Update examples to 0.29.0 (aws-samples#35)

- Automatically test Python examples
- Remove chat-app examples

Author: rix0rrr

.gitignore

@@ -6,3 +6,4 @@ package-lock.json
 __pycache__
 .env
 *~
+.cdk.staging

README.md

@@ -21,7 +21,6 @@ $ cdk destroy
 | Example | Description |
 |---------|-------------|
 | [application-load-balancer](https://github.com/aws-samples/aws-cdk-examples/tree/master/typescript/application-load-balancer/) | Using an AutoScalingGroup with an Application Load Balancer |
-| [chat-app](https://github.com/aws-samples/aws-cdk-examples/tree/master/typescript/chat-app/) | A serverless chat application using Cognito |
 | [classic-load-balancer](https://github.com/aws-samples/aws-cdk-examples/tree/master/typescript/classic-load-balancer/) | Using an AutoScalingGroup with a Classic Load Balancer |
 | [custom-resource](https://github.com/aws-samples/aws-cdk-examples/tree/master/typescript/custom-resource/) | Shows adding a Custom Resource to your CDK app |
 | [elasticbeanstalk](https://github.com/aws-samples/aws-cdk-examples/tree/master/typescript/elasticbeanstalk/) | Elastic Beanstalk example using L1 with a Blue/Green pipeline (community contributed) |
@@ -57,6 +56,35 @@ $ cdk destroy
 |---------|-------------|
 | [hello-world](https://github.com/aws-samples/aws-cdk-examples/tree/master/java/hello-world/) | A demo application that uses the CDK in Java |
 
+## Python examples
+
+To run a Python example, say my-widget-service:
+
+```
+$ npm install -g aws-cdk
+$ cd python/my-widget-service
+$ pip install -r requirements.txt    # Best to do this in a virtualenv
+$ cdk deploy                         # Deploys the CloudFormation template
+
+# Afterwards
+$ cdk destroy
+```
+
+| Example | Description |
+|---------|-------------|
+| [application-load-balancer](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/application-load-balancer/) | Using an AutoScalingGroup with an Application Load Balancer |
+| [classic-load-balancer](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/classic-load-balancer/) | Using an AutoScalingGroup with a Classic Load Balancer |
+| [custom-resource](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/custom-resource/) | Shows adding a Custom Resource to your CDK app |
+| [ecs-cluster](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/cluster/) | Provision an ECS Cluster with custom Autoscaling Group configuration |
+| [ecs-load-balanced-service](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/ecs-load-balanced-service/) | Starting a container fronted by a load balancer on ECS |
+| [ecs-service-with-task-placement](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/ecs-service-with-task-placement/) | Starting a container ECS with task placement specifications |
+| [ecs-service-with-advanced-alb-config](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/ecs-service-with-advanced-alb-config/) | Starting a container fronted by a load balancer on ECS with added load balancer configuration |
+| [ecs-service-with-task-networking](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/ecs-service-with-task-networking/) | Starting an ECS service with task networking, allowing ingress traffic to the task but blocking for the instance |
+| [fargate-load-balanced-service](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/fargate-load-balanced-service/) | Starting a container fronted by a load balancer on Fargate |
+| [fargate-service-with-auto-scaling](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/ecs/fargate-service-with-auto-scaling/) | Starting an ECS service of FARGATE launch type that auto scales based on average CPU Utilization |
+| [lambda-cron](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/lambda-cron/) | Running a Lambda on a schedule |
+| [stepfunctions-job-poller](https://github.com/aws-samples/aws-cdk-examples/tree/master/python/stepfunctions-job-poller/) | A simple StepFunctions workflow |
+
 ## JavaScript examples
 
 Select the following link to see how to install and run the example.

python/chat-app/app.py

@@ -23,15 +23,16 @@ def __init__(self, scope: cdk.Construct, id: str, **kwargs) -> None:
             associate_public_ip_address=True,
             update_type=autoscaling.UpdateType.ReplacingUpdate,
             desired_capacity=3,
-            vpc=vpc
+            vpc=vpc,
+            vpc_subnets={'subnetType': ec2.SubnetType.Public}
         )
 
         cluster = ecs.Cluster(
             self, 'EcsCluster',
             vpc=vpc
         )
 
-        cluster.add_autoscaling_group(asg)
+        cluster.add_auto_scaling_group(asg)
         cluster.add_capacity("DefaultAutoScalingGroup",
                              instance_type=ec2.InstanceType("t2.micro"))
 

python/chat-app/cdk.json

@@ -1,4 +1,4 @@
-from aws_cdk import aws_events as events, aws_lambda as lambda_, cdk
+from aws_cdk import aws_events as events, aws_lambda as lambda_, cdk, aws_events_targets as targets
 
 
 class LambdaCronStack(cdk.Stack):
@@ -22,7 +22,7 @@ def __init__(self, app: cdk.App, id: str) -> None:
         rule = events.EventRule(
             self, "Rule", schedule_expression="cron(0 18 ? * MON-FRI *)"
         )
-        rule.add_target(lambdaFn)
+        rule.add_target(targets.LambdaFunction(lambdaFn))
 
 
 app = cdk.App()