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ubuntu cloud image creation
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How to create a simple cloud image | |
sudo apt-get install cloud-utils | |
wget https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-amd64-disk1.img | |
mv xenial-server-cloudimg-amd64-disk1.img xenial-server-cloudimg-amd64-disk1.img.dist | |
qemu-img convert -O qcow2 xenial-server-cloudimg-amd64-disk1.img.dist xenial-server-cloudimg-amd64-disk1.img | |
qemu-img resize xenial-server-cloudimg-amd64-disk1.img +40G | |
user-data | |
#cloud-config | |
users: | |
- name: demo | |
ssh-authorized-keys: | |
- ssh-rsa xxx | |
- ssh-rsa yyy | |
sudo: ['ALL=(ALL) NOPASSWD:ALL'] | |
groups: sudo | |
shell: /bin/bash | |
runcmd: | |
- sed -i -e '$aAllowUsers demo' /etc/ssh/sshd_config | |
- restart ssh | |
cloud-localds user-data.img user-data | |
#Create your own macvtap device with a random mac | |
sudo ip link del "$MACVTAP" | |
sudo ip link add link "$PDEV" name "$MACVTAP" type macvtap mode bridge | |
sudo ip link set "$MACVTAP" address 02:00:DE:AD:02:01 up | |
sudo ip link show "$MACVTAP" | |
if [ ! -f "$IMAGE" ]; then | |
>&2 echo "Can't find image file \"$IMAGE\"" | |
exit 1 | |
fi | |
rm -f debug.log | |
tapindex=$(< /sys/class/net/"$MACVTAP"/ifindex) | |
tapdev=/dev/tap"$tapindex" | |
ifconfig "$MACVTAP" up | |
qemu-system-x86_64 \ | |
-enable-kvm \ | |
-smp cpus=4,cores=2 -cpu host \ | |
-vga none -nographic \ | |
-drive file="$IMAGE",if=virtio,aio=threads \ | |
-net nic,model=virtio,macaddr=$(< /sys/class/net/"$MACVTAP"/address) -net tap,fd=3 3<>"$tapdev" \ | |
-drive file=user-data.img,if=virtio,media=cdrom \ | |
-debugcon file:debug.log -global isa-debugcon.iobase=0x402 |
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