adapted demos for new Charmed OpenStack environment
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Sebastian Rieger
268
demo2_instance_with_init_script.py
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268
demo2_instance_with_init_script.py
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"""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 create and install a new SSH key pair, create a security group, start an instance
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# and deploy a demo app (faafo) using cloud-init and assign a floating IP to the instance.
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#
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# cloud-init is a multi-distribution package that handles early initialization of a cloud instance.
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# It is supported by many major cloud providers, including OpenStack.
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# cloud-init documentation: https://cloudinit.readthedocs.io/en/latest/
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# Needed if the password should be prompted for:
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# import getpass
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import os
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import sys
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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 root
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# 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 as environment variable GROUP_NUMBER 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 = os.environ.get('GROUP_NUMBER')
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if group_number is None:
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sys.exit('Please set the GROUP_NUMBER environment variable to your group number,\n'
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'e.g., on Windows:\n'
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' "$env:GROUP_NUMBER=0" or "set GROUP_NUMBER=0"\n'
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'or on Linux/MacOS:\n'
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' "export GROUP_NUMBER=0" or "set GROUP_NUMBER=0"')
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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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print(f'Using username: {AUTH_USERNAME}\n')
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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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# The public key to be used for SSH connection, please make sure, that you have the
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# corresponding private key
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#
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# id_rsa.pub should look like this (standard sshd pubkey format):
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# ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAw+J...F3w2mleybgT1w== user@HOSTNAME
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KEYPAIR_NAME = 'srieger-pub'
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PUB_KEY_FILE = '~/.ssh/id_rsa.pub'
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FLAVOR_NAME = 'm1.small'
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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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###########################################################################
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#
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# get credentials
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#
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###########################################################################
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# if "OS_PASSWORD" in os.environ:
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# auth_password = os.environ["OS_PASSWORD"]
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# else:
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# auth_password = getpass.getpass("Enter your OpenStack password:")
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auth_password = "demo"
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###########################################################################
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#
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# create connection
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#
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###########################################################################
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provider = get_driver(Provider.OPENSTACK)
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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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###########################################################################
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#
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# get image, flavor, network for instance creation
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#
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###########################################################################
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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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flavors = conn.list_sizes()
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flavor = ''
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for flav in flavors:
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if flav.name == FLAVOR_NAME:
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flavor = conn.ex_get_size(flav.id)
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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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###########################################################################
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#
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# create keypair dependency
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#
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###########################################################################
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print('Checking for existing SSH key pair...')
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keypair_exists = False
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for keypair in conn.list_key_pairs():
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if keypair.name == KEYPAIR_NAME:
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keypair_exists = True
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if keypair_exists:
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print('Keypair ' + KEYPAIR_NAME + ' already exists. Skipping import.')
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else:
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print('adding keypair...')
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conn.import_key_pair_from_file(KEYPAIR_NAME, PUB_KEY_FILE)
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for keypair in conn.list_key_pairs():
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print(keypair)
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###########################################################################
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#
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# create security group dependency
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#
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###########################################################################
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print('Checking for existing security group...')
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security_group_name = 'all-in-one'
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security_group_exists = False
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all_in_one_security_group = ''
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for security_group in conn.ex_list_security_groups():
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if security_group.name == security_group_name:
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all_in_one_security_group = security_group
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security_group_exists = True
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if security_group_exists:
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print('Security Group ' + all_in_one_security_group.name + ' already exists. '
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'Skipping creation.')
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else:
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all_in_one_security_group = conn.ex_create_security_group(security_group_name,
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'network access for '
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'all-in-one application.')
