Virtualization with libvirtd on Fedora 30
I found the official Fedora docs lacking so here's how I setup libvirtd on Fedora 30.
Install and run
$ sudo dnf install @virtualization-headless opus libdrm libpciaccess
$ sudo systemctl enable --now libvirtd
Virt-manager access with ssh key
Create a user account on the server which is a member of the group libvirt. Or add your own user to this group.
$ sudo usermod -a -G libvirt virt-manager
Add your ssh key to this user account.
Now you can run virt-manager from your laptop and connect to the libvirt server, click Add new connection.
Select Custom URI in the dropdown.
Enter the URI, the whole URI should look something like qemu+ssh://virt-manager@nas02/system so don't forget the system part at the end which isn't visible in the screenshot.
Now you can connect to one or more KVM/libvirtd hypervisors from the comfort of your own laptop and the virt-manager GUI.
Setting up an ISO data store
For simplicity I put my ISO files on a NFS share, but that's of course much slower than having them local.
I already have an NFS share setup with autofs and mounted under /media/nas/Downloads, so my ISO path would be /media/nas/Downloads/Misc/ISO.
This is real simple to do in the virt-manager GUI if you double click a hypervisor connection and look at the Storage tab.
Setting up a custom vm image store over NFS
One of my hypervisors has a lot of BTRFS storage space so I'm sharing a BTRFS volume over NFS to my other hypervisor.
This requires sudo setsebool -P virt_use_nfs=on for SElinux to allow it.
Then you can just mount it under /var/lib/libvirt/images/nas02 for example, because my BTRFS server is called nas02.
Here's my fstab entry.
nas02:/var/btrfs/vmimages /var/lib/libvirt/images/nas02 nfs defaults 0 0
After that you add it in the virt-manager storage GUI.