Linux中的LVM之增加容量与删除卷的方法详解

[root@localhost ~]# vgdisplay — Volume group — VG Name VolGroup02 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 7.97 GiB PE Size 32.00 MiB Total PE 255 Alloc PE / Size 0 / 0 Free PE / Size 255 / 7.97 GiB VG UUID SETgjx-dobd-Uayt-AWgN-HKID-hsYe-tEotIS[root@localhost ~]# lvcreate -L7.97 -n LogVol00 VolGroup02 Rounding up size to full physical extent 32.00 MiB Logical volume \”LogVol00\” created[root@localhost ~]# mkfs -t ext4 /dev/VolGroup02/LogVol00mke2fs 1.41.12 (17-May-2010)Filesystem label=OS type: LinuxBlock size=1024 (log=0)Fragment size=1024 (log=0)Stride=0 blocks, Stripe width=0 blocks8192 inodes, 32768 blocks1638 blocks (5.00%) reserved for the super userFirst data block=1Maximum filesystem blocks=335544324 block groups8192 blocks per group, 8192 fragments per group2048 inodes per groupSuperblock backups stored on blocks: 8193, 24577 Writing inode tables: done Creating journal (4096 blocks): doneWriting superblocks and filesystem accounting information: done This filesystem will be automatically checked every 23 mounts or180 days, whichever comes first. Use tune2fs -c or -i to override.[root@localhost ~]# cd /[root@localhost /]# mkdir /u01[root@localhost /]# mount /dev/VolGroup02/LogVol00 /u01[root@localhost /]# vi /etc/fstab ## /etc/fstab# Created by anaconda on Mon Aug 17 15:08:21 2015## Accessible filesystems, by reference, are maintained under \’/dev/disk\’# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info#UUID=3440ad55-6486-45ed-876f-e942b08013bf / ext4 defaults 1 1UUID=d3abb655-db70-4c42-967d-57c421abfda0 /boot ext4 defaults 1 2UUID=660624ff-335d-42ca-b779-f130a80d9da8 /home ext4 defaults 1 2UUID=6f534bf0-e486-4937-84ae-ed1221cf34f1 swap swap defaults 0 0/dev/VolGroup02/LogVol00 /u01 ext4 defaults 1 1tmpfs /dev/shm tmpfs defaults 0 0devpts /dev/pts devpts gid=5,mode=620 0 0sysfs /sys sysfs defaults 0 0proc /proc proc defaults 0 0

[root@localhost ~]# lvscan ACTIVE \’/dev/VolGroup02/LogVol00\’ [32.00 MiB] inherit[root@localhost ~]# lvdisplay /dev/VolGroup02/LogVol00 — Logical volume — LV Path /dev/VolGroup02/LogVol00 LV Name LogVol00 VG Name VolGroup02 LV UUID OCHwx1-EL9P-6C5J-RNuz-2Xu5-4215-H3xt5s LV Write Access read/write LV Creation host, time localhost.localdomain, 2015-09-01 10:50:10 +0800 LV Status available # open 1 LV Size 32.00 MiB Current LE 1 Segments 1 Allocation inherit Read ahead sectors auto – currently set to 256 Block device 253:0 [root@localhost ~]# lvresize -L +7.89G /dev/VolGroup02/LogVol00 Rounding size to boundary between physical extents: 7.91 GiB Size of logical volume VolGroup02/LogVol00 changed from 32.00 MiB (1 extents) to 7.94 GiB (254 extents). Logical volume LogVol00 successfully resized

[root@localhost ~]# resize2fs -p /dev/VolGroup02/LogVol00resize2fs 1.41.12 (17-May-2010)Filesystem at /dev/VolGroup02/LogVol00 is mounted on /u01; on-line resizing requiredold desc_blocks = 1, new_desc_blocks = 32Performing an on-line resize of /dev/VolGroup02/LogVol00 to 8323072 (1k) blocks.The filesystem on /dev/VolGroup02/LogVol00 is now 8323072 blocks long. [root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 27G 6.0G 20G 24% /tmpfs 5.9G 0 5.9G 0% /dev/shm/dev/sda1 477M 32M 420M 8% /boot/dev/sdb1 99G 60M 94G 1% /home/dev/mapper/VolGroup02-LogVol00 7.7G 2.7M 7.3G 1% /u01

