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Hortonworks Data Platform (HDP)

Before installing, ensure to check and complete the installation requirements. Follow the below instructions to download, install, and set up Unravel for the HDP platform.

Notice

The following instructions are for a single cluster environment. For installing Unravel on a multi-cluster environment, refer to Multi-cluster install.

1. Download Unravel
2. Deploy Unravel binaries

Unravel binaries are available as a tar file or RPM package. You can deploy the Unravel binaries in any directory on the server. However, the user who installs Unravel must have the write permissions to the directory where the Unravel binaries are deployed.

If the binaries are deployed to <Unravel_installation_directory>, Unravel will be available in <Unravel_installation_directory>/unravel. The directory layout for both the Tar and RPM will be unravel/versions/<Directories and files>.

Option 1: Deploy Unravel from a tar file

The following steps to deploy Unravel from a tar file must be performed by a user, who will run Unravel.

  1. Create an Installation directory.

    mkdir /path/to/installation/directory

    For example: mkdir /opt/unravel

    Note

    Some locations may require root access to create a directory. In such a case, after the directory is created, change the ownership to unravel user and continue with the installation procedure as the unravel user. 

    chown -R username:groupname /path/to/installation/directory

    For example: chown -R unravel:unravelgroup /opt/unravel

  2. Extract and copy the Unravel tar file to the installation directory, which was created in the first step. After you extract the contents of the tar file, unravel directory is created within the installation directory.

    tar -zxf unravel-<version>tar.gz -C /<Unravel-installation-directory>

    For example: tar -zxf unravel-4.7.x.x.tar.gz -C /opt The Unravel directory will be available within /opt

Option 2: Deploy Unravel from an RPM package

Important

The following steps, to deploy Unravel from an RPM package, should be performed by a root user. After the RPM package is deployed, the remaining installation procedures should be performed by the unravel user.

  1. Create an installation directory.

    mkdir /usr/local/unravel

  2. Grant ownership of the directory to a user who runs Unravel. This user executes all the processes involved in Unravel installation.

    chown -R username:groupname /user/local/unravel

    For example: chown -R unravel:unravelgroup /usr/local/unravel The Unravel directory is available in /user/local.

  3. Run the following command:

    rpm -i unravel-<version>.rpm

    For example: rpm -i unravel-4.7.x.x.rpm

    In case you want to provide a different location, you can do so by using the --prefix command. For example:

    mkdir /opt/unravel
chown -R username:groupname /opt/unravel
rpm -i unravel-4.7.0.0.rpm --prefix /opt

    The Unravel directory is available in /opt.

  4. Continue with the installation procedures as Unravel user.

3. Run the setup

You can run the setup command to install Unravel. The setup command allows you to do the following:

  • Runs Precheck automatically to detect possible issues that prevent a successful installation. Suggestions are provided to resolve issues. Refer to Precheck filters for the expected value for each filter.

  • Let you run extra parameters to integrate the database of your choice.

    The setup command allows you to use a managed database shipped with Unravel or an external database. The setup uses the Unravel managed PostgreSQL database when run without any additional parameters. Otherwise, you can specify one of the following types of databases in the setup command:

    • MySQL (Unravel managed as well as external MySQL database)

    • MariaDB (Unravel managed as well as external MariaDB database)

    • PostgreSQL (External PostgreSQL)

    Refer to Integrate database for details.

  • Let you specify a separate path for the data directory other than the default path.

    You can locate the Unravel data and configurations in the data directory. By default, the installer maintains the data directory under <Unravel installation directory>/data. You can also change the data directory's default location by running additional parameters with the setup command. To install Unravel with the setup command.

  • Provides more setup options.

Notice

The Unravel user who owns the installation directory should run the setup command to install Unravel.

To install Unravel with the setup command, do the following:

  1. Switch to Unravel user.

      su - <unravel user>

  2. Run setup command:

    Note

    Refer to setup Options for all the additional parameters that you can run with the setup command

    Refer to Integrate database topic and complete the pre-requisites before running the setup command with any other database other than Unravel managed PostgreSQL, which is shipped with the product. Extra parameters must be passed with the setup command when using another database.

    Tip

    Optionally, if you want to provide a different data directory, you can pass an extra parameter (--data-directory) with the setup command as follows:

    <unravel_installation_directory>/unravel/versions/<Unravel version>/setup --data-directory /the/data/directory

    Similarly, you can configure separate directories for other unravel directories —contact support for assistance.

