Github user liyinan926 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19717#discussion_r154134373
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/steps/DriverKubernetesCredentialsStep.scala
---
@@ -0,0 +1,244 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.deploy.k8s.submit.steps
+
+import java.io.File
+import java.nio.charset.StandardCharsets
+
+import scala.collection.JavaConverters._
+import scala.language.implicitConversions
+
+import com.google.common.io.{BaseEncoding, Files}
+import io.fabric8.kubernetes.api.model.{ContainerBuilder, PodBuilder,
Secret, SecretBuilder}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.deploy.k8s.Config._
+import org.apache.spark.deploy.k8s.Constants._
+import org.apache.spark.deploy.k8s.submit.KubernetesDriverSpec
+
+/**
+ * Mounts Kubernetes credentials into the driver pod. The driver will use
such mounted credentials
+ * to request executors.
+ */
+private[spark] class DriverKubernetesCredentialsStep(
+ submissionSparkConf: SparkConf,
+ kubernetesResourceNamePrefix: String) extends DriverConfigurationStep {
+
+ private val maybeMountedOAuthTokenFile = submissionSparkConf.getOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$OAUTH_TOKEN_FILE_CONF_SUFFIX")
+ private val maybeMountedClientKeyFile = submissionSparkConf.getOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CLIENT_KEY_FILE_CONF_SUFFIX")
+ private val maybeMountedClientCertFile = submissionSparkConf.getOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CLIENT_CERT_FILE_CONF_SUFFIX")
+ private val maybeMountedCaCertFile = submissionSparkConf.getOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CA_CERT_FILE_CONF_SUFFIX")
+ private val driverServiceAccount =
submissionSparkConf.get(KUBERNETES_SERVICE_ACCOUNT_NAME)
+
+ override def configureDriver(driverSpec: KubernetesDriverSpec):
KubernetesDriverSpec = {
+ val driverSparkConf = driverSpec.driverSparkConf.clone()
+
+ val oauthTokenBase64 = submissionSparkConf
+
.getOption(s"$KUBERNETES_AUTH_DRIVER_CONF_PREFIX.$OAUTH_TOKEN_CONF_SUFFIX")
+ .map { token =>
+
BaseEncoding.base64().encode(token.getBytes(StandardCharsets.UTF_8))
+ }
+ val caCertDataBase64 = safeFileConfToBase64(
+ s"$KUBERNETES_AUTH_DRIVER_CONF_PREFIX.$CA_CERT_FILE_CONF_SUFFIX",
+ "Driver CA cert file provided at %s does not exist or is not a
file.")
+ val clientKeyDataBase64 = safeFileConfToBase64(
+
s"$KUBERNETES_AUTH_DRIVER_CONF_PREFIX.$CLIENT_KEY_FILE_CONF_SUFFIX",
+ "Driver client key file provided at %s does not exist or is not a
file.")
+ val clientCertDataBase64 = safeFileConfToBase64(
+
s"$KUBERNETES_AUTH_DRIVER_CONF_PREFIX.$CLIENT_CERT_FILE_CONF_SUFFIX",
+ "Driver client cert file provided at %s does not exist or is not a
file.")
+
+ val driverSparkConfWithCredentialsLocations =
setDriverPodKubernetesCredentialLocations(
+ driverSparkConf,
+ oauthTokenBase64,
+ caCertDataBase64,
+ clientKeyDataBase64,
+ clientCertDataBase64)
+
+ val kubernetesCredentialsSecret = createCredentialsSecret(
+ oauthTokenBase64,
+ caCertDataBase64,
+ clientKeyDataBase64,
+ clientCertDataBase64)
+
+ val driverPodWithMountedKubernetesCredentials =
kubernetesCredentialsSecret.map { secret =>
+ new PodBuilder(driverSpec.driverPod)
+ .editOrNewSpec()
+ .addNewVolume()
+ .withName(DRIVER_CREDENTIALS_SECRET_VOLUME_NAME)
+
.withNewSecret().withSecretName(secret.getMetadata.getName).endSecret()
+ .endVolume()
+ .endSpec()
+ .build()
+ }.getOrElse(
+ driverServiceAccount.map { account =>
+ new PodBuilder(driverSpec.driverPod)
+ .editOrNewSpec()
+ .withServiceAccount(account)
+ .withServiceAccountName(account)
+ .endSpec()
+ .build()
+ }.getOrElse(driverSpec.driverPod)
+ )
+
+ val driverContainerWithMountedSecretVolume =
kubernetesCredentialsSecret.map { secret =>
+ new ContainerBuilder(driverSpec.driverContainer)
+ .addNewVolumeMount()
