On 6 Nov 2023 01:58 -0500, from noloa...@gmail.com (Jeffrey Walton): > QEMU/KVM is mostly like Virtual Box. If you know Virtual Box, then you > have most of what you need for QEMU/KVM.
I agree. Although _some_ terminology differs, and naturally things are organized somewhat differently in the UI, the concepts are very similar, since they solve very similar problems. So you may need to look around a little within the UI to find the particular setting you're looking for, but that should be about it. The three biggest differences I have run across (I used VirtualBox before): 1. Storage pools for disk images. With VirtualBox, you can put a disk image file anywhere. With KVM, they go into one of a defined set of pools, which in turn map to file system directories. Depending on what kind of setup you prefer, this can be anything from actually beneficial through a non-issue to a nuisance. 2. User versus system QEMU sessions. This isn't a problem, it's just something you'll need to keep in mind when setting up and using VMs. 3. KVM virtualized NAT networking doesn't play nice with nftables on the host with a restrictive policy. Took me a while to find a solution but I eventually came up with this, which has worked reliably for me: https://michael.kjorling.se/blog/2022/linux-kvm-host-nftables-guest-networking/ And another thing to keep in mind: 4. With SPICE, clipboard sharing is ENABLED by default between the guest and the host; and by consequence, between guests! This one really tripped me up. Fortunately it's not too hard to disable once you learn how; I put a recipe at https://michael.kjorling.se/blog/2023/disable-clipboard-sharing-clipboard-integration-with-qemu-kvm-and-spice/ but the short version of that one is that on the node domain/devices/graphics/clipboard in the VM XML definition to set the attribute copypaste="no". That will constrain that guest's OS clipboard functionality to within that guest. -- Michael Kjörling 🔗 https://michael.kjorling.se “Remember when, on the Internet, nobody cared that you were a dog?”
