Github user skonto commented on a diff in the pull request:
https://github.com/apache/spark/pull/21669#discussion_r199806583
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/Constants.scala
---
@@ -81,4 +83,35 @@ private[spark] object Constants {
val KUBERNETES_MASTER_INTERNAL_URL = "https://kubernetes.default.svc";
val DRIVER_CONTAINER_NAME = "spark-kubernetes-driver"
val MEMORY_OVERHEAD_MIN_MIB = 384L
+
+ // Hadoop Configuration
+ val HADOOP_FILE_VOLUME = "hadoop-properties"
+ val HADOOP_CONF_DIR_PATH = "/etc/hadoop/conf"
+ val ENV_HADOOP_CONF_DIR = "HADOOP_CONF_DIR"
+ val HADOOP_CONF_DIR_LOC = "spark.kubernetes.hadoop.conf.dir"
+ val HADOOP_CONFIG_MAP_SPARK_CONF_NAME =
+ "spark.kubernetes.hadoop.executor.hadoopConfigMapName"
+
+ // Kerberos Configuration
+ val KERBEROS_DELEGEGATION_TOKEN_SECRET_NAME =
+ "spark.kubernetes.kerberos.delegation-token-secret-name"
+ val KERBEROS_KEYTAB_SECRET_NAME =
+ "spark.kubernetes.kerberos.key-tab-secret-name"
+ val KERBEROS_KEYTAB_SECRET_KEY =
+ "spark.kubernetes.kerberos.key-tab-secret-key"
+ val KERBEROS_SPARK_USER_NAME =
+ "spark.kubernetes.kerberos.spark-user-name"
+ val KERBEROS_SECRET_LABEL_PREFIX =
+ "hadoop-tokens"
+ val SPARK_HADOOP_PREFIX = "spark.hadoop."
+ val HADOOP_SECURITY_AUTHENTICATION =
+ SPARK_HADOOP_PREFIX + "hadoop.security.authentication"
+
+ // Kerberos Token-Refresh Server
+ val KERBEROS_REFRESH_LABEL_KEY = "refresh-hadoop-tokens"
--- End diff --
I left a comment also in the design doc, can we also provide the option for
using an existing renewal service like when integrating with an external hadoop
cluster where people already have that. This is how it worked for mesos so far.
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