More Notes on Windows Images

| categories: windows, openstack

This is a follow-up to Windows Images for OpenStack that includes some of the notes accumulated along the way.

Other Docs

Building Windows VM images is a topic that has been done to death, but the working consensus of those I've talked to is that Florent Flament's post is one of the best guides through this minefield.

Metadata Server Curl Commands

Instance UUID:

curl | python -c 'import sys, json; print json.load(sys.stdin)["uuid"]'

Instance Name:

curl | python -c 'import sys, json; print json.load(sys.stdin)["name"]'

Fixed IP:


Floating IP:


Building on an OpenStack Cloud

One of the changes to the base instructions is to perform the build in an OpenStack cloud. The compute node must have nested virtualization enabled so KVM will run, otherwise Qemu would be used and we just don't have time for that.

I'm going to use Cloudenvy to manage the build VM. It is similar to Vagrant in automating the grunt work of provisioning the VM. The VM needs to have at least 4Gb RAM and 40Gb disk available in order to boot the seed Windows image. This is an n1.medium flavor on the private cloud I am using.

I am also using Ubuntu 14.04 because much of my tooling already assumes an Ubuntu build environment. There is no technical reason that Fedora 20 could not be used, appropriate adjustments would need to be made, of course.

Build VM

I am not going to spend much time here explaining Cloudenvy's configuration, but there are two things required to not have a bad time with it.

Configure your cloud credentials in ~/.cloudenvy:

    keypair_name: dev-key
    keypair_location: ~/.ssh/
            os_tenant_name: demo
            os_username: demo
            os_password: secrete
    name: imagebuilder
    image: Ubuntu 14.04
    remote_user: ubuntu
    flavor_name: n1.medium

sec_groups: [
    'tcp, 22, 22,',
    'tcp, 5900, 5919,',
    'icmp, -1, -1,'

    Makefile: '~'
    ~/.cloud9.conf: '~'


The ~/.cloud9.conf file is a simple script fragment that sets the OS_* environment variable credentials required to authenticate using the OpenStack CLI tools. It looks something like:

export OS_AUTH_URL=
export OS_TENANT_NAME=demo
export OS_USERNAME=demo
export OS_PASSWORD=secrete

Why do we need two sets of credentials? Because we haven't taught Cloudenvy to read the usual environment variables yet. I smell a pull request in my future...

Fire it up and log in:

envy up
envy ssh

At this point we can switch over to Flament's process.

Or we can use the cloudbase auto-answer template

Get the ISO:

for i in aa ab ac ad ae af ag ah; do \
    swift download windows7 en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso-$i; \
    cat en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso-$i >>en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso

sudo ./

# add keypair if not already there
os keypair create --public-key ~/.ssh/ $(hostname -s)

# Create VM
os server create \
  --image "Ubuntu 14.04" \
  --flavor n1.tiny \
  --key-name bunsen \
  --user-data cconfig.txt \
  --wait \

export IP=$(os server show dt-1 -f value -c addresses | cut -d '=' -f2)

# Go to there
ssh ubuntu@$IP

Now on to Florent's steps

  • Create a virtual disk

    qemu-img create -f qcow2 Windows-Server-2008-R2.qcow2 9G

  • Boot the install VM

kvm \
    -m 2048 \
    -drive file=Windows-Server-2008-R2.qcow2,if=virtio \
    -drive file=<VIRTIO_DRIVERS_ISO>,index=3,media=cdrom \
    -net nic,model=virtio \
    -net user \
    -nographic \
    -vnc :9 \
    -k fr \
    -usbdevice tablet

Connect via VNC to :9