Linux 阿里云挂载新的硬盘 和 阿里云扩展根分区_阿里云 挂载 扩容根结点

1. 查看设备挂载的情况

[root@192 ~]# 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  100G  0 disk 

2.分区

[root@192 ~]# fdisk /dev/vd
vda   vda1  vdb   
[root@192 ~]# fdisk /dev/vdb 
Welcome to fdisk (util-linux 2.23.2).
 
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
 
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x538b9e95.
 
Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 
First sector (2048-209715199, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): 
Using default value 209715199
Partition 1 of type Linux and of size 100 GiB is set
 
Command (m for help): w
The partition table has been altered!

3. 格式化硬盘

 mkfs.ext4 /dev/vdb1

4. 创建挂载点，例如

mkdir /database

5. 挂载硬盘

 mount /dev/vdb1 /database

6. 查看结果

df -h

7. 设置系统自动挂载硬盘

vi /etc/fstab
/dev/vdb1 /database ext4 defaults 0 0

 

 

扩展根分区

https://help.aliyun.com/document_detail/111738.html?spm=a2c4g.11186623.6.801.4faf7f67tzAtVh阿里链接

1，买好磁盘后可以看到vda 还有100G 的空间

[root@192 ~]# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
vda    253:0    0  150G  0 disk 
└─vda1 253:1    0   40G  0 part /
vdb    253:16   0  100G  0 disk 
└─vdb1 253:17   0  100G  0 part /database
[root@192 ~]# growpart /dev/vda 1
CHANGED: partition=1 start=2048 old: size=83873317 end=83875365 new: size=314566717,end=314568765

2，看到磁盘块满了，下面开始扩容

[root@192 ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   36G  1.5G  97% /
devtmpfs        3.9G     0  3.9G   0% /dev
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           3.9G 1000K  3.9G   1% /run
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/vdb1        99G  360M   93G   1% /database
overlay          40G   36G  1.5G  97% 

3.命令调用growpart为需要扩容的云盘和对应的第几个分区扩容

[root@192 ~]# growpart /dev/vda 1
CHANGED: partition=1 start=2048 old: size=83873317 end=83875365 new: size=314566717,end=314568765

4.运行resize2fs <PartitionName>命令调用resize2fs扩容文件系统。

[root@192 ~]# resize2fs /dev/vda1
resize2fs 1.42.9 (28-Dec-2013)
Filesystem at /dev/vda1 is mounted on /; on-line resizing required
old_desc_blocks = 3, new_desc_blocks = 10
The filesystem on /dev/vda1 is now 39320839 blocks long.

5.运行df -h命令查看云盘分区大小

[root@192 ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1       148G   37G  105G  27% /
devtmpfs        3.9G     0  3.9G   0% /dev
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           3.9G 1000K  3.9G   1% /run
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/vdb1        99G  360M   93G   1% /database
overlay         148G   37G  105G  27%