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import configparserfrom os.path import expanduser
# import libcloud.securityimport time
from libcloud.compute.base import NodeImagefrom libcloud.compute.base import NodeStatefrom libcloud.compute.providers import get_driver as compute_get_driverfrom libcloud.compute.types import Provider as compute_Provider
from libcloud.loadbalancer.base import Member, Algorithmfrom libcloud.loadbalancer.types import Provider as loadbalancer_Providerfrom libcloud.loadbalancer.providers import get_driver as loadbalancer_get_driver
home = expanduser("~")
# requirements:# services: EC2, ELB# resources: 2 instances, (1 keypair, 2 security groups),# 1 (Classic) Elastic Load Balancer, expensive! delete it after you used it!
# The image to look for and use for the started instanceubuntu_image_name = 'ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-20210128'# ubuntu_image_name = 'ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-20210128'# TODO: 18.04, currently still needed for faafo, need to port faafo demo app to 20.04 or higher and python3...
# The public key to be used for SSH connection, please make sure, that you have the corresponding private key
# use existing vockey in AWS Lab env from vocareum, enables login directly# from the lab's terminal:## ssh -i ~/.ssh/labuser.pem ubuntu@<public-ip>
keypair_name = "vockey"
# keypair_name = 'srieger-pub'pub_key_file = home + '/.ssh/id_rsa.pub'
# id_rsa.pub should look like this (standard sshd pubkey format):# ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAw+J...F3w2mleybgT1w== user@HOSTNAME
# flavor_name = 't2.nano'# t2.nano only has 512 MB RAM, pip install will cause out of memory (OOM), install-aws.sh cloud-init script uses swap# to circumvent this issue, but t2.micro is also cheap and has 1 GB RAM which is sufficient for faafo exampleflavor_name = 't2.micro'
# default region# region_name = 'eu-central-1'# region_name = 'ap-south-1'
# AWS Academy Labs only allow us-east-1 and us-west-1 see our AWS Academy Lab Guide, https://awsacademy.instructure.com/login/region_name = 'us-east-1'# region_name = 'us-west-1'
# starting instances in AWS Academy takes significantly longer compared to paid AWS accounts, allow ~ >2 minutes timeouttimeout = 600
def main(): ########################################################################### # # get credentials # ###########################################################################
# see AWS Academy Lab for Account Details # read credentials from file config = configparser.ConfigParser() config.read_file(open(home + '/.aws/credentials')) aws_access_key_id = config['default']['aws_access_key_id'] aws_secret_access_key = config['default']['aws_secret_access_key'] aws_session_token = config['default']['aws_session_token']
# hard coded AWS credentials using vars # aws_access_key_id = "ASIAX..." # aws_secret_access_key = "WLxxXK+..." # aws_session_token = "FwoGZXIvYXdzEMb//////////wEaDE5rX.......0SleZ+L75I9iEri9LA4hovWul8HvexhCBK8.......................Ae/T+VkUbcQRtJEDwg+gYCABuk0JlSj5Wk7YA65r3BSNJXZFpkhbek6VBjvE/cEt5fKZEhENcdFxjAcAJLd6bOWi/oGXU5e3PX3mcXgm0oJpz6h3wqD1LvSDtw5GDwn0BHiF1Mu.......................cm/VukK5F"
########################################################################### # # create connection # ###########################################################################
provider = compute_get_driver(compute_Provider.EC2) conn = provider(key=aws_access_key_id, secret=aws_secret_access_key, token=aws_session_token, region=region_name)
########################################################################### # # get image, flavor, network for instance creation # ###########################################################################
# print("Search for AMI...") # image = conn.list_images(ex_filters={"name": ubuntu_image_name})[0] # print("Using image: %s" % image)
# print("Fetching images (AMI) list from AWS region. This will take a lot of seconds (AWS has a very long list of " # "supported operating systems and versions)... please be patient...") # image = '' # for img in images: # # if img.name == ubuntu_image_name: # if img.extra['owner_alias'] == 'amazon': # print(img) # if img.id == ubuntu_image_name: # image = img
# select image directly to save time, as retrieving the image list takes several minutes now, # need to change ami id here if updated or for other regions, id is working for course in # summer term 2022, in region: us-east-1 and pointing to ubuntu 18.04 used in the instance wizard, # to update AMI id use the create instance wizard and copy amd64 image id for ubuntu 18.04 in the # desired region #
print("Selecting AMI...") # us-east-1 examples as of 9.5.2022: # # Canonical, Ubuntu, 18.04 LTS, amd64 bionic image build on 2022-04-11 image_id = "ami-005de95e8ff495156" # # Canonical, Ubuntu, 20.04 LTS, amd64 focal image build on 2022-04-19 # image_id = "ami-0c4f7023847b90238" # # Canonical, Ubuntu, 22.04 LTS, amd64 jammy image build on 2022-04-20 # image_id = "ami-09d56f8956ab235b3" # image = conn.list_images(ex_image_ids=[image_id])[0] print("Using image: %s" % image)
