changed AWS instance size to t2.micro, t2.nano is still possible using install-aws.sh cloud-init script, but really limited in RAM, added support for availability zones and spread instance across different az to improve fault tolerance, select AMI directly, remove 0.0.0.0/0 access to mysql

example-projects/demo4-scale-out-lb-in-aws-destroy.py

@@ -59,9 +59,10 @@ def main():
                             token=aws_session_token,
                             region=region_name)
 
-    print("Deleting previously created load balancers in: " + str(elb_conn.list_balancers()))
+    # print("List of load balancers: " + 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)
 
     ###########################################################################
@@ -101,7 +102,10 @@ def main():
             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...')
+        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
     for group in conn.ex_list_security_groups():

example-projects/demo4-scale-out-lb-in-aws.py

@@ -22,6 +22,7 @@ home = expanduser("~")
 
 # The image to look for and use for the started instance
 ubuntu_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
@@ -32,14 +33,16 @@ ubuntu_image_name = 'ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-2021
 keypair_name = 'srieger-pub'
 pub_key_file = home + '/.ssh/id_rsa.pub'
 
-flavor_name = 't2.nano'
+# flavor_name = 't2.nano'
+flavor_name = 't2.micro'
 
 # default region
 # region_name = 'eu-central-1'
 # region_name = 'ap-south-1'
 
-# AWS Academy Labs only allow us-east-1 see our AWS Academy Lab Guide, https://awsacademy.instructure.com/login/
+# 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 timeout
 timeout = 600
@@ -84,9 +87,9 @@ def main():
     #
     ###########################################################################
 
-    print("Search for AMI...")
+    # print("Search for AMI...")
-    image = conn.list_images(ex_filters={"name": ubuntu_image_name})[0]
+    # image = conn.list_images(ex_filters={"name": ubuntu_image_name})[0]
-    print("Using image: %s" % image)
+    # 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...")
@@ -98,18 +101,27 @@ def main():
     #   if img.id == ubuntu_image_name:
     #       image = img
 
-    # 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)
-
     # 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
-    # image = NodeImage(id="ami-0e472ba40eb589f49",
+    #
-    #                   name=ubuntu_image_name,
+
-    #                   driver="hvm")
+    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]
@@ -164,10 +176,14 @@ def main():
         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.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
-        print('There are still instances running, waiting for them to be destroyed...')
+        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():
@@ -233,7 +249,9 @@ def main():
         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'],
+        # 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')
@@ -245,6 +263,12 @@ def main():
     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)
@@ -258,7 +282,7 @@ def main():
     # 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-aws.sh | bash -s -- \
+    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
@@ -266,7 +290,8 @@ def main():
     '''
 
     print('Starting new app-services instance and wait until it is running...')
-    instance_services = conn.create_node(name='app-services',
+    instance_services = conn.create_node(location=az[0],
+                                         name='app-services',
                                          image=image,
                                          size=flavor,
                                          ex_keyname=keypair_name,
@@ -282,13 +307,14 @@ def main():
     ###########################################################################
 
     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-aws.sh | bash -s -- \
+    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',
+    instance_api_1 = conn.create_node(location=az[0],
+                                      name='app-api-1',
                                       image=image,
                                       size=flavor,
                                       ex_keyname=keypair_name,
@@ -296,7 +322,8 @@ def main():
                                       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',
+    instance_api_2 = conn.create_node(location=az[1],
+                                      name='app-api-2',
                                       image=image,
                                       size=flavor,
                                       ex_keyname=keypair_name,
@@ -305,8 +332,11 @@ def main():
 
     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]
+    print("app-api-1 public ip: " + instance_api_1[0][1][0])
     instance_api_2 = conn.wait_until_running(nodes=[instance_api_2], timeout=120, 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])
 
     ###########################################################################
     #
@@ -315,7 +345,7 @@ def main():
     ###########################################################################
 
     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-aws.sh | bash -s -- \
+    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}
 
@@ -325,14 +355,16 @@ def main():
     # ''' % {'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',
+    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(name='app-worker-2',
+    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,
@@ -367,6 +399,7 @@ def main():
     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