    • PostgreSQL

      • Unravel managed PostgreSQL

        <unravel_installation_directory>/unravel/versions/<Unravel version>/setup

      • External PostgreSQL

        <unravel_installation_directory>/unravel/versions/<Unravel version>/setup --external-database postgresql <HOST> <PORT> <SCHEMA> <USERNAME> <PASSWORD>

        The HOST, PORT, SCHEMA, USERNAME, and PASSWORD are optional fields and are prompted if missing. For example: /opt/unravel/versions/abcd.992/setup --external-database postgresql xyz.unraveldata.com 5432 unravel_db_prod unravel unraveldata

    • MySQL

      • Unravel managed MySQL

        <unravel_installation_directory>/unravel/versions/<Unravel version>/setup --extra /tmp/mysql

      • External MySQL

        <unravel_installation_directory>/unravel/versions/<Unravel version>/setup --extra /tmp/<MySQL-directory> --external-database mysql <HOST> <PORT> <SCHEMA> <USERNAME> <PASSWORD>

        The HOST, PORT, SCHEMA, USERNAME, and PASSWORD are optional fields and are prompted if missing.

    • MariaDB

      • Unravel managed MariaDB

        <unravel_installation_directory>/unravel/versions/<Unravel version>/setup --extra /tmp/mariadb

      • External MariaDB

        <unravel_installation_directory>unravel/versions/<Unravel version>/setup --extra /tmp/<MariaDB-directory> --external-database mariadb <HOST> <PORT> <SCHEMA> <USERNAME> <PASSWORD>

        The HOST, PORT, SCHEMA, USERNAME, and PASSWORD are optional fields and are prompted if missing.

    Precheck is automatically run when you run the setup command. Refer to Precheck filters for the expected value for each filter.

  3. Apply the changes.

    <Unravel installation directory>/unravel/manager config apply

  4. Start all the services.

    <unravel_installation_directory>/unravel/manager start

  5. Check the status of services.

    <unravel_installation_directory>/unravel/manager report

    The following service statuses are reported:

    • OK: Service is up and running.

    • Not Monitored: Service is not running. (Has stopped or has failed to start)

    • Initializing: Services are starting up.

    • Does not exist: The process unexpectedly disappeared. A restart will be attempted ten times.

    You can also get the status and information for a specific service. Run the manager report command as follows:

    <unravel_installation_directory>/unravel/manager report <service>

    For example: /opt/unravel/manager report auto_action

Precheck

The Precheck output displays the issues that prevent a successful installation and provides suggestions to resolve them. You must resolve each of the issues before proceeding. See Precheck filters.

After resolving the precheck issues, you must re-login or reload the shell to execute the setup command again.

Note

You can skip the precheck using the setup --skip-precheck command in certain situations.

For example:

/opt/unravel/versions/<Unravel version>/setup --skip-precheck

You can also skip the checks that you know can fail. For example, if you want to skip the Check limits option and the Disk freespace option, pick the command within the parenthesis corresponding to these failed options and run the setup command as follows:

setup --filter-precheck ~check_limits,~check_freespace

Tip

Run --help with the setup command and any combination of the setup command for complete usage details.

