jarno / guest_disk_resize.md

### How to resize a guest VM disk 1. Resize the virtual disk image - On Proxmox: `qm resize <vmid> <disk id> <new size>` - e.g. `qm resize 132 scsi0 100G` will set the disk image size to 100G - On modern Linux guests (kernel >3.6) no need to reboot the guest 3. Steps inside the guest - for LVM: 1. Grow the partition: - fdisk <device> - list partitions with `p`, make note of the start sector - delete the partition to grow - create new partition, make sure to use same start sector - Use the same partition type signature - write partition table 2. Resize the physical volume: - List physical volumes with `pvs` - `pvresize <PV>`, e.g. `pvresize /dev/sda2` 3. Resize the logical volume: - List logical volumes with `lvs` - To grow and resize the filesystem: `lvresize -r -l+100%FREE /dev/xxx/yyyy`