Spring Cloud Alibaba微服务全家桶实战：从0到1搭高可用生产级架构

Dicky-_-zhang

336人浏览 · 2026-05-17 23:50:07

Dicky-_-zhang · 2026-05-17 23:50:07 发布

Spring Cloud Alibaba微服务全家桶实战：从0到1搭高可用生产级架构

大家好，我是迪哥。2023 年我们把 Spring Cloud Netflix 全套换成了 Spring Cloud Alibaba，稳定性提升了 50%，运维成本降了 60%。今天就聊聊，Nacos、Sentinel、Seata 这三剑客，如何撑起我们的百万级电商系统。

为什么选择 Spring Cloud Alibaba？

组件	Netflix	Alibaba
服务注册	Eureka（停更）	Nacos（活跃）
服务熔断	Hystrix（停更）	Sentinel（活跃）
分布式事务	无	Seata
配置中心	Spring Cloud Config	Nacos Config
网关	Zuul	Spring Cloud Gateway

架构全景

┌─────────────────────────────────────────────────────────────┐
│                      Client (Web/App)                         │
└────────────────────────┬────────────────────────────────────┘
                         │
                    ┌────▼─────┐
                    │  Gateway  │ (Spring Cloud Gateway)
                    └────┬─────┘
                         │
        ┌────────────────┼────────────────┐
        │                │                │
   ┌────▼─────┐   ┌─────▼────┐    ┌─────▼─────┐
   │  Order   │   │  User    │    │  Payment  │
   └────┬─────┘   └─────┬────┘    └─────┬─────┘
        │                │                │
   ┌────▼─────┐   ┌─────▼────┐    ┌─────▼─────┐
   │ Sentinel │   │  Nacos   │    │   Seata   │
   │ (限流熔断)│   │(注册配置)│    │(分布式事务)│
   └──────────┘   └──────────┘    └───────────┘

Nacos：服务注册与配置中心

pom.xml

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

application.yml

spring:
  application:
    name: order-service
  cloud:
    nacos:
      discovery:
        server-addr: nacos1:8848,nacos2:8848,nacos3:8848
        namespace: prod
        group: order-group
      config:
        server-addr: nacos1:8848,nacos2:8848,nacos3:8848
        namespace: prod
        group: order-group
        file-extension: yaml
        refresh-enabled: true

Nacos 集群部署

# docker-compose.yml
version: '3'
services:
  nacos1:
    image: nacos/nacos-server:v2.2.3
    environment:
      MODE: cluster
      NACOS_SERVERS: nacos1:8848 nacos2:8848 nacos3:8848
      SPRING_DATASOURCE_PLATFORM: mysql
      MYSQL_SERVICE_HOST: mysql
    volumes:
      - ./logs/nacos1:/home/nacos/logs
  nacos2: ...
  nacos3: ...

Sentinel：流量控制与熔断降级

pom.xml

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

代码示例

@RestController
@RequestMapping("/api/order")
public class OrderController {

    @PostMapping
    @SentinelResource(
        value = "createOrder",
        blockHandler = "handleBlock",
        fallback = "handleFallback"
    )
    public OrderResult createOrder(@RequestBody Order order) {
        return orderService.create(order);
    }

    public OrderResult handleBlock(Order order, BlockException e) {
        return OrderResult.error("系统繁忙，请稍后再试");
    }

    public OrderResult handleFallback(Order order, Throwable e) {
        return OrderResult.error("服务异常，请稍后再试");
    }
}

动态规则

@Configuration
public class SentinelConfig {
    @PostConstruct
    public void initFlowRules() {
        List<FlowRule> rules = new ArrayList<>();
        FlowRule rule = new FlowRule();
        rule.setResource("createOrder");
        rule.setGrade(RuleConstant.FLOW_GRADE_QPS);
        rule.setCount(10000); // 每秒最多 10000 次
        rules.add(rule);
        FlowRuleManager.loadRules(rules);
    }
}

Seata：分布式事务

pom.xml

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-seata</artifactId>
</dependency>

application.yml

seata:
  tx-service-group: order-tx-group
  config:
    type: nacos
    nacos:
      server-addr: nacos1:8848
      namespace: prod
  registry:
    type: nacos
    nacos:
      server-addr: nacos1:8848
      namespace: prod

代码示例

@Service
public class OrderService {

    @Autowired
    private StockFeignClient stockFeignClient;

    @Autowired
    private AccountFeignClient accountFeignClient;

    @GlobalTransactional(name = "order-create-tx", rollbackFor = Exception.class)
    public Order create(Order order) {
        // 1. 本地创建订单
        orderMapper.insert(order);

        // 2. 扣库存
        stockFeignClient.deduct(order.getProductId(), order.getCount());

        // 3. 扣余额
        accountFeignClient.debit(order.getUserId(), order.getAmount());

        return order;
    }
}

Gateway：API 网关

pom.xml

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

application.yml

spring:
  application:
    name: gateway
  cloud:
    nacos:
      discovery:
        server-addr: nacos1:8848
    gateway:
      discovery:
        locator:
          enabled: true
      routes:
        - id: order-service
          uri: lb://order-service
          predicates:
            - Path=/api/order/**
          filters:
            - StripPrefix=2
            - name: Sentinel

最佳实践清单

组件	推荐配置
Nacos	3 节点集群，数据库持久化，开启鉴权
Sentinel	控制台 + 持久化规则（Nacos/Redis）
Seata	AT 模式适合大多数场景，TC 高可用集群
Gateway	限流熔断 + 超时控制 + 日志记录