<unravel_installation_directory>/unravel/versions/<Unravel version>/setup --help
Precheck filters
Setup Options
Precheck Sample
/opt/unravel/versions/abcd.1004/setup 
2021-04-05 15:51:30 Sending logs to: /tmp/unravel-setup-20210405-155130.log
2021-04-05 15:51:30 Running preinstallation check...
2021-04-05 15:51:31 Gathering information ................. Ok
2021-04-05 15:51:51 Running checks .................. Ok
--------------------------------------------------------------------------------
system
 Check limits        : PASSED
 Clock sync          : PASSED
 CPU requirement     : PASSED, Available cores: 8 cores
 Disk access         : PASSED, /opt/unravel/versions/develop.1004/healthcheck/healthcheck/plugins/system is writable
 Disk freespace      : PASSED, 229 GB of free disk space is available for precheck dir.
 Kerberos tools      : PASSED
 Memory requirement  : PASSED, Available memory: 79 GB
 Network ports       : PASSED
 OS libraries        : PASSED
 OS release          : PASSED, OS release version: centos 7.6
 OS settings         : PASSED
 SELinux             : PASSED
--------------------------------------------------------------------------------
Healthcheck report bundle: /tmp/healthcheck-20210405155130-xyz.unraveldata.com.tar.gz
2021-04-05 15:51:53 Prepare to install with: /opt/unravel/versions/abcd.1004/installer/installer/../installer/conf/presets/default.yaml
2021-04-05 15:51:57 Sending logs to: /opt/unravel/logs/setup.log
2021-04-05 15:51:57 Instantiating templates ................................................................................................................................................................................................................................ Ok
2021-04-05 15:52:05 Creating parcels .................................... Ok
2021-04-05 15:52:20 Installing sensors file ............................ Ok
2021-04-05 15:52:20 Installing pgsql connector ... Ok
2021-04-05 15:52:22 Starting service monitor ... Ok
2021-04-05 15:52:27 Request start for elasticsearch_1 .... Ok
2021-04-05 15:52:27 Waiting for elasticsearch_1 for 120 sec ......... Ok
2021-04-05 15:52:35 Request start for zookeeper .... Ok
2021-04-05 15:52:35 Request start for kafka .... Ok
2021-04-05 15:52:35 Waiting for kafka for 120 sec ...... Ok
2021-04-05 15:52:37 Waiting for kafka to be alive for 120 sec ..... Ok
2021-04-05 15:52:42 Initializing pgsql ... Ok
2021-04-05 15:52:46 Request start for pgsql .... Ok
2021-04-05 15:52:46 Waiting for pgsql for 120 sec ..... Ok
2021-04-05 15:52:47 Creating database schema ................. Ok
2021-04-05 15:52:50 Generating hashes .... Ok
2021-04-05 15:52:52 Loading elasticsearch templates ............ Ok
2021-04-05 15:52:55 Creating kafka topics .................... Ok
2021-04-05 15:53:36 Creating schema objects ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Ok
2021-04-05 15:54:03 Request stop ....................................................... Ok
2021-04-05 15:54:16 Done
[unravel@xyz ~]$
4. Add configurations

  1. Run manager config auto command to automatically pull in all the Hadoop configurations. You will be prompted to provide the location and credentials for Cloudera Manager or Ambari UI.

    <unravel_installation_directory>/unravel/manager config auto

    If there are more than one clusters that are handled by Cloudera Manager or Ambari, you will be prompted to enable the cluster that you want to monitor. Run the following command to enable a cluster. 

    <unravel_installation_directory>/unravel/manager config cluster enable <CLUSTER_KEY>

    Example: /opt/unravel/manager config cluster enable cluster1

    Tip

    Here <CLUSTER_KEY> is the name of the cluster that you want to enable for Unravel monitoring. This can be retrieved from the output shown for the manager config auto command.

  2. The Hive metastore database password can be recovered automatically only for a cluster manager with an administrative account. Otherwise, it must be set manually as follows:

    <Unravel installation directory>/unravel/manager config hive metastore password <CLUSTER_KEY> <HIVE_KEY> <PASSWORD>

    Example: /opt/unravel/manager config hive metastore password cluster1 HIVE p@P@SsWorD

    Tip

    Here <CLUSTER_KEY> is the name of the cluster where you want to set the Hive configurations.

    Also, refer to Connecting to Hive metastore in a single cluster environment.

  3. Optional: Set up Kerberos to authenticate Hadoop services.

    • If you are using Kerberos authentication, set the principal path and keytab, enable Kerberos authentication, and apply the changes.

      <Unravel installation directory>/unravel/manager config kerberos set --keytab </path/to/keytab file> --principal <server@example.com>
<Unravel installation directory>/unravel/manager config kerberos enable
<unravel_installation_directory>/manager config apply

    • If you are using Truststore certificates, run the following steps from the manager tool to add certificates to the Truststore:

      1. Download the certificates to a directory.

      2. Provide permissions to the user, who installs unravel, to access the certificates directory.

        chown -R username:groupname /path/to/certificates/directory

      3. Upload the certificates.

        ## Option 1
<unravel_installation_directory>/unravel/manager config tls trust add </path/to/the/certificate/files

or 

## Option 2
<unravel_installation_directory>/unravel/manager config tls trust add --pem </path/to/the/certificate/files>
<unravel_installation_directory>/unravel/manager config tls trust add --jks </path/to/the/certificate/files>
<unravel_installation_directory>/unravel/manager config tls trust add --pkcs12 </path/to/the/certificate/files>

