Challenges of Migrating Legacy
Applications to AWS
Managers who are tempted to feel elated at the prospect of having access to all the data they could ever wish for, soon realize it is a data sword of Damocles* hanging by a thread, ready to snap and bury them if they can’t find a way to unlock its value.
* The parable of the sword of Damocles teaches us that no matter how good someone’s life may appear, it’s difficult to be happy living under existential threat.
So, what's the solution?
The answer lies in application, information, and data migration. By migrating to the cloud, organizations can improve their operational efficiency, reduce IT costs, improve performance, and take their business to the next level. Modern technology solutions can introduce automation to manual processes, which are prone to errors, and enhance reporting and rich featured UI and rules engine, allowing businesses to manage data more efficiently, and changes will be reflected in real-time.
The ultimate objective
However, migrating from legacy mainframes to modern technology solutions is not without its challenges.
- Rewriting application architecture for the cloud
- Complexity of the integration of data, systems, and processes
- Compliance and security
- Dealing with hybrid networking setups
- Investing in people and tools needed to migrate successfully
- Training users on the new systems
- Create a reference architecture for the legacy application to migrate to a cloud-native architecture on AWS.
- Compliance & Security, Hybrid connectivity – AWS Accounts/VPCs, including TGW, Direct Connect Gateway, multi region peering, Landing Zones, VPCs AZs Subnets, Security Groups, IAM role
- Data Security – Encrypted at Rest (AWS KMS), Encrypted at transit (SSL/TLS)
- Real Time Transactions and Streaming, Messaging Integrations– SNS, SQS, MSK, Kinesis
- Adapters – On-Prem to cloud protocol bridge
- Use Serverless components/services as much as possible – Lambda, StepFunctions for workflow
- AWS API Gateway – Lambda functions are invoked through API Gateway
- Computation – Application container in EKS
- ALB – EKS pods are invoked using ALB
- AWS Secret Manager – Store credentials securely
In conclusion, the migration from legacy mainframes to modern technology solutions, such as AWS, is no longer an option but a necessity for businesses that want to remain competitive and agile. While the migration process may seem daunting, it can be successfully achieved with careful planning and execution, along with adherence to guiding principles. By leveraging AWS’s cloud-native architecture and services, organizations can improve operational efficiency, reduce costs, and enhance their overall competitiveness. With the right strategy and tools, the migration journey can result in a more robust and scalable information technology platform that meets current and future business needs.