adapted demos for new Charmed OpenStack environment

2024-04-12 13:53:47 +02:00
parent 5e17f171ba
commit f63e5ebd8d
6 changed files with 923 additions and 0 deletions
--- a/demo1_getting_started.py
+++ b/demo1_getting_started.py
@ -0,0 +1,144 @@
+"""Example for Cloud Computing Course Master AI / GSD"""
+
+# This script demonstrates how to use libcloud to start an instance in an OpenStack environment.
+# The script will start an instance, list all instances, and then destroy the instance again.
+#
+# The script uses the libcloud library to interact with the OpenStack API.
+# Need to install libcloud first: pip install apache-libcloud
+#
+# 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/
+
+# Only needed for the password prompt:
+# import getpass
+
+from libcloud.compute.providers import get_driver
+from libcloud.compute.types import Provider
+
+# For our new Charmed OpenStack private cloud, we need to specify the path to the
+# root CA certificate
+import libcloud.security
+libcloud.security.CA_CERTS_PATH = ['./root-ca.crt']
+# Disable SSL certificate verification (not recommended for production)
+# libcloud.security.VERIFY_SSL_CERT = False
+
+# Please use 1-29 for 0 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 = 0
+
+
+###############################################################################################
+#
+#  no changes necessary below this line in this example
+#
+###############################################################################################
+
+# web service endpoint of the private cloud infrastructure
+# auth_url = 'https://private-cloud.informatik.hs-fulda.de:5000'
+AUTH_URL = 'https://10.32.4.182:5000'
+# auth_url = 'https://private-cloud2.informatik.hs-fulda.de:5000'
+# your username in OpenStack
+AUTH_USERNAME = 'CloudComp' + str(GROUP_NUMBER)
+# your project in OpenStack
+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"
+UBUNTU_IMAGE_NAME = "auto-sync/ubuntu-jammy-22.04-amd64-server-20240319-disk1.img"
+
+# default region
+REGION_NAME = 'RegionOne'
+# domain to use, "default" for local accounts, formerly "hsfulda" for LDAP accounts etc.
+# domain_name = "default"
+
+
+def main():  # noqa: C901 pylint: disable=too-many-branches,too-many-statements,too-many-locals,missing-function-docstring
+    # get the password from user
+    # auth_password = getpass.getpass("Enter your OpenStack password:")
+    auth_password = "demo"
+
+    # instantiate a connection to the OpenStack private cloud
+    # make sure to include ex_force_auth_version='3.x_password', as needed in our environment
+    provider = get_driver(Provider.OPENSTACK)
+
+    print(f"Opening connection to {AUTH_URL} as {AUTH_USERNAME}...")
+
+    conn = provider(AUTH_USERNAME,
+                    auth_password,
+                    ex_force_auth_url=AUTH_URL,
+                    ex_force_auth_version='3.x_password',
+                    ex_tenant_name=PROJECT_NAME,
+                    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 20.04, cirros, ...)
+    images = conn.list_images()
+    image = ''
+    for img in images:
+        if img.name == UBUNTU_IMAGE_NAME:
+            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 = ''
+    for net in networks:
+        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)
+
+
+# method that is called when the script is started from the command line
+if __name__ == '__main__':
+    main()