AWS webstack application instances.py

ec2_role = stack.add_resource(
    Role(
        'WebappInstanceRole',
        AssumeRolePolicyDocument=Policy(
            Statement=[Statement(
                Effect=Allow,
                Principal=Principal('Service', ['ec2.amazonaws.com']),
                Action=[AssumeRole]
            )]
        ),
        ManagedPolicyArns=['arn:aws:iam::aws:policy/service-role/AmazonEC2RoleforAWSCodeDeploy'],
        Path='/webapp/',
        RoleName='WebappRole'
    )
)

instance_profile = stack.add_resource(
    InstanceProfile(
        'WebappInstanceProfile',
        Path='/webapp/',
        Roles=[Ref(ec2_role)],
        InstanceProfileName='Webapp'
    )
)

launch_configuration = stack.add_resource(
    LaunchConfiguration(
        'LaunchConfiguration',
        AssociatePublicIpAddress=True,
        IamInstanceProfile=Ref(instance_profile),
        ImageId='ami-acd005d5',
        InstanceType='t2.nano',
        KeyName='test',
        SecurityGroups=[Ref(app_security_group)],
        UserData=userdata.from_file('./aws/userdata.sh')
    )
)

auto_scaling_group = stack.add_resource(AutoScalingGroup(
    'AutoscalingGroup',
    DesiredCapacity=2,
    HealthCheckType='ELB',
    HealthCheckGracePeriod=150,
    LaunchConfigurationName=Ref(launch_configuration),
    LoadBalancerNames=[Ref(elb)],
    MaxSize=4,
    MinSize=2,
    VPCZoneIdentifier=[Ref(public_subnet1), Ref(public_subnet2)]
))