fast-vm-net-cleanup

#!/bin/sh
FASTVM_HELPER=/usr/libexec/fast-vm-helper.sh
if [ ! -f '/etc/fast-vm.conf' ]; then
        echo "[err] global configuration file /etc/fast-vm.conf not found"
        exit 1
fi
# load global configuration file
. /etc/fast-vm.conf

echo "[inf] fixing fast-vm network $LIBVIRT_NETWORK"
virsh --connect qemu:///system net-dumpxml "$LIBVIRT_NETWORK"|grep 'host mac'|awk '{print $2,$3}' | while read -r mac ip; do
	mac=$(echo "$mac"|cut -d\' -f2)
	ip=$(echo "$ip"|cut -d\' -f2)
	vm_number=$(echo "$ip"|cut -d. -f4)
	vm_name=$(virsh --connect qemu:///system list --all|awk '{print $2}'|grep -E "^${VM_PREFIX}.*-$vm_number"|head -1)

	if [ -z "$vm_name" ] && [ "$vm_number" -gt 2 ]; then
		echo "[inf] deleting reservation for non-existing VM number $vm_number"
		echo "dhcp_release" "$LIBVIRT_NETWORK" "$vm_number" "$mac" | sudo -n $FASTVM_HELPER
                virsh --connect qemu:///system net-update "$LIBVIRT_NETWORK" delete ip-dhcp-host --xml "<host mac='$mac' ip='$ip'/>" --live --config

	fi

done

echo "[inf] check for dummy DHCP reservation"
if [ "$(virsh --connect qemu:///system net-dumpxml "$LIBVIRT_NETWORK"|grep -c '52:54:00:99:ff:99')" -eq 0 ]; then
	echo "[inf] adding missing dummy DHCP reservation"
	virsh --connect qemu:///system net-update "$LIBVIRT_NETWORK" add-last ip-dhcp-host --xml "<host mac='52:54:00:99:ff:99' ip='192.168.${SUBNET_NUMBER}.2'/>" --live --config
fi

# TODO
# - regenerate missing DHCP reservations for existing fastvm VMs
# - delete wrong DHCP leases where existing VM MAC is having non-assigned address