Spring Cloud Microservices Revised Edition – Intro and New Tech Stack

Why rewrite?

Spring Boot 2.7.x and Spring Cloud 2021.x used in the original series are now outdated. The mainstream ecosystem has moved to Spring Boot 3.x, which includes Jakarta EE namespace changes, GraalVM native‑image support, and new observability APIs. The original demos lacked production‑grade examples, covered only Docker deployment, and scattered code forced readers to copy snippets from blog posts.

New technical stack (Spring Cloud Microservices Reboot)

Framework layer : Spring Boot 3.2.x (or 3.3.x), Spring Cloud 2023.x, Java 17/21

Service governance : Nacos 2.3.x (service registration & configuration), Spring Cloud Gateway 4.x, OpenFeign 4.x, built‑in LoadBalancer (replaces Ribbon)

Fault tolerance : Sentinel 1.8.6

Tracing : SkyWalking 9.x

Distributed transactions : Seata 1.7.x (AT and TCC modes)

Deployment : Docker + Docker Compose, Kubernetes 1.28+ (YAML manifests), Helm Charts

Observability : Micrometer + Prometheus, Grafana dashboards, Loki log aggregation

Series plan (12 episodes)

Intro and architecture design – comparison of old vs. new versions and technology‑selection rationale

Nacos service registration & discovery – compatibility, multi‑environment isolation (namespace + group)

OpenFeign service calls – HTTP client changes and usage patterns

Spring Cloud Gateway – WebFlux changes, unified JWT authentication

Nacos configuration center – dynamic refresh, encrypted configurations

Sentinel fault tolerance – rate limiting, circuit breaking, persistence, production tuning

SkyWalking tracing – new probes, alert configuration

Seata distributed transactions – AT vs. TCC comparison, performance optimization

Micrometer observability – metric collection, Grafana panels

Docker Compose full deployment – one‑click start of all services

Kubernetes production deployment – Deployment, Service, Ingress, HPA

Performance testing & tuning – JMeter scripts, full post‑mortem analysis

Project repository

Repository URL: https://github.com/chenranyi/spring-cloud-reboot.git Directory layout (representative):

spring-cloud-microservice-reboot/
├── parent/                # parent pom for unified version management
├── common/                # shared utilities
├── user-service/          # user domain service
├── article-service/       # article domain service
├── comment-service/       # comment domain service
├── gateway/               # API gateway
├── docker-compose/        # Docker Compose files
├── k8s/                   # Kubernetes manifests
│   ├── namespace.yaml
│   ├── configmap.yaml
│   ├── deployments/
│   ├── services/
│   └── ingresses/
├── helm-charts/           # Helm chart definitions
├── monitoring/            # Prometheus, Grafana, Loki configs
│   ├── prometheus.yml
│   └── grafana-dashboards/
└── scripts/               # helper scripts (e.g., docker-build.sh)

Each episode is tagged in the repository (e.g., reboot-ep01, reboot-ep02, … reboot-ep12).

Comparison with the original edition

Spring Boot : 2.7.x → 3.2.x/3.3.x

Spring Cloud : 2021.x → 2023.x

Java version : 8/11 → 17/21

Jakarta EE namespace : javax.* → jakarta.* Project organization : scattered code → unified multi‑module repository

Production examples : minimal demos → complete runnable projects for each component

Kubernetes deployment : simple examples → full YAML manifests + Helm charts

Observability : none → Prometheus + Grafana + Loki integration

Performance testing : absent → full JMeter scripts with analysis

GraalVM native image : not covered → step‑by‑step native‑image build guide using Spring Boot 3.x