华为云扩容云硬盘

示例说明：

数据盘 /dev/vdb 原有容量100GiB，只有一个分区 /dev/vdb1。将数据盘容量扩大至150GiB，将新增的50GB增加至已有分区 /dev/vdb1。

1. 检查当前系统是否已安装growpart扩容工具。

growpart

如果回显为工具使用介绍，则表示已安装，无需重复安装。

[root@ecs-centos76 ~]# growpart
growpart disk partition
  rewrite partition table so that partition takes up all the space it can
  options:
  -h | --help           print Usage and exit
       --fudge F        if part could be resized, but change would be
                        less than 'F' bytes, do not resize (def ault: 1048576)
  -N | --dry-run        only report what would be done, show new 'sfdisk -d'
  -v | --verbose    increase verbosity / debug
  -u | --update R   update the the kernel partition table info after growing
                        this requires kernel support and 'partx --update'
                        R is one of:
                        - 'auto': [default] update partition if possible
                        - 'force' : try despite- sanity checks (fail on failure)
                        - 'off' : do not attempt
                        - 'on'  : fail if sanity checks indicate no support
  Example:
  - growpart /dev/sda 1
    Resize partition 1 on /dev/sda
must supply disk and part it ion-number
[root@ecs-centos76 ~l#

如果没有以上回显信息，请执行以下安装命令。

apt install cloud-utils-growpart

Loaded plugins: fastestmirror
Determining fastest mirrors
epel/x86_64/metalink                                                                                             
| 8.0 kB  00:00:00
...
Package cloud-utils-growpart-0.29-2.el7.noarch already installed and latest version
Nothing to do

表示安装成功。

2. 查看数据盘“/dev/vdb”的分区信息。

lsblk

[root@ecs-centos76 ~]# lsblk
NAME   MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda    253:0    0  40G  0 disk
├vda1 253:1    0  40G  0 part /
vdb    253:16   0  150G 0 disk
├vdb1 253:17   0  100G 0 part /mnt/sdc

表示数据盘“/dev/vdb”有150GiB的容量，分区“/dev/vdb1”已有100GiB，扩容的50GiB容量还未划分磁盘分区。

如果磁盘未分区，需要直接扩容文件系统，请执行4。

3. 将扩容新增的容量增加至分区“/dev/vdb1”。

growpart /dev/vdb 1

[root@ecs-test-0001 ~]# growpart /dev/vdb 1
CHANGED: partition=1 start=2048 old: size=209713152 end=209715200 new: size=314570719,end=314572767

4. 扩容分区“/dev/vdb1”文件系统大小。

查看数据盘 /dev/vdb 对应分区 /dev/vdb1 的文件系统类型。
parted /dev/vdb

[root@ecs-centos74 ~]# parted /dev/vdb
GNU Parted 3.1
Using /dev/vdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: Virtio Block Device (virtblk)
Disk /dev/vdb: 107GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:

Number  Start   End    Size     File system    Name       Flags
1      1049KB  107GB  107GB    ext4           /dev/vdb1

(parted)

查看完成后，输入“q”，按“Enter”，退出parted模式。

根据回显可知分区 /dev/vdb1 的文件系统类型为ext4，执行以下命令进行扩容。
resize2fs /dev/vdb1

[root@ecs-test-0001 ~]# resize2fs /dev/vdb1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vdb1 is mounted on /mnt/sdc; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 19
The filesystem on /dev/vdb1 is now 39321339 blocks long.

5. 查看扩容后分区的容量。