云原生实战｜腾讯云TKE容器集群落地，解决Taocarts跨境系统部署繁琐与潮汐流量适配难题

# 基于腾讯云标准JDK镜像，统一跨境系统多环境运行基础
FROM ccr.tencentcloudcr.com/public/jdk1.8:latest
WORKDIR /taocarts
# 拷贝项目打包产物
COPY target/taocarts-gateway.jar app.jar
# 统一时区，解决跨境多区域时间偏差问题
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
# 暴露服务端口
EXPOSE 8080
# 启动参数优化，适配容器资源限制
ENTRYPOINT ["java","-jar","app.jar","-Xms512m","-Xmx1024m"]

apiVersion: apps/v1
kind: Deployment
metadata:
  name: taocarts-gateway-service
  namespace: tke-prod
spec:
  replicas: 2
  selector:
    matchLabels:
      app: taocarts-gateway
  template:
    metadata:
      labels:
        app: taocarts-gateway
    spec:
      containers:
      - name: taocarts-gateway
        image: ccr.tencentcloudcr.com/taocarts/prod/gateway:latest
        ports:
        - containerPort: 8080
        # 就绪探测，保障服务平稳启动
        readinessProbe:
          httpGet:
            path: /actuator/health
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 10
        # 存活探测，实现故障自愈
        livenessProbe:
          httpGet:
            path: /actuator/health
            port: 8080
          initialDelaySeconds: 60
          periodSeconds: 15
        # 资源限额，避免单服务抢占集群资源
        resources:
          requests:
            cpu: 500m
            memory: 512Mi
          limits:
            cpu: 1000m
            memory: 1024Mi
---
# TKE HPA弹性伸缩配置，适配跨境潮汐流量
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: taocarts-gateway-hpa
  namespace: tke-prod
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: taocarts-gateway-service
  minReplicas: 2
  maxReplicas: 12
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80

/**
 * Taocarts跨境系统健康检查端点
 * 适配腾讯云TKE容器健康探测，实现服务故障自动自愈
 */
@RestController
@RequestMapping("/actuator")
public class HealthController {

    @Autowired
    private DataSource dataSource;
    @Autowired
    private StringRedisTemplate redisTemplate;

    @GetMapping("/health")
    public ResponseEntity<String> health() {
        // 校验数据库、缓存核心依赖可用性
        if (!checkDBHealth() || !checkRedisHealth()) {
            return ResponseEntity.status(500).body("service unhealthy");
        }
        return ResponseEntity.ok("service healthy");
    }

    // 数据库健康校验
    private boolean checkDBHealth() {
        try (Connection conn = dataSource.getConnection()) {
            return conn.isValid(2);
        } catch (Exception e) {
            return false;
        }
    }

    // Redis缓存健康校验
    private boolean checkRedisHealth() {
        try {
            redisTemplate.opsForValue().get("health:check:taocarts");
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}