1--- 2layout: "guides" 3page_title: "Apache Spark Integration - Getting Started" 4sidebar_current: "guides-analytical-workloads-spark-pre" 5description: |- 6 Get started with the Nomad/Spark integration. 7--- 8 9# Getting Started 10 11To get started, you can use Nomad's example Terraform configuration to 12automatically provision an environment in AWS, or you can manually provision a 13cluster. 14 15## Provision a Cluster in AWS 16 17Nomad's [Terraform configuration](https://github.com/hashicorp/nomad/tree/master/terraform) 18can be used to quickly provision a Spark-enabled Nomad environment in 19 AWS. The embedded [Spark example](https://github.com/hashicorp/nomad/tree/master/terraform/examples/spark) 20 provides for a quickstart experience that can be used in conjunction with 21 this guide. When you have a cluster up and running, you can proceed to 22[Submitting applications](/guides/analytical-workloads/spark/submit.html). 23 24## Manually Provision a Cluster 25 26To manually configure provision a cluster, see the Nomad 27[Getting Started](/intro/getting-started/install.html) guide. There are two 28basic prerequisites to using the Spark integration once you have a cluster up 29and running: 30 31- Access to a [Spark distribution](https://nomad-spark.s3.amazonaws.com/spark-2.1.0-bin-nomad.tgz) 32built with Nomad support. This is required for the machine that will submit 33applications as well as the Nomad tasks that will run the Spark executors. 34 35- A Java runtime environment (JRE) for the submitting machine and the executors. 36 37The subsections below explain further. 38 39### Configure the Submitting Machine 40 41To run Spark applications on Nomad, the submitting machine must have access to 42the cluster and have the Nomad-enabled Spark distribution installed. The code 43snippets below walk through installing Java and Spark on Ubuntu: 44 45Install Java: 46 47```shell 48$ sudo add-apt-repository -y ppa:openjdk-r/ppa 49$ sudo apt-get update 50$ sudo apt-get install -y openjdk-8-jdk 51$ JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:bin/java::") 52``` 53 54Install Spark: 55 56 57```shell 58$ wget -O - https://nomad-spark.s3.amazonaws.com/spark-2.1.0-bin-nomad.tgz \ 59 | sudo tar xz -C /usr/local 60$ export PATH=$PATH:/usr/local/spark-2.1.0-bin-nomad/bin 61``` 62 63Export NOMAD_ADDR to point Spark to your Nomad cluster: 64 65```shell 66$ export NOMAD_ADDR=http://NOMAD_SERVER_IP:4646 67``` 68 69### Executor Access to the Spark Distribution 70 71When running on Nomad, Spark creates Nomad tasks to run executors for use by the 72application's driver program. The executor tasks need access to a JRE, a Spark 73distribution built with Nomad support, and (in cluster mode) the Spark 74application itself. By default, Nomad will only place Spark executors on client 75nodes that have the Java runtime installed (version 7 or higher). 76 77In this example, the Spark distribution and the Spark application JAR file are 78being pulled from Amazon S3: 79 80```shell 81$ spark-submit \ 82 --class org.apache.spark.examples.JavaSparkPi \ 83 --master nomad \ 84 --deploy-mode cluster \ 85 --conf spark.executor.instances=4 \ 86 --conf spark.nomad.sparkDistribution=https://nomad-spark.s3.amazonaws.com/spark-2.1.0-bin-nomad.tgz \ 87 https://nomad-spark.s3.amazonaws.com/spark-examples_2.11-2.1.0-SNAPSHOT.jar 100 88``` 89 90### Using a Docker Image 91 92An alternative to installing the JRE on every client node is to set the 93[spark.nomad.dockerImage](/guides/analytical-workloads/spark/configuration.html#spark-nomad-dockerimage) 94 configuration property to the URL of a Docker image that has the Java runtime 95installed. If set, Nomad will use the `docker` driver to run Spark executors in 96a container created from the image. The 97[spark.nomad.dockerAuth](/guides/analytical-workloads/spark/configuration.html#spark-nomad-dockerauth) 98 configuration property can be set to a JSON object to provide Docker repository 99 authentication configuration. 100 101When using a Docker image, both the Spark distribution and the application 102itself can be included (in which case local URLs can be used for `spark-submit`). 103 104Here, we include [spark.nomad.dockerImage](/guides/analytical-workloads/spark/configuration.html#spark-nomad-dockerimage) 105and use local paths for 106[spark.nomad.sparkDistribution](/guides/analytical-workloads/spark/configuration.html#spark-nomad-sparkdistribution) 107and the application JAR file: 108 109```shell 110$ spark-submit \ 111 --class org.apache.spark.examples.JavaSparkPi \ 112 --master nomad \ 113 --deploy-mode cluster \ 114 --conf spark.nomad.dockerImage=rcgenova/spark \ 115 --conf spark.executor.instances=4 \ 116 --conf spark.nomad.sparkDistribution=/spark-2.1.0-bin-nomad.tgz \ 117 /spark-examples_2.11-2.1.0-SNAPSHOT.jar 100 118``` 119 120## Next Steps 121 122Learn how to [submit applications](/guides/analytical-workloads/spark/submit.html). 123