ProxmoxVE(PVE) 减小缩减虚拟机硬盘设置的空间大小
Proxmox VE WEB UI上调整虚拟机磁盘大小只能增加，不能减小。
如果想减小空间设置，需要通过命令行调整
即是调整LV的大小，命令操作如下
以下命令需在节点得Shell中执行
查看虚拟机硬盘大小
先通过 lvs 命令查看虚拟机所设置的空间大小
root@pve:~# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
data pve twi-aotz-- <10.77t 0.72 0.63
root pve -wi-ao---- 96.00g
snap_vm-100-disk-0_Init pve Vri-a-tz-k 100.00g data vm-100-disk-0 4.82
snap_vm-101-disk-0_Init pve Vri---tz-k 500.00g data vm-101-disk-0
snap_vm-102-disk-0_Docker pve Vri-a-tz-k 500.00g data vm-102-disk-0 1.99
snap_vm-102-disk-0_Init pve Vri-a-tz-k 500.00g data vm-102-disk-0 1.89
snap_vm-102-disk-0_set_timezone pve Vri---tz-k 500.00g data vm-102-disk-0
snap_vm-103-disk-0_Init pve Vri---tz-k 500.00g data
snap_vm-103-disk-0_MariaDB pve Vri---tz-k 500.00g data vm-103-disk-0
snap_vm-105-disk-0_Init pve Vri---tz-k 1.00t data vm-105-disk-0
snap_vm-106-disk-0_Docker pve Vri---tz-k 100.00g data vm-106-disk-0
snap_vm-106-disk-0_Init pve Vri-a-tz-k 100.00g data vm-106-disk-0 2.28
snap_vm-107-disk-0_Rancher pve Vri---tz-k 100.00g data vm-107-disk-0
snap_vm-108-disk-0_Init pve Vri---tz-k 10.00g data vm-108-disk-0
snap_vm-108-disk-1_Init pve Vri---tz-k 52.00m data vm-108-disk-1
snap_vm-108-disk-2_Init pve Vri---tz-k 4.00t data vm-108-disk-2
snap_vm-108-disk-3_Init pve Vri---tz-k 4.00t data vm-108-disk-3
snap_vm-108-disk-4_Init pve Vri---tz-k 4.00t data vm-108-disk-4
swap pve -wi-ao---- 8.00g
vm-100-disk-0 pve Vwi-a-tz-- 100.00g data 4.82
vm-101-disk-0 pve Vwi-a-tz-- 500.00g data 1.71
vm-102-disk-0 pve Vwi-a-tz-- 500.00g data 1.99
vm-103-disk-0 pve Vwi-aotz-- 500.00g data snap_vm-103-disk-0_Init 2.02
vm-105-disk-0 pve Vwi-aotz-- 924.00g data 0.71
vm-106-disk-0 pve Vwi-a-tz-- 100.00g data 2.69
vm-106-state-Docker pve Vwi-a-tz-- <16.49g data 9.09
vm-107-disk-0 pve Vwi-aotz-- 100.00g data 7.46
vm-107-state-Rancher pve Vwi-a-tz-- <16.49g data 33.82
vm-108-disk-0 pve Vwi-aotz-- 10.00g data 16.56
vm-108-disk-1 pve Vwi-aotz-- 52.00m data 62.74
vm-108-disk-2 pve Vwi-aotz-- 4.00t data 0.15
vm-108-disk-3 pve Vwi-aotz-- 4.00t data 0.15
vm-108-disk-4 pve Vwi-aotz-- 4.00t data 0.15
vm-108-state-Init pve Vwi-a-tz-- <16.49g data 3.89 查看硬盘路径
然后执行 lvdisplay 来查看具体路径，我这个的路径是 /dev/pve/vm-105-disk-0
root@pve:~# lvdisplay
--- Logical volume ---
LV Path /dev/pve/vm-105-disk-0
LV Name vm-105-disk-0
VG Name pve
LV UUID NC8FS6-aT32-vKvd-Die0-LgDr-FHgS-16UVXd
LV Write Access read/write
LV Creation host, time pve, 2021-09-24 12:03:00 +0800
LV Pool name data
LV Status available
# open 1
LV Size 924.00 GiB
Mapped size 0.87%
Current LE 236544
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:24
--- Logical volume ---
LV Path /dev/pve/snap_vm-105-disk-0_Init
LV Name snap_vm-105-disk-0_Init
VG Name pve
LV UUID v5cCKU-Alrq-WnwA-L8dL-jaQp-7D5T-tUz4AA
LV Write Access read only
LV Creation host, time pve, 2021-09-24 12:07:48 +0800
LV Pool name data
LV Thin origin name vm-105-disk-0
LV Status NOT available
LV Size 1.00 TiB
Current LE 262144
Segments 1
Allocation inherit
Read ahead sectors auto缩减虚拟硬盘容量
执行下边的命令将空间大小减小100G
root@pve:~# lvreduce -L -100G /dev/pve/vm-105-disk-0
WARNING: Reducing active and open logical volume to 824.00 GiB.
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce pve/vm-105-disk-0? [y/n]: y
Size of logical volume pve/vm-105-disk-0 changed from 924.00 GiB (236544 extents) to 824.00 GiB (210944 extents).
Logical volume pve/vm-105-disk-0 successfully resized.
以前按这么操作导致vm挂了，今天脑子一热又试了一次，再次挂掉
启动报错如下：
un_buffer: 321 Script exited with status 32
lxc_init: 847 Failed to run lxc.hook.pre-start for container "101"
__lxc_start: 2008 Failed to initialize container "101"
TASK ERROR: startup for container '101' failed未能解决，幸好有备份，用备份恢复了，提醒看客请做好备份/快照！！！
@莫里 : 医生给病人开了一个药方药到病除，但是另一位病人反而越吃越严重，有没有可能是药不对症？