使用AWS Java SDK v2从AWS EKS获取身份验证令牌

Question

如何使用AWS Java SDK V2从AWS EKS获得Kubernetes身份验证令牌？一个身份验证令牌，然后可以使用Kubernetes SDK与Kubernetes进行身份验证。换句话说，我希望从EKS获得一个身份验证令牌，用于对Kubernetes进行身份验证，这样我就不必创建“Kube配置”。

我实际上得到了一个使用AWS Java SDK v1（而不是v2)的解决方案，查看下面开放问题中的代码示例。这里还有一个Python代码示例，但我在AWS Java SDK V2中没有取得任何成功。我尝试用AWS Java SDK V2来实现这一点：

java prettyprint-override">public static String getAuthenticationToken(AwsCredentialsProvider awsAuth, Region awsRegion, String clusterName) {
    try {
        SdkHttpFullRequest requestToSign = SdkHttpFullRequest
                .builder()
                .method(SdkHttpMethod.GET)
                .uri(new URI("https", String.format("sts.%s.amazonaws.com", awsRegion.id()), null, null))
                .appendHeader("x-k8s-aws-id", clusterName)
                .appendRawQueryParameter("Action", "GetCallerIdentity")
                .appendRawQueryParameter("Version", "2011-06-15")
                .build();

        ZonedDateTime expirationDate = DateUtil.addSeconds(DateUtil.now(), 60);
        Aws4PresignerParams presignerParams = Aws4PresignerParams.builder()
                .awsCredentials(awsAuth.resolveCredentials())
                .expirationTime(expirationDate.toInstant())
                .signingName("sts")
                .signingRegion(awsRegion)
                .build();

        SdkHttpFullRequest signedRequest = Aws4Signer.create().presign(requestToSign, presignerParams);

        String encodedUrl = Base64.getUrlEncoder().withoutPadding().encodeToString(signedRequest.getUri().toString().getBytes(CharSet.UTF_8.getCharset()));
        return ("k8s-aws-v1." + encodedUrl);
    } catch (Exception e) {
        String errorMessage = "A problem occurred generating an Eks token";
        logger.error(errorMessage, e);
        throw new RuntimeException(errorMessage, e);
    }
}

AWS Java SDK v1版本如下所示：（来自前面提到的开放问题）

我让它工作了，但我很难得到类似于在AWS Java SDK V2中工作的东西。

private String generateToken(String clusterName,
                                 Date expirationDate,
                                 String serviceName,
                                 String region,
                                 AWSSecurityTokenServiceClient awsSecurityTokenServiceClient,
                                 AWSCredentialsProvider credentialsProvider,
                                 String scheme,
                                 String host) throws URISyntaxException {
        try {
            DefaultRequest<GetCallerIdentityRequest> callerIdentityRequestDefaultRequest = new DefaultRequest<>(new GetCallerIdentityRequest(), serviceName);
            URI uri = new URI(scheme, host, null, null);
            callerIdentityRequestDefaultRequest.setResourcePath("/");
            callerIdentityRequestDefaultRequest.setEndpoint(uri);
            callerIdentityRequestDefaultRequest.setHttpMethod(HttpMethodName.GET);
            callerIdentityRequestDefaultRequest.addParameter("Action", "GetCallerIdentity");
            callerIdentityRequestDefaultRequest.addParameter("Version", "2011-06-15");
            callerIdentityRequestDefaultRequest.addHeader("x-k8s-aws-id", clusterName);

            Signer signer = SignerFactory.createSigner(SignerFactory.VERSION_FOUR_SIGNER, new SignerParams(serviceName, region));
            SignerProvider signerProvider = new DefaultSignerProvider(awsSecurityTokenServiceClient, signer);
            PresignerParams presignerParams = new PresignerParams(uri,
                    credentialsProvider,
                    signerProvider,
                    SdkClock.STANDARD);

            PresignerFacade presignerFacade = new PresignerFacade(presignerParams);
            URL url = presignerFacade.presign(callerIdentityRequestDefaultRequest, expirationDate);
            String encodedUrl = Base64.getUrlEncoder().withoutPadding().encodeToString(url.toString().getBytes());
            log.info("Token [{}]", encodedUrl);
            return "k8s-aws-v1." + encodedUrl;
        } catch (URISyntaxException e) {
            log.error("could not generate token", e);
            throw e;
        }
    }

Answer 1

好吧，我终于让它起作用了。

AWS Java SDK v2版本：

public static String getAuthenticationToken(AwsCredentialsProvider awsAuth, Region awsRegion, String clusterName) {
    try {    
        SdkHttpFullRequest requestToSign = SdkHttpFullRequest
                .builder()
                .method(SdkHttpMethod.GET)
                .uri(StsUtil.getStsRegionalEndpointUri(awsRegion))
                .appendHeader("x-k8s-aws-id", clusterName)
                .appendRawQueryParameter("Action", "GetCallerIdentity")
                .appendRawQueryParameter("Version", "2011-06-15")
                .build();

        ZonedDateTime expirationDate = DateUtil.addSeconds(DateUtil.now(), 60);
        Aws4PresignerParams presignerParams = Aws4PresignerParams.builder()
                .awsCredentials(awsAuth.resolveCredentials())
                .signingRegion(awsRegion)
                .signingName("sts")
                .signingClockOverride(Clock.systemUTC())
                .expirationTime(expirationDate.toInstant())
                .build();

        SdkHttpFullRequest signedRequest = Aws4Signer.create().presign(requestToSign, presignerParams);

        String encodedUrl = Base64.getUrlEncoder().withoutPadding().encodeToString(signedRequest.getUri().toString().getBytes(CharSet.UTF_8.getCharset()));
        return ("k8s-aws-v1." + encodedUrl);
    } catch (Exception e) {
        String errorMessage = "A problem occurred generating an Eks authentication token for cluster: " + clusterName;
        logger.error(errorMessage, e);
        throw new RuntimeException(errorMessage, e);
    }
}

问题出在我的STS终结点URI中：

public static URI getStsRegionalEndpointUri(Region awsRegion) {
    try {
        return new URI("https", String.format("sts.%s.amazonaws.com", awsRegion.id()), "/", null);
    } catch (URISyntaxException shouldNotHappen) {
        String errorMessage = "An error occurred creating the STS regional endpoint Uri";
        logger.error(errorMessage, shouldNotHappen);
        throw new RuntimeException(errorMessage, shouldNotHappen);
    }
}

.signingClockOverride(Clock.systemUTC())

这并不是必需的，但是最初的AWS Java SDK v1在指定sdkclock.standard时确实使用了时钟，而我在AWS Java SDK v2版本中使用的zoneddatetime确实使用了UTC时区。