Citrix 虛擬機在線擴容根目錄操做

第一步：查看原來沒擴容以前磁盤的狀況

第二步：    經過xencenter 增長一個 storage    ----------------------400GB

第三步：         fdisk -l查看是否可以看到此storage

由此看出，/dev/xvdb  是沒有被 Linux 利用的 storage

第四步：創建  PV

當出現   Unknown device  時，能夠執行下面這條命令處理

[root@svnbackup ~]# pvs

 Couldn't find device with uuid Xet5se-uATk-zxrY-8BpA-3BLw-AJr1-UYFGcA.

 PV VG Fmt Attr PSize PFree

 /dev/xvda2 VolGroup00 lvm2 a- 99.88G 0

 /dev/xvdb lvm2 a- 400.00G 400.00G

 unknown device VolGroup00 lvm2 a- 399.97G 399.97G

[root@svnbackup ~]# vgreduce --removemissing VolGroup00

 Couldn't find device with uuid Xet5se-uATk-zxrY-8BpA-3BLw-AJr1-UYFGcA.

 Wrote out consistent volume group VolGroup00

[root@svnbackup ~]#

[root@svnbackup ~]# pvs

 PV VG Fmt Attr PSize PFree

 /dev/xvda2 VolGroup00 lvm2 a- 99.88G 0

 /dev/xvdb lvm2 a- 400.00G 400.00G

[root@svnbackup ~]#

而後創建pv

[root@svnbackup ~]# pvcreate /dev/xvdb

刪除    pv

[root@svnbackup ~]# pvremove /dev/xvdb

第五步： 加到已存在的VG組中去

第6步：擴展邏輯卷

[root@svnbackup ~]# lvextend -L +200G /dev/mapper/VolGroup00-LogVol00

 Extending logical volume LogVol00 to 230.00 GB

 Logical volume LogVol00 successfully resized

LV擴容以後須要激活修改的配置

[root@svnbackup ~]# lvextend -L +200G /dev/mapper/VolGroup00-LogVol00

 Extending logical volume LogVol00 to 230.00 GB

 Logical volume LogVol00 successfully resized

[root@svnbackup ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

                      30G 2.3G 26G 8% /

/dev/mapper/VolGroup00-LogVol02

                      60G 372M 57G 1% /data

/dev/xvda1 99M 14M 80M 15% /boot

tmpfs 1.0G 0 1.0G 0% /dev/shm

[root@svnbackup ~]# resize2fs /dev/mapper/VolGroup00-LogVol00 ------------ LV擴容以後須要激活修改

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required

Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 60293120 (4k) blocks.

The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 60293120 blocks long.

第七步： 驗證擴容是否成功

擴容前的大小    /  目錄只有 30G

擴容後的大小     /  目錄擴大爲  230G   (擴容成功)