      4. Enable the Truststore

        <unravel_installation_directory>/unravel/manager config tls trust <enable|disable>
<unravel_installation_directory>/unravel/manager config apply

      5. Verify the connection.

        <unravel_installation_directory>/unravel/manager verify connect <Cluster Manager-host> <Cluster Manager-port>

        For example:

        /opt/unravel/manager verify connect xyz.unraveldata.com 7180
-- Running: verify connect xyz.unraveldata.com 7180
 - Resolved IP: 111.17.4.123
 - Reverse lookup: ('xyz.unraveldata.com', [], ['111.17.4.123'])
 - Connection:   OK
 - TLS:      No
-- OK

    • If you are using TLS protocol, refer to Enabling Transport Layer Security (TLS) for Unravel UI.Enabling Transport Layer Security (TLS) for Unravel UI

  4. Apply changes. 

    <unravel_installation_directory>/unravel/manager config apply

  5. Start all the services.

    <unravel_installation_directory>/unravel/manager start

  6. Check the status of services.

    <unravel_installation_directory>/unravel/manager report

    The following service statuses are reported:

    • OK: Service is up and running

    • Not Monitored: Service is not running. (Has stopped or has failed to start)

    • Initializing: Services are starting up.

    • Does not exist: The process unexpectedly disappeared. Restarts will be attempted 10 times.

    You can also get the status and information for a specific service. Run the manager report command as follows:

    <unravel_installation_directory>/unravel/manager report <service>

    For example: /opt/unravel/manager report auto_action

  7. Enable additional instrumentation. (CDH, CDP)

  8. Set additional configurations, if required.

  9. Optionally, you can run healthcheck, at this point, to verify that all the configurations and services are running successfully.

    <unravel_installation_directory>/unravel/manager healthcheck

    Healthcheck is run automatically on an hourly basis in the backend. You can set your email to receive the healthcheck reports.

Enable additional instrumentation for HDP

This topic explains how to configure Unravel to retrieve additional data from Hive, Tez, Spark, and Oozie, such as Hive queries, application timelines, Spark jobs, YARN resource management data, and logs. You can do this by generating Unravel's JARs and distributing them to every node that runs queries in the cluster. Later, after the JARs are distributed to the nodes, you can integrate Hive, Tez, and Spark data with Unravel.

1. Generate and distribute Unravel's Hive Hook and Spark Sensor JARs
2. Configure Ambari to work with Unravel

  1. Hive configurations

    1. Import the hive hook sensor jar into the classpath

      On the Ambari UI, click Hive > Configs > Advanced > Advanced hive-env. In the hive-env template, towards the end of line, add:

      export AUX_CLASSPATH=${AUX_CLASSPATH}:<path to unravel hive hook sensor jar>/unravel-hive-<version>-hook.jar

      For example:

      export AUX_CLASSPATH=${AUX_CLASSPATH}:/usr/local/unravel-jars/unravel-hive-1.2.0-hook.jar
      ambari-hive-env-aux-classpath.png

    2. Configure hive hook

      On the Ambari UI, click Hive > Configs > Advanced. In the General section, search for the following hive hooks:

      hive.exec.failure.hooks
      hive.exec.post.hooks
      hive.exec.pre.hooks
      hive.exec.run.hooks

      Copy the ,com.unraveldata.dataflow.hive.hook.UnravelHiveHook property against each of the hooks.

      Important

      Ensure to add the property without any space before or after the comma, for example, property=existingValue,newValue

      For example:

      hive.exec.failure.hooks=existing-value,com.unraveldata.dataflow.hive.hook.UnravelHiveHook
hive.exec.post.hooks=existing-value,com.unraveldata.dataflow.hive.hook.UnravelHiveHook
hive.exec.pre.hooks=existing-value,com.unraveldata.dataflow.hive.hook.UnravelHiveHook
hive.exec.run.hooks=existing-value,com.unraveldata.dataflow.hive.hook.UnravelHiveHook

      In case you do not find these hive hooks, go to the Custom hive-site section, click Add Property and add these as key and value per line in the Properties text box.

