Stavros Kontopoulos created SPARK-23857:
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Summary: In mesos cluster mode keytab Spark submit requires the
keytab to be available on the local file system.
Key: SPARK-23857
URL: https://issues.apache.org/jira/browse/SPARK-23857
Project: Spark
Issue Type: Bug
Components: Mesos
Affects Versions: 2.3.0
Reporter: Stavros Kontopoulos
Users could submit their jobs from an external to the cluster host which may
not have the required keytab locally. Moreover, in cluster mode it does not
make much sense to reference a local resource unless this is uploaded/stored
somewhere in the cluster. For yarn HDFS is used, on mesos and certainly on
DC/OS right now the secret store is used for storing secrets and consequently
keytabs. There is a check
[here|https://github.com/apache/spark/blob/7cf9fab33457ccc9b2d548f15dd5700d5e8d08ef/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L387]
that makes spark submit difficult to use in such deployment scenarios. On
DC/OS the workaround is to directly submit to the mesos dispatcher rest api by
passing the spark.yarn.tab property pointing to a path within that container
where the keytab will be mounted after its fetched from the secret store.
Target is to allow spark submit be flexible enough for mesos in cluster mode,
as DC/OS users often want to deploy using that.
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