LVM扩容

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0.查看pv

[root@QADB ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/sda2
VG Name               VolGroup00
PV Size               99.90 GB / not usable 24.71 MB
Allocatable           yes (but full)
PE Size (KByte)       32768
Total PE              3196
Free PE               0
Allocated PE          3196
PV UUID               6Mbre9-dlVW-j9XM-U5D3-JHEz-Uwu0-jRkR87

"/dev/sda3" is a new physical volume of "100.00 GB"
--- NEW Physical volume ---
PV Name               /dev/sda3
VG Name
PV Size               100.00 GB
Allocatable           NO
PE Size (KByte)       0
Total PE              0
Free PE               0
Allocated PE          0
PV UUID               kc3FWB-m4rh-ZE9N-i73F-z19I-aofW-SLNKfh

1.创建pv

[root@QADB ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created

2.查看vg

[root@QADB ~]# vgdisplay
--- Volume group ---
VG Name               VolGroup00 //就一个vg，需要扩充那个lv就吧这个pv加入到这个lv所在的vg中
System ID
Format                lvm2
Metadata Areas        1
Metadata Sequence No 3
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                2
Open LV               2
Max PV                0
Cur PV                1
Act PV                1
VG Size               99.88 GB
PE Size               32.00 MB
Total PE              3196
Alloc PE / Size       3196 / 99.88 GB
Free PE / Size       0 / 0
VG UUID               eSCXd6-eMpf-e9Dp-WFvf-aajU-UO6T-GnsPCU

3.将pv加入vg

[root@QADB ~]# vgextend VolGroup00 /dev/sda3
Volume group "VolGroup00" successfully extended

4.查看lv

[root@QADB ~]# lvdisplay
--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol00
VG Name                VolGroup00
LV UUID                ORm7dl-3HBN-fOUa-eeiy-2dzb-3Lvm-6iKin1
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                90.47 GB
Current LE             2895
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:0

--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol01
VG Name                VolGroup00
LV UUID                h44MXT-xxyB-waTR-gDAJ-Ej9d-mrDg-dAAM4n
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                9.41 GB
Current LE             301
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

5.扩容lv

a.查看空余的vg空间和预算将要扩容后的lv大小

[root@QADB ~]# vgdisplay
--- Volume group ---
VG Name               VolGroup00
System ID
Format                lvm2
Metadata Areas        2
Metadata Sequence No 4
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                2
Open LV               2
Max PV                0
Cur PV                2
Act PV                2
VG Size               199.84 GB
PE Size               32.00 MB
Total PE              6395
Alloc PE / Size       3196 / 99.88 GB //99.88G已被分配
Free PE / Size       3199 / 99.97 GB //空虚99.97G
VG UUID               eSCXd6-eMpf-e9Dp-WFvf-aajU-UO6T-GnsPCU

[root@QADB ~]# lvdisplay
--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol00             //我要将刚扩充的这个分区划入这个lv中
VG Name                VolGroup00
LV UUID                ORm7dl-3HBN-fOUa-eeiy-2dzb-3Lvm-6iKin1
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                90.47 GB //lv目前大小是90.47，加上上边的free，扩冲后的空间应该约等于90.47+99.97
Current LE             2895
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:0

--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol01
VG Name                VolGroup00
LV UUID                h44MXT-xxyB-waTR-gDAJ-Ej9d-mrDg-dAAM4n
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                9.41 GB
Current LE             301
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

b.扩充lv

[root@QADB ~]# lvextend -L 190G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 190.00 GB
Logical volume LogVol00 successfully resized
[root@QADB ~]# df -h
文件系统              容量已用可用已用% 挂载点
/dev/mapper/VolGroup00-LogVol00
                       88G   67G   17G 81% /
/dev/sda1              99M   13M   82M 14% /boot

tmpfs 3.8G 0 3.8G 0% /dev/shm

[root@QADB ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 49807360 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 49807360 blocks long.

[root@QADB ~]# df -h
文件系统              容量已用可用已用% 挂载点
/dev/mapper/VolGroup00-LogVol00
                      185G   67G 108G 39% /
/dev/sda1              99M   13M   82M 14% /boot
tmpfs                 3.8G     0 3.8G   0% /dev/shm

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迷途小运维随笔

作者：john

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