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"""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 multiple instances splitting up the faafo monolithic application into# a microservice architecture with scalable api (controller) and worker instances using a# message queue and a database
# Needed if the password should be prompted for:# import getpassimport osimport sysimport time
from libcloud.compute.providers import get_driverfrom libcloud.compute.types import Provider
# For our new Charmed OpenStack private cloud, we need to specify the path to the root# CA certificateimport libcloud.securitylibcloud.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 as environment variable GROUP_NUMBER to specify your group number.# (will be used for the username, project etc., as coordinated in the lab sessions)
group_number = os.environ.get('GROUP_NUMBER')if group_number is None: sys.exit('Please set the GROUP_NUMBER environment variable to your group number,\n' 'e.g., on Windows:\n' ' "$env:GROUP_NUMBER=0" or "set GROUP_NUMBER=0"\n' 'or on Linux/MacOS:\n' ' "export GROUP_NUMBER=0" or "set GROUP_NUMBER=0"')
# 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 OpenStackAUTH_USERNAME = 'CloudComp' + str(group_number)print(f'Using username: {AUTH_USERNAME}\n')# your project in OpenStackPROJECT_NAME = 'CloudComp' + str(group_number)# A network in the project the started instance will be attached toPROJECT_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"UBUNTU_IMAGE_NAME = "ubuntu-22.04-jammy-x86_64"
# The public key to be used for SSH connection, please make sure, that you have the# corresponding private key## id_rsa.pub should look like this (standard sshd pubkey format):# ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAw+J...F3w2mleybgT1w== user@HOSTNAMEKEYPAIR_NAME = 'srieger-pub'PUB_KEY_FILE = '~/.ssh/id_rsa.pub'
FLAVOR_NAME = 'm1.small'
# default regionREGION_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 credentials # ###########################################################################
# if "OS_PASSWORD" in os.environ: # auth_password = os.environ["OS_PASSWORD"] # else: # auth_password = getpass.getpass("Enter your OpenStack password:") auth_password = "demo"
########################################################################### # # create connection # ###########################################################################
provider = get_driver(Provider.OPENSTACK) 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)
########################################################################### # # get image, flavor, network for instance creation # ###########################################################################
images = conn.list_images() image = '' for img in images: if img.name == UBUNTU_IMAGE_NAME: image = img
flavors = conn.list_sizes() flavor = '' for flav in flavors: if flav.name == FLAVOR_NAME: flavor = conn.ex_get_size(flav.id)
networks = conn.ex_list_networks() network = '' for net in networks: if net.name == PROJECT_NETWORK: network = net
########################################################################### # # create keypair dependency # ###########################################################################
print('Checking for existing SSH key pair...') keypair_exists = False for keypair in conn.list_key_pairs(): if keypair.name == KEYPAIR_NAME: keypair_exists = True
if keypair_exists: print(('Keypair ' + KEYPAIR_NAME + ' already exists. Skipping import.')) else: print('adding keypair...') conn.import_key_pair_from_file(KEYPAIR_NAME, PUB_KEY_FILE)
for keypair in conn.list_key_pairs(): print(keypair)
########################################################################### # # clean up resources from previous demos # ###########################################################################
# destroy running demo instances for instance in conn.list_nodes(): if instance.name in ['all-in-one', 'app-worker-1', 'app-worker-2', 'app-worker-3', 'app-controller', 'app-services', 'app-api-1', 'app-api-2']: print(f'Destroying Instance: ${instance.name}') conn.destroy_node(instance)
# wait until all nodes are destroyed to be able to remove depended security groups nodes_still_running = True while nodes_still_running: nodes_still_running = False time.sleep(3) instances = conn.list_nodes() for instance in instances: # if we see any demo instances still running continue to wait for them to stop if instance.name in ['all-in-one', 'app-worker-1', 'app-worker-2', 'app-controller']: nodes_still_running = True print('There are still instances running, waiting for them to be destroyed...')
# delete security groups for group in conn.ex_list_security_groups(): if group.name in ['control', 'worker', 'api', 'services']: print(f'Deleting security group: ${group.name}') conn.ex_delete_security_group(group)
########################################################################### # # create security group dependency # ###########################################################################
def get_security_group(connection, security_group_name): """A helper function to check if security group already exists""" print(('Checking for existing ' + security_group_name + ' security group...')) for security_grp in connection.ex_list_security_groups(): if security_grp.name == security_group_name: print(('Security Group ' + security_group_name + ' already exists. Skipping creation.')) return worker_security_group return False
if not get_security_group(conn, "api"): api_security_group = conn.ex_create_security_group('api', 'for API services only') conn.ex_create_security_group_rule(api_security_group, 'TCP', 80, 80) conn.ex_create_security_group_rule(api_security_group, 'TCP', 22, 22) else: api_security_group = get_security_group(conn, "api")
if not get_security_group(conn, "worker"): worker_security_group = conn.ex_create_security_group( 'worker', 'for services that run on a worker node') conn.ex_create_security_group_rule(worker_security_group, 'TCP', 22, 22) else: worker_security_group = get_security_group(conn, "worker")
