#MicroServices

[forever-stuck-on-java-8]

so it turns out they weren't kidding when they said breaking a monolith into microservices is hard.

[cpunch71]

microservice architecture is just one giant Rube Goldberg machine throwing JSON at each other

[connectinfo1999]

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[marsdevs]

Development Architectures: Monolith vs. Microservice

Unveiling the two titans of development architecture: the monolithic giant and the microservices army. Discover their strengths, weaknesses, and which reigns supreme for your next project. In this episode of Development Architectures: Monolith vs. Microservice.

[techsmarts]

YABI Yet another ByteByteGo Infographic: This one shows the difference between a traditioanl CRUD (create, read, update and delete) system and a more contemporary event sourcing system. Both achieve the same end result but the event sourcing model is more resilient to failure and data corruption. It also scales well in a microservices environment.

Although the diagram does not mention it, the two systems can be used in a complimentary fashion. The CRUD system can be exposed as a typical REST API which is very well understood by developers and quite easy to develop to. Meanwhile, within the organisation the CRUD methods can easily proxy to events. The net result is a modern event sourcing system internally with a low friction REST API for integration.

(via https://substack-post-media.s3.amazonaws.com/public/images/0a124ddf-8104-48fc-8f61-e190a73579e9_1529x1536.jpeg (1529×1536))

[codeonedigest]

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[goodoldbandit]

Code in Motion: A Journey Through Software Development Methodologies.

Sanjay Kumar Mohindroo Sanjay Kumar Mohindroo. skm.stayingalive.in Software Development Methodologies that examine Agile, DevOps, microservices, and serverless architectures. The Pulse of Modern Software An open call for curious minds Software changes our lives. Code powers our work and play. We shape code as we shape our future. Software Development Methodologies guide our craft. They give…

[fermanakgun]

Mikroservis Mimarisi: Avantajları ve Zorlukları

Mikroservis mimarisi, yazılım geliştirme süreçlerinde esneklik ve ölçeklenebilirlik sağladığı için son yıllarda oldukça popüler hale gelmiştir. Ancak bu mimari yaklaşımın avantajları olduğu kadar zorlukları da bulunmaktadır.

Mikroservis Mimarisi Avantajları

Ölçeklenebilirlik: Her bir servis bağımsız olarak ölçeklendirilebilir.

Esneklik: Yeni teknolojilere adaptasyon daha kolaydır.

Bağımsız Geliştirme: Farklı ekipler, farklı servisleri bağımsız olarak geliştirebilir.

Hata İzolasyonu: Bir serviste hata oluşsa bile tüm sistem etkilenmez.

Mikroservis Mimarisi Zorlukları

Dağıtık Sistem Yönetimi: Servisler arasında veri tutarlılığı ve iletişim yönetimi zor olabilir.

Artan Operasyonel Yük: Her servis ayrı ayrı dağıtılıp yönetilmelidir.

Bağımlılık Yönetimi: Servisler arasındaki bağımlılıkların iyi yönetilmesi gerekir.

Mikroservis mimarisi, büyük ve karmaşık projelerde esneklik sağlarken, yönetim ve operasyon açısından ekstra zorluklar getirebilir. Bu nedenle, projenin gereksinimlerine uygun olup olmadığı dikkatlice değerlendirilmelidir.

[emexotech1]

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[acquaintsofttech]

5 Important Signs Your Software Application Needs To Scale with Solutions

As the system grows, so do its complexities. With overloads and changing perspectives, there occur many signs your application needs to scale, sometimes immediately. You just need to maintain the system’s efficiency by handling the much-needed scalability aspect. However, knowing the right time to start with system scalability is tedious, especially for newcomers. You must take up this challenge…

[pythonfullstackmasters]

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[daniiltkachev]

Designing and Implementing Microservices in PHP 8 with Symfony: A Comprehensive Guide

- An introduction to microservices and their advantages in PHP environments. - Core microservices design patterns like API Gateway, Circuit Breaker, and Event Sourcing. - Service discovery techniques in Symfony. - Communication patterns, including synchronous and asynchronous messaging. - Deployment best practices using Docker, Kubernetes, and CI/CD pipelines. - Code snippets and practical examples to illustrate key concepts.

