Clean Up Resources

Overview

This section guides you through cleaning up all AWS resources created during this workshop to avoid ongoing charges. Follow the steps in order as some resources depend on others.

Estimated Time: ~30 minutes

Step 1: Delete CI/CD Pipeline Resources

First, delete the CI/CD pipeline to stop any automated deployments.

1. Navigate to AWS CodePipeline console
2. Select your pipeline (e.g., ielts-pipeline)
3. Click Delete pipeline → Confirm deletion
4. Navigate to AWS CodeBuild console
5. Delete all build projects associated with the workshop
6. Delete any S3 buckets used for pipeline artifacts

Step 2: Delete ECS Services and Cluster

Stop and delete all ECS services before deleting the cluster.

1. Navigate to Amazon ECS console
2. Select your cluster (e.g., ielts-cluster)
3. Go to Services tab
4. For each service:
   • Select the service
   • Click Update → Set Desired tasks to 0 → Update
   • Wait for running tasks to stop
   • Click Delete service → Confirm
5. After all services are deleted, go back to Clusters
6. Select your cluster → Delete cluster → Confirm

Step 3: Delete ECR Repositories

Delete container images and repositories.

1. Navigate to Amazon ECR console
2. Select each repository:
   • ielts-frontend
   • ielts-backend
3. Click Delete → Type the repository name to confirm

Step 4: Delete AI Service Resources

Delete serverless AI components in this order:

4.1 Delete Lambda Functions

1. Navigate to AWS Lambda console
2. Delete each function:
   • writing-evaluator
   • speaking-evaluator
   • flashcard-generator
   • evaluation-status
   • s3-upload
3. Select function → Actions → Delete → Confirm

4.2 Delete API Gateway

1. Navigate to Amazon API Gateway console
2. Select your API (e.g., ielts-ai-api)
3. Click Actions → Delete API → Confirm

4.3 Delete SQS Queues

1. Navigate to Amazon SQS console
2. Delete each queue:
   • writing-evaluation-queue
   • writing-evaluation-dlq
   • speaking-evaluation-queue
   • speaking-evaluation-dlq
   • flashcard-generation-queue
   • flashcard-generation-dlq
3. Select queue → Delete → Confirm

4.4 Delete DynamoDB Tables

1. Navigate to Amazon DynamoDB console
2. Delete each table:
   • evaluations
   • flashcard-sets
3. Select table → Delete → Confirm deletion

Step 5: Delete Load Balancer Resources

1. Navigate to EC2 console → Load Balancers
2. Select your ALB (e.g., ielts-alb)
3. Click Actions → Delete → Confirm
4. Go to Target Groups
5. Delete all target groups associated with the workshop
6. Go to Listeners and delete any remaining listeners

Step 6: Delete Database Resources

6.1 Delete RDS Instance

1. Navigate to Amazon RDS console
2. Select your database instance
3. Click Actions → Delete
4. Uncheck Create final snapshot (if not needed)
5. Check I acknowledge… → Delete

6.2 Delete ElastiCache (Redis)

1. Navigate to Amazon ElastiCache console
2. Select your Redis cluster
3. Click Delete → Confirm

6.3 Delete RDS Subnet Group

1. In RDS console, go to Subnet groups
2. Select your subnet group → Delete

Step 7: Delete S3 Buckets

1. Navigate to Amazon S3 console
2. For each bucket created in the workshop:
   • ielts-audio-bucket
   • ielts-documents-bucket
   • Any pipeline artifact buckets
3. Select bucket → Empty → Confirm
4. After emptying, select bucket → Delete → Confirm

Step 8: Delete Secrets Manager Secrets

1. Navigate to AWS Secrets Manager console
2. Select each secret created for the workshop
3. Click Actions → Delete secret
4. Set recovery window to 7 days (minimum) or choose immediate deletion
5. Confirm deletion

Step 9: Delete CloudWatch Resources

1. Navigate to Amazon CloudWatch console
2. Go to Log groups
3. Delete log groups:
   • /aws/lambda/writing-evaluator
   • /aws/lambda/speaking-evaluator
   • /aws/lambda/flashcard-generator
   • /ecs/ielts-frontend
   • /ecs/ielts-backend
4. Go to Alarms and delete any created alarms

Step 10: Delete VPC and Network Resources

Delete network resources in this specific order:

10.1 Delete NAT Gateway

1. Navigate to VPC console → NAT Gateways
2. Select your NAT Gateway
3. Click Actions → Delete NAT gateway → Confirm
4. Wait for status to change to Deleted

10.2 Release Elastic IPs

1. Go to Elastic IPs
2. Select any Elastic IPs associated with NAT Gateway
3. Click Actions → Release Elastic IP addresses → Confirm

10.3 Delete VPC Endpoints

1. Go to Endpoints
2. Select all VPC endpoints created for the workshop
3. Click Actions → Delete VPC endpoints → Confirm

10.4 Delete Security Groups

1. Go to Security Groups
2. Delete security groups in this order (due to dependencies):
   • Application security groups first
   • Database security groups
   • Load balancer security groups
   • Do not delete the default security group

10.5 Delete Subnets

1. Go to Subnets
2. Select all subnets in your workshop VPC
3. Click Actions → Delete subnet → Confirm

10.6 Delete Route Tables

1. Go to Route Tables
2. Delete custom route tables (not the main route table)
3. Select route table → Actions → Delete route table

10.7 Delete Internet Gateway

1. Go to Internet Gateways
2. Select your IGW → Actions → Detach from VPC → Confirm
3. Select IGW again → Actions → Delete internet gateway → Confirm

10.8 Delete VPC

1. Go to Your VPCs
2. Select your workshop VPC
3. Click Actions → Delete VPC → Confirm

Step 11: Delete IAM Resources

1. Navigate to IAM console
2. Go to Roles and delete:
   • ecsTaskExecutionRole (if created for this workshop)
   • ielts-lambda-execution-role
   • Any other workshop-specific roles
3. Go to Policies and delete custom policies created for the workshop

Verification Checklist

After completing the cleanup, verify all resources are deleted:

Cost Verification

To ensure no unexpected charges:

1. Go to AWS Billing console
2. Check Bills for the current month
3. Review Cost Explorer to verify no active resources
4. Set up a Budget alert if you plan to continue using AWS