if not get_security_group(conn, "control"): controller_security_group = conn.ex_create_security_group( 'control', 'for services that run on a control node') conn.ex_create_security_group_rule(controller_security_group, 'TCP', 22, 22) conn.ex_create_security_group_rule(controller_security_group, 'TCP', 80, 80) conn.ex_create_security_group_rule(controller_security_group, 'TCP', 5672, 5672, source_security_group=worker_security_group)
if not get_security_group(conn, "services"): services_security_group = conn.ex_create_security_group( 'services', 'for DB and AMQP services only') conn.ex_create_security_group_rule(services_security_group, 'TCP', 22, 22) conn.ex_create_security_group_rule(services_security_group, 'TCP', 3306, 3306, source_security_group=api_security_group) conn.ex_create_security_group_rule(services_security_group, 'TCP', 5672, 5672, source_security_group=worker_security_group) conn.ex_create_security_group_rule(services_security_group, 'TCP', 5672, 5672, source_security_group=api_security_group) else: services_security_group = get_security_group(conn, "services")
for security_group in conn.ex_list_security_groups(): print(security_group)
########################################################################### # # get floating ip helper function # ###########################################################################
def get_floating_ip(connection): """A helper function to re-use available Floating IPs""" unused_floating_ip = None for float_ip in connection.ex_list_floating_ips(): if not float_ip.node_id: unused_floating_ip = float_ip break if not unused_floating_ip: pool = connection.ex_list_floating_ip_pools()[0] unused_floating_ip = pool.create_floating_ip() return unused_floating_ip
########################################################################### # # create app-services instance (database & messaging) # ###########################################################################
userdata_service = '#!/usr/bin/env bash\n' \ 'curl -L -s https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-' \ 'examples/raw/master/faafo/contrib/install.sh | bash -s -- ' \ '-i database -i messaging\n' print('\nUsing cloud-init userdata for service:\n"' + userdata_service + '"\n')
print('Starting new app-services instance and wait until it is running...') instance_services = conn.create_node(name='app-services', image=image, size=flavor, networks=[network], ex_keyname=KEYPAIR_NAME, ex_userdata=userdata_service, ex_security_groups=[services_security_group]) instance_services = conn.wait_until_running(nodes=[instance_services], timeout=120, ssh_interface='private_ips')[0][0] services_ip = instance_services.private_ips[0]
########################################################################### # # create app-api instances # ###########################################################################
userdata_api = '#!/usr/bin/env bash\n' \ 'curl -L -s https://gogs.informatik.hs-fulda.de/srieger/' \ 'cloud-computing-msc-ai-examples/raw/master/faafo/contrib/' \ 'install.sh | bash -s -- ' \ f'-i faafo -r api -m "amqp://faafo:guest@{services_ip}:5672/" ' \ f'-d "mysql+pymysql://faafo:password@{services_ip}:3306/faafo"' print('\nUsing cloud-init userdata for api:\n"' + userdata_api + '"\n')
print('Starting new app-api-1 instance and wait until it is running...') instance_api_1 = conn.create_node(name='app-api-1', image=image, size=flavor, networks=[network], ex_keyname=KEYPAIR_NAME, ex_userdata=userdata_api, ex_security_groups=[api_security_group])
print('Starting new app-api-2 instance and wait until it is running...') instance_api_2 = conn.create_node(name='app-api-2', image=image, size=flavor, networks=[network], ex_keyname=KEYPAIR_NAME, ex_userdata=userdata_api, ex_security_groups=[api_security_group])
instance_api_1 = conn.wait_until_running(nodes=[instance_api_1], timeout=120, ssh_interface='private_ips')[0][0] api_1_ip = instance_api_1.private_ips[0] instance_api_2 = conn.wait_until_running(nodes=[instance_api_2], timeout=120, ssh_interface='private_ips')[0][0] # api_2_ip = instance_api_2.private_ips[0]
for instance in [instance_api_1, instance_api_2]: floating_ip = get_floating_ip(conn) conn.ex_attach_floating_ip_to_node(instance, floating_ip) print(('allocated %(ip)s to %(host)s' % {'ip': floating_ip.ip_address, 'host': instance.name}))
########################################################################### # # create worker instances # ###########################################################################
userdata_worker = '#!/usr/bin/env bash\n' \ 'curl -L -s https://gogs.informatik.hs-fulda.de/srieger/' \ 'cloud-computing-msc-ai-examples/raw/master/faafo/contrib/' \ 'install.sh | bash -s -- ' \ f'-i faafo -r worker -e "http://{api_1_ip}" '\ f'-m "amqp://faafo:guest@{services_ip}:5672/"' print('\nUsing cloud-init userdata for worker:\n"' + userdata_worker + '"\n')
# userdata_api-api-2 = '''#!/usr/bin/env bash # curl -L -s ''' + hsfd_faafo_cloud_init_script + ''' | bash -s -- \ # -i faafo -r worker -e 'http://%(api_2_ip)s' -m 'amqp://faafo:guest@%(services_ip)s:5672/' # ''' % {'api_2_ip': api_2_ip, 'services_ip': services_ip}
print('Starting new app-worker-1 instance and wait until it is running...') instance_worker_1 = conn.create_node(name='app-worker-1', image=image, size=flavor, networks=[network], ex_keyname=KEYPAIR_NAME, ex_userdata=userdata_worker, ex_security_groups=[worker_security_group])
print('Starting new app-worker-2 instance and wait until it is running...') instance_worker_2 = conn.create_node(name='app-worker-2', image=image, size=flavor, networks=[network], ex_keyname=KEYPAIR_NAME, ex_userdata=userdata_worker, ex_security_groups=[worker_security_group])
# do not start worker 3 initially, can be started using scale-out-add-worker.py demo
#print('Starting new app-worker-3 instance and wait until it is running...') #instance_worker_3 = conn.create_node(name='app-worker-3', # image=image, size=flavor, # networks=[network], # ex_keyname=keypair_name, # ex_userdata=userdata_worker, # ex_security_groups=[worker_security_group])
print(instance_worker_1) print(instance_worker_2) #print(instance_worker_3)
if __name__ == '__main__': main()
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