Introduction to Microservices

Microservices are an architectural approach to building software as a collection of small, independent services that communicate over a network (What are Microservices? - GeeksforGeeks). Each service is focused on a specific business capability, unlike monolithic architectures where all functionality resides in one tightly integrated codebase. This separation yields multiple advantages: microservices can be developed, deployed, and scaled independently, improving overall scalability and resilience (Creating Microservices with Symfony: A Guide for Businesses and Professionals - PHP Developer | Symfony | Laravel | Prestashop | Wordpress | ShopWare | Magento | Sylius | Drupal). For example, if one service becomes a bottleneck, you can scale only that service rather than the entire application. Maintenance is also easier since each service has a narrower scope (fewer intertwined dependencies) and teams can update one service without affecting others (Creating Microservices with Symfony: A Guide for Businesses and Professionals - PHP Developer | Symfony | Laravel | Prestashop | Wordpress | ShopWare | Magento | Sylius | Drupal). These benefits have led companies like Amazon, Uber, and Netflix to adopt microservices for faster development and more robust systems (Symfony in microservice architecture - Episode I : Symfony and Golang communication through gRPC - DEV Community). Why PHP and Symfony? PHP, especially with version 8, offers significant performance improvements and strong typing features that make it a viable choice for modern microservices. Symfony, one of the most widely used PHP frameworks, is well-suited for microservice architectures due to its modular design and rich ecosystem (PHP And Microservices: Guide For Advanced Web Architecture). Symfony’s component-based architecture (the “Swiss Army knife” of frameworks) lets you use only what you need for each microservice, avoiding bloat while still providing tools for common needs like routing, dependency injection, and caching (PHP And Microservices: Guide For Advanced Web Architecture). It integrates seamlessly with technologies often used in microservice environments (e.g. Docker, Redis, RabbitMQ), and its API Platform facilitates quickly building RESTful or GraphQL APIs (Creating Microservices with Symfony: A Guide for Businesses and Professionals - PHP Developer | Symfony | Laravel | Prestashop | Wordpress | ShopWare | Magento | Sylius | Drupal). In short, Symfony provides a robust foundation for building small, self-contained services with PHP, allowing teams to leverage their PHP expertise to build scalable microservices without reinventing the wheel.

Core Design Patterns for Microservices in Symfony

Designing microservices involves certain key patterns to manage the complexity of distributed systems. In this section, we discuss a few core design patterns – API Gateway, Circuit Breaker, and Event Sourcing – and how to implement or leverage them in a Symfony (PHP 8) context. API Gateway An API Gateway is a common pattern in microservices architectures where a single entry point handles all client interactions with the backend services (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). Instead of having clients call dozens of services directly (which would require handling multiple URLs, authentication with each service, etc.), the gateway provides one unified API. It can route requests to the appropriate microservice, aggregate responses from multiple services, and enforce cross-cutting concerns like authentication, rate limiting, and caching in one place (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers) (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). This simplifies client interactions and keeps the internal architecture flexible (services can change or be added without impacting external clients, as long as the gateway API remains consistent).

(Pattern: API Gateway / Backends for Frontends) Diagram: Using an API Gateway as a single entry point to route requests (REST calls in this example) to multiple backend microservices. The gateway can also provide client-specific APIs and handle protocol translation. In a Symfony project, you can implement an API Gateway as a dedicated Symfony application that proxies or orchestrates calls to the microservices. For instance, you might create a “Gateway” Symfony service that exposes REST endpoints to clients and internally uses Symfony’s HTTP client to call other microservices’ APIs. Symfony’s HttpClient component (or Guzzle) is useful for making these internal calls. The gateway can combine data from multiple services (for example, a product service and a review service) into one response before returning it to the client. Additionally, you could utilize Symfony’s security features at the gateway to authenticate incoming requests (e.g., validate a JSON Web Token) and only forward authorized requests to the downstream services (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). Tip: In many cases, teams use off-the-shelf API gateway solutions (like Kong, Traefik, or NGINX) in front of microservices. These are highly optimized for routing and policy enforcement. However, implementing a simple gateway in Symfony can make sense if you need custom aggregation logic or want to keep everything in PHP. Ensure that the gateway itself is stateless and scalable, as it can become a critical component. Circuit Breaker In a distributed system, failures are inevitable. The Circuit Breaker pattern is a design pattern for building fault-tolerant microservices that prevents cascading failures when a service is unresponsive or slow (What is Circuit Breaker Pattern in Microservices? - GeeksforGeeks). It works analogous to an electrical circuit breaker: if a service call fails repeatedly (e.g., due to the downstream service being down), the circuit breaker “trips” and subsequent calls to that service are short-circuited (i.e., fail immediately or return a fallback response) for a certain cooldown period (Pattern: Circuit Breaker) (What is Circuit Breaker Pattern in Microservices? - GeeksforGeeks). This stops wasting resources waiting on a dead service and gives the failing service time to recover. After the timeout, a few trial requests are allowed (“half-open” state); if they succeed, the circuit closes again, resuming normal operation (What is Circuit Breaker Pattern in Microservices? - GeeksforGeeks).

