setup coreos image on openstack step

coreos-openstack

# https://coreos.com/docs/running-coreos/platforms/openstack/

Step one:

```
$ wget http://alpha.release.core-os.net/amd64-usr/current/coreos_production_openstack_image.img.bz2
$ bunzip2 coreos_production_openstack_image.img.bz2
$ glance image-create --name CoreOS \
  --container-format bare \
  --disk-format qcow2 \
  --file coreos_production_openstack_image.img \
  --is-public True
+------------------+--------------------------------------+
| Property         | Value                                |
+------------------+--------------------------------------+
| checksum         | 4742f3c30bd2dcbaf3990ac338bd8e8c     |
| container_format | ovf                                  |
| created_at       | 2013-08-29T22:21:22                  |
| deleted          | False                                |
| deleted_at       | None                                 |
| disk_format      | qcow2                                |
| id               | cdf3874c-c27f-4816-bc8c-046b240e0edd |
| is_public        | True                                 |
| min_disk         | 0                                    |
| min_ram          | 0                                    |
| name             | coreos                               |
| owner            | 8e662c811b184482adaa34c89a9c33ae     |
| protected        | False                                |
| size             | 363660800                            |
| status           | active                               |
| updated_at       | 2013-08-29T22:22:04                  |
+------------------+--------------------------------------+
```

Step two:
```
#cloud-config

coreos:
  etcd:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new
    discovery: https://discovery.etcd.io/<token>
    # multi-region and multi-cloud deployments need to use $public_ipv4
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
ssh_authorized_keys:
  # include one or more SSH public keys
  - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC0g+ZTxC7weoIJLUafOgrm+h...
```

setup 3:
```
nova boot \
--user-data ./cloud-config.yaml \
--image cdf3874c-c27f-4816-bc8c-046b240e0edd \
--key-name coreos \
--flavor m1.medium \
--num-instances 3 \
--security-groups default coreos
```

setup 4:
$ chmod 400 core.pem
$ ssh -i core.pem core@10.0.0.3
   ______                ____  _____
  / ____/___  ________  / __ \/ ___/
 / /   / __ \/ ___/ _ \/ / / /\__ \
/ /___/ /_/ / /  /  __/ /_/ /___/ /
\____/\____/_/   \___/\____//____/

core@10-0-0-3 ~ $