Cloud Migration Process Made
Simple: A Step-by-Step Framework
for Success

Migrating an organically grown system to the cloud requires a well-defined framework to ensure a smooth and successful transition. Here is a Cloud Migration Process, step-by-step framework that organizations can follow:

A Step-by-Step Cloud Migration Framework for Organically Grown Systems

Assess Current System

Begin by conducting a comprehensive assessment of the existing system. Understand its architecture, components, dependencies, and performance characteristics. Identify any limitations or challenges that might arise during the migration process. 

Define Objectives and Requirements

Clearly define the objectives and expected outcomes of the migration. Determine the specific requirements of the cloud environment, such as scalability, availability, security, and compliance. This will help guide the migration strategy and decision-making process. 

Choose the Right Cloud Model

Evaluate different cloud models (public, private, hybrid) and choose the one that best suits the organization’s needs. Consider factors such as data sensitivity, compliance requirements, cost, and scalability. Select a cloud service provider that aligns with the chosen model and offers the necessary services and capabilities. 

Plan the Cloud Migration Process Strategy

Develop a detailed migration strategy that outlines the sequence of steps, timelines, and resources required. Consider whether to adopt a lift-and-shift approach (rehosting), rearchitect the application (refactoring), or rebuild it from scratch. Determine the order of migration for different components, considering dependencies and criticality. 

Data Migration and Integration

Develop a robust data migration plan to transfer data from the existing system to the cloud. Ensure data integrity, consistency, and security during the transfer process. Plan for data synchronization between the on-premises system and the cloud to minimize downtime and ensure a smooth transition. 

Cloud Migration Process Refactor and Optimize

If rearchitecting or refactoring the application is part of the migration strategy, focus on optimizing the system for the cloud environment. This may involve breaking monolithic applications into microservices, leveraging cloud-native services, and optimizing performance and scalability. Use automation tools and frameworks to streamline the refactoring process. 

Ensure Security and Compliance

Implement security measures to protect data and applications in the cloud. This includes encryption, access controls, and monitoring. Ensure compliance with relevant regulations and industry standards, such as GDPR or HIPAA. Conduct thorough security testing and audits to identify and address any vulnerabilities. 

Cloud Migration  Process Test and Validate

Perform comprehensive testing at each stage of the migration process. Test functionality, performance, scalability, and integration to ensure that the migrated system meets the defined requirements. Conduct user acceptance testing (UAT) to validate the system’s usability and reliability. 

Implement Governance and Monitoring

Establish governance policies and procedures for managing the migrated system in the cloud. Define roles and responsibilities, access controls, and monitoring mechanisms. Implement cloud-native monitoring and alerting tools to ensure the ongoing performance, availability, and cost optimization of the system. 

Train and Educate Staff

Provide training and educational resources to the IT team and end-users to familiarize them with the new cloud environment. Ensure that they understand the benefits, features, and best practices for operating and managing the migrated system. Foster a culture of continuous learning and improvement. 

Execute the Migration Plan

Execute the migration plan in a phased manner, closely monitoring progress and addressing any issues or roadblocks that arise. Maintain clear communication channels with stakeholders and end-users throughout the process to manage expectations and address concerns. 

Post- Cloud Migration Process Optimization

Once the cloud migration process is complete then continuously optimize the system. Additionally,  it is optimized for better performance, scalability, and cost-efficiency. Leverage cloud-native services and tools to automate processes, monitor resource utilization, and make data-driven decisions for ongoing improvements. 

Conclusion

By following this framework, organizations can successfully migrate their organically grown systems to the cloud. Moreover unlocking the benefits of scalability, agility, cost savings, and enhanced performance in the modern cloud environment. 

Distribute Monolith Vs. Microservices

DevOps practices and culture have led to a growing trend of dividing monolith and microservices. Despite the efforts of the organizations involved, it is feasible that these monoliths have evolved into “distributed monoliths” rather than microservices. Since You’re Not Building Microservices argued that “you’ve substituted a single monolithic codebase for a tightly interconnected distributed architecture” (the piece that prompted this one).

