上篇是lv卷的大小扩容，本篇是怎样给卷组增加容量和对lv在线扩容
增加磁盘（略）
快速分区
[root@aiker01 ~]# fdisk /dev/sdb
Command (m for help): n
All primary partitions are in use
Adding logical partition 8
First sector (25176064-41943039, default 25176064):
Using default value 25176064
Last sector, +sectors or +size{K,M,G} (25176064-41943039, default 41943039): +2G
Partition 8 of type Linux and of size 2 GiB is set
Command (m for help): t
Partition number (1-8, default 8):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
手动更新分区表
[root@aiker01 ~]# partprobe
列出分区
**[root@aiker01 ~]# parted -l
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 2149MB 2147MB primary lvm
2 2149MB 4296MB 2147MB primary lvm
3 4296MB 6443MB 2147MB primary lvm
4 6443MB 21.5GB 15.0GB extended
5 6445MB 8592MB 2147MB logical lvm
6 8593MB 10.7GB 2147MB logical lvm
7 10.7GB 12.9GB 2147MB logical lvm
8 12.9GB 15.0GB 2147MB logical lvm**
创建PV
[root@aiker01 ~]# pvcreate /dev/sdb8
Physical volume "/dev/sdb8" successfully created.
**vg扩展**
[root@aiker01 ~]# vgextend vg1 /dev/sdb8
Volume group "vg1" successfully extended[root@aiker01 ~]# vgdisplay vg1
--- Volume group ---
VG Name vg1
System ID
Format lvm2
Metadata Areas 4
Metadata Sequence No 26
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 4
Act PV 4
VG Size 7.98 GiB
PE Size 4.00 MiB
Total PE 2044
Alloc PE / Size 1152 / 4.50 GiB
Free PE / Size 892 / 3.48 GiB
VG UUID dx3XD9-rQBV-QtBu-EebN-wgjI-CQcn-36iIbmlv扩容
这里是比较简单的扩容，直接把新分区给加了进去
[root@aiker01 ~]# lvextend /dev/vg1/lv1 /dev/sdb8
Size of logical volume vg1/lv1 changed from 4.50 GiB (1152 extents) to <6.50 GiB (1663 extents).
Logical volume vg1/lv1 successfully resized.
[root@aiker01 ~]# lvdisplay /dev/vg1/lv1
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID q6dAzJ-1dbC-2EoY-Fzcp-QqEE-enuU-FS5BLT
LV Write Access read/write
LV Creation host, time aiker01, 2017-12-06 03:02:40 +0800
LV Status available
# open 1
LV Size <6.50 GiB
Current LE 1663
Segments 4
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:4 更新lv挂载卷前
[root@aiker01 ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/cl-root xfs 8.6G 5.3G 3.4G 62% /
devtmpfs devtmpfs 2.4G 0 2.4G 0% /dev
tmpfs tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs tmpfs 2.4G 8.7M 2.4G 1% /run
tmpfs tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup
/dev/mapper/cl-home xfs 4.0G 33M 4.0G 1% /home
/dev/mapper/cl-var xfs 3.0G 159M 2.8G 6% /var
/dev/sda2 xfs 497M 132M 366M 27% /boot
tmpfs tmpfs 479M 0 479M 0% /run/user/0
/dev/mapper/vg2-lv2 ext4 3.9G 16M 3.7G 1% /data
/dev/mapper/vg1-lv1 ext4 4.4G 16M 4.2G 1% /mnt更新lv挂载信息（这步很重要）
[root@aiker01 ~]# resize2fs /dev/mapper/vg1-lv1 #xfs文件系统不适用，xfs文件系统需要执行xfs_growfs /dev/vg1/lv1 xfs
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/mapper/vg1-lv1 is mounted on /mnt; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/mapper/vg1-lv1 is now 1702912 blocks long.更新后
[root@aiker01 ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/cl-root xfs 8.6G 5.3G 3.4G 62% /
devtmpfs devtmpfs 2.4G 0 2.4G 0% /dev
tmpfs tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs tmpfs 2.4G 8.7M 2.4G 1% /run
tmpfs tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup
/dev/mapper/cl-home xfs 4.0G 33M 4.0G 1% /home
/dev/mapper/cl-var xfs 3.0G 159M 2.8G 6% /var
/dev/sda2 xfs 497M 132M 366M 27% /boot
tmpfs tmpfs 479M 0 479M 0% /run/user/0
/dev/mapper/vg2-lv2 ext4 3.9G 16M 3.7G 1% /data
/dev/mapper/vg1-lv1 ext4 6.4G 18M 6.1G 1% /mnt
[root@aiker01 ~]# ll /mnt/
total 36
-rw-r--r-- 1 root root 9 Dec 7 02:26 1.txt
-rw-r--r-- 1 root root 9 Dec 7 02:26 2.txt
drwxr-xr-x 2 root root 4096 Dec 7 02:34 6
[root@aiker01 ~]# cat /mnt/1.txt
12345678
本文转自 喵来个鱼 51CTO博客，原文链接：http://blog.51cto.com/m51cto/2048558，如需转载请自行联系原作者
