Details
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Bug
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Status: Resolved
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Minor
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Resolution: Fixed
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3.0.0
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None
Description
I tried Kerberos authentication with Kubernetes Resource Manager and an external Hadoop and KDC.
I tested built on 6c9c84f (master + SPARK-23257).
$ 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=test@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
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:
$ kubectl get secrets spark-hdfs-1542613661459-delegation-tokens -o jsonpath='{.data.hadoop-tokens}' | {base64 -d | cat -A; echo;}
HDTS^@^@^@
The result of "kubectl get secrets" should be like folloing(I masked the actual result):
HDTS^@^ha-hdfs:test^@^_test@EXTERNAL.KERBEROS.REALM.COM^@^XXXX@
As a result, spark-driver threw GSSException for each access of HDFS.
Full logs(submit, driver, executor) are attached.
Attachments
Attachments
Issue Links
- relates to
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SPARK-25815 Kerberos Support in Kubernetes resource manager (Client Mode)
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- Resolved
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