EVE-NG（全称Emulated Virtual Environment - Next Generation），继Unetlab 1.0后的Unetlab的2.0新版本，改了名字，原名是Unified Networking Lab统一网络实验室。这款模拟器已经不仅可以模拟网络设备，也可以运行一切虚拟机。理论上，只要能将虚拟机的虚拟磁盘格式转换为qcow2都可以在EVE-NG上运行。

官网：http://www.eve-ng.net/

默认情况下EVE为镜像存储空间分配的数值是有限的，如果你想在EVEng里面装好各种各样的镜像，首先必须有足够大的空间，然后就是需要在EVEng底层给镜像分配空间。

今天我说一下EVE-NG硬盘如何扩容，如何让存储海量镜像。

一、查看当前磁盘使用情况

/dev/mapper/eve--ng--vg-root，这是存储镜像的空间，我们只需要把这个Size扩大即可。

二、给EVE-NG硬盘扩大容量，对于EVE-NG来说，相当于加大物理磁盘容量

把EVE-NG关机后编辑EVE-NG虚拟机

注意：无法扩展具有快照的虚拟机中的磁盘，必须删除快照。

三、EVE-NG系统层面增大VG容量

三、EVE-NG系统层面增大VG容量

1、加电开机EVE-NG，确认硬盘容量为500G

root@eve-ng:~# fdisk -l
……
……
……
Disk /dev/sda: 500 GiB, 536870912000 bytes, 1048576000 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: 0x6d98196e
Device Boot Start End Sectors Size Id Type（硬盘分区情况）
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 62912511 61911042 29.5G 5 Extended （sda2的end sector值，该数值 +1即是sda3的start sector）
/dev/sda5 1001472 62912511 61911040 29.5G 8e Linux LVM
Disk /dev/mapper/eve--ng--vg-root: 23.5 GiB, 25253904384 bytes, 49324032 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: 6 GiB, 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
root@eve-ng:~#

2、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 (999424-1048575999, default 999424): 62912512
#（sda3的start sector，该值是sda2的end sector值 +1）
Last sector, +sectors or +size{K,M,G,T,P} (62912512-1048575999, default 1048575999):
# 由于sda1与sda2中间的一些sector没有使用，所以First sector提示的default是999424
Created a new partition 3 of type 'Linux' and of size 470 GiB.
Command (m for help): p
Disk /dev/sda: 500 GiB, 536870912000 bytes, 1048576000 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: 0x6d98196e
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 62912511 61911042 29.5G 5 Extended
/dev/sda3 62912512 1048575999 985663488 470G 83 Linux
/dev/sda5 1001472 62912511 61911040 29.5G 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，使分区生效）

3、将sda3加入到VG中

查看VG的名字

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 29.52 GiB
PE Size 4.00 MiB
Total PE 7557
Alloc PE / Size 7557 / 29.52 GiB
Free PE / Size 0 / 0
VG UUID 9MuCtK-vJSR-Y2aw-iIPi-lQa3-0onn-m5uNbv

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
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 499.52 GiB
PE Size 4.00 MiB
Total PE 127877
Alloc PE / Size 7557 / 29.52 GiB
Free PE / Size 120320 / 470.00 GiB
VG UUID 9MuCtK-vJSR-Y2aw-iIPi-lQa3-0onn-m5uNbv

4、扩容LV

查看LV路径

root@eve-ng:~# lvdisplay
--- Logical volume ---
LV Path /dev/eve-ng-vg/root
LV Name root
VG Name eve-ng-vg
LV UUID 0wyDXu-602J-HQ0N-T1Ue-J5si-EFFY-vKO1tX
LV Write Access read/write
LV Creation host, time eve-ng, 2017-03-18 22:23:02 +0200
LV Status available
# open 1
LV Size 23.52 GiB
Current LE 6021
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/eve-ng-vg/swap_1
LV Name swap_1
VG Name eve-ng-vg
LV UUID umXPMX-3BGd-2TR6-Msjn-zp05-GLvx-ReOHx6
LV Write Access read/write
LV Creation host, time eve-ng, 2017-03-18 22:23:02 +0200
LV Status available
# open 2
LV Size 6.00 GiB
Current LE 1536
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1

将剩余容量扩容到/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 23.52 GiB (6021 extents) to 493.52 GiB (126341 extents).
Logical volume root successfully resized.
root@eve-ng:~# lvdisplay
--- Logical volume ---
LV Path /dev/eve-ng-vg/root
LV Name root
VG Name eve-ng-vg
LV UUID 0wyDXu-602J-HQ0N-T1Ue-J5si-EFFY-vKO1tX
LV Write Access read/write
LV Creation host, time eve-ng, 2017-03-18 22:23:02 +0200
LV Status available
# open 1
LV Size 493.52 GiB
Current LE 126341
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/eve-ng-vg/swap_1
LV Name swap_1
VG Name eve-ng-vg
LV UUID umXPMX-3BGd-2TR6-Msjn-zp05-GLvx-ReOHx6
LV Write Access read/write
LV Creation host, time eve-ng, 2017-03-18 22:23:02 +0200
LV Status available
# open 2
LV Size 6.00 GiB
Current LE 1536
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1

重新定义文件系统大小

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 = 2, new_desc_blocks = 31
The filesystem on /dev/eve-ng-vg/root is now 129373184 (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 2.9G 0 2.9G 0% /dev
tmpfs 597M 14M 584M 3% /run
/dev/mapper/eve--ng--vg-root 486G 6.1G 460G 2% /
tmpfs 3.0G 0 3.0G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.0G 0 3.0G 0% /sys/fs/cgroup
/dev/sda1 472M 105M 343M 24% /boot
root@eve-ng:~#

好啦，扩容完成！各位，随意上传镜像吧，镜像再多也不怕！