wiki/wiki/linux/proxmox.md

Proxmox

Proxmox is an environment for virtual machines and containers.

Disk Management

Adding a LVM to Proxmox

Create a pv and vg according to the LVM page at subsection Create VG for proxmox. Then add the LVM via the web-interface. Select Datacenter and Storage. The Add and choose LVM. After that follow the instructions and fill in the fields to your liking.

Enlarging disk of a VM

Make sure there is enough disk space available. For further information see the disk management article

SSH into Proxmox. Enlarge a disk by using:

qm resize <vmid> <vm-disk-to-enlarge> <size>

For example if you want to the disk 100 by 100G (100GibiByte):

qm resize 100 ide0 +100G

Afterwards the partition of the VM needs to be enlarged. For that the disk management article can be used for non-LVM paritions. Alternatively the LVM article can be referenced for LVM systems. After that grow the filesystem in the vm as described in the disk management article.

Remove local-lvm and add its size to local

First remove local-lvm with lvremove /dev/pve/data. Then remove local-lvm in the proxmox gui via Datacenter/Storage/Remove. Change the Content of the remaining storage according to your needs. Add the free storage to the remaining storage with lvresize -rl +100%FREE /dev/pve/root. Finally extend the filesystem resize2fs /dev/mapper/pve-root.

VM passthrough

USB passthrough

On the host system find the usb you're looking to pass through with

lsusb

Then assign it to the vm using

qm set <vm-id> -usb<id-to-set> host=<id-of-the-usb>

for example

qm set 101 -usb0 host=aaaa:8816

PCI/GPU passthrough

To use GPUs or other PCI devices you need to work with PCI passthrough. For documentation you can look in the Proxmox wiki. There is also an article on reddit, that focusses especially on windows 10 VMs with GPU passthrough.

Increasing backup-limit of Proxmox storage

The default limit for backup is 1. This is a bit too low. To increase it navigate to the webinterface and click on Datacenter and Storage select the storage you want to save your backup to and change Max Backups to your liking.

Troubleshooting

No internet after mainboard swap

If you change the mainboard of your proxmox-virtual-environment it is possible, that the NIC changes. Find out the new interface name with ip a. After that get all occurences of the interface (eth0 in the example) with rgrep eth0 /etc and change them to the new device with a text editor of your choice. It is possible that there are also files existing that need to be renamed. Find them with find /etc -change '*eth0*' and move them to the new name. After that reboot and the internet should be up again. (sources: debian website and proxmox forum)