Installing Cloudera Data Science Workbench 1.6.x Using Cloudera Manager

Before you begin installing Cloudera Data Science Workbench, make sure you have completed the steps to secure your hosts, set up DNS subdomains, and configure block devices.

1. (CDH 5 Only) Install and configure the CDS 2.x Powered by Apache Spark parcel and CSD. For instructions, see Installing CDS 2.x Powered by Apache Spark.

2. (Required for CDH 5 and CDH 6) To be able to use Spark 2, each user must have their own /home directory in HDFS. If you sign in to Hue first, these directories will automatically be created for you. Alternatively, you can have cluster administrators create these directories.

   hdfs dfs -mkdir /user/<username>
   hdfs dfs -chown <username>:<username> /user/<username>

   If you are using CDS 2.3 release 2 (or higher), review the associated known issues here: CDS Powered By Apache Spark.

3. Test Spark 2 integration on the gateway hosts.

   1. SSH to a gateway host.
   2. If your cluster is kerberized, run kinit to authenticate to the CDH cluster’s Kerberos Key Distribution Center. The Kerberos ticket you create is not visible to Cloudera Data Science Workbench users.

   3. Submit a test job to Spark by executing the following command:

      CDH 5

      spark2-submit --class org.apache.spark.examples.SparkPi --master yarn \
      --deploy-mode client /opt/cloudera/parcels/SPARK2/lib/spark2/examples/jars/spark-example*.jar 100

      To view a sample command, click

      spark2-submit --class org.apache.spark.examples.SparkPi --master yarn \
      --deploy-mode client /opt/cloudera/parcels/SPARK2/lib/spark2/examples/jars/spark-examples*.jar 100

      CDH 6

      spark-submit --class org.apache.spark.examples.SparkPi --master yarn \
      --deploy-mode client SPARK_HOME/lib/spark-examples*.jar 100

      To view a sample command, click

      spark-submit --class org.apache.spark.examples.SparkPi --master yarn \
      --deploy-mode client /opt/cloudera/parcels/CDH/lib/spark/examples/jars/spark-examples*.jar 100

   4. View the status of the job in the CLI output or in the Spark web UI to confirm that the host you want to use for the Cloudera Data Science Workbench master functions properly as a Spark gateway.

      To view sample CLI output, click

      19/02/15 09:37:39 INFO spark.SparkContext: Running Spark version 2.4.0-cdh6.1.0
      19/02/15 09:37:39 INFO spark.SparkContext: Submitted application: Spark Pi
      ...
      19/02/15 09:37:40 INFO util.Utils: Successfully started service 'sparkDriver' on port 37050.
      ...
      19/02/15 09:38:06 INFO scheduler.DAGScheduler: Job 0 finished: reduce at SparkPi.scala:38, took 18.659033 s

On CSD-based deployments, Cloudera Manager automatically detects the path and version of Java installed on Cloudera Data Science Workbench gateway hosts. You do not need to explicitly set the value for JAVA_HOME unless you want to use a custom location, use JRE, or (in the case of Spark 2) force Cloudera Manager to use JDK 1.8 as explained below.

Setting a value for JAVA_HOME - The value for JAVA_HOME depends on whether you are using JDK or JRE. For example, if you're using JDK 1.8_162, set JAVA_HOME to /usr/java/jdk1.8.0_162. If you are only using JRE, set it to /usr/java/jdk1.8.0_162/jre.

Issues with Spark 2.2 and higher - Spark 2.2 (and higher) requires JDK 1.8. However, if a host has both JDK 1.7 and JDK 1.8 installed, Cloudera Manager might choose to use JDK 1.7 over JDK 1.8. If you are using Spark 2.2 (or higher), this will create a problem during the first run of the service because Spark will not work with JDK 1.7. To work around this, explicitly configure Cloudera Manager to use JDK 1.8 on the gateway hosts that are running Cloudera Data Science Workbench.

For instructions on how to set JAVA_HOME, see Configuring a Custom Java Home Location in Cloudera Manager.

To upgrade the whole CDH cluster to JDK 1.8, see Upgrading to JDK 1.8.

1. Download the Cloudera Data Science Workbench CSD. Make sure you download the CSD that corresponds to the version of CDH you are using.

   Version	Link to CSD
   Cloudera Data Science Workbench 1.6.1	CDH 6 - CLOUDERA_DATA_SCIENCE_WORKBENCH_CDH6_1.6.1.jar
   	CDH 5 - CLOUDERA_DATA_SCIENCE_WORKBENCH_CDH5_1.6.1.jar
   Cloudera Data Science Workbench 1.6.0	CDH 6 - CLOUDERA_DATA_SCIENCE_WORKBENCH_CDH6_1.6.0.jar
   	CDH 5 - CLOUDERA_DATA_SCIENCE_WORKBENCH_CDH5_1.6.0.jar

2. Log on to the Cloudera Manager Server host, and place the CSD file under /opt/cloudera/csd, which is the default location for CSD files. To configure a custom location for CSD files, refer to the Cloudera Manager documentation at Configuring the Location of Custom Service Descriptor Files.
3. Set the file ownership to cloudera-scm:cloudera-scm with permission 644.
   Set the file ownership:

   chown cloudera-scm:cloudera-scm CLOUDERA_DATA_SCIENCE_WORKBENCH-CDH<X>-1.6.<Y>.jar

   Set the file permissions:

   chmod 644 CLOUDERA_DATA_SCIENCE_WORKBENCH-CDH<X>-1.6.<Y>.jar

4. Restart the Cloudera Manager Server:

   service cloudera-scm-server restart

5. Log into the Cloudera Manager Admin Console and restart the Cloudera Management Service:
   1. Select Clusters > Cloudera Management Service.
   2. Select Actions > Restart.

