What does the images contain:
----------------------------

It's a two node OpenStack RDO set-up configured manually on two
Fedora 20 VMs:

  - Controller node: Nova, Keystone, Cinder, Glance, Neutron (using Open
    vSwitch plugin and GRE tunneling).

  - Compute node: Nova (nova-compute), Neutron (openvswitch-agent)

  - Here are the Neutron configs & iptables rules --
http://kashyapc.fedorapeople.org/virt/openstack/neutron-configs-GRE-OVS-two-node.txt


Assumptions:

  - A non-default libvirt network called 'openstackvms' in the
    192.169.142.2/24 subnet exists. If you don't have one, you could
    trivially create it from here:
    http://kashyapc.fedorapeople.org/virt/create-a-new-libvirt-bridge.txt

  - The libvirt XML assumes the iamges are located in
    /export/ostack-images (you can, of course, edit the location -- $
    virsh edit foo.qcow2 to suit your needs

  - You have nested virtualization enabled on the host & the VM is
    started with it enabled:

       $ modinfo kvm_intel | grep -i nested
       $ echo "options kvm-intel nested=y" | sudo tee \
        /etc/modprobe.d/kvm-intel.conf
       $ init 6

       # Edit your Compute node's XML:
       $ virsh edit ostack-compute
       [. . .]
       <cpu mode='host-passthrough'/>

       # Start it & ensure /dev/kvm file is now present
       $ virsh start ostack-compute --console
       $ file /dev/kvm


Once inside the controller node:

        # Restart qpidd
        $ systemctl restart qpidd

        # Run nova-manage (you should see all smiles)
        $ nova-manage list

        # Start a guest
        $ nova start cirros-12net-guest1
        $ watch nova list
        $ nova console-log cirros-12net-guest1


To use the images:

  # 1. Fetch
  $ wget -c \
  http://kashyapc.fedorapeople.org/virt/openstack/rdo/ostack-controller-sparse.qcow2.xz
  \
  http://kashyapc.fedorapeople.org/virt/openstack/rdo/ostack-compute-sparse.qcow2.xz

  # 2. Decompress:
  $ xz -v --decompress ostack-controller-sparse.qcow2.xz
  $ xz -v --decompress ostack-compute-sparse.qcow2.xz

  # FIXME 3. Define the XMLs and start the guests



Sizes of xz compressed images:

  $ ls -lash ostack-controller-sparse.qcow2.xz ostack-compute-sparse.qcow2.xz
  611M -rw-r--r--. 1 root    root    611M Dec 15 14:35 ostack-compute-sparse.qcow2.xz
  657M -rw-r--r--. 1 kashyap kashyap 657M Dec 15 00:47 ostack-controller-sparse.qcow2.xz


De-compressed ($ xz -v --decompress foo)

  $ ls -lash ostack-controller-sparse.qcow2 ostack-compute-sparse.qcow2
  4.5G -rw-r--r--. 1 root root 4.5G Dec 15 00:47 ostack-controller-sparse.qcow2
  4.3G -rw-r--r--. 1 root root 4.3G Dec 15 14:35 ostack-compute-sparse.qcow2


What I did:
-----------

Original size of the images:

  $ ls -lash ostack-controller.qcow2 ostack-compute.qcow2
  11G -rw-r--r--. 1 qemu    qemu    15G Dec 13 11:12 ostack-compute.qcow2
  25G -rw-r--r--. 1 kashyap kashyap 25G Dec 13 11:12 ostack-controller.qcow2

So I ran virt-sparsify:

  $ virt-sparsify ostack-controller.qcow2 ostack-controller-sparse.qcow2
  $ virt-sparsify ostack-compute.qcow2 ostack-compute-sparse.qcow2

Followed by xz compression:

  $ xz -v --best ostack-controller-sparse.qcow2
  $ xz -v --best ostack-compute-sparse.qcow2

As you could see the resultant xz images combined are: 1.2 GB (1268 MB)


If someone wants to resize/expand VM images, they could trivially --
http://kashyapc.wordpress.com/2013/04/13/resize-a-fedora-19-guest-with-libguestfs-tools/