1、登录到EVE

输入df -h查看一下/dev/mapper/eve--ng--vg-root这个文件目录，这里就是存放镜像的。

 2、EVE关机编辑EVE虚拟机

如下图扩展目前的容量：

 然后点击扩展，扩展完毕之后，会提示：磁盘已成功扩展，您必须从客户及操作系统内部对磁盘重新进行分区和扩展文件系统。

注意：你无法扩展具有快照的虚机中的磁盘，必须删除快照。

3、EVE系统层面增加对磁盘出重新配置

我这里分配的是200G

root@eve-ng:~# fdisk -l
Disk /dev/ram0: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

.......

Disk /dev/sda: 200 GiB, 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
Disklabel type: dos
Disk identifier: 0x3e3ca055

Device     Boot   Start      End  Sectors  Size Id Type   //磁盘分区情况
/dev/sda1  *       2048   999423   997376  487M 83 Linux
/dev/sda2       1001470 83884031 82882562 39.5G  5 Extended
/dev/sda5       1001472 83884031 82882560 39.5G 8e Linux LVM


Disk /dev/mapper/eve--ng--vg-root: 38.6 GiB, 41406169088 bytes, 80871424 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/eve--ng--vg-swap_1: 980 MiB, 1027604480 bytes, 2007040 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

给硬盘sda分区：

root@eve-ng:~# fdisk /dev/sda

Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): n
Partition type
   p   primary (1 primary, 1 extended, 2 free)
   l   logical (numbered from 5)
Select (default p): p
Partition number (3,4, default 3): 3
First sector (999424-419430399, default 999424): 83884032       //sda3的start sector值是sda2的end sector + 1 ，因为sda1和sda2中间有一些sector没使用，所以First sector提示的默认值为999424            
Last sector, +sectors or +size{K,M,G,T,P} (83884032-419430399, default 419430399): （直接回车）

Created a new partition 3 of type 'Linux' and of size 160 GiB.

Command (m for help): p
Disk /dev/sda: 200 GiB, 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
Disklabel type: dos
Disk identifier: 0x3e3ca055

Device     Boot    Start       End   Sectors  Size Id Type
/dev/sda1  *        2048    999423    997376  487M 83 Linux
/dev/sda2        1001470  83884031  82882562 39.5G  5 Extended
/dev/sda3       83884032 419430399 335546368  160G 83 Linux
/dev/sda5        1001472  83884031  82882560 39.5G 8e Linux LVM

Partition table entries are not in disk order.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

root@eve-ng:~# reboot //重启，使得分区生效

将sda3加入到Volume group（VG）中：

查看VG名字：

root@eve-ng:~# vgdisplay
  --- Volume group ---
  VG Name               eve-ng-vg
  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               39.52 GiB
  PE Size               4.00 MiB
  Total PE              10117
  Alloc PE / Size       10117 / 39.52 GiB
  Free  PE / Size       0 / 0   
  VG UUID               EvwUbc-nfsg-dHqA-znxB-U3gv-V782-Q8ZxkI

将sda3加入到eve-ng-vg这个VG中

root@eve-ng:~# vgextend eve-ng-vg /dev/sda3
  Physical volume "/dev/sda3" successfully created
  Volume group "eve-ng-vg" successfully extended

再次查看：

root@eve-ng:~# vgdisplay
  --- Volume group ---
  VG Name               eve-ng-vg
  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               199.52 GiB
  PE Size               4.00 MiB
  Total PE              51077
  Alloc PE / Size       10117 / 39.52 GiB
  Free  PE / Size       40960 / 160.00 GiB
  VG UUID               EvwUbc-nfsg-dHqA-znxB-U3gv-V782-Q8ZxkI

4、扩容Logical Volume（LV）

首先查看LV的路径和大小

root@eve-ng:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/eve-ng-vg/root
  LV Name                root
  VG Name                eve-ng-vg
  LV UUID                ktUpR0-VpqS-rJJv-a1FC-u6Gd-U8yN-2WYQ53
  LV Write Access        read/write
  LV Creation host, time eve-ng, 2018-03-21 02:25:21 +0200
  LV Status              available
  # open                 1
  LV Size                38.56 GiB
  Current LE             9872
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
   
  --- Logical volume ---
  LV Path                /dev/eve-ng-vg/swap_1
  LV Name                swap_1
  VG Name                eve-ng-vg
  LV UUID                oFbeHd-xHkl-cpe1-22Nx-xX73-xLJF-fJKrXK
  LV Write Access        read/write
  LV Creation host, time eve-ng, 2018-03-21 02:25:21 +0200
  LV Status              available
  # open                 2
  LV Size                980.00 MiB
  Current LE             245
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

将剩下的容量扩容到/dev/eve-ng-vg/root路径下：

root@eve-ng:~# lvextend -l +100%FREE /dev/eve-ng-vg/root
  Size of logical volume eve-ng-vg/root changed from 38.56 GiB (9872 extents) to 198.56 GiB (50832 extents).
  Logical volume root successfully resized.

再次查看：

root@eve-ng:~# lvdisplay
  --- Logical volume ---
  LV Path                /dev/eve-ng-vg/root
  LV Name                root
  VG Name                eve-ng-vg
  LV UUID                ktUpR0-VpqS-rJJv-a1FC-u6Gd-U8yN-2WYQ53
  LV Write Access        read/write
  LV Creation host, time eve-ng, 2018-03-21 02:25:21 +0200
  LV Status              available
  # open                 1
  LV Size                198.56 GiB
  Current LE             50832
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
   
  --- Logical volume ---
  LV Path                /dev/eve-ng-vg/swap_1
  LV Name                swap_1
  VG Name                eve-ng-vg
  LV UUID                oFbeHd-xHkl-cpe1-22Nx-xX73-xLJF-fJKrXK
  LV Write Access        read/write
  LV Creation host, time eve-ng, 2018-03-21 02:25:21 +0200
  LV Status              available
  # open                 2
  LV Size                980.00 MiB
  Current LE             245
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

重新计算文件系统大小

root@eve-ng:~# resize2fs /dev/eve-ng-vg/root
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/eve-ng-vg/root is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 13
The filesystem on /dev/eve-ng-vg/root is now 52051968 (4k) blocks long.

5、查看磁盘使用情况

root@eve-ng:~# df -h
Filesystem                    Size  Used Avail Use% Mounted on
udev                          7.9G     0  7.9G   0% /dev
tmpfs                         1.6G   18M  1.6G   2% /run
/dev/mapper/eve--ng--vg-root  196G  8.1G  179G   5% /
tmpfs                         7.9G     0  7.9G   0% /dev/shm
tmpfs                         5.0M     0  5.0M   0% /run/lock
tmpfs                         7.9G     0  7.9G   0% /sys/fs/cgroup
/dev/sda1                     472M   83M  365M  19% /boot

扩容完成！