flavors = conn.list_sizes() flavor = [s for s in flavors if s.id == flavor_name][0] print(flavor)
# 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']: if instance.state is not NodeState.TERMINATED: print('Destroying Instance: %s' % instance.name) conn.destroy_node(instance)
# wait until all nodes are destroyed to be able to remove dependent 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-worker-3', 'app-controller', 'app-services', 'app-api-1', 'app-api-2']: if instance.state is not NodeState.TERMINATED: nodes_still_running = True if nodes_still_running is True: print('There are still instances running, waiting for them to be destroyed...') else: print('No instances running')
# delete security groups, respecting dependencies (hence deleting 'control' and 'services' first) for group in conn.ex_list_security_groups(): if group in ['control', 'services']: print('Deleting security group: %s' % group) conn.ex_delete_security_group(group)
# now we can delete security groups 'api' and 'worker', as 'control' and 'api' depended on them, otherwise AWS will # throw DependencyViolation: resource has a dependent object for group in conn.ex_list_security_groups(): if group in ['api', 'worker']: print('Deleting security group: %s' % group) 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 == security_group_name: print('Security Group ' + security_group_name + ' already exists. Skipping creation.') return security_grp['group_id'] return False
if not get_security_group(conn, "api"): api_security_group_result = conn.ex_create_security_group('api', 'for API services only') api_security_group_id = api_security_group_result['group_id'] conn.ex_authorize_security_group_ingress(api_security_group_id, 22, 22, cidr_ips=['0.0.0.0/0'], protocol='tcp') conn.ex_authorize_security_group_ingress(api_security_group_id, 80, 80, cidr_ips=['0.0.0.0/0'], protocol='tcp') else: api_security_group_id = get_security_group(conn, "api")
if not get_security_group(conn, "worker"): worker_security_group_result = conn.ex_create_security_group('worker', 'for services that run on a worker node') worker_security_group_id = worker_security_group_result['group_id'] conn.ex_authorize_security_group_ingress(worker_security_group_id, 22, 22, cidr_ips=['0.0.0.0/0'], protocol='tcp') else: worker_security_group_id = get_security_group(conn, "worker")
if not get_security_group(conn, "control"): controller_security_group_result = conn.ex_create_security_group('control', 'for services that run on a control node') controller_security_group_id = controller_security_group_result['group_id'] conn.ex_authorize_security_group_ingress(controller_security_group_id, 22, 22, cidr_ips=['0.0.0.0/0'], protocol='tcp') conn.ex_authorize_security_group_ingress(controller_security_group_id, 80, 80, cidr_ips=['0.0.0.0/0'], protocol='tcp') conn.ex_authorize_security_group_ingress(controller_security_group_id, 5672, 5672, group_pairs=[{'group_id': worker_security_group_id}], protocol='tcp') else: controller_security_group_id = get_security_group(conn, "control")
if not get_security_group(conn, "services"): services_security_group_result = conn.ex_create_security_group('services', 'for DB and AMQP services only') services_security_group_id = services_security_group_result['group_id'] conn.ex_authorize_security_group_ingress(services_security_group_id, 22, 22, cidr_ips=['0.0.0.0/0'], protocol='tcp') # conn.ex_authorize_security_group_ingress(services_security_group_id, 3306, 3306, cidr_ips=['0.0.0.0/0'], # group_pairs=[{'group_id': api_security_group_id}], protocol='tcp') conn.ex_authorize_security_group_ingress(services_security_group_id, 3306, 3306, group_pairs=[{'group_id': api_security_group_id}], protocol='tcp') conn.ex_authorize_security_group_ingress(services_security_group_id, 5672, 5672, group_pairs=[{'group_id': worker_security_group_id}], protocol='tcp') conn.ex_authorize_security_group_ingress(services_security_group_id, 5672, 5672, group_pairs=[{'group_id': api_security_group_id}], protocol='tcp') else: services_security_group_id = get_security_group(conn, "services")
for security_group in conn.ex_list_security_groups(): print(security_group)
# get availability zones az = conn.list_locations() print(az)
########################################################################### # # create app-services instance (database & messaging) (Amazon AWS EC2) # ###########################################################################
# https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh # is currently broken, hence the "rabbitctl" lines were added in the example # below, see also https://bugs.launchpad.net/faafo/+bug/1679710 # # Thanks to Stefan Friedmann for finding this fix ;)
userdata_service = '''#!/usr/bin/env bash
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 rabbitmqctl add_user faafo guest rabbitmqctl set_user_tags faafo administrator rabbitmqctl set_permissions -p / faafo ".*" ".*" ".*" '''
