环境准备

系统环境：EVE-PRO-VM-2.0.4-20

前期是使用ova导入安装，精简置备，40G虚拟磁盘容量。空间不足，尝试了很久，记录操作记录如下：血泪教训：操作不当有可能引起数据丢失，需要提前备份数据！备份镜像！！备份lab！！！

1. 关机状态下编辑EVE虚拟机

将虚拟磁盘容量从40G扩展至200G，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：无法扩展具有快照的虚机中的磁盘，必须删除快照！

2. EVE系统层面对磁盘重新分区''' 操作之前 '''

root@eve-ng:~# df -h

Filesystem Size Used Avail Use% Mounted on

udev 3.9G 0 3.9G 0% /dev

tmpfs 799M 27M 773M 4% /run

/dev/mapper/eve--ng--vg-root 38G 17G 20G 46% / >>> 记住这个卷名称

tmpfs 3.9G 0 3.9G 0% /dev/shm

tmpfs 5.0M 0 5.0M 0% /run/lock

tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup

/dev/sda1 472M 83M 365M 19% /boot

root@eve-ng:~#

root@eve-ng:~#建议备份 /etc/fstab ，之前遇到虚拟机重启后 eve--ng--vg-root 这个逻辑卷从 fstab 中消失。''' 查看磁盘分区情况 '''

root@eve-ng:~# fdisk -l

......

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/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

root@eve-ng:~#

开始磁盘分区操作：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 >>> 创建新分区

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First sector = sda2的end sector + 1

Last sector, +sectors or +size{K,M,G,T,P} (83884032-419430399, default 419430399):

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

''' 修改分区类型(与sda5保持一致，可选) '''

Command (m for help): t

Partition number (1-3,5, default 5): 3

Partition type (type L to list all types): 8e

Changed type of partition 'Linux' to 'Linux LVM'.

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 8e Linux LVM

/dev/sda5 1001472 83884031 82882560 39.5G 8e Linux LVM

Partition table entries are not in disk order.

Command (m for help): w >>> 写入磁盘分区表

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:~#

此时可以进行选择，使用 fdisk 工具只是将分区信息写到磁盘，如果需要 mkfs 磁盘分区则需要重启系统，

而使用 partprobe 则可以使 kernel 重新读取分区信息，从而避免重启系统。root@eve-ng:~# partprobe

3. 初始化物理卷(可选)root@eve-ng:~# pvscan

PV /dev/sda5 VG eve-ng-vg lvm2 [39.52 GiB / 0 free]

Total: 1 [39.52 GiB] / in use: 1 [39.52 GiB] / in no VG: 0 [0 ]

root@eve-ng:~#

root@eve-ng:~# pvcreate /dev/sda3

Physical volume "/dev/sda3" successfully created

root@eve-ng:~#

root@eve-ng:~# pvscan

PV /dev/sda5 VG eve-ng-vg lvm2 [39.52 GiB / 0 free]

PV /dev/sda3 lvm2 [160.00 GiB]

Total: 2 [199.52 GiB] / in use: 1 [39.52 GiB] / in no VG: 1 [160.00 GiB]

root@eve-ng:~#pvcreate命令 用于将物理硬盘分区初始化为物理卷，以便LVM使用。

4. 扩展逻辑卷空间''' 操作之前查看当前卷组属性 '''

root@eve-ng:~# vgdisplay

--- Volume group ---

VG Name eve-ng-vg >>> 记录卷组名称

......

VG Size 39.52 GiB

......

VG UUID EvwUbc-nfsg-dHqA-znxB-U3gv-V782-Q8ZxkI

root@eve-ng:~#

''' 向卷组中添加物理卷 '''

root@eve-ng:~# vgextend eve-ng-vg /dev/sda3

Volume group "eve-ng-vg" successfully extended

root@eve-ng:~#

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

root@eve-ng:~#

此时查看 pvscan ，不在 VG 中的物理卷空间为 0：root@eve-ng:~# pvscan

PV /dev/sda5 VG eve-ng-vg lvm2 [39.52 GiB / 0 free]

PV /dev/sda3 VG eve-ng-vg lvm2 [160.00 GiB / 160.00 GiB free]

Total: 2 [199.52 GiB] / in use: 2 [199.52 GiB] / in no VG: 0 [0 ]

root@eve-ng:~#

接下来扩展逻辑卷空间：''' 操作之前检查当前逻辑卷属性 '''

root@eve-ng:~# lvdisplay

--- Logical volume ---

LV Path /dev/eve-ng-vg/root >>> 记录LV Path

......

LV Size 38.56 GiB

......

--- Logical volume ---

LV Path /dev/eve-ng-vg/swap_1

......

root@eve-ng:~#

root@eve-ng:~#

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.

root@eve-ng:~#

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

root@eve-ng:~#

最后执行 resize2fs 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.

root@eve-ng:~#

root@eve-ng:~# df -h

Filesystem Size Used Avail Use% Mounted on

udev 3.9G 0 3.9G 0% /dev

tmpfs 799M 27M 773M 4% /run

/dev/mapper/eve--ng--vg-root 196G 17G 171G 9% /

tmpfs 3.9G 0 3.9G 0% /dev/shm

tmpfs 5.0M 0 5.0M 0% /run/lock

tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup

/dev/sda1 472M 83M 365M 19% /boot

root@eve-ng:~#

2020年3月，删除之前博客内容，整理扩展LVM卷的内容，eve-ng操作技巧后面单独整理一篇

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最后编辑时间为: Mar 26, 2020 at 11:06 am