KVM Virtualization Setup on Fedora

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# KVM Virtualization Setup on Fedora
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# Step 1: Check if virtualization is supported and enabled on the system
egrep '^flags.*(vmx|svm)' /proc/cpuinfo          # Look for virtualization CPU flags (vmx for Intel, svm for AMD)
lsmod | grep kvm                                 # Check if KVM modules are loaded
modinfo kvm | head                               # View KVM module information
lscpu | grep -i virtualization                   # Confirm virtualization support via lscpu

# Step 2: Check if KVM is built into the kernel
zgrep CONFIG_KVM /boot/config-$(uname -r)

# Step 3: Install the virtualization group and core packages
sudo dnf install -y @virtualization

# Step 4: Enable and start necessary services
sudo systemctl enable --now libvirtd

# Step 5: Install additional virtualization tools and dependencies
sudo dnf install -y qemu-kvm libvirt virt-install virt-manager virt-viewer edk2-ovmf swtpm qemu-img guestfs-tools libosinfo tuned

# Step 6: Add VirtIO driver repository for Windows VMs
sudo wget https://fedorapeople.org/groups/virt/virtio-win/virtio-win.repo -O /etc/yum.repos.d/virtio-win.repo

# Step 7: Enable the repository (edit line 14 and set enabled=1)
sudo sed -i 's/enabled=0/enabled=1/' /etc/yum.repos.d/virtio-win.repo

# Step 8: Install the VirtIO ISO package
sudo dnf install -y virtio-win

# Optional: Download latest VirtIO ISO manually from:
# https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/

# Step 9: Check the service file for virtqemud
sudo dnf provides */virtqemud.service

# Step 10: Enable Modular libvirt daemons
for drv in qemu interface network nodedev nwfilter secret storage; do
    sudo systemctl enable virt${drv}d.service
    sudo systemctl enable virt${drv}d{,-ro,-admin}.socket
done

# Step 11: Validate your host’s virtualization setup
sudo virt-host-validate qemu

# Step 12: Enable VT-d (for Intel IOMMU support)
# Edit GRUB config
sudo vim /etc/default/grub

# Add to GRUB_CMDLINE_LINUX:
# GRUB_CMDLINE_LINUX="rhgb quiet intel_iommu=on iommu=pt"

# Update GRUB configuration
sudo grub2-mkconfig -o /boot/grub2/grub.cfg

# Reboot system to apply changes
sudo reboot

# Step 13: Re-validate the virtualization setup after reboot
sudo virt-host-validate qemu

# Step 14: Optimize the host system using TuneD
sudo systemctl enable --now tuned

# Check current profile
tuned-adm active

# List available tuned profiles
tuned-adm list

# Set the profile optimized for virtualization
sudo tuned-adm profile virtual-host

# Confirm the profile change
tuned-adm active

# Step 15: Configure a network bridge (optional, for bridging VM network interfaces)

# List existing networks
sudo virsh net-list --all

# Create a bridge interface (name it as needed, e.g., bridge0)
sudo nmcli connection add type bridge con-name bridge0 ifname bridge0

# (Continue bridge setup as needed based on your specific networking requirements)