how to get internet on qemu + cloudimg?

trying to run a cloudimg in qemu, and i haven't found a way to get internet access, help? i've set up the cloudimg with

wget 'https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64-disk-kvm.img';
mkdir -p ./mnt;
sudo guestmount -a jammy-server-cloudimg-amd64-disk-kvm.img -i --rw ./mnt;
sudo chroot ./mnt /bin/passwd --delete root;
sudo umount mnt;

and i'm starting qemu with

sudo qemu-system-x86_64 \
-machine accel=kvm \
-cpu host \
-smp cores=4 \
-m size=1G \
-serial stdio \
-boot menu=on \
-drive media=disk,file=jammy-server-cloudimg-amd64-disk-kvm.img,if=virtio,cache=unsafe,format=qcow2,werror=report

and the system starts, and i can login as root, but it doesn't have internet access, ping saying

root@ubuntu:~# ping 8.8.8.8
ping: connect: Network is unreachable

i have tried granting network access a couple of ways, with

qemu-system-x86_64 -nic user,model=virtio-net-pci

and

qemu-system-x86_64 -nic tap

but it doesn't seem to make a difference, still getting ping: connect: Network is unreachable , and i'm stuck

This is mainly because the network configuration is missing in the guest OS, and not because of wrong configuration of the VM.

Based on instructions from 1 I had success with the following procedure.

Before starting the VM I stripped cloud-init from it, by running

virt-customize -a bionic-server-cloudimg-amd64.img --uninstall cloud-init

in the host.

Then started the bionic server cloudimg directly with qemu-system-x86_64, passing only this additional option for network

-nic user,hostfwd=tcp::8888-:22

Inside the VM, logged in as root, I had to configure the network with

cd /etc/netplan
nano 01-netcfg.yaml

and then adding this content to the created file

network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s2:
       dhcp4: true

saving and closing it, and then running

netplan --debug apply

After that, ifconfig reported an configured network, and the guest had connection.