(What is Circuit Breaker Pattern in Microservices? - GeeksforGeeks) Circuit Breaker states and transitions: when a service call fails beyond a threshold, the breaker goes from Closed (normal operation) to Open (stop calls). After a delay, it enters Half-Open to test the service. Success closes the circuit (resuming calls); failure re-opens it. This pattern prevents one service’s failure from crashing others. In practice, implementing a circuit breaker in PHP/Symfony involves wrapping remote service calls (HTTP requests, database calls, etc.) with logic to monitor failures. For example, if a Symfony service calls another service via an HTTP client, you might use a counter (in memory or in a shared cache like Redis) to track consecutive failures. Once a threshold is exceeded, the client could immediately return an error (or a default fallback response) without attempting the remote call. After a set delay, it can try calling the service again to see if it’s back up. Libraries exist to assist with this in PHP – for instance, there are Symfony bundles and packages that provide circuit breaker functionality out-of-the-box (some use Redis or APCu to track state across instances). Using such a library or bundle can abstract away the boilerplate. If you prefer a custom solution, you can integrate it with Symfony’s event system or middleware. For example, you might create an HttpClient decorator that intercepts requests to certain hostnames and applies circuit-breaking logic. The key is to ensure that when the circuit is open, your code returns promptly, and that you log or monitor these events (so you’re aware of outages). By incorporating a circuit breaker, your Symfony microservice system becomes more resilient – a downstream failure in, say, the “Payment Service” will trigger quick failure responses in the “Order Service” instead of hanging threads and resource exhaustion (Pattern: Circuit Breaker). This keeps the overall system responsive and prevents a chain reaction of failures. Event Sourcing Event Sourcing is a design pattern that persists the state changes of an application as a sequence of events, rather than storing just the latest state (Event Sourcing). In an event-sourced system, every change (e.g., a user placed an order, an order was shipped) is recorded as an immutable event in an event log. The current state of an entity can always be derived by replaying the sequence of events from the beginning up to the present (Event Sourcing). This approach provides a complete audit trail of how the system reached its current state and enables powerful capabilities like time-travel (reconstructing past states) and event-driven integrations. In a Symfony microservices architecture, leveraging event sourcing can ensure data consistency across services and improve traceability (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). For example, instead of a traditional update that directly writes to a database, a microservice would emit an event like OrderPlaced or InventoryAdjusted. These events are stored (in a log or message broker), and the service’s own state (and other interested services’ states) are updated by consuming those events. By storing every event, you can rebuild the state of a service at any point in time by replaying the events in order (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). This is particularly useful in scenarios that require audit logs or retroactive computations (e.g., if a bug in logic is found, you can fix the code and replay events to correct the state). Symfony doesn’t have event sourcing built into its core, but you can implement it using libraries like Broadway or Prooph (PHP libraries specifically for event sourcing and CQRS) (CQRS and Event Sourcing implementation in PHP | TSH.io). These libraries integrate with Symfony and provide tools to define events, event stores (e.g., storing events in a database or event stream), and projectors (to build read models from events). The Symfony Messenger component can also play a role here by dispatching events to message handlers, which could persist them or propagate them to other services. Additionally, Symfony’s Event Dispatcher component is useful for decoupling internal logic via events – for instance, within a single microservice, domain events (like UserRegistered) can be dispatched and multiple listeners can react to update different parts of the state or send notifications (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). Implementing event sourcing requires careful planning of your event schema and handling eventual consistency (since state changes are not immediate but via events). For data that truly benefits from an audit log and history (like financial transactions or orders), event sourcing can greatly enhance consistency and auditability (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). However, it adds complexity, so it might not be necessary for every service. In Symfony, start by defining clear event classes and an event store. Ensure each service only acts on events relevant to it. Over time, you'll find you can evolve services by adding new event handlers or new event types without breaking existing ones – a key to maintainable, extensible microservices.

Service Discovery in Symfony

In a microservices architecture with many services running across different hosts or containers, service discovery is how services find each other’s locations (IP addresses/ports) dynamically. Unlike a monolith, where internal calls are just function calls, microservices need to know where to send requests for a given service. The set of active service instances is often changing – instances scale up or down, move, or restart – so hard-coding addresses is not feasible (Service Discovery Explained | Consul | HashiCorp Developer). Service discovery systems address this by keeping a registry of available service instances and allowing lookups by service name. There are two main approaches to service discovery: client-side and server-side. In client-side discovery, each microservice is responsible for querying a service registry (or using DNS) to find the endpoint of another service before calling it. Tools like Consul, etcd, or Eureka maintain a catalog of services that clients can query. In server-side discovery, a load balancer or gateway sits in front of services and routes requests to an available instance – here the clients just call the gateway with a logical name and the gateway/loader does the lookup. In Symfony-based microservices, you can implement service discovery in several ways: - Using Containers & DNS: If you deploy your Symfony services in Docker containers using orchestration tools (like Kubernetes or Docker Compose), you often get basic service discovery via DNS naming. For example, in Docker Compose, each service can be reached by its name as a hostname. In Kubernetes, every service gets a DNS name (e.g., http://product-service.default.svc.cluster.local) that resolves to the service’s IP (Symfony Microservices: A Comprehensive Guide to Implementation - Web App Development, Mobile Apps, MVPs for Startups - Digers). Read the full article

[praveennareshit]

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[johngai]

A Comprehensive Guide to Kubernetes Toolchains for Microservices

Kubernetes has become the de facto standard for managing containerized applications, particularly in the world of microservices. With Kubernetes, developers can seamlessly scale, manage, and automate deployments. However, managing a Kubernetes environment efficiently requires a robust set of tools to enhance the workflow, ensure smooth deployment, and monitor performance. In this detailed guide,…

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