/gist:4756561
Last active Oct 22, 2019
boot a cloud image in kvm
| ## Install a necessary packages | |
| $ sudo apt-get install kvm cloud-utils genisoimage | |
| ## URL to most recent cloud image of 12.04 | |
| $ img_url="http://cloud-images.ubuntu.com/server/releases/12.04/release" | |
| $ img_url="${img_url}/ubuntu-12.04-server-cloudimg-amd64-disk1.img" | |
| ## download the image | |
| $ wget $img_url -O disk.img.dist | |
| ## Create a file with some user-data in it | |
| $ cat > my-user-data <<EOF | |
| #cloud-config | |
| password: passw0rd | |
| chpasswd: { expire: False } | |
| ssh_pwauth: True | |
| EOF | |
| ## Convert the compressed qcow file downloaded to a uncompressed qcow2 | |
| $ qemu-img convert -O qcow2 disk.img.dist disk.img.orig | |
| ## create the disk with NoCloud data on it. | |
| $ cloud-localds my-seed.img my-user-data | |
| ## Create a delta disk to keep our .orig file pristine | |
| $ qemu-img create -f qcow2 -b disk.img.orig disk.img | |
| ## Boot a kvm | |
| $ kvm -net nic -net user -hda disk.img -hdb my-seed.img -m 512 |
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