lvm 通过扩容本身磁盘容量扩容

原创

freeterman 2015-10-08 15:51:26 博主文章分类：linux ©著作权

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场景：sdb之前是3G容量，现在扩容了sdb的容量到8G。现在把新扩容的5G容量扩展到现有的逻辑卷中

[root@localhost ~]# pvresize /dev/sdb
Physical volume "/dev/sdb" changed
1 physical volume(s) resized / 0 physical volume(s) not resized

[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/sdb
VG Name               domuvg
PV Size               8.00 GiB / not usable 3.00 MiB
Allocatable           yes
PE Size               4.00 MiB
Total PE              2047
Free PE               1280
Allocated PE          767
PV UUID               Do2B23-Mg1v-z5JX-6NoJ-sXIk-Smwy-uR7IoE

[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name               domuvg
System ID
Format                lvm2
Metadata Areas        1
Metadata Sequence No 6
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               8.00 GiB
PE Size               4.00 MiB
Total PE              2047
Alloc PE / Size       767 / 3.00 GiB
Free PE / Size       1280 / 5.00 GiB
VG UUID               4Shwbf-0m2N-3icW-cEil-6W5x-JNLS-bXCZ7W

[root@localhost ~]# lvextend -l +100%FREE /dev/domuvg/alidata
Size of logical volume domuvg/alidata changed from 2.00 GiB (511 extents) to 7.00 GiB (1791 extents).
Logical volume alidata successfully resized

[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Path                /dev/domuvg/swap
LV Name                swap
VG Name                domuvg
LV UUID                xZdi63-3wLm-rKE5-1EYh-0Q7p-bHZM-oibkoj
LV Write Access        read/write
LV Creation host, time localhost.localdomain, 2015-10-08 15:10:14 +0800
LV Status              available
# open                 1
LV Size                1.00 GiB
Current LE             256
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:0

--- Logical volume ---
LV Path                /dev/domuvg/alidata
LV Name                alidata
VG Name                domuvg
LV UUID                g2pjLY-epuy-2Ba0-eBLc-EjIr-sSAO-mt8VOF
LV Write Access        read/write
LV Creation host, time localhost.localdomain, 2015-10-08 15:10:15 +0800
LV Status              available
# open                 1
LV Size                7.00 GiB
Current LE             1791
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:1

[root@localhost ~]# resize2fs /dev/domuvg/alidata
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/domuvg/alidata is mounted on /alidata; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/domuvg/alidata to 1833984 (4k) blocks.
The filesystem on /dev/domuvg/alidata is now 1833984 blocks long.

[root@localhost ~]# df -Ph
Filesystem                  Size Used Avail Use% Mounted on
/dev/sda2                   7.3G 1020M 5.9G 15% /
tmpfs                       939M     0 939M   0% /dev/shm
/dev/mapper/domuvg-alidata 6.9G 4.5M 6.6G   1% /alidata