怎样扩容usr目录的磁盘空间 centos7.3

2020-06-17 社会 74阅读

vmware下,centos6,64位版本,原来系统默认分区,/dev/sda3是LogVol01,挂载到/上.新添加一个30G的硬盘sdb,将新加的硬盘容量扩充到原来的/上去.


试验步骤:


  1. sdb分区,只分一个sdb1

  2. 2.在sdb1上创建pv

  3. pvcreate /dev/sdb1

  4. 复制代码

  5. 显示下pv的情况

  6. [root@localhost ~]# pvdisplay

  7. --- Physical volume ---

  8. PV Name /dev/sda3

  9. VG Name VolGroup

  10. PV Size 18.80 GiB / not usable 3.00 MiB

  11. Allocatable yes (but full)

  12. PE Size 4.00 MiB

  13. Total PE 4813

  14. Free PE 0

  15. Allocated PE 4813

  16. PV UUID r3DcdH-tavS-z0dy-bTcg-F5fz-F8MF-dpAjW3

"/dev/sdb1" is a new physical volume of "30.00 GiB"

--- NEW Physical volume ---

PV Name /dev/sdb1

VG Name

PV Size 30.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID 1Ynxmw-JblF-XAeE-ZKGD-0BSV-s7BL-SU1mql


3.查看系统现在vg的情况

[root@localhost ~]# vgdisplay

--- Volume group ---

VG Name VolGroup

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 18.80 GiB

PE Size 4.00 MiB

Total PE 4813

Alloc PE / Size 4813 / 18.80 GiB

Free PE / Size 0 / 0

VG UUID Xdh5kq-vKjk-nroE-Dssd-mi1h-SQGK-R07tOn


4.扩容vg

vgextend VolGroup /dev/sdb1

复制代码

正常会提示:Volume group "VolGroup" successfully extended


5.检查下扩容后vg的情况

[root@localhost ~]# vgdisplay

--- Volume group ---

VG Name VolGroup

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 48.80 GiB

PE Size 4.00 MiB

Total PE 12492

Alloc PE / Size 4813 / 18.80 GiB

Free PE / Size 7679 / 30.00 GiB

VG UUID Xdh5kq-vKjk-nroE-Dssd-mi1h-SQGK-R07tOn


6.查看下系统lv的情况

[root@localhost ~]# lvdisplay

--- Logical volume ---

LV Name /dev/VolGroup/LogVol01

VG Name VolGroup

LV UUID IUVeUw-2bmN-mm3H-Gh16-fKaR-choS-IfSosr

LV Write Access read/write

LV Status available

# open 1

LV Size 16.80 GiB

Current LE 4301

Segments 1

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:0


--- Logical volume ---

LV Name /dev/VolGroup/LogVol00

VG Name VolGroup

LV UUID U9WYdb-xAdg-tCe1-FPxo-UyVe-v5Gp-a8UlZR

LV Write Access read/write

LV Status available

# open 1

LV Size 2.00 GiB

Current LE 512

Segments 1

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:1


7.扩容lv

[root@localhost ~]# lvextend /dev/VolGroup/LogVol01 /dev/sdb1

Extending logical volume LogVol01 to 46.80 GiB

Logical volume LogVol01 successfully resized


8.检查下扩容后的lv

[root@localhost ~]# lvdisplay

--- Logical volume ---

LV Name /dev/VolGroup/LogVol01

VG Name VolGroup

LV UUID IUVeUw-2bmN-mm3H-Gh16-fKaR-choS-IfSosr

LV Write Access read/write

LV Status available

# open 1

LV Size 46.80 GiB

Current LE 11980

Segments 2

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:0


--- Logical volume ---

LV Name /dev/VolGroup/LogVol00

VG Name VolGroup

LV UUID U9WYdb-xAdg-tCe1-FPxo-UyVe-v5Gp-a8UlZR

LV Write Access read/write

LV Status available

# open 1

LV Size 2.00 GiB

Current LE 512

Segments 1

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:1


9.现在系统的分区情况如下,/没有扩容

[root@localhost ~]# df -h

文件系统 容量 已用 可用 已用%% 挂载点

/dev/mapper/VolGroup-LogVol01

17G 8.3G 7.5G 53% /

tmpfs 499M 0 499M 0% /dev/shm

/dev/sda1 194M 25M 159M 14% /boot


10.将/扩容

[root@localhost ~]# resize2fs /dev/mapper/VolGroup-LogVol01

resize2fs 1.41.12 (17-May-2010)

Filesystem at /dev/mapper/VolGroup-LogVol01 is mounted on /; on-line resizing required

old desc_blocks = 2, new_desc_blocks = 3

Performing an on-line resize of /dev/mapper/VolGroup-LogVol01 to  (4k) blocks.

The filesystem on /dev/mapper/VolGroup-LogVol01 is now  blocks long.


11.扩容后分区的情况

[root@localhost ~]# df -h

文件系统 容量 已用 可用 已用%% 挂载点

/dev/mapper/VolGroup-LogVol01

47G 8.3G 36G 19% /

tmpfs 499M 0 499M 0% /dev/shm

/dev/sda1 194M 25M 159M 14% /boot


可以看到 /分区已经成功的从18G+,扩充到了47G

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