ubuntu扩容非LVM根分区

Ubuntu系统安装growpart相关工具：

sudo apt install cloud-guest-utils
sudo apt install xfsprogs

我的分区如下：

(base) root@uni-dzkf-gpu:/bin# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs   32G     0   32G   0% /dev
tmpfs          tmpfs     6.3G  1.4M  6.3G   1% /run
/dev/vda2      ext4       99G   93G  1.3G  99% /

(base) root@uni-dzkf-gpu:/bin# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1  386K  0 rom  /media/root/config-2
vda    252:0    0  200G  0 disk
├─vda1 252:1    0    1M  0 part
└─vda2 252:2    0  100G  0 part /

说明：

我将vda磁盘从100G扩容至200G，现在需要做的是扩展vda2分区

执行下面的命令：

(base) root@uni-dzkf-gpu:/bin# growpart /dev/vda 2
CHANGED: partition=2 start=4096 old: size=209711071 end=209715167 new: size=419426271 end=419430367
(base) root@uni-dzkf-gpu:/bin#

注意：

/dev/vda 2 之间是有空格的，不是vda2

这里的2就是指的，对/dev/vda这个磁盘的第2个分区进行growpart操作。
如果你有多个分区，要特别注意这里不要弄错。

如果出现报错：

unexpected output in sfdisk --version [sfdisk，来自 util-linux 2.23.2]

则执行下面的命令修改字符编码：

LANG=en_US.UTF-8
或者
export LC_ALL=en_US.UTF-8
localectl set-locale LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8

然后再执行resize2fs：

(base) root@uni-dzkf-gpu:/bin# resize2fs /dev/vda2
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/vda2 is mounted on /; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 25
The filesystem on /dev/vda2 is now 52428283 (4k) blocks long.

(base) root@uni-dzkf-gpu:/bin# 

全过程如下：

(base) root@uni-dzkf-gpu:/bin# ll growpart
-rwxr-xr-x 1 root root 24522 Feb 26  2020 growpart*
(base) root@uni-dzkf-gpu:/bin# pwd
/bin
(base) root@uni-dzkf-gpu:/bin# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1  386K  0 rom  /media/root/config-2
vda    252:0    0  200G  0 disk
├─vda1 252:1    0    1M  0 part
└─vda2 252:2    0  100G  0 part /
(base) root@uni-dzkf-gpu:/bin#
(base) root@uni-dzkf-gpu:/bin# growpart /dev/vda 2
CHANGED: partition=2 start=4096 old: size=209711071 end=209715167 new: size=419426271 end=419430367
(base) root@uni-dzkf-gpu:/bin#
(base) root@uni-dzkf-gpu:/bin# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sr0     11:0    1  386K  0 rom  /media/root/config-2
vda    252:0    0  200G  0 disk
├─vda1 252:1    0    1M  0 part
└─vda2 252:2    0  200G  0 part /
(base) root@uni-dzkf-gpu:/bin# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs   32G     0   32G   0% /dev
tmpfs          tmpfs     6.3G  1.4M  6.3G   1% /run
/dev/vda2      ext4       99G   93G  1.3G  99% /
tmpfs          tmpfs      32G  8.0K   32G   1% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs      32G     0   32G   0% /sys/fs/cgroup
tmpfs          tmpfs     6.3G   52K  6.3G   1% /run/user/0
/dev/sr0       iso9660   386K  386K     0 100% /media/root/config-2
(base) root@uni-dzkf-gpu:/bin# resize2fs /dev/vda2
resize2fs 1.45.5 (07-Jan-2020)
Filesystem at /dev/vda2 is mounted on /; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 25
The filesystem on /dev/vda2 is now 52428283 (4k) blocks long.

(base) root@uni-dzkf-gpu:/bin# df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs   32G     0   32G   0% /dev
tmpfs          tmpfs     6.3G  1.4M  6.3G   1% /run
/dev/vda2      ext4      197G   93G   96G  50% /
tmpfs          tmpfs      32G  8.0K   32G   1% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs      32G     0   32G   0% /sys/fs/cgroup
tmpfs          tmpfs     6.3G   52K  6.3G   1% /run/user/0
/dev/sr0       iso9660   386K  386K     0 100% /media/root/config-2
(base) root@uni-dzkf-gpu:/bin#