EXSI6.7 中给虚拟机磁盘扩容

[admin@localhost ~]$ sudo fdisk -l    

Disk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0005871c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   125829119    61864960   8e  Linux LVM
/dev/sda3       125829120   419430399   146800640   8e  Linux LVM

Disk /dev/mapper/centos-root: 38.2 GB, 38235275264 bytes, 74678272 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/centos-swap: 6442 MB, 6442450944 bytes, 12582912 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/centos-home: 18.7 GB, 18668847104 bytes, 36462592 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

6、扩展vg
创建PV

[admin@localhost ~]$ sudo pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.

使用vgs查看

[admin@localhost ~]$ sudo vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   1   3   0 wz--n- <59.00g    0 

7、把sda3加入到LVM组中

[admin@localhost ~]$ sudo vgextend centos /dev/sda3
  Volume group "centos" successfully extended

注意：centos 是vg组名称，请根据具体情况填写

[admin@localhost ~]$ sudo vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   2   3   0 wz--n- 198.99g <140.00g

8、扩展lv
我们把新扩展的100G全部添加到centos-root中

[admin@localhost ~]$ sudo lvextend /dev/mapper/centos-root  /dev/sda3
  Size of logical volume centos/root changed from <35.61 GiB (9116 extents) to <175.61 GiB (44955 extents).
  Logical volume centos/root successfully resized.

使用lvs可以看到 centos-root 已经是140G了，但是…请继续往下看

[admin@localhost ~]$ sudo lvs
  LV   VG     Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  home centos -wi-ao----  <17.39g
  root centos -wi-ao---- <175.61g
  swap centos -wi-ao----    6.00g  

使用df -kh查看，空间并没有变化，look down…

[admin@localhost ~]$ df -khl
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   36G  1.6G   35G   5% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G  8.9M  3.9G   1% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  189M  826M  19% /boot
/dev/mapper/centos-home   18G   33M   18G   1% /home
tmpfs                    783M     0  783M   0% /run/user/1001

9、xfs在线扩容

[admin@localhost ~]$ df -T
Filesystem              Type     1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root xfs       37320904 1616800  35704104   5% /
devtmpfs                devtmpfs   3992828       0   3992828   0% /dev
tmpfs                   tmpfs      4004744       0   4004744   0% /dev/shm
tmpfs                   tmpfs      4004744    9036   3995708   1% /run
tmpfs                   tmpfs      4004744       0   4004744   0% /sys/fs/cgroup
/dev/sda1               xfs        1038336  192612    845724  19% /boot
/dev/mapper/centos-home xfs       18221056   33020  18188036   1% /home
tmpfs                   tmpfs       800952       0    800952   0% /run/user/1001
[admin@localhost ~]$ sudo xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=2333696 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=9334784, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=4558, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 9334784 to 46033920

10、再次确认df状态, 添加的100G空间已经有效

[admin@localhost ~]$ df -kh
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root  176G  1.6G  175G   1% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G  8.9M  3.9G   1% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  189M  826M  19% /boot
/dev/mapper/centos-home   18G   33M   18G   1% /home
tmpfs                    783M     0  783M   0% /run/user/1001