Spring boot admin:客户端无法通过https向管理服务器注册

Question

我有几个spring-boot微服务，它们将自己注册到spring-boot-admin (SBA)。当我在本地运行微服务和SBA服务器时，客户端能够通过HTTP向SBA服务器注册自己。

当我将应用程序部署到Kubernetes集群时，向SBA的注册是通过HTTPS完成的(通过Ingress)我得到一个

javax.net.ssl.SSLHandshakeException在日志中

d.c.b.a.c.r.ApplicationRegistrator : Failed to register application as Application(name=my-app, managementUrl=https://my-app-dev.mydomain.com/actuator, healthUrl=https://my-app-dev.mydomain.com/actuator/health, serviceUrl=https://my-app-dev.mydomain.com) at spring-boot-admin ([https://my-admin-dev.mydomain.com/instances]): I/O error on POST request for "https://my-admin-dev.mydomain.com/instances": Received fatal alert: protocol_version; nested exception is javax.net.ssl.SSLHandshakeException: Received fatal alert: protocol_version. Further attempts are logged on DEBUG level

在微服务( SBA客户端)中，我使用以下依赖项

de.codecentric
  spring-boot-admin-starter-client
  2.4.0

和以下内容application.yaml

spring.boot.admin.client:
  url: "https://my-admin-dev.mydomain.com"
  instance.service-url: "https://my-app-dev.mydomain.com"

Answer 1

我能够深入到spring-boot-admin-starter-client代码。首先，我从ApplicationRegistrator从日志消息中找到了一个可重写的BlockingRegistrationClient实例(耶！)

public class SpringBootAdminClientAutoConfiguration {
    ...
    @Configuration(proxyBeanMethods = false)
    @ConditionalOnBean(RestTemplateBuilder.class)
    public static class BlockingRegistrationClientConfig {
        @Bean
        @ConditionalOnMissingBean
        public BlockingRegistrationClient registrationClient(ClientProperties client) {
            RestTemplateBuilder builder = new RestTemplateBuilder().setConnectTimeout(client.getConnectTimeout())
                    .setReadTimeout(client.getReadTimeout());
            if (client.getUsername() != null && client.getPassword() != null) {
                builder = builder.basicAuthentication(client.getUsername(), client.getPassword());
            }
            return new BlockingRegistrationClient(builder.build());
        }
    }

使用此post作为我的指南，我能够创建一个RestTemplate将信任存储区加载到SSLContext。然后，我可以重写BlockingRegistrationClient实例，它包装了自定义的RestTemplate。

@Bean
public BlockingRegistrationClient registrationClient(
        @Value("${ssl.protocol}") String protocol,
        @Value("${ssl.trustStore.path}") String trustStorePath,
        @Value("${ssl.trustStore.password}") String trustStorePassword,
        ClientProperties client) throws Exception {

    SSLContext sslContext = SSLContextBuilder.create()
            .loadTrustMaterial(new File(trustStorePath), trustStorePassword.toCharArray())
            .setProtocol(protocol)
            .build();

    CloseableHttpClient httpClient = HttpClientBuilder.create()
            .setSSLContext(sslContext)
            .build();

    RestTemplateBuilder builder = new RestTemplateBuilder()
            .setConnectTimeout(client.getConnectTimeout())
            .setReadTimeout(client.getReadTimeout())
            .requestFactory(() -> new HttpComponentsClientHttpRequestFactory(httpClient));

    if (client.getUsername() != null && client.getPassword() != null) {
        builder = builder.basicAuthentication(client.getUsername(), client.getPassword());
    }
    return new BlockingRegistrationClient(builder.build());
}

application.yaml

ssl:
  protocol: TLSv1.2
  trustStore:
    path: "/opt/java/openjdk/lib/security/cacerts"
    password: "*****"