root@ubuntu:~# df -lh
Filesystem Size Used Avail Use% Mounted on
udev 7.9G 0 7.9G 0% /dev
tmpfs 1.6G 8.8M 1.6G 1% /run
/dev/mapper/ubuntu--vg-root 80G 79G 1G 99% /
tmpfs 7.9G 0 7.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/sda1 472M 313M 135M 70% /boot
tmpfs 100K 0 100K 0% /run/lxcfs/controllers
overlay 555G 79G 453G 15% /var/lib/docker/overlay2/9a04529da03da1c8cc2cdff91938fdb5eee74cace8ee05598de90db02fc043da/merged
root@ubuntu:~# ls
root@ubuntu:~#
root@ubuntu:~#
root@ubuntu:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 99.5G 0 part
|-ubuntu--vg-root 252:0 0 563.5G 0 lvm /
`-ubuntu--vg-swap_1 252:1 0 16G 0 lvm
`-cryptswap1 252:2 0 16G 0 crypt [SWAP]
sdb 8:16 0 500G 0 disk
sr0 11:0 1 655M 0 rom
接下来对sdb进行分区
查看具体的需要扩容的路径为/dev/mapper/ubuntu--vg-root
root@ubuntu:~# fdisk -l
Disk /dev/sdb: 500 GiB, 536870912000 bytes, 1048576000 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: 0x4970329d
Device Boot Start End Sectors Size Id Type
/dev/sdb3 2048 1048575999 1048573952 500G 83 Linux
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: 0x8fb316e8
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 209713151 208711682 99.5G 5 Extended
/dev/sda5 1001472 209713151 208711680 99.5G 8e Linux LVM
Disk /dev/mapper/ubuntu--vg-root: 80 GiB, 605074489344 bytes, 1181786112 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
然后fdisk，注意分区格式化的是/dev/sdb,搞错了就自己找个地方躲起来
fdisk /dev/sdb
按n
按p
按1-1
按w保存
分区好了再lsblk看看
root@ubuntu:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
|-sda1 8:1 0 487M 0 part /boot
|-sda2 8:2 0 1K 0 part
`-sda5 8:5 0 99.5G 0 part
|-ubuntu--vg-root 252:0 0 80G 0 lvm /
`-ubuntu--vg-swap_1 252:1 0 16G 0 lvm
`-cryptswap1 252:2 0 16G 0 crypt [SWAP]
sdb 8:16 0 500G 0 disk
`-sdb3 8:19 0 500G 0 part
sr0 11:0 1 655M 0 rom
现在分区有了
但是要做成lvm才可以
root@ubuntu:~# vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- 99.52g 0
ubuntu-vg这个好像是分区组的意思
然后把/dev/sdb3划分到这个分区组里面
root@ubuntu:~# vgextend ubuntu-vg /dev/sdb3
Physical volume "/dev/sdb3" successfully created
Volume group "ubuntu-vg" successfully extended
root@ubuntu:~# vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 2 2 0 wz--n- 599.52g 500.00g
然后扩容
root@ubuntu:~# lvextend /dev/mapper/ubuntu--vg-root -L +480G
Size of logical volume ubuntu-vg/root changed from 83.52 GiB (21381 extents) to 563.52 GiB (144261 extents).
Logical volume root successfully resized.
最后更新
root@ubuntu:~# resize2fs /dev/mapper/ubuntu--vg-root
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/mapper/ubuntu--vg-root is mounted on /; on-line resizing required
old_desc_blocks = 6, new_desc_blocks = 36
The filesystem on /dev/mapper/ubuntu--vg-root is now 147723264 (4k) blocks long.