print('Starting new app-services instance and wait until it is running...') instance_services = conn.create_node(location=az[0], name='app-services', image=image, size=flavor, ex_keyname=keypair_name, ex_userdata=userdata_service, ex_security_groups=["services"]) instance_services = conn.wait_until_running(nodes=[instance_services], timeout=timeout, ssh_interface='public_ips') services_ip = instance_services[0][0].private_ips[0] print(instance_services)
########################################################################### # # create app-api instances (Amazon AWS EC2) # ###########################################################################
userdata_api = '''#!/usr/bin/env bash
curl -L -s https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/master/faafo/contrib/install.sh | bash -s -- \ -i faafo -r api -m 'amqp://faafo:guest@%(services_ip)s:5672/' \ -d 'mysql+pymysql://faafo:password@%(services_ip)s:3306/faafo' ''' % {'services_ip': services_ip}
print('Starting new app-api-1 instance and wait until it is running...') instance_api_1 = conn.create_node(location=az[0], name='app-api-1', image=image, size=flavor, ex_keyname=keypair_name, ex_userdata=userdata_api, ex_security_groups=["api"])
print('Starting new app-api-2 instance and wait until it is running...') instance_api_2 = conn.create_node(location=az[1], name='app-api-2', image=image, size=flavor, ex_keyname=keypair_name, ex_userdata=userdata_api, ex_security_groups=["api"])
instance_api_1 = conn.wait_until_running(nodes=[instance_api_1], timeout=timeout, ssh_interface='public_ips') api_1_ip = instance_api_1[0][0].private_ips[0] print("app-api-1 public ip: " + instance_api_1[0][1][0]) instance_api_2 = conn.wait_until_running(nodes=[instance_api_2], timeout=timeout, ssh_interface='public_ips') # currently only api_1_ip is used api_2_ip = instance_api_2[0][0].private_ips[0] print("app-api-2 public ip: " + instance_api_2[0][1][0])
########################################################################### # # create worker instances (Amazon AWS EC2) # ###########################################################################
userdata_worker = '''#!/usr/bin/env bash
curl -L -s https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/master/faafo/contrib/install.sh | bash -s -- \ -i faafo -r worker -e 'http://%(api_1_ip)s' -m 'amqp://faafo:guest@%(services_ip)s:5672/' ''' % {'api_1_ip': api_1_ip, 'services_ip': services_ip}
# userdata_api-api-2 = '''#!/usr/bin/env bash # curl -L -s https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/master/faafo/contrib/install.sh | 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(location=az[0], name='app-worker-1', image=image, size=flavor, ex_keyname=keypair_name, ex_userdata=userdata_worker, ex_security_groups=["worker"])
print('Starting new app-worker-2 instance and wait until it is running...') instance_worker_2 = conn.create_node(location=az[1], name='app-worker-2', image=image, size=flavor, ex_keyname=keypair_name, ex_userdata=userdata_worker, ex_security_groups=["worker"])
# 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)
########################################################################### # # create load balancer (Amazon AWS ELB) # ###########################################################################
elb_provider = loadbalancer_get_driver(loadbalancer_Provider.ELB) elb_conn = elb_provider(aws_access_key_id, aws_secret_access_key, token=aws_session_token, region=region_name)
print("Deleting previously created load balancers in: " + str(elb_conn.list_balancers())) for loadbalancer in elb_conn.list_balancers(): if loadbalancer.name == "lb1": print("Deleting Load Balancer: " + str(loadbalancer)) elb_conn.destroy_balancer(loadbalancer)
# get suffix (a, b, c, ...) from all availability zones, available in the selected region all_availability_zones_in_region = [] for az in conn.ex_list_availability_zones(): all_availability_zones_in_region.append(az.name[-1])
# create new load balancer # example uses "classic" ELB with default HTTP health. monitor, you can see the result in the EC2 console, after # running this script new_load_balancer = elb_conn.create_balancer( name='lb1', algorithm=Algorithm.ROUND_ROBIN, port=80, protocol='http', members=[], ex_members_availability_zones=all_availability_zones_in_region)
# attach api instances as members to load balancer elb_conn.balancer_attach_compute_node(balancer=new_load_balancer, node=instance_api_1[0][0]) elb_conn.balancer_attach_compute_node(balancer=new_load_balancer, node=instance_api_2[0][0])
print("Created load balancer: " + str(new_load_balancer))
# wait for the load balancer to be ready while new_load_balancer.state != 2: time.sleep(3) new_load_balancer = elb_conn.get_balancer(new_load_balancer.id)
print("\n\nYou can see the instances created in EC2 in AWS Console. You'll also find the load balancer under ELB " "there.\n" " You can access the faafo application deployed to the loadbalancer at: http://" + new_load_balancer.ip + " as soon as instances are detected to be deployed and healthy by the load balancer.")
if __name__ == '__main__': main()
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