Fix README.md

Signed-off-by: Nobuhiro MIKI <nob@bobuhiro11.net>

Author: bobuhiro11

README.md

@@ -3,43 +3,63 @@
 This project easily deploys OpenStack in docker & docker-compose.
 This is mainly for development purpose.
 
-NOTE: This is only tested on x64 Ubuntu 20.04 machine. It may work
+NOTE: This is only tested on **x64 Ubuntu 20.04 machine**. It may work
 on other Linux Distributions. Other CPU architectures and operating
 systems cannot be supported.
 
 # Usage
 
-`docker-compose` will execute the initialization process of the
-devstack and automatically launch the major OpenStack components.
-This will take about 30 minutes.
+The docker-compose command launches an OpenStack environment based
+on preconfigured container images. The images are huge and will take
+some time to download, but once complete, you should be up and running
+in less than a minute thereafter.
+
+An example is shown below:
 
 ```bash
-sudo docker-compose up -d
-sudo docker-compose logs -f
-# controller    | This is your host IP address: 172.28.0.2
-# controller    | Horizon is now available at http://172.28.0.2/dashboard
-# controller    | Keystone is serving at http://172.28.0.2/identity/
-# controller    | The default users are: admin and demo
-# controller    | The password: nomoresecret
-# controller    |
-# controller    | Services are running under systemd unit files.
-# controller    | For more information see:
-# controller    | https://docs.openstack.org/devstack/latest/systemd.html
-# controller    |
-# controller    | DevStack Version: 2023.1
-# controller    | Change:
-# controller    | OS Version: Ubuntu 20.04 focal
+curl -sLO https://raw.githubusercontent.com/bobuhiro11/containerized-devstack/main/docker-compose.yaml
+sudo docker-compose up
 ```
 
 You can use the OpenStack CLI in the container.
 
 ```bash
-sudo docker-compose exec --user stack controller /bin/bash -c 'openstack image list'
-# +--------------------------------------+--------------------------+--------+
-# | ID                                   | Name                     | Status |
-# +--------------------------------------+--------------------------+--------+
-# | 77b07900-9dab-4ba9-b169-883868e8ecf9 | cirros-0.5.2-x86_64-disk | active |
-# +--------------------------------------+--------------------------+--------+
+sudo docker-compose exec controller openstack compute service list
+# +--------------------------------------+----------------+------------+----------+---------+-------+----------------------------+
+# | ID                                   | Binary         | Host       | Zone     | Status  | State | Updated At                 |
+# +--------------------------------------+----------------+------------+----------+---------+-------+----------------------------+
+# | 2d1c874e-3cba-4098-a8c9-7ca8d7f69e1d | nova-scheduler | controller | internal | enabled | up    | 2023-04-19T03:18:49.000000 |
+# | 70ae8443-fce7-465a-a69b-455e661e80c1 | nova-conductor | controller | internal | enabled | up    | 2023-04-19T03:18:49.000000 |
+# | 1a489657-cbb7-4efd-8ab6-a597de8aac1a | nova-conductor | controller | internal | enabled | up    | 2023-04-19T03:18:48.000000 |
+# | 7f9d98c2-05e6-40c4-b59d-d5cd0ece7f7f | nova-compute   | controller | nova     | enabled | up    | 2023-04-19T03:18:50.000000 |
+# | a01e676b-ed7b-4c29-be20-599e9e6564e4 | nova-compute   | compute-2  | nova     | enabled | up    | 2023-04-19T03:18:54.000000 |
+# | 3a3ec69d-f2d3-477a-b0b5-14b9924e1b5b | nova-compute   | compute-1  | nova     | enabled | up    | 2023-04-19T03:18:55.000000 |
+# +--------------------------------------+----------------+------------+----------+---------+-------+----------------------------+
+
+sudo docker-compose exec controller openstack network agent list
+# +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
+# | ID                                   | Agent Type         | Host       | Availability Zone | Alive | State | Binary                    |
+# +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
+# | 6652233d-141f-4b04-ad62-74304afb4deb | Open vSwitch agent | controller | None              | :-)   | UP    | neutron-openvswitch-agent |
+# | cf7aec73-0a3d-4b71-ae9b-630c8075f0e5 | DHCP agent         | controller | nova              | :-)   | UP    | neutron-dhcp-agent        |
+# | ee925744-dd85-4cfb-9dae-9f2ccc3e1bff | Metadata agent     | controller | None              | :-)   | UP    | neutron-metadata-agent    |
+# | ef62635e-1da2-4689-b7a6-afc46b7a1c16 | L3 agent           | controller | nova              | :-)   | UP    | neutron-l3-agent          |
+# ...
+# +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
+```
+
+The image contains a script `/bin/test.bash` to check some operations.
+This confirms that the VM is booted.
+
+```bash
+sudo docker-compose exec controller /bin/test.bash
+# + nova boot --image cirros-0.5.2-x86_64-disk --flavor m1.medium ...
+# + nova list
+# +--------------------------------------+--------+--------+------------+-------------+-------------------+
+# | ID                                   | Name   | Status | Task State | Power State | Networks          |
+# +--------------------------------------+--------+--------+------------+-------------+-------------------+
+# | 0c097d40-7bfe-4d1e-af01-02b95018397a | testvm | ACTIVE | -          | Running     | private=10.0.0.29 |
+# +--------------------------------------+--------+--------+------------+-------------+-------------------+
 ```
 
 # Reference