Mastering Microservices: Your Comprehensive Guide to Modern Software Design
Tags: microservices, softwaredesign, programming, tutorial
Published: 2023-10-09 13:30:02

// Edit 1 based on comments received

_This article is written to help those who are taking design decisions, You can read through if you want insights on those. If you have reached here in search of how to write microservices? This article is not for you, there are plenty other available on internet._

// Edit 1 closed

Microservices architecture in a software design is an approach of breaking down the complex application into multiple smaller and loosely coupled services, which can operate independently and communicate clearly via APIs. Each service focuses on a specific function or feature, making individual components easier to design, deploy, and expand. This architecture encourages flexibility, agility, and the capacity to more effectively evolve and maintain software, particularly in big and frequently changing applications.

We are going to talk about benefits of using Microservices architecture, when to use them, when not. Along with challenges and best practices of Microservices architecture.

## Benefits of using Microservices Architecture:

1. **Scalability**: It is Easy to scale individual services, based on traffic or usage without impacting others.
2. **Agility**: Faster development and updates/deployments, whatever tested can be deployed.
3. **Flexibility**: Smaller teams can choose diverse tech stacks for their services.
4. **Fault Isolation**: Isolate failures to service level, which could easily be found using separate logs identifier.
5. **Team Autonomy**: Empower small teams.
6. **High Availability**: Enhance fault tolerance, we just need to fix and redeploy the culprit service.
7. **Incremental Updates**: Release features independently, we need not to keep the ready features awaited because 2 features are not finished for monolithic bundle.
8. **Hybrid Cloud and Multi-Cloud Environments**: You can deploy your services in Hybrid Cloud and Multi-Cloud Environments.

## When to use Microservices?
Microservices architecture are very well suited for below mentioned applications

### 1. Complex Applications:
Microservices architecture may help manage the complexity of large, complex applications with various features and capabilities by splitting the application down into smaller, more manageable services. You can single service for single functionality like login/register is one, managing dashboard is another service, and so on. Like SRP for functions, microservices for functionality.

### 2. Varying Scalability Needs:
If you anticipate varying workloads and need to scale particular services of your application independently, microservices enable you to scale/descale only the services that demand more/less resources respectively rather than the complete application.

### 3. Frequent Updates Needed:
Microservices are great for applications which require regular upgrades, new launches, or bug fixes since they facilitate rapid development and deployment cycles.

### 4. High Availability:
By separating failures to individual services, microservices can improve fault tolerance and offer high availability by lowering the danger of a single point of failure affecting the entire application.

### 5. A Team with Diverse Technology Stacks:
When you have a tech team with diverse stack and resilient in migrating their tech preference, choosing this could be a good option. You can distribute them into multiple teams and use their tech to the best part of your application and club the services for producing even better solution.

## When not to use Microservices architecture?

As nothing fits all in software design so the microservices architecture, we have to refrain using it for following scenarios - 

### 1. Simple Applications:
When the application is simple, we should avoid the network and configuration overhead of microservices architecture. Monolithic would be better option here.

### 2. Limited Resources:
The complexity offered by microservices may cause issues in terms of development, maintenance, and orchestration. If you have limited development resources or a small team, you should refrain using this architecture.

### 3. Data-Intensive Applications:
If your Application is highly based on complex data base transactions, you should avoid using microservices architecture because it makes hard to maintain data consistency. I am not saying maintaining data consistency will be impossible but that will need extra efforts and resources. We should follow the cost effective way ;)

Finally, the decision to employ microservices should be based on a thorough examination of your project's unique requirements, goals, and restrictions. When deciding whether microservices are the correct architectural approach, consider aspects such as team skills, project size, scalability needs, and the nature of the program.

## Challenges:
I have been working with microservices architecture for more than 6 years now, I have found using microservices architecture comes with following caveats

1. Increased Complexity
2. Resources Overhead
3. Tooling Monitoring
4. Documentations and Communications
5. Cost Management
6. Learning Curve
7. Versioning
8. Service Coordination 
9. Data Management

## Best Practices:
After writing this long, I think the quality of blog is getting degraded and this is turning to a long post instead a bit size blog. I will write the best practices in details and link that article to this.

// Edit 2

I have got time to create the second part of this article [Navigating Microservices: Proven Strategies for Streamlined Development and Scalability](https://dev.to/dr_anks/navigating-microservices-proven-strategies-for-streamlined-development-and-scalability-2m3f)

// Edit 2 closed

Thoughts or questions, are welcome in comment box...

Till the next time keep Learning-Coding-and-Growing.