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cloud-computing-msc-ai-exam.../demo4-scale-out.py

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import getpass
import os
import libcloud.security
import time
from libcloud.compute.providers import get_driver
from libcloud.compute.types import Provider
# reqs:
# services: nova, glance, neutron
# resources: 2 instances (m1.small), 2 floating ips (1 keypair, 2 security groups)
# HS-Fulda Private Cloud
auth_url = 'https://192.168.72.40:5000'
region_name = 'RegionOne'
domain_name = "hsfulda"
ubuntu_image_name = "Ubuntu 14.04 - Trusty Tahr - 64-bit - Cloud Based Image"
flavor_name = 'm1.small'
network_name = "ai-netlab-pro-net"
keypair_name = 'srieger-pub'
pub_key_file = '~/.ssh/id_rsa.pub'
def main():
###########################################################################
#
# get credentials
#
###########################################################################
if "OS_PROJECT_NAME" in os.environ:
project_name = os.environ["OS_PROJECT_NAME"]
else:
project_name = input("Enter your OpenStack project:")
if "OS_USERNAME" in os.environ:
auth_username = os.environ["OS_USERNAME"]
else:
auth_username = input("Enter your OpenStack username:")
if "OS_PASSWORD" in os.environ:
auth_password = os.environ["OS_PASSWORD"]
else:
auth_password = getpass.getpass("Enter your OpenStack password:")
###########################################################################
#
# create connection
#
###########################################################################
libcloud.security.VERIFY_SSL_CERT = False
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 == network_name:
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('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']:
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('Deleting security group: %s' % 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 = '''#!/usr/bin/env bash
curl -L -s https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh | bash -s -- \
-i database -i messaging
'''
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,
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 = '''#!/usr/bin/env bash
curl -L -s https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh | bash -s -- \
-i faafo -r api -m 'amqp://guest: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,
networks=[network],
ex_keyname=keypair_name,
ex_userdata=userdata,
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,
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_api_1 = '''#!/usr/bin/env bash
curl -L -s https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh | bash -s -- \
-i faafo -r worker -e 'http://%(api_1_ip)s' -m 'amqp://guest:guest@%(services_ip)s:5672/'
''' % {'api_1_ip': api_1_ip, 'services_ip': services_ip}
# userdata-api-2 = '''#!/usr/bin/env bash
# curl -L -s https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh | bash -s -- \
# -i faafo -r worker -e 'http://%(api_2_ip)s' -m 'amqp://guest: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_api_1,
ex_security_groups=[worker_security_group])
print('Starting new app-worker-1 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_api_1,
ex_security_groups=[worker_security_group])
print('Starting new app-worker-1 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_api_1,
ex_security_groups=[worker_security_group])
print(instance_worker_1)
print(instance_worker_2)
print(instance_worker_3)
if __name__ == '__main__':
main()