proxmox ve (PVE) 调整虚拟机(VM)的磁盘大小

第一步

通过web ui中调整磁盘大小功能,先设置分配给虚拟机的磁盘空间,如下图

第二步

进入虚拟机系统,我这里的系统是CentOS,其他Linux系统应该类似。
查看磁盘信息,可以看到磁盘的总大小已经变化了,但是下边两个分区没有变

root@OpenWrt:/lib/firmware# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.39.3).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.


Command (m for help): p

Disk /dev/sdb: 4.25 GiB, 4563927040 bytes, 8913920 sectors
Disk model: QEMU HARDDISK   
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: 0x198b5c3b

Device     Boot  Start     End Sectors  Size Id Type
/dev/sdb1  *       512  524799  524288  256M 83 Linux
/dev/sdb2       526336 2622464 2096128    2G 83 Linux

第三步

给/dev/sdb2分区增加空间,注意里边的命令 resizepart 2 100% ,是把剩余的空间全部给到/dev/sdb2

root@OpenWrt:/lib/firmware# parted /dev/sdb
GNU Parted 3.6
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sdb: 4564MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start  End     Size    Type     File system  Flags
 1      262kB  269MB   268MB   primary  ext2         boot
 2      269MB  2416MB  2147MB  primary

(parted) resizepart 2 100%                                                
(parted) print                                                            
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sdb: 4564MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start  End     Size    Type     File system  Flags
 1      262kB  269MB   268MB   primary  ext2         boot
 2      269MB  4564MB  4295MB  primary

(parted) quit                                                             
Information: You may need to update /etc/fstab.

接下来你就可以看到/dev/sda2分区的大小已经变化,看End值

root@OpenWrt:/etc/openclash/core# fdisk -l
Disk /dev/loop0: 3.72 GiB, 3992780800 bytes, 7798400 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


Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Disk model: QEMU HARDDISK   
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdb: 4.25 GiB, 4563927040 bytes, 8913920 sectors
Disk model: QEMU HARDDISK   
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: 0x198b5c3b

Device     Boot  Start     End Sectors  Size Id Type
/dev/sdb1  *       512  524799  524288  256M 83 Linux
/dev/sdb2       525312 8913919 8388608    4G 83 Linux


Disk /dev/zram0: 487 MiB, 510656512 bytes, 124672 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
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