updated demo1

demo1-getting-started.py

 # Example for Cloud Computing Course Master AI / GSD
 #
-# based on the tutorial: https://developer.openstack.org/firstapp-libcloud/
 # uses libCloud: https://libcloud.apache.org/
 # libCloud API documentation: https://libcloud.readthedocs.io/en/latest/
 # OpenStack API documentation: https://developer.openstack.org/
+# this code was initially based on the former tutorial: https://developer.openstack.org/firstapp-libcloud/
 
 import getpass
 
 from libcloud.compute.providers import get_driver
 from libcloud.compute.types import Provider
 
-# Please use 1-25 for X in username, project etc., as coordinated in the lab sessions
+# Please use 1-29 for X in the following variable to specify your group number. (will be used for the username,
+# project etc., as coordinated in the lab sessions)
+
+group_number = 30
+
+########################################################################################################################
+#
+#  no changes necessary below this line
+#
+########################################################################################################################
 
 # web service endpoint of the private cloud infrastructure
-auth_url = 'https://private-cloud2.informatik.hs-fulda.de:5000'
+auth_url = 'https://private-cloud.informatik.hs-fulda.de:5000'
 # your username in OpenStack
-auth_username = 'CloudCompX'
+auth_username = 'CloudComp' + str(group_number)
 # your project in OpenStack
-project_name = 'CloudCompGrpX'
+project_name = 'CloudComp' + str(group_number)
+# A network in the project the started instance will be attached to
+project_network = 'CloudComp' + str(group_number) + '-net'
+
+# The image to look for and use for the started instance
+ubuntu_image_name = "Ubuntu 18.04 - Bionic Beaver - 64-bit - Cloud Based Image"
 
 # default region
 region_name = 'RegionOne'
 # domain to use, "default" for local accounts, "hsfulda" for LDAP of DVZ, e.g., using fdaiXXXX as auth_username
 domain_name = "default"
 
-# The image to look for and use for the started instance
-ubuntu_image_name = "Ubuntu 14.04 - Trusty Tahr - 64-bit - Cloud Based Image"
-# A network in the project the started instance will be attached to
-project_network = "CloudCompGrpX-net"
-
 
 def main():
     # get the password from user
@@ -39,6 +48,9 @@ def main():
     # make sure to include ex_domain_name and ex_force_auth_version='3.x_password', as they are needed in our
     # environment
     provider = get_driver(Provider.OPENSTACK)
+
+    print("Opening connection to %s as %s..." % (auth_url, auth_username))
+
     conn = provider(auth_username,
                     auth_password,
                     ex_force_auth_url=auth_url,
@@ -47,6 +59,9 @@ def main():
                     ex_force_service_region=region_name,
                     ex_domain_name=domain_name)
 
+    print("Getting images and selecting desired one...")
+    print("=========================================================================")
+
     # get a list of images offered in the cloud context (e.g. Ubuntu 14.04, Ubuntu 16.04, cirros, ...)
     images = conn.list_images()
     image = ''
@@ -55,16 +70,25 @@ def main():
             image = img
             print(img)
 
+    print("Getting flavors...")
+    print("=========================================================================")
+
     # get a list of flavors offered in the cloud context (e.g. m1.small, m1.medium, ...)
     flavors = conn.list_sizes()
     for flavor in flavors:
         print(flavor)
 
+    print("Selecting desired flavor...")
+    print("=========================================================================")
+
     # get the flavor with id 2
     flavor_id = '2'
     flavor = conn.ex_get_size(flavor_id)
     print(flavor)
 
+    print("Selecting desired network...")
+    print("=========================================================================")
+
     # get a list of networks in the cloud context
     networks = conn.ex_list_networks()
     network = ''
@@ -72,17 +96,26 @@ def main():
         if net.name == project_network:
             network = net
 
+    print("Create instance 'testing'...")
+    print("=========================================================================")
+
     # create a new instance with the name "testing"
     # make sure to provide networks (networks={network}) the instance should be attached to
     instance_name = 'testing'
     testing_instance = conn.create_node(name=instance_name, image=image, size=flavor, networks={network})
     print(testing_instance)
 
+    print("Showing all running instances...")
+    print("=========================================================================")
+
     # show all instances (running nodes) in the cloud context
     instances = conn.list_nodes()
     for instance in instances:
         print(instance)
 
+    print("Destroying instance...")
+    print("=========================================================================")
+
     # destroy the instance we have just created
     conn.destroy_node(testing_instance)