Re: [CentOS] Resize a VM: any risk involved ?

Hi,

Wow... I didn't know about "growpart" :)

 I do, however, on XenServer (now XCP-NG) almost the same thing for

ages:

 - shutdown the VM

I thought we're talking about doing it online, which is quite a different thing because rereading partition layouts isn't always working as expected without a reboot.

Regards, Simon

 - increase disk size on XCenter
 - boot VM on maintenance mode (with DVD boot)
 - do fdisk /dev/xvda, remove the desired partition (in your case 3),

and recreate it with the same initial block and occupying the rest of the disk. - make what's is need to use the new space on the partition, in my case it's a LVM partition used as a PVE block. Than pvresize, vgextend, etc...

 Until now, no problems...

 Att.,

            Antonio.

Em qui., 8 de abr. de 2021 às 12:44, Nicolas Kovacs info@microlinux.fr escreveu:

...

Hi,

I'm currently fiddling with KVM, Proxmox and various VMs.

I setup a very basic VM with a manual (fdisk) partitioning scheme: one /boot partition, one swap partition, and one root partition, the latter being the last partition and thus expandable).

I'm starting with a reduced disk size (6 GB in total) and a minimal installation. The idea behind this approach is that I can clone this minimal VM and then eventually expand it to fit my needs.

Here's how I expand the available disk size.

First I increase the virtual disk in the hypervisor.

Then I fire up the VM and do the following:

# yum install cloud-utils-growpart # lsblk # growpart -v /dev/sda 3 # resize2fs /dev/sda3

Now here's my question (finally): is there any risk involved in this sort of operation? Or can it be performed on a production system without having to worry about data loss?

Cheers from the sunny South of France,

Niki

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