gistfile1.md

As an admin user

docker pull larsks/mini-httpd
docker save larsks/mini-httpd | 
  glance image-create --container-format docker \
    --disk-format raw --name larsks/mini-httpd --is-public True

As a non-admin user

nova boot --image larsks/mini-httpd --user-data /etc/bashrc httpd

Then run a shell inside the container:

docker exec -it <container_id> sh

And inside the container:

/ # apk add curl
(1/8) Installing run-parts (4.4-r0)
(2/8) Installing openssl (1.0.1k-r0)
ERROR: openssl-1.0.1k-r0: No error information
(3/8) Installing lua5.2-libs (5.2.3-r0)
(4/8) Installing lua5.2 (5.2.3-r0)
(5/8) Installing lua5.2-posix (32-r1)
(6/8) Installing ca-certificates (20141019-r0)
(7/8) Installing libssh2 (1.4.3-r0)
(8/8) Installing curl (7.39.0-r0)
Executing busybox-1.22.1-r14.trigger
Executing ca-certificates-20141019-r0.trigger
OK: 8 MiB in 26 packages
/ # 

And then:

/ # curl http://169.254.169.254/latest/

You should see:

meta-data/
user-data/

Then try:

/ # curl http://169.254.169.254/openstack/latest/

You should see:

meta_data.json
user_data
password

Then try:

/ # curl http://169.254.169.254/openstack/latest/user_data

And you should see the contents of your /etc/bashrc file.