1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
df -h

Filesystem                         Size  Used Avail Use% Mounted on
udev                               7.7G     0  7.7G   0% /dev
tmpfs                              1.6G  1.6M  1.6G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  438G   38G  380G  10% /
tmpfs                              7.8G     0  7.8G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
tmpfs                              7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/sdb2                          976M  509M  401M  56% /boot
/dev/sdb1                          511M  7.9M  504M   2% /boot/efi
/dev/loop0                          56M   56M     0 100% /snap/core18/1944
/dev/loop1                          70M   70M     0 100% /snap/lxd/19188
/dev/loop2                          56M   56M     0 100% /snap/core18/1997
/dev/loop3                          68M   68M     0 100% /snap/lxd/20326
/dev/loop4                          33M   33M     0 100% /snap/snapd/11588
/dev/loop5                          32M   32M     0 100% /snap/snapd/10707
overlay                            438G   38G  380G  10% /var/lib/docker/overlay2/099fd9c0432112e7161a82a5db639648e4e6b154aabdcde39c7c43b0aa3ab1cc/merged
tmpfs                              1.6G     0  1.6G   0% /run/user/0
命令
1
2
3
4
5
6
7
lvextend -L 10G /dev/mapper/ubuntu--vg-ubuntu--lv      //增大或减小至19G
lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv     //增加10G
lvreduce -L -10G /dev/mapper/ubuntu--vg-ubuntu--lv     //减小10G
lvresize -l  +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv   //按百分比扩容

#生效
resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv