146 lines
5.6 KiB
Python
146 lines
5.6 KiB
Python
"""Example for Cloud Computing Course Master AI / GSD"""
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# This script demonstrates how to use libcloud to start an instance in an OpenStack environment.
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# The script will start an instance, list all instances, and then destroy the instance again.
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#
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# The script uses the libcloud library to interact with the OpenStack API.
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# Need to install libcloud first: pip install apache-libcloud
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#
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# libCloud: https://libcloud.apache.org/
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# libCloud API documentation: https://libcloud.readthedocs.io/en/latest/
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# OpenStack API documentation: https://developer.openstack.org/
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# this code was initially based on the former tutorial:
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# https://developer.openstack.org/firstapp-libcloud/
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# Only needed for the password prompt:
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# import getpass
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from libcloud.compute.providers import get_driver
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from libcloud.compute.types import Provider
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# For our new Charmed OpenStack private cloud, we need to specify the path to the
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# root CA certificate
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import libcloud.security
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libcloud.security.CA_CERTS_PATH = ['./root-ca.crt']
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# Disable SSL certificate verification (not recommended for production)
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# libcloud.security.VERIFY_SSL_CERT = False
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# Please use 1-29 for 0 in the following variable to specify your group number.
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# (will be used for the username, project etc., as coordinated in the lab sessions)
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GROUP_NUMBER = 0
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###############################################################################################
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#
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# no changes necessary below this line in this example
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#
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###############################################################################################
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# web service endpoint of the private cloud infrastructure
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# auth_url = 'https://private-cloud.informatik.hs-fulda.de:5000'
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AUTH_URL = 'https://10.32.4.182:5000'
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# auth_url = 'https://private-cloud2.informatik.hs-fulda.de:5000'
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# your username in OpenStack
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AUTH_USERNAME = 'CloudComp' + str(GROUP_NUMBER)
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# your project in OpenStack
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PROJECT_NAME = 'CloudComp' + str(GROUP_NUMBER)
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# A network in the project the started instance will be attached to
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PROJECT_NETWORK = 'CloudComp' + str(GROUP_NUMBER) + '-net'
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# The image to look for and use for the started instance
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# ubuntu_image_name = "Ubuntu 18.04 - Bionic Beaver - 64-bit - Cloud Based Image"
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#UBUNTU_IMAGE_NAME = "auto-sync/ubuntu-jammy-22.04-amd64-server-20240319-disk1.img"
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UBUNTU_IMAGE_NAME = "ubuntu-22.04-jammy-x86_64"
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# default region
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REGION_NAME = 'RegionOne'
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# domain to use, "default" for local accounts, formerly "hsfulda" for LDAP accounts etc.
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# domain_name = "default"
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def main(): # noqa: C901 pylint: disable=too-many-branches,too-many-statements,too-many-locals,missing-function-docstring
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# get the password from user
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# auth_password = getpass.getpass("Enter your OpenStack password:")
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auth_password = "demo"
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# instantiate a connection to the OpenStack private cloud
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# make sure to include ex_force_auth_version='3.x_password', as needed in our environment
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provider = get_driver(Provider.OPENSTACK)
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print(f"Opening connection to {AUTH_URL} as {AUTH_USERNAME}...")
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conn = provider(AUTH_USERNAME,
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auth_password,
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ex_force_auth_url=AUTH_URL,
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ex_force_auth_version='3.x_password',
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ex_tenant_name=PROJECT_NAME,
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ex_force_service_region=REGION_NAME)
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# ex_domain_name=domain_name)
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print("Getting images and selecting desired one...")
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print("=========================================================================")
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# get a list of images offered in the cloud context (e.g. Ubuntu 20.04, cirros, ...)
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images = conn.list_images()
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image = ''
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for img in images:
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if img.name == UBUNTU_IMAGE_NAME:
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image = img
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print(img)
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print("Getting flavors...")
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print("=========================================================================")
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# get a list of flavors offered in the cloud context (e.g. m1.small, m1.medium, ...)
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flavors = conn.list_sizes()
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for flavor in flavors:
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print(flavor)
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print("Selecting desired flavor...")
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print("=========================================================================")
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# get the flavor with id 2
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flavor_id = '2'
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flavor = conn.ex_get_size(flavor_id)
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print(flavor)
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print("Selecting desired network...")
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print("=========================================================================")
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# get a list of networks in the cloud context
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networks = conn.ex_list_networks()
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network = ''
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for net in networks:
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if net.name == PROJECT_NETWORK:
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network = net
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print("Create instance 'testing'...")
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print("=========================================================================")
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# create a new instance with the name "testing"
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# make sure to provide networks (networks={network}) the instance should be attached to
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instance_name = 'testing'
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testing_instance = conn.create_node(name=instance_name, image=image, size=flavor,
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networks={network})
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print(testing_instance)
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print("Showing all running instances...")
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print("=========================================================================")
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# show all instances (running nodes) in the cloud context
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instances = conn.list_nodes()
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for instance in instances:
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print(instance)
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print("Destroying instance...")
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print("=========================================================================")
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# destroy the instance we have just created
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conn.destroy_node(testing_instance)
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# method that is called when the script is started from the command line
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if __name__ == '__main__':
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main()
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