Proxmox

Available VM Types

• Place ISOs in /var/lib/vz/template/iso
• To upload via Proxmox web ui:

Storage View > Datacenter > melange > local > (you might have to hit refresh now!) > ISOs > Upload

VM Installation

• VM install from ISO
  • When you first boot an ubuntu iso, it will behave like an installation thumb drive.
  • Install to the only available drive of the VM (/dev/sda). Proxmox is smart enough to allow this. The install ISO ends up as a DVD drive.
  • Once VM install is completed, remove the DVD:
    • sudo umount /dev/sf0 (or whatever)
    • Proxmox > (VM) > hardware > DVD > remove
    • Proxmox > (VM) > shutdown, then start

VM remote desktop display

I'm using SPICE for a full responsive 4k UI on other thin(ner) clients.

Changing VM disk size

Increase is fairly easy:

• (VM) > Hardware > Hard Disk > Resize disk > Add number of GB to increase
• Update the ubuntu filesystem

sudo resizepart #
  End?  100%
sudo resize2fs /dev/sda#

Changing VM CPU allocation

• Navigate to (VM) > Hardware > Processors
• Adjust core count. Overallocation is a very good idea. CPU cores will be used only as threads need them. I've read that some shops successfully overallocate by a factor of 20:1. With our 12 Ryzen 9 cores, that means we would allocate 120 total cores to our VMs(!). Don't do that, ha.
• Stick with 1 socket (that's just for sizing to match any paid licensing)

Proxmox Installation

• In BIOS, enable SVM (cpu virtualization) (you need a modern AMD or Intel chipset)
• Get the latest proxmox release ISO, dd it to a thumb drive (use Flash_Drives SAM 64 EVO)
• Boot and install onto the primary drive over any existing OSes
• During install, use ext4
  • I deemed ZFS too fancy, it's basically software raid, and troublesome according to some
• Create a user and use ssh key (NOTE you might want to keep some root terminals open so you don't screw up and get locked out!):

apt install sudo
adduser m
visudo # and allow m to sudo
nano /etc/ssh/sshd_config # and turn off password login, root login
su - m
# set up ssh keys
# in another terminal, test:
ssh melange