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https://issues.apache.org/jira/browse/SPARK-26125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16701200#comment-16701200
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Marcelo Vanzin commented on SPARK-26125:
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Pretty sure this works with my patch for SPARK-25815, but since this is a
different bug from that one, will keep it separate (and close together).
> Delegation Token seems not appropriately stored on secrets of
> Kubernetes/Kerberized HDFS
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-26125
> URL: https://issues.apache.org/jira/browse/SPARK-26125
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes
> Affects Versions: 3.0.0
> Reporter: Kei Kori
> Priority: Minor
> Attachments: spark-submit-stern.log
>
>
> I tried Kerberos authentication with Kubernetes Resource Manager and an
> external Hadoop and KDC.
> I tested built on
> [6c9c84f|https://github.com/apache/spark/commit/6c9c84ffb9c8d98ee2ece7ba4b010856591d383d]
> (master + SPARK-23257).
> {code}
> $ bin/spark-submit \
> --deploy-mode cluster \
> --class org.apache.spark.examples.HdfsTest \
> --master k8s://https://master01.node:6443 \
> --conf spark.kubernetes.authenticate.driver.serviceAccountName=spark \
> --conf spark.app.name=spark-hdfs \
> --conf spark.executer.instances=1 \
> --conf
> spark.kubernetes.container.image=docker-registry/kkori/spark:6c9c84f \
> --conf spark.kubernetes.kerberos.enabled=true \
> --conf spark.kubernetes.kerberos.krb5.configMapName=krb5-conf \
> --conf spark.kubernetes.kerberos.keytab=/tmp/test.keytab \
> --conf
> spark.kubernetes.kerberos.principal=t...@external.kerberos.realm.com \
> --conf spark.kubernetes.hadoop.configMapName=hadoop-conf \
> local:///opt/spark/examples/jars/spark-examples_2.11-3.0.0-SNAPSHOT.jar
> {code}
> I successfully submitted into Kubernetes RM and Kubernetes spawned
> spark-driver and executors,
> but Hadoop Delegation Token seems wrongly stored into Kubernetes secrets,
> since that contains only header like below:
> {code}
> $ kubectl get secrets spark-hdfs-1542613661459-delegation-tokens -o
> jsonpath='{.data.hadoop-tokens}' | {base64 -d | cat -A; echo;}
> HDTS^@^@^@
> {code}
> The result of "kubectl get secrets" should be like folloing(I masked the
> actual result):
> {code}
> HDTS^@^ha-hdfs:test^@^_t...@external.kerberos.realm.com^@^XXXX@
> {code}
> As a result, spark-driver threw GSSException for each access of HDFS.
> Full logs(submit, driver, executor) are attached.
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