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conn.ex_create_security_group_rule(all_in_one_security_group, 'TCP', 80, 80)
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conn.ex_create_security_group_rule(all_in_one_security_group, 'TCP', 22, 22)
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for security_group in conn.ex_list_security_groups():
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print(security_group)
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###########################################################################
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#
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# create all-in-one instance
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#
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###########################################################################
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hsfd_faafo_cloud_init_script = 'https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/master/faafo/contrib/install.sh' # noqa: E501 pylint: disable=line-too-long
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# testing / faafo dev branch:
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# hsfd_faafo_cloud_init_script = 'https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/branch/dev_faafo/faafo/contrib/install.sh' # noqa: E501 pylint: disable=line-too-long
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userdata = '#!/usr/bin/env bash\n' \
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f'curl -L -s {hsfd_faafo_cloud_init_script} | bash -s -- ' \
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'-i faafo -i messaging -r api -r worker -r demo\n'
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print('\nUsing cloud-init userdata:\n"' + userdata + '"\n')
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print('Checking for existing instance...')
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instance_name = 'all-in-one'
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instance_exists = False
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testing_instance = ''
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for instance in conn.list_nodes():
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if instance.name == instance_name:
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testing_instance = instance
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instance_exists = True
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if instance_exists:
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print('Instance ' + testing_instance.name + ' already exists. Skipping creation.')
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exit()
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else:
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print('Starting new all-in-one instance and wait until it is running...')
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testing_instance = conn.create_node(name=instance_name,
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image=image,
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size=flavor,
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networks=[network],
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ex_keyname=KEYPAIR_NAME,
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ex_userdata=userdata,
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ex_security_groups=[all_in_one_security_group])
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conn.wait_until_running(nodes=[testing_instance], timeout=120, ssh_interface='private_ips')
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###########################################################################
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#
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# assign all-in-one instance floating ip
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#
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###########################################################################
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private_ip = None
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if len(testing_instance.private_ips):
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private_ip = testing_instance.private_ips[0]
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print(f'Private IP found: {private_ip}')
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public_ip = None
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if len(testing_instance.public_ips):
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public_ip = testing_instance.public_ips[0]
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print(f'Public IP found: {public_ip}')
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print('Checking for unused Floating IP...')
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unused_floating_ip = None
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for floating_ip in conn.ex_list_floating_ips():
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if not floating_ip.node_id:
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unused_floating_ip = floating_ip
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break
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if not unused_floating_ip and len(conn.ex_list_floating_ip_pools()):
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pool = conn.ex_list_floating_ip_pools()[0]
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print(f'Allocating new Floating IP from pool: {pool}')
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unused_floating_ip = pool.create_floating_ip()
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if public_ip:
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print('Instance ' + testing_instance.name + ' already has a public ip. Skipping attachment.')
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elif unused_floating_ip:
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conn.ex_attach_floating_ip_to_node(testing_instance, unused_floating_ip)
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actual_ip_address = None
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if public_ip:
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actual_ip_address = public_ip
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elif unused_floating_ip:
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actual_ip_address = unused_floating_ip.ip_address
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elif private_ip:
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actual_ip_address = private_ip
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print('\n\n#### Deployment finished\n\n')
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print('After some minutes, as soon as cloud-init installed required packages and the\n'
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'faafo app, (First App Application For OpenStack) fractals demo will be available\n'
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f'at http://{actual_ip_address}\n')
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print('You can use ssh to login to the instance using your private key. Default user name for official Ubuntu\n'
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f'Cloud Images is: ubuntu, so you can use, e.g.: "ssh -i ~/.ssh/id_rsa ubuntu@{actual_ip_address}" if your\n'
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'private key is in the default location.\n\n'
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'After login, you can list available fractals using "faafo list". \n'
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'To request the generation of new fractals, you can use "faafo create".\n\n'
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'You can also see other options to use the faafo example cloud service using "faafo -h".\n\n'
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'If you cannot start faafo command and/or do not see the webpage, you can check the Instance Console Log of\n'
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'the instance, e.g., in OpenStack web interface or look at "tail -f /var/log/cloud-init*.log" for the\n'
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'cloud-init log files.\n')
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if __name__ == '__main__':
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main()
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