Migrating Strategies to move Existing Applications to Microservices

Migrating Strategies to move Existing Applications to Microservices

Doesn’t it feel like microservices are everywhere these days?

Whenever you think of migrating a monolithic application to microservices, ask yourself two questions:

Should you migrate a monolith app to Microservices?

If so, when should you transit to Microservices?

First, let’s see the basic differences between a monolith app and microservices architecture below:

Monolith Architecture

Monolith Architecture

As you can see in the diagram, a monolith application is a single unit. It is a tightly coupled system that contains all the functional modules, business logic, background processing and various database-related operations.

It is good to develop a monolith application for simple purposes because it is easy to test it and there is only one application scheduled for a release.

But when there is a small bug, you need to do small changes and then create a new build and deploy it.

Scaling up an application is the biggest issue in monolith applications. Scaling only some parts of the application is not possible and you need to scale the entire system. In such situations, many organizations struggle with becoming agile hence each action takes too much time and effort.

Microservices Architecture

Microservices are loosely coupled systems and involve developing an application as sets of small services.

Each service is a separate system with its own framework and database. They are developed and deployed separately.  It should be used in large-scale projects which require real-time responses. Some of the most common reasons why organizations migrate their systems to microservices are scalability, flexibility, productivity and ease of maintenance.

Transitioning towards a microservice architecture needs through planning and also demands the consideration of a number of factors.

When you think of microservices, you must know that it has its own separate system and database. Break down your application slowly and incrementally. With this understanding, let’s find out how you can migrate a monolithic application to microservices.

There are many strategies to migrate monolith apps to microservices. However, below is a compilation of some practical strategies:

  1. Make a good transition plan
  2. Identify all logical modules and most independent modules.
  3. Identify inter-system relationships.
  4. Identify groups of modules.
  5. Prepare an individual service-wise database.
  6. Never allow migrated-service code to again fall in the monolith app.
  7. Migrate module groups to separate services and make separate deployments.
  8. You can also break an existing microservice into smaller ones.
  9. Make use of the event bus to communicate between microservices.

You should gradually deploy the transition process and it will help you achieve your goal.

Wrapping Up

So, this was our easy-to-understand and implement steps on migrating existing monolith apps to microservices. If you’re still unsure of utilizing application migration services and prefer to outsource cloud migration services, get in touch with DEV IT today. The company offers the most airtight cloud migration solutions.

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Arpita Mehta

Arpita Mehta

Sr. Software Developer (PHP) at Dev Information Technology Ltd.
My primary focus and inspiration is Web Development. I am constantly experimenting with new technologies and techniques.

2 thoughts on “Migrating Strategies to move Existing Applications to Microservices

  1. Pingback: Strategies How to Migrate Existing Applications to Microservices - DEV Community

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