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我们已经使用 Spring Cloud 堆栈构建了一组微服务，我在开发时使用 Eureka 服务作为服务发现，但在将其移动到 Kubenretes 时，我们有两个选择

  1. 继续使用 Eureka 作为发现服务
  2. 开始使用原生 Kubernetes 服务

因此，我们选择了#2，因为使用 Kubernetes 原生服务比使用另一层重定向更有意义。

我们使用 Spring Cloud Zuul 作为 API Gatway 启用@DiscoveryClient以获取部署在命名空间中的服务，以便 Zuul 可以代理对底层服务的调用，设置工作良好，直到我们向命名空间添加新服务，API 网关无法找出新的添加的服务因此无法代理调用它，但是，如果重新启动 API 网关，那么它会发现添加的服务，所以它似乎无法即时解析新添加的服务，是否有配置或 jar我的设置中缺少

这是我的 API 网关 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.org.apigw</groupId>
    <artifactId>api-gateway</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.5.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>


    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.org.starters</groupId>
                <artifactId>org-starters</artifactId>
                <version>0.0.1-SNAPSHOT</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-kubernetes-all</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.11.0</version>
        </dependency>

        <dependency>
            <groupId>com.org.starters</groupId>
            <artifactId>org-observability-starter</artifactId>
        </dependency>
        <!-- enable ribbon auto retries -->
        <dependency>
            <groupId>org.springframework.retry</groupId>
            <artifactId>spring-retry</artifactId>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>

    </dependencies>


    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>


</project>

我的 API Gateway 配置如下所示：-

spring:
  application:
    name: api-gateway
  cloud.kubernetes.discovery.enabled: false

server:
  port: 9191

countryCode: ""

opa:
   host: http://localhost:8181
   
jwt:
   secret: "this is test secret key for development"
   expiration: 86400000
   tokenValidationEnabled: true

# fix gateway timeouts
hystrix.command.default.execution.timeout.enabled: false

ribbon:
  ReadTimeout: 30000
  ConnectTimeout: 30000
  MaxAutoRetries: 1
   
zuul:
   ribbon:
      eager-load:
         enabled: true
   host:
      connect-timeout-millis: 30000
      socket-timeout-millis: 30000
      # maxTotalConnections: 1700
      # maxPerRouteConnections: 100
   sensitiveHeaders:
   ignoredServices: ""
   #ignoredPatterns:
    #  - /as/*
   routes:
      service1:
         path: /svc1/**
         serviceId: svc1
         stripPrefix: true
         customSensitiveHeaders: false
      service2:
         path: /svc1/**
         serviceId: svc2
         stripPrefix: true
         customSensitiveHeaders: false
   include-debug-header: true
   debug.request: true
   debugFilters.disabled: false
   

logging.level:
   com.netflix.zuul: debug
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