Java Kubernetes 客户端 SSLHandshakeException 扩展 (5) 不应出现在证书请求中 [英] Java Kubernetes client SSLHandshakeException extension (5) should not be presented in certificate_request

问题描述

当我尝试在本地运行通过润滑油代理连接查询 Kubernetes 集群的 Java Kubernetes 客户端应用程序时，我收到扩展 (5) 不应出现在证书请求中".有什么想法吗?提前致谢

I am getting "extension (5) should not be presented in certificate_request" when trying to run locally a Java Kubernetes client application which queries the Kubernetes cluster over a lube proxy connection. Any thoughts? Thanks in advance

  ApiClient client = null;
    try {
        client = Config.defaultClient();
        //client.setVerifyingSsl(false);
    } catch (IOException e) {
        e.printStackTrace();
    }
    Configuration.setDefaultApiClient(client);

    CoreV1Api api = new CoreV1Api();
    V1PodList list = null;
    try {
        list = api.listPodForAllNamespaces(null, null, null, null, null, null, null, null, null);
    } catch (ApiException e) {
        e.printStackTrace();
    }
    for (V1Pod item : list.getItems()) {
        System.out.println(item.getMetadata().getName());
    }

推荐答案

您使用的是哪个版本的 Java?

Which version of Java are you using?

JDK 11 及更高版本支持 TLS 1.3，这可能会导致错误extension (5) should not be present in certificate_request.

JDK 11 onwards have support for TLS 1.3 which can cause the error extension (5) should not be presented in certificate_request.

将 -Djdk.tls.client.protocols=TLSv1.2 添加到 JVM 参数以使其使用 1.2.

Add -Djdk.tls.client.protocols=TLSv1.2 to the JVM args to make it use 1.2 instead.

Go lang 上存在与此相关的问题 https://github.com/golang/go/issues/35722 和那里的某人还发布了禁用 TLS 1.3Java端

There is an issue on Go lang relating to this https://github.com/golang/go/issues/35722 and someone there also posted to disable TLS 1.3 on the Java side

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