How to Migrate On-Premises Applications to AWS

 

Introduction

Migrating on-premises applications to Amazon Web Services (AWS) helps businesses achieve greater scalability, flexibility, and cost-efficiency. However, a successful migration requires careful planning and execution. Below, we outline key steps and best practices to ensure a seamless transition to AWS.

Step 1: Assess Your Existing Infrastructure

Key Actions:

✔ Identify applications, databases, and workloads for migration.
✔ Evaluate dependencies and performance requirements.
✔ Use the AWS Pricing Calculator to analyze costs before migration.

Step 2: Choose the Right Migration Strategy

AWS 6 R’s Migration Strategies:

✔ Rehost (Lift and Shift): Move applications without modification.
✔Replatform (Lift, Tinker, and Shift): Make small adjustments to optimize performance in AWS.
✔ Repurchase: Transition to cloud-based solutions (e.g., SaaS).
✔ Refactor: Redesign applications to be cloud-native.
✔ Retire: Decommission unused applications.
✔ Retain: Keep certain applications on-premises as needed.

Step 3: Select the Right AWS Services

Recommended Services:

✔ Amazon EC2 - Scalable computing power.
✔ AWS Lambda - Serverless execution.
✔ Amazon RDS - Managed database services.
✔ Amazon S3 - Secure, scalable storage.
✔ AWS Application Migration Service - Automates migration.

Step 4: Plan and Execute Data Migration

Tools for Data Transfer:

✔ AWS Database Migration Service (DMS): Ensures minimal downtime.
✔ AWS Snowball & Snowmobile: Ideal for large-scale data transfers.
✔ AWS DataSync: Automates on-premises to AWS storage migration.

Step 5: Implement Security Best Practices

Security Measures:

✔ AWS IAM: Manage user permissions.
✔ AWS KMS: Encrypt data at rest and in transit.
✔ AWS CloudTrail & AWS Config: Ensure compliance and monitoring.

Step 6: Test and Validate Migration

Testing Approach:

✔ Conduct functional and performance testing.
✔ Validate security and compliance.
✔ Run workload simulations to identify potential issues.

Step 7: Optimize and Monitor Post-Migration

Optimization Strategies:

✔  Use AWS Cost Explorer for cost tracking.
✔  Enable Auto Scaling for resource efficiency.
✔  Leverage Amazon CloudWatch for real-time monitoring.

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