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# Example for Cloud Computing Course Master AI / GSD
#
# 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 1-29 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 in this example
#
########################################################################################################################
# web service endpoint of the private cloud infrastructure
auth_url = 'https://private-cloud.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"
# TODO: Ubuntu >18.04 would require major updates to faafo example again/better option: complete rewrite of example?
# default region
region_name = 'RegionOne'
# domain to use, "default" for local accounts, "hsfulda" for RZ LDAP, e.g., using fdaiXXXX as auth_username
# domain_name = "default"
def main():
# 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(("Opening connection to %s as %s..." % (auth_url, 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()