[root@localhost u01]# fdisk -l Disk /dev/sda: 42.9 GB, 42949672960 bytes64 heads, 32 sectors/track, 40960 cylindersUnits = cylinders of 2048 * 512 = 1048576 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x000462cf Device Boot Start End Blocks Id System/dev/sda1 * 2 501 512000 83 LinuxPartition 1 does not end on cylinder boundary./dev/sda2 502 28672 28847104 83 LinuxPartition 2 does not end on cylinder boundary./dev/sda3 28673 40960 12582912 82 Linux swap / SolarisPartition 3 does not end on cylinder boundary. Disk /dev/sdc: 8589 MB, 8589934592 bytes64 heads, 32 sectors/track, 8192 cylindersUnits = cylinders of 2048 * 512 = 1048576 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x98c391fe Device Boot Start End Blocks Id System/dev/sdc1 1 8192 8388592 83 Linux Disk /dev/sdb: 107.4 GB, 107374182400 bytes255 heads, 63 sectors/track, 13054 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x0002488e Device Boot Start End Blocks Id System/dev/sdb1 1 13055 104856576 83 Linux Disk /dev/mapper/VolGroup02-LogVol00: 33 MB, 33554432 bytes255 heads, 63 sectors/track, 4 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x00000000

[root@localhost ~]# fdisk -l Disk /dev/sda: 128.8 GB, 128849018880 bytes255 heads, 63 sectors/track, 15665 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sda1 * 1 13 104391 83 Linux/dev/sda2 14 10443 83778975 8e Linux LVM/dev/sda3 10444 15665 41945715 83 Linux[root@localhost ~]# vgscan Reading all physical volumes. This may take a while… Found volume group \”VolGroup00\” using metadata type lvm2[root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] PV /dev/sda3 VG VolGroup00 lvm2 [40.00 GB / 40.00 GB free] Total: 2 [119.88 GB] / in use: 2 [119.88 GB] / in no VG: 0 [0 ][root@localhost ~]# pvdisplay — Physical volume — PV Name /dev/sda2 VG Name VolGroup00 PV Size 79.90 GB / not usable 23.41 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 2556 Free PE 0 Allocated PE 2556 PV UUID YGtB2J-ZKJr-mV62-NluQ-2DGy-vuUT-cCc1lo — Physical volume — PV Name /dev/sda3 VG Name VolGroup00 PV Size 40.00 GB / not usable 2.61 MB Allocatable yes PE Size (KByte) 32768 Total PE 1280 Free PE 1280 Allocated PE 0 PV UUID wsnv13-7j1H-SH8q-hl6k-HpNc-x4WU-gM7LzW [root@localhost ~]# lvscan ACTIVE \’/dev/VolGroup00/LogVol00\’ [77.91 GB] inherit ACTIVE \’/dev/VolGroup00/LogVol01\’ [1.97 GB] inherit[root@localhost ~]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert LogVol00 VolGroup00 -wi-ao 77.91G LogVol01 VolGroup00 -wi-ao 1.97G

[root@localhost ~]# vgreduce VolGroup00 /dev/sda3 Removed \”/dev/sda3\” from volume group \”VolGroup00\” [root@localhost ~]#

[root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] PV /dev/sda3 lvm2 [40.00 GB] Total: 2 [119.88 GB] / in use: 1 [79.88 GB] / in no VG: 1 [40.00 GB][root@localhost ~]# pvs PV VG Fmt Attr PSize PFree /dev/sda2 VolGroup00 lvm2 a- 79.88G 0 /dev/sda3 lvm2 a- 40.00G 40.00G[root@localhost ~]# pvremove /dev/sda3 Labels on physical volume \”/dev/sda3\” successfully wiped[root@localhost ~]# pvscan PV /dev/sda2 VG VolGroup00 lvm2 [79.88 GB / 0 free] Total: 1 [79.88 GB] / in use: 1 [79.88 GB] / in no VG: 0 [0 ]