DD2-11B2-99A6-080020736631

56 Solaris reserved 3 6A980767-1DD2-11B2-99A6-080020736631

57 Solaris reserved 4 6A96237F-1DD2-11B2-99A6-080020736631

58 Solaris reserved 5 6A8D2AC7-1DD2-11B2-99A6-080020736631

59 NetBSD swap 49F48D32-B10E-11DC-B99B-0019D1879648

60 NetBSD FFS 49F48D5A-B10E-11DC-B99B-0019D1879648

61 NetBSD LFS 49F48D82-B10E-11DC-B99B-0019D1879648

62 NetBSD concatenated 2DB519C4-B10E-11DC-B99B-0019D1879648

63 NetBSD encrypted 2DB519EC-B10E-11DC-B99B-0019D1879648

64 NetBSD RAID 49F48DAA-B10E-11DC-B99B-0019D1879648

65 ChromeOS kernel FE3A2A5D-4F32-41A7-B725-ACCC3285A309

66 ChromeOS root fs 3CB8E202-3B7E-47DD-8A3C-7FF2A13CFCEC

67 ChromeOS reserved 2E0A753D-9E48-43B0-8337-B15192CB1B5E

68 MidnightBSD data 85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7

69 MidnightBSD boot 85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7

70 MidnightBSD swap 85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7

71 MidnightBSD UFS 0394EF8B-237E-11E1-B4B3-E89A8F7FC3A7

72 MidnightBSD ZFS 85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7

73 MidnightBSD Vinum 85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7

74 Ceph Journal 45B0969E-9B03-4F30-B4C6-B4B80CEFF106

75 Ceph Encrypted Journal 45B0969E-9B03-4F30-B4C6-5EC00CEFF106

76 Ceph OSD 4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D

77 Ceph crypt OSD 4FBD7E29-9D25-41B8-AFD0-5EC00CEFF05D

78 Ceph disk in creation 89C57F98-2FE5-4DC0-89C1-F3AD0CEFF2BE

79 Ceph crypt disk in creation 89C57F98-2FE5-4DC0-89C1-5EC00CEFF2BE

80 VMware VMFS AA31E02A-400F-11DB-9590-000C2911D1B8

81 VMware Diagnostic 9D275380-40AD-11DB-BF97-000C2911D1B8

82 VMware Virtual SAN 381CFCCC-7288-11E0-92EE-000C2911D0B2

83 VMware Virsto 77719A0C-A4A0-11E3-A47E-000C29745A24

84 VMware Reserved 9198EFFC-31C0-11DB-8F78-000C2911D1B8

85 OpenBSD data 824CC7A0-36A8-11E3-890A-952519AD3F61

86 QNX6 file system CEF5A9AD-73BC-4601-89F3-CDEEEEE321A1

87 Plan 9 partition C91818F9-8025-47AF-89D2-F030D7000C2C

88 HiFive Unleashed FSBL 5B193300-FC78-40CD-8002-E86C45580B47

89 HiFive Unleashed BBL 2E54B353-1271-4842-806F-E436D6AF6985Partition type (type L to list all types): 31Changed type of partition 'Linux filesystem' to 'Linux LVM'.
Command (m for help): w

The partition table has been altered.

Syncing disks.

五 验证新建分区

~# fdisk -l
Disk /dev/sda: 100 GiB, 107374182400 bytes, 209715200 sectors
Disk model: VMware Virtual S
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 0A2E39E5-3721-4D4A-922A-35437A0D2FE1
Device Start End Sectors Size Type

/dev/sda1 2048 4095 2048 1M BIOS boot

/dev/sda2 4096 2101247 2097152 1G Linux filesystem

/dev/sda3 2101248 41940991 39839744 19G Linux filesystem

/dev/sda4 41940992 209715166 167774175 80G Linux LVM
Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 18.102 GiB, 20396900352 bytes, 39837696 sectors

Units: sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

六 向lvm组添加物理卷

~# lvm
lvm> vgextend ubuntu-vg /dev/sda4
Volume group "ubuntu-vg" successfully extended
lvm> pvdisplay

--- Physical volume ---

PV Name /dev/sda3

VG Name ubuntu-vg

PV Size <19.00 GiB / not usable 0

Allocatable yes (but full)

PE Size 4.00 MiB

Total PE 4863

Free PE 0

Allocated PE 4863

PV UUID n3d4s7-RxVc-TWvt-ZWsO-fa0F-hyNJ-YCk8Cd"/dev/sda4" is a new physical volume of "80.00 GiB"

--- NEW Physical volume ---

PV Name /dev/sda4

VG Name

PV Size 80.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID 65jmlE-wFu1-nBwy-3Dga-rn2J-WLvQ-2R9levlvm> lvextend -L +79G /dev/mapper/ubuntu--vg-ubuntu--lv

Size of logical volume ubuntu-vg/ubuntu-lv changed from <19.00 GiB (4863 extents) to <98.00 GiB (25087 extents).

Logical volume ubuntu-vg/ubuntu-lv successfully resized.

lvm> pvdisplay

--- Physical volume ---

PV Name /dev/sda3

VG Name ubuntu-vg

PV Size <19.00 GiB / not usable 0

Allocatable yes (but full)

PE Size 4.00 MiB

Total PE 4863

Free PE 0

Allocated PE 4863

PV UUID n3d4s7-RxVc-TWvt-ZWsO-fa0F-hyNJ-YCk8Cd--- Physical volume ---

PV Name /dev/sda4

VG Name ubuntu-vg

PV Size 80.00 GiB / not usable 4.98 MiB

Allocatable yes

PE Size 4.00 MiB

Total PE 20479

Free PE 255

Allocated PE 20224

PV UUID 65jmlE-wFu1-nBwy-3Dga-rn2J-WLvQ-2R9lev
lvm> exit

Exiting.

七 调整文件系统大小

~# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 13
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 25689088 (4k) blocks long.

八 验证可用空间

~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 936M 0 936M 0% /dev
tmpfs 196M 1.9M 195M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 97G 15G 78G 16% /
tmpfs 980M 0 980M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 980M 0 980M 0% /sys/fs/cgroup