I am trying to automatically launch a Spark job on an HDInsight cluster from Microsoft Azure. I am aware that several methods exist to automate Hadoop job submission (provided by Azure itself), but so far I have not been able to found a way to remotely run a Spark job withouth setting a RDP with the master instance.
Is there any way to achieve this?
Spark-jobserver provides a RESTful interface for submitting and managing Apache Spark jobs, jars, and job contexts.
https://github.com/spark-jobserver/spark-jobserver
My solution is using both Scheduler and Spark-jobserver to launch the Spark-job periodically.
At the moment of this writing, it seems there is no official way of achieving this. So far, however, I have been able to somehow remotely run Spark jobs using an Oozie shell workflow. It is nothing but a patch, but so far it has been useful for me. These are the steps I have followed:
<workflow-app name="myWorkflow" xmlns="uri:oozie:workflow:0.2">
<start to = "myAction"/>
<action name="myAction">
<shell xmlns="uri:oozie:shell-action:0.2">
<job-tracker>${jobTracker}</job-tracker>
<name-node>${nameNode}</name-node>
<configuration>
<property>
<name>mapred.job.queue.name</name>
<value>${queueName}</value>
</property>
</configuration>
<exec>myScript.cmd</exec>
<file>wasb://[email protected]/myScript.cmd#myScript.cmd</file>
<file>wasb://[email protected]/mySpark.jar#mySpark.jar</file>
</shell>
<ok to="end"/>
<error to="fail"/>
</action>
<kill name="fail">
<message>Shell action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
</kill>
<end name="end"/>
</workflow-app>
Note that it is not possible to identify on which HDInsight node is going to be executed the script, so it is necessary to put it, along with the Spark application .jar, on the wasb repository. It is then redirectioned to the local directory on which the Oozie job is executing.
C:\apps\dist\spark-1.2.0\bin\spark-submit --class spark.azure.MainClass
--master yarn-cluster
--deploy-mode cluster
--num-executors 3
--executor-memory 2g
--executor-cores 4
mySpark.jar
It is necessary to upload both the .cmd and the Spark .jar to the wasb repository (a process that it is not included in this answer), concretely to the direction pointed in the workflow:
wasb://[email protected]/
The powershell script is very much taken from the official Oozie on HDInsight tutorial. I am not including the script on this answer due to its almost absolute sameness with my approach.
I have made a new suggestion on the azure feedback portal indicating the need of official support for remote Spark job submission.
Updated on 8/17/2016: Our spark cluster offering now includes a Livy server that provides a rest service to submit a spark job. You can automate spark job via Azure Data Factory as well.
Original post: 1) Remote job submission for spark is currently not supported.
2) If you want to automate setting a master every time ( i.e. adding --master yarn-client every time you execute), you can set the value in %SPARK_HOME\conf\spark-defaults.conf file with following config:
spark.master yarn-client
You can find more info on spark-defaults.conf on apache spark website.
3) Use cluster customization feature if you want to add this automatically to spark-defaults.conf file at deployment time.