+ .withName(DRIVER_CREDENTIALS_SECRET_VOLUME_NAME)
+ .withMountPath(DRIVER_CREDENTIALS_SECRETS_BASE_DIR)
+ .endVolumeMount()
+ .build()
+ }.getOrElse(driverSpec.driverContainer)
+
+ driverSpec.copy(
+ driverPod = driverPodWithMountedKubernetesCredentials,
+ otherKubernetesResources =
+ driverSpec.otherKubernetesResources ++
kubernetesCredentialsSecret.toSeq,
+ driverSparkConf = driverSparkConfWithCredentialsLocations,
+ driverContainer = driverContainerWithMountedSecretVolume)
+ }
+
+ private def createCredentialsSecret(
+ driverOAuthTokenBase64: Option[String],
+ driverCaCertDataBase64: Option[String],
+ driverClientKeyDataBase64: Option[String],
+ driverClientCertDataBase64: Option[String]): Option[Secret] = {
+ val allSecretData =
+ resolveSecretData(
+ maybeMountedClientKeyFile,
+ driverClientKeyDataBase64,
+ DRIVER_CREDENTIALS_CLIENT_KEY_SECRET_NAME) ++
+ resolveSecretData(
+ maybeMountedClientCertFile,
+ driverClientCertDataBase64,
+ DRIVER_CREDENTIALS_CLIENT_CERT_SECRET_NAME) ++
+ resolveSecretData(
+ maybeMountedCaCertFile,
+ driverCaCertDataBase64,
+ DRIVER_CREDENTIALS_CA_CERT_SECRET_NAME) ++
+ resolveSecretData(
+ maybeMountedOAuthTokenFile,
+ driverOAuthTokenBase64,
+ DRIVER_CREDENTIALS_OAUTH_TOKEN_SECRET_NAME)
+
+ if (allSecretData.isEmpty) {
+ None
+ } else {
+ Some(new SecretBuilder()
+ .withNewMetadata()
+
.withName(s"$kubernetesResourceNamePrefix-kubernetes-credentials")
+ .endMetadata()
+ .withData(allSecretData.asJava)
+ .build())
+ }
+ }
+
+ private def setDriverPodKubernetesCredentialLocations(
+ driverSparkConf: SparkConf,
+ driverOauthTokenBase64: Option[String],
+ driverCaCertDataBase64: Option[String],
+ driverClientKeyDataBase64: Option[String],
+ driverClientCertDataBase64: Option[String]): SparkConf = {
+ val resolvedMountedOAuthTokenFile = resolveSecretLocation(
+ maybeMountedOAuthTokenFile,
+ driverOauthTokenBase64,
+ DRIVER_CREDENTIALS_OAUTH_TOKEN_PATH)
+ val resolvedMountedClientKeyFile = resolveSecretLocation(
+ maybeMountedClientKeyFile,
+ driverClientKeyDataBase64,
+ DRIVER_CREDENTIALS_CLIENT_KEY_PATH)
+ val resolvedMountedClientCertFile = resolveSecretLocation(
+ maybeMountedClientCertFile,
+ driverClientCertDataBase64,
+ DRIVER_CREDENTIALS_CLIENT_CERT_PATH)
+ val resolvedMountedCaCertFile = resolveSecretLocation(
+ maybeMountedCaCertFile,
+ driverCaCertDataBase64,
+ DRIVER_CREDENTIALS_CA_CERT_PATH)
+
+ val sparkConfWithCredentialLocations = driverSparkConf
+ .setOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CA_CERT_FILE_CONF_SUFFIX",
+ resolvedMountedCaCertFile)
+ .setOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CLIENT_KEY_FILE_CONF_SUFFIX",
+ resolvedMountedClientKeyFile)
+ .setOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$CLIENT_CERT_FILE_CONF_SUFFIX",
+ resolvedMountedClientCertFile)
+ .setOption(
+
s"$KUBERNETES_AUTH_DRIVER_MOUNTED_CONF_PREFIX.$OAUTH_TOKEN_FILE_CONF_SUFFIX",
+ resolvedMountedOAuthTokenFile)
+
+ // Redact all OAuth token values
+ sparkConfWithCredentialLocations
+ .getAll
+ .filter(_._1.endsWith(OAUTH_TOKEN_CONF_SUFFIX)).map(_._1)
+ .foreach {
+ sparkConfWithCredentialLocations.set(_, "<present_but_redacted>")
+ }
+ sparkConfWithCredentialLocations
+ }
+
+ private def safeFileConfToBase64(
+ conf: String,
+ fileNotFoundFormatString: String): Option[String] = {
+ submissionSparkConf.getOption(conf)
+ .map(new File(_))
+ .map { file =>
+ require(file.isFile, String.format(fileNotFoundFormatString,
file.getAbsolutePath))
+ BaseEncoding.base64().encode(Files.toByteArray(file))
+ }
+ }
+
+ private def resolveSecretLocation(
+ mountedUserSpecified: Option[String],
+ valueMountedFromSubmitter: Option[String],
+ mountedCanonicalLocation: String): Option[String] = {
+ mountedUserSpecified.orElse(valueMountedFromSubmitter.map( _ => {
--- End diff --
Done.
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