What Are Microservices and How Do They Work?

TL;DR

Microservices are an architectural style that breaks applications into smaller, independent services based on business functionalities, allowing for flexible development, deployment, and scaling. They communicate through API calls, message brokers, or service meshes, addressing the limitations of monolith architecture. Code management can be done using a monorepo or polyrepo approach, each bringing its own set of advantages and challenges.

Transcript

in this video i'm going to talk about microservices first i'm going to start by explaining what a monolith application architecture is what were some of the challenges of a monolith architecture and why the industry moved slowly towards the microservices architecture then we will see what microservices or microservice architecture is exactly as wel... Read More

Key Insights

• 🥺 Monolith architecture posed challenges in coordination, scaling, and release processes, leading to the shift towards microservices.
• 🤳 Microservices are self-contained services developed and deployed independently based on business functionalities.
• 🤙 Communication between microservices can be achieved through API calls, message brokers, or service mesh.
• 👨‍💻 Code management for microservices can be done through monorepo or polyrepo approaches, each with advantages and challenges.
• 🔨 Various tools, such as Kubernetes and HashiCorp's technologies, help simplify the deployment and management of microservices applications.
• 🥳 Companies like Amazon, Google, and Netflix deploy microservices applications multiple times a day using sophisticated CI/CD pipelines.
• 😄 Choosing between monorepo and polyrepo depends on the size of the project, the need for isolation, ease of code management, and collaboration requirements.

Questions & Answers

Q: What are the challenges of a monolith architecture?

Monolith architecture leads to difficulties in coordinating between teams due to the tangled codebase, inflexible scaling options, and longer release processes when making changes to any part of the application.

Q: How are microservices broken down based on business functionalities?

Microservices are divided into components like products, shopping cart, user accounts, and checkout, ensuring that each service handles one isolated task and follows the principle of loose coupling.

Q: What are the different communication methods between microservices?

Microservices can communicate through synchronous API calls, asynchronous messaging using a message broker, or using a service mesh that delegates communication logic to an external service.

Q: What are the advantages of polyrepo over monorepo for code management?

Polyrepo allows complete isolation between services, facilitates separate teams for each service, and avoids problems with shared code or slow cloning speeds. However, it can make working on the project as a whole more challenging.

Key Insights:

• Monolith architecture posed challenges in coordination, scaling, and release processes, leading to the shift towards microservices.
• Microservices are self-contained services developed and deployed independently based on business functionalities.
• Communication between microservices can be achieved through API calls, message brokers, or service mesh.
• Code management for microservices can be done through monorepo or polyrepo approaches, each with advantages and challenges.
• Various tools, such as Kubernetes and HashiCorp's technologies, help simplify the deployment and management of microservices applications.
• Companies like Amazon, Google, and Netflix deploy microservices applications multiple times a day using sophisticated CI/CD pipelines.
• Choosing between monorepo and polyrepo depends on the size of the project, the need for isolation, ease of code management, and collaboration requirements.
• Proper configuration, monitoring, and tools are essential to ensure the smooth functioning of microservices applications.

Summary & Key Takeaways

• Monolith architecture involves developing and deploying applications as a single unit, which leads to challenges such as coordination between teams, inflexible scaling, and longer release processes.

• Microservices break down the application into smaller, self-contained services based on business functionalities, allowing for independent development, deployment, and scaling.

• Communication between microservices can be achieved through API calls, message brokers, or service mesh, each with its own benefits and considerations.

• Code management for microservices can be done through a monorepo or polyrepo approach, each with its own advantages and challenges.