Python example

[airmonitor]

Hey.

Do you know maybe any python example when using cdk pipelines?
I'm asking because I have already a stack named front-end-stack.
Inside this stack I'm creating a couple of resources.

class FrontEndStack(cdk.Stack):
    """Create Front-End stack.

    Including:
        * storage - s3
        * cloudfront distribution
    """

    def __init__(self, scope: Construct, construct_id: str, env, props, **kwargs) -> None:
        """

        :param scope: The AWS CDK parent class from which this class inherits
        :param construct_id: Tne name of CDK construct
        :param env: Tha AWS CDK Environment class which provide AWS Account ID and AWS Region.
        :param props: The dictionary which contain configuration values loaded initially from /config/config-env.yaml
        :param kwargs:
        """

        super().__init__(scope, construct_id, env=env, **kwargs)
        self.object_names = ObjectNames(self, id="object_names", props=props, env=env).output_props
        self.imported_kms_key = kms.Key.from_lookup(
            self, id="imported_kms_key", alias_name=f'alias/{self.object_names["shared_kms_key_alias"]}'
        )
        self.imported_rds_secret = secretsmanager.Secret.from_secret_name_v2(
            self, id="imported_secret", secret_name=self.object_names["rds_credentials_secret_name"]
        )
        self.imported_target_s3_bucket = s3.Bucket.from_bucket_name(
            self, id="target-s3-bucket", bucket_name=self.object_names["target_s3_bucket"]
        )

        s3_bucket_server_access_logs = s3.Bucket.from_bucket_name(
            self, id="imported_server_access_logs_bucket", bucket_name=self.object_names["shared_s3_access_logs_bucket"]
        )
        s3_bucket_construct = S3Bucket(self, id="bucket")

        self.api_gw = self.api_gateway(
            stage=props["stage"],
            aws_lambda_list=api_gw_lambdas,
            allowed_methods=["OPTIONS,POST,PUT,GET"],
            props=props,
        )

The above is a subset...

Anyway.

Then I'm crating monitoring class

class FrontEndMonitoringStack(FrontEndStack):
    """

    """

    def __init__(self, parent, name, env, props):
        super().__init__(parent, name, env, props)

        monitoring = cdk_monitoring.MonitoringFacade(self, "Monitoring")
        monitoring.add_large_header("FrontEnd").monitor_api_gateway(api=self.api_gw)

and inside CDK STAGE

class FrontEndStage(cdk.Stage):
    """Creates multiple cloudformation stacks related to front-end services."""

    def __init__(self, scope: Construct, construct_id: str, env: cdk.Environment, props: dict, **kwargs) -> None:
        """

        :param scope: The AWS CDK parent class from which this class inherits
        :param construct_id: Tne name of CDK construct
        :param env: Tha AWS CDK Environment class which provide AWS Account ID and AWS Region.
        :param props: The dictionary which contain configuration values loaded initially from /config/config-env.yaml
        :param kwargs:
        """
        super().__init__(scope, construct_id, env=env, **kwargs)

        # front_end_stack =

        FrontEndMonitoringStack(
            parent=FrontEndStack(self, construct_id="front-end-stack", env=env, props=props),
            name="front-end-monitoring-stack",
            env=env,
            props=props
        )

for now looks simple:

• 2 stacks
• 1 CI/CD stage

The issue what I see now is that the FrontEndMonitoringStack want's to create all resources defined inside FrontEndStack.

I was thinking that FrontEndMonitoringStack will use resources definition from the FrontEndStack to create CW dashbard, metrics, alarms, subscriptions etc, but apparently I was mistaken.

So my question is how I can use properly your great work to create monitoring resources without duplicating already running services deployed in AWS from the FrontEndStack.
I would like to avoid situation when I have doubled resources in FrontEndStack and FrontEndMonitoringStack.

Regards
Tom

[ayush987goyal]

The parent to both the stacks (FrontEnd and FrontEndMonitoring) should be the scope of the stage (i.e. the cdk App). You can pass the FrontEnd stack as a prop to the FrontEndMonitoring stack instead of the parent.

[airmonitor]

Many thanks

[DesAWSume]

So what is solution in code? very keen to know for someone who don't use nested stack in CDK

[TomaszSzusterTR]

Hey @DesAWSume

Pls see an example there

https://github.com/airmonitor/cdk-opinionated-constructs/blob/main/test/app.py

and stack example here
https://github.com/airmonitor/cdk-opinionated-constructs#aws-lambda-monitoring-example

[DesAWSume]

Thanks so much @TomaszSzusterTR
I made another Q&A post for resource that doesn't have the natively add alarm method on the discussion thread