Merge pull request #160 from CloudBytes-Academy/article

ART: update CDK app

content/aws/50005000-cdk-new-app.md → content/aws/50001000-cdk-new-app.md

@@ -3,7 +3,7 @@ Date: 2023-10-22
 Category: AWS Academy
 Series: AWS CDK
 series_index: 4
-Tags: aws, cdk
+Tags: aws, cdk, python
 Author: Rehan Haider
 Summary: How to create a new CDK app that uses Python as the programming language
 Keywords: AWS

content/aws/50002000-cdk-update-app.md

@@ -0,0 +1,55 @@
+Title: Update an existing CDK app
+Date: 2023-10-22
+Category: AWS Academy
+Series: AWS CDK
+series_index: 5
+Tags: aws, cdk, python
+Author: Rehan Haider
+Summary: How to update an existing CDK app 
+Keywords: AWS
+
+
+In this post, we'll update an existing CDK app that uses Python as the programming language.
+
+If you haven't created a new CDK app yet, follow the steps in [Creating a new CDK app with Python]({filename}50001000-cdk-new-app.md).
+
+!!! note
+    Ensure that [AWS CDK is installed & configured]({filename}00000100-cdk-installing-cdk-sam-cli.md) before proceeding.
+
+## Updating an existing CDK app
+
+We can simply update the stack bby modifying the `cdk_app/cdk_app_stack.py` file.
+
+For example, we can change the retention policy by modifying the `cdk_app/cdk_app_stack.py` file as follows:
+
+```python
+
+from aws_cdk import (
+    Stack,
+    aws_s3 as s3,
+    RemovalPolicy, # New Import
+)
+
+from constructs import Construct
+
+class CdkAppStack(Stack):
+
+    BUCKET_NAME = "MyFirstBucket"
+
+    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
+        super().__init__(scope, construct_id, **kwargs)
+
+        # Updated code. This will delete the bucket when the stack is deleted
+        s3.Bucket(self, "MyFirstBucket", removal_policy=RemovalPolicy.DESTROY)
+```
+
+Check the changes by running `cdk diff`. As you can see below, there is a change in Bucket policy being implemented.
+
+![CDK diff]({static}/images/aws-academy/50002000-cdk-cdk-diff-changes.png)
+
+
+Now run `cdk deploy` to deploy the changes. When you destroy the stack by running `cdk destroy`, you'll notice that the bucket is deleted as well.
+
+
+
+

content/aws/87500000-cdk-api-gateway-route53.md

@@ -1,7 +1,6 @@
 Title: CDK API Gateway with Custom Domain
 Date: 2022-10-24
 Category: AWS Academy
-Series: AWS CDK
 Tags: aws, cdk, python
 Author: Rehan Haider
 Summary: Create API Gateway and connect it with a custom domain / subdomain using Route53