Perform the following steps to add the Cloudera Data Science Workbench service to your cluster:

1. Log into the Cloudera Manager Admin Console.
2. On the Home > Status tab, click to the right of the cluster name and select Add a Service to launch the wizard. A list of services will be displayed.
3. Select the Cloudera Data Science Workbench service and click Continue.
4. Select the services which the new CDSW service should depend on. At a minimum, the HDFS, Spark 2, and YARN services are required for the CDSW service to run successfully. Click Continue.

   (Required for CDH 6) If you want to run SparkSQL workloads, you must also add the Hive service as a dependency.

5. Assign the Cloudera Data Science Workbench roles, HDFS, Spark 2, and YARN, to gateway hosts.

6. Master

   Assign the Master role to a gateway host that is the designated Master host. This is the host that should have the Application Block Device mounted to it.

   Worker

   Assign the Worker role to any other gateway hosts that will be used for Cloudera Data Science Workbench. Note that Worker hosts are not required for a fully-functional Cloudera Data Science Workbench deployment. For proof-of-concept deployments, you can deploy a 1-host cluster with just a Master host. The Master host can run user workloads just as a worker host can.

   Even if you are setting up a multi-host deployment, do not assign the Master and Worker roles to the same host. By default, the Master host doubles up to perform both functions: those of the Master, outlined here, and those of a worker.

   Docker Daemon

   This role runs underlying Docker processes on all Cloudera Data Science Workbench hosts. The Docker Daemon role must be assigned to every Cloudera Data Science Workbench gateway host.

   On First Run, Cloudera Manager will automatically assign this role to each Cloudera Data Science Workbench gateway host. However, if any more hosts are added or reassigned to Cloudera Data Science Workbench, you must explicitly assign the Docker Daemon role to them.

   Application

   This role runs the Cloudera Data Science Workbench application. This role runs only on the CDSW Master host.

   On First Run, Cloudera Manager will assign the Application role to the host running the Cloudera Data Science Workbench Master role. The Application role is always assigned to the same host as the Master. Consequently, this role must never be assigned to a Worker host.

   The following image shows the role assignments for a Cloudera Data Science Workbench Master host and Worker host:
   
   
   
   
7. Configure the following parameters and click Continue.

   Properties	Description
   Cloudera Data Science Workbench Domain	DNS domain configured to point to the master host. If the previously configured DNS subdomain entries are cdsw.<your_domain>.com and *.cdsw.<your_domain>.com, then this parameter should be set to cdsw.<your_domain>.com. Users' browsers contact the Cloudera Data Science Workbench web application at http://cdsw.<your_domain>.com. This domain for DNS only and is unrelated to Kerberos or LDAP domains.
   Master Node IPv4 Address	IPv4 address for the master host that is reachable from the worker host. By default, this field is left blank and Cloudera Manager uses the IPv4 address of the Master host. Within an AWS VPC, set this parameter to the internal IP address of the master host; for instance, if your hostname is ip-10-251-50-12.ec2.internal, set this property to the corresponding IP address, 10.251.50.12.
   Install Required Packages	When this parameter is enabled, the Prepare Node command will install all the required package dependencies on First Run. If you choose to disable this property, you must manually install the following packages on all gateway hosts running Cloudera Data Science Workbench roles: nfs-utils libseccomp lvm2 bridge-utils libtool-ltdl iptables rsync policycoreutils-python selinux-policy-base selinux-policy-targeted ntp ebtables bind-utils nmap-ncat openssl e2fsprogs redhat-lsb-core conntrack-tools socat
   Docker Block Device	Block device(s) for Docker images. Use the full path to specify the image(s), for instance, /dev/xvde. The Cloudera Data Science Workbench installer will format and mount Docker on each gateway host that is assigned the Docker Daemon role. Do not mount these block devices prior to installation.

8. The wizard will now begin a First Run of the Cloudera Data Science Workbench service. This includes deploying client configuration for HDFS, YARN and Spark 2, installing the package dependencies on all hosts, and formatting the Docker block device. The wizard will also assign the Application role to the host running Master and the Docker Daemon role to all the gateway hosts running Cloudera Data Science Workbench.
9. Once the First Run command has completed successfully, click Finish to go back to the Cloudera Manager home page.

After your installation is complete, set up the initial administrator account. Go to the Cloudera Data Science Workbench web application at http://cdsw.<your_domain>.com.

You must access Cloudera Data Science Workbench from the Cloudera Data Science Workbench Domain configured when setting up the service, and not the hostname of the master host. Visiting the hostname of the master host will result in a 404 error.

The first account that you create becomes the site administrator. You may now use this account to create a new project and start using the workbench to run data science workloads. For a brief example, see Getting Started with the Cloudera Data Science Workbench.

You can also start using the product by configuring your personal account and creating a new project. For a quickstart that walks you through creating and running a simple template project, see Getting Started with Cloudera Data Science Workbench. For more details on collaborating with teams, working on projects, and sharing results, see the Managing Cloudera Data Science Workbench Users.