Connect OpenStackSDK to your local DevStack cloud

• A quick guide that provides context and references behind each step.
• The current release of OpenStack at the time of writing is Yoga.
• This guide and its reference links may become outdated when the next major version of OpenStack is released.

1. Install DevStack to your Linux System if you haven't already.

2. Ensure your DevStack cloud is installed properly and its services are running:

   sudo systemctl status "devstack@*"

3. Create the clouds.yaml configuration file for openstacksdk:

   cd ~ # your normal user account you use, not the user account with the DevStack environment installed
   mkdir .config
   touch clouds.yaml

   This file provides the list of OpenStack clouds the openstack module (within openstacksdk) can connect to.

4. Paste the following config info into 'clouds.yaml'. Update the configuration based on your DevStack login credentials:

   clouds:
       devstack:
           auth:
           auth_url: http://127.0.0.1/identity 	# 127.0.0.1 - i.e., localhost
           password: password 			# replace with $OS_PASSWORD; defined in 'local.conf' within your local DevStack repository
           project_domain_id: default
           project_name: demo			# replace with $OS_PROJECT_NAME; default is 'demo'
           user_domain_id: default
           username: demo				# replace with $OS_USERNAME; default is 'demo'

   View openrc to learn more about how your DevStack login credentials are determined.

5. Connect to your DevStack cloud using the openstack module in openstacksdk:

   In your python3 environment with openstacksdk installed:

   import openstack
   openstack.enable_logging(debug=True) # will show HTTP request info when we get the list of servers
   conn = openstack.connect(cloud='devstack')
   for server in conn.compute.servers(): # using proxy layer - 'compute.servers'
       # will return None if you haven't setup a server (i.e., you just setup your DevStack environment and haven't messed with it)
       # regardless, debug logging will be show up if enabled
       print(server.to_dict()) 

   If you don't get an error from the openstacksdk package (e.g., keystoneauth1.exceptions.http.Unauthorized) then you should be good to go!