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# import getpass# import os# 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
# reqs:# services: EC2 (nova, glance, neutron)# resources: 2 instances, 2 elastic ips (1 keypair, 2 security groups)
# The image to look for and use for the started instance# ubuntu_image_name = 'ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-20200408'ubuntu_image_id = "ami-085925f297f89fce1" # local ami id for resent ubuntu 18.04 20200408 in us-west-1
# 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@HOSTNAME
keypair_name = 'srieger-pub'pub_key_file = '~/.ssh/id_rsa.pub'
flavor_name = 't2.nano'
# default region# region_name = 'eu-central-1'# region_name = 'ap-south-1'
# AWS Educate only allows us-east-1 see our AWS classroom at https://www.awseducate.com# e.g., https://www.awseducate.com/student/s/launch-classroom?classroomId=a1v3m000005mNm6AAE
region_name = 'us-east-1'
def main(): ########################################################################### # # get credentials # ###########################################################################
# see AWS Educate classroom, Account Details
# access_id = getpass.win_getpass("Enter your access_id:") # secret_key = getpass.win_getpass("Enter your secret_key:") # session_token = getpass.win_getpass("Enter your session_token:") # access_id = "ASIAU..." # secret_key = "7lafW..." # session_token = "IQoJb3JpZ...EMb//..." access_id = "ASIA..." secret_key = "76lAj..." session_token = "IQoJ..."
########################################################################### # # create connection # ###########################################################################
provider = compute_get_driver(compute_Provider.EC2) conn = provider(key=access_id, secret=secret_key, token=session_token, region=region_name)
########################################################################### # # get image, flavor, network for instance creation # ###########################################################################
# 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...") # images = conn.list_images() # fetch/select the image referenced with ubuntu_image_name above # image = [i for i in images if i.name == ubuntu_image_name][0] # print(image)
# selecting the image based on defined AMI id image = NodeImage(id=ubuntu_image_id, name=None, driver=conn)
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 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', 'app-services']: if instance.state is not NodeState.TERMINATED: nodes_still_running = True print('There are still instances running, waiting for them to be destroyed...')
# 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, 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)
########################################################################### # # 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(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=120, ssh_interface='public_ips') services_ip = instance_services[0][0].private_ips[0]
########################################################################### # # 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(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(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=120, ssh_interface='public_ips') api_1_ip = instance_api_1[0][0].private_ips[0] instance_api_2 = conn.wait_until_running(nodes=[instance_api_2], timeout=120, ssh_interface='public_ips') api_2_ip = instance_api_2[0][0].private_ips[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(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(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(access_id, secret_key, token=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": 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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