Resize VM images in proxmox

When you really need to resize a VM disk image ( and free space to be allocated into partitions inside the vm) you might want to read this:

Step-by-step guide

1. Poweroff you VM from proxmox
2. Grow the disk allocation from proxmox GUI
3. Open a shell to proxmox and use parted to resize the partitions ( for qcow you might need to mount it first on nbd )

   root@proxmox:~# qemu-nbd -c /dev/nbd0 /mnt/pve/gogu/images/108/vm-108-disk-1.qcow2 root@proxmox:~# parted /dev/nbd0 (parted) p Model: Unknown (unknown) Disk /dev/nbd0: 82.9GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number  Start   End     Size    Type     File system  Flags  1      1049kB  525MB   524MB   primary  ext4         boot  2      525MB   42.9GB  42.4GB  primary               lvm (parted) resizepart 2 82.8G root@proxmox:~# nbd-client -d /dev/nbd0

4. Power on the VM and login to it. Time to put the free space to good use.

   pvdisplay pvresize /dev/vda2 lvextend -l +100%FREE /dev/mapper/vg_webtest01-lv_root resize2fs /dev/mapper/vg_webtest01-lv_root # In case of xfs use: # xfs_growfs /dev/mapper/centos_template-root

5. Job done . Enjoy