24 Nov 2014
# 磁盘分区准备 fdisk -l |grep -E "sdb|sdc" Disk /dev/sdb: 10.7 GB, 10737418240 bytes /dev/sdb1 1 654 5253223+ 83 Linux /dev/sdb2 655 974 2570400 83 Linux /dev/sdb3 975 1305 2658757+ 83 Linux Disk /dev/sdc: 3221 MB, 3221225472 bytes /dev/sdc1 1 391 3140676 83 Linux # 提前将分区类型调整为8e(for lvm) fdisk /dev/sdb Command (m for help): t Partition number (1-4): 3 Hex code (type L to list codes): 8e Changed system type of partition 3 to 8e (Linux LVM) Command (m for help): p Disk /dev/sdb: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xd6b2d026 Device Boot Start End Blocks Id System /dev/sdb1 1 654 5253223+ 8e Linux LVM /dev/sdb2 655 974 2570400 8e Linux LVM /dev/sdb3 975 1305 2658757+ 8e Linux LVM Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
# 修改partition type为lvm，并启用 parted /dev/sdc set 1 lvm on parted /dev/sdc print Model: VMware, VMware Virtual S (scsi) Disk /dev/sdc: 3221MB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 3216MB 3216MB primary lvm
# 可用命令 pv [TAB] [TAB] pvchange pvcreate pvmove pvresize pvscan pvck pvdisplay pvremove pvs # 创建物理卷 pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created pvcreate /dev/sdb2 Physical volume "/dev/sdb2" successfully created pvcreate /dev/sdc1 Physical volume "/dev/sdc1" successfully created # 查看物理卷信息 pvs PV VG Fmt Attr PSize PFree /dev/sdb1 lvm2 --- 5.01g 5.01g /dev/sdb2 lvm2 --- 2.45g 2.45g /dev/sdc1 lvm2 --- 3.00g 3.00g pvdisplay /dev/sdb1 "/dev/sdb1" is a new physical volume of "5.01 GiB" --- NEW Physical volume --- PV Name /dev/sdb1 VG Name PV Size 5.01 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID oJ6gdr-1PFL-fTZ0-a6BQ-dy9M-uu2G-xXqsdA
# 可用卷组命令 vg [TAB] [TAB] vgcfgbackup vgconvert vgextend vgmknodes vgs vgcfgrestore vgcreate vgimport vgreduce vgscan vgchange vgdisplay vgimportclone vgremove vgsplit vgck vgexport vgmerge vgrename # 创建卷组 vgcreate vg1 /dev/sdb1 /dev/sdb2 Volume group "vg1" successfully created # 卷组扩容 vgextend vg1 /dev/sdc1 Volume group "vg1" successfully extended # 检查卷组状态 vgs VG #PV #LV #SN Attr VSize VFree vg1 3 0 0 wz--n- 10.45g 10.45g vgdisplay vg1 --- Volume group --- VG Name vg1 System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 3 Act PV 3 VG Size 10.45 GiB PE Size 4.00 MiB Total PE 2675 Alloc PE / Size 0 / 0 Free PE / Size 2675 / 10.45 GiB VG UUID YP3qey-wLFx-m0ZX-Fbkf-B1oG-UqdH-7Qr6Gi
# 可用命令 lv [TAB] [TAB] lvchange lvextend lvmdiskscan lvmsar lvresize lvconvert lvm lvmdump lvreduce lvs lvcreate lvmchange lvmetad lvremove lvscan lvdisplay lvmconf lvmsadc lvrename # vg1上创建一个3G的lv lvcreate -L 3G -n lv01 vg1 Logical volume "lv01" created. # vg1上创建占vg1容量50%的lv02 lvcreate -l 50%VG -n lv02 vg1 Logical volume "lv02" created. # 剩余空间全部分配给lv03 lvcreate -l 100%FREE -n lv03 vg1 Logical volume "lv03" created. # 检查lv状态 lvscan ACTIVE '/dev/vg1/lv01' [3.00 GiB] inherit ACTIVE '/dev/vg1/lv02' [5.22 GiB] inherit ACTIVE '/dev/vg1/lv03' [2.23 GiB] inherit
# 准备pv和vg pvcreate /dev/sdb3 Physical volume "/dev/sdb3" successfully created vgextend vg1 /dev/sdb3 Volume group "vg1" successfully extended # 指定容量扩展空间 lvextend -L +500M /dev/vg1/lv03 Size of logical volume vg1/lv03 changed from 2.23 GiB (570 extents) to 2.71 GiB (695 extents). Logical volume lv03 successfully resized # 扩展剩余所有空间 lvextend -l +100%FREE /dev/vg1/lv03 Size of logical volume vg1/lv03 changed from 2.71 GiB (695 extents) to 4.76 GiB (1218 extents). Logical volume lv03 successfully resized # 查看状态 lvscan ACTIVE '/dev/vg1/lv01' [3.00 GiB] inherit ACTIVE '/dev/vg1/lv02' [5.22 GiB] inherit ACTIVE '/dev/vg1/lv03' [4.76 GiB] inherit