1. Log in to the AWS Management Console.
2. Navigate to the CloudFormation service.
3. Click on the stack that has drift detection enabled.
4. Click on the “Drift” tab.
5. Review the drift detection results to identify the resources that have drifted.
6. Click on the “Resources” tab to see the current state of the resources.
7. Select the resources that have drifted and click on the “Detect Drift” button.
8. Wait for the drift detection process to complete.
9. Review the drift detection results to confirm that the resources have been remediated.
10. If necessary, make changes to the stack to remediate the drift.
11. Update the stack to apply the changes.
12. Repeat the drift detection process to confirm that the resources are no longer drifting.

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1. Identify the stack that has drifted by running the following command:

aws cloudformation detect-stack-drift --stack-name <stack-name>

2. Once you have identified the resources that have drifted, you can generate a drift report by running the following command:

aws cloudformation describe-stack-resource-drifts --stack-name <stack-name>

3. Review the drift report to identify the resources that have drifted and the expected and actual configurations.
4. To remediate the drift, update the stack with the expected configuration by running the following command:

aws cloudformation update-stack --stack-name <stack-name> --template-body file://<path-to-template> --parameters file://<path-to-parameters>

5. Wait for the stack update to complete by running the following command:

aws cloudformation wait stack-update-complete --stack-name <stack-name>

6. Verify that the stack has been remediated by running the following command:

aws cloudformation describe-stack-resources --stack-name <stack-name>

1. Import the required libraries: boto3, json

import boto3
import json

2. Create a boto3 client for AWS CloudFormation:

client = boto3.client('cloudformation')

3. Get the list of stacks:

stacks = client.list_stacks(StackStatusFilter=['CREATE_COMPLETE', 'UPDATE_COMPLETE'])['StackSummaries']

4. Loop through the stacks and check for drift:

for stack in stacks:
    stack_drift = client.detect_stack_drift(StackName=stack['StackName'])
    if stack_drift['StackDriftStatus'] == 'DRIFTED':
        print('Stack {} has drifted'.format(stack['StackName']))

5. If a stack has drifted, remediate it by updating the stack:

response = client.update_stack(StackName=stack['StackName'], UsePreviousTemplate=True)
print('Stack {} has been remediated'.format(stack['StackName']))