It is difficult to determine whether your architecture is distributed monolithic or composed of several more microservices. It’s essential to remember that the answers to these questions may not always be clear-cut exceptions—after all, the current software is nothing if not complicated.

Let’s understand the definition of Distributed Monolith:

Distributed Monolith resembles microservices architecture but is monolithic. Microservices are misunderstood. Not merely dividing application entities into services and implementing CRUD with REST API. These services should only communicate synchronously.

Microservices apps have several benefits. Creating one may result in a distributed monolith..
Your microservice is a distributed monolith if:

  • One service change requires the redeployment of additional services. In a truly decoupled architecture, changes to one microservice should not require any changes to other services.
  • The microservices need low-latency communication. This can be a sign that the services are too tightly coupled and are unable to operate independently.
  • Your application’s tightly connected services share a resource, such as a database. This can lead to data inconsistency and other issues.
  • The microservices share codebases and test environments. This can make it difficult to make changes to individual services without affecting others.

What is Microservice Architecture

Instead of constructing a monolithic app, break it into more minor, interconnected services. Each microservice has a hexagonal architecture with business logic and adapters. Some microservices expose REST, RPC, or message-based APIs, and most services consume them. Microservice architecture affects the application-database connection. It duplicates data. Having a database schema per service ensures loose coupling in microservices. Polyglot persistence design allows a service to use the best database for its needs.

Mobile, desktop, and online apps use some APIs. Apps can’t access back-end services directly. API Gateways mediate communication. The API Gateway balances loads, caches data, controls access, and monitors API usage.

How to Differentiate Distributed Monoliths and Microservices

Building microservices and distributing monoliths are our goal. Sometimes implementation turns an app into a distributed monolith. Bad decisions or application requirements, etc. Some system attributes and behaviors can help you determine if a system has a microservice design or is a distributed monolith.

Shared Database

Dispersed services that share a database aren’t distributed—distributed monolith. Two services share a datastore.

A and B share a datastore. Changing Service B’s data structure in Datastore X will affect Service A. The system becomes dependent and tightly connected.

Small data changes affect other services. Loose coupling is ideal in a microservice architecture. Use case: If an e-commerce user table’s data structure changes. It shouldn’t affect products, payments, catalogs, etc. If your application redeploys all other services, it can hurt developer
productivity and customer experience.

Monolith and Microservices Codebase/Library

Microservices can share codebases or libraries despite having distinct ones. Shared library upgrades can disrupt dependent services and require re-deployment. Microservices become inefficient and changeable.
Consider using a private auth library across services. When a service updates the auth library, it forces all other services to redeploy. This will create a distributed monolith program. An abstracted library with a bespoke interface is a standard solution. In microservices, redundant code is better than tightly connected services.

Monolith and Microservices Sync Communication

Coupled services communicate synchronously.

If A needs B’s data or validation, it depends on B. Both services communicate synchronously. Service B fails or responds slowly, harming service A’s throughput. Too much synchronous communication between services can make a microservice-based app a distributed monolith.

Deployment/test environments shared

Continuous integration and deployments are essential for microservices architecture. If your services use shared deployment or standard CI/CD pipelines, deploying one service will re-deploy all other application services, even if they haven’t changed. It affects customer experience and burdens infrastructure. Loosely linked microservices need independent deployments.

Shared test environments are another criterion—shared test environments couple services, like deployments. Imagine a service that must pass a performance test before production. This stage tests the service’s performance. Suppose this service shares the test environment with
another that conducts performance tests simultaneously. It can impair both services and make it challenging to discover irregularities.

To sum up Monolith and Microservices

Creating microservices is more than simply dividing and repackaging an extensive monolithic application. Communication, data transfer across services, and more will have to be changed for this to work.

 

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