      For example:

      hive.exec.pre.hooks=com.unraveldata.dataflow.hive.hook.UnravelHiveHook
      ambari-hive-hook.png

      Similarly, in the Custom hive-site section. ensure to set com.unraveldata.host: to <unravel-gateway-internal-IP-hostname>

  2. Configure HDFS

    Click HDFS > Configs > Advanced > Advanced hadoop-env. In the hadoop-env template, look for export HADOOP_CLASSPATH and append Unravel's JAR path as shown.

    export HADOOP_CLASSPATH=${HADOOP_CLASSPATH}:<Unravel sensor installation directory>/unravel-hive-<version>-hook.jar

    For example:

    export HADOOP_CLASSPATH=${HADOOP_CLASSPATH}:/usr/local/unravel-jars/unravel-hive-3.1.0-hook.jar
    ambari-hadoop-env-hadoop-classpath.png

  3. Configure the BTrace agent for Tez

    From the Ambari UI, go to Tez > config and in the General section, append the Java options below to tez.am.launch.cmd-opts and tez.task.launch.cmd-opts:

    -javaagent:/usr/local/unravel-jars/jars/btrace-agent.jar=libs=mr,config=tez -Dunravel.server.hostport=<unravel-host>:4043

    Tip

    In a Kerberos environment, you need to modify tez.am.view-acls property with the "run as" user or *.

  4. Configure the Application Timeline Server (ATS)

    Note

    From Unravel v4.6.1.6, this step is not mandatory.

    1. In yarn-site.xml:

      yarn.timeline-service.enabled=true
yarn.timeline-service.entity-group-fs-store.group-id-plugin-classes=org.apache.tez.dag.history.logging.ats.TimelineCachePluginImpl
yarn.timeline-service.version=1.5 or yarn.timeline-service.versions=1.5f,2.0f

    2. If yarn.acl.enable is true, add unravel to yarn.admin.acl.

    3. In hive-env.sh, add:

      Use ATS Logging: true

    4. In tez-site.xml, add:

      tez.dag.history.logging.enabled=true
tez.am.history.logging.enabled=true
tez.history.logging.service.class=org.apache.tez.dag.history.logging.ats.ATSV15HistoryLoggingService
tez.am.view-acls=*

      If tez-site.xml is not available, you can also add these properties from the Ambari UI. Go to Tez > config > Custom tez-site and add the above properties as key and value per line in the Properties text box.

      Note

      From HDP version 3.1.0 onwards, this Tez configuration must be done manually.

  5. Configure Spark-on-Yarn

    Tip

    For unravel-host, use Unravel Server's fully qualified domain name (FQDN) or IP address.

    1. Add the location of the Spark JARs.

      Click Spark > Configs > Custom spark-defaults > Add Property and use bulk.png Bulk property add mode, or edit spark-defaults.conf as follows:

      Tip

      • If your cluster has only one Spark 1.X version, spark-defaults.conf is in /usr/hdp/current/spark-client/conf.

      • If your cluster is running Spark 2.X, spark-defaults.conf is in /usr/hdp/current/spark2-client/conf.

      This example uses default locations for Spark JARs. Your environment may vary.

      spark.unravel.server.hostport=unravel-host:4043
spark.driver.extraJavaOptions=-javaagent:/usr/local/unravel-jars/jars/btrace-agent.jar=config=driver,libs=<spark-version>
spark.executor.extraJavaOptions=-javaagent:/usr/local/unravel-jars/jars/btrace-agent.jar=config=executor,libs=<spark-version>
spark.eventLog.enabled=true

      For example:

      spark.unravel.server.hostport=xyznode.unraveldata.com:4043
spark.driver.extraJavaOptions=-javaagent:/usr/local/unravel-jars/jars/btrace-agent.jar=config=driver,libs=spark-2.3
spark.executor.extraJavaOptions=-javaagent:/usr/local/unravel-jars/jars/btrace-agent.jar=config=executor,libs=spark-2.3
spark.eventLog.enabled=true

      Note

      If you have multiple Spark services in the same cluster, you must set the Spark default configuration on each of them.

    2. Enable Spark streaming.

  6. Configure Oozie

    1. In Ambari, click Oozie >Configs > Advanced .

    2. In the Filter box, search for oozie.service.WorkflowAppService.system.libpath and check the path shown.

    3. From a terminal application on the Unravel node, pick up the ShareLib Root Directory directory path with the latest timestamp.

      hdfs dfs -ls <path to ShareLib directory>
// For example: hdfs dfs -ls /user/oozie/share/lib/

      Important

      The jars must be copied to the lib directory (with the latest timestamp), which is shown in ShareLib Root Directory.

    4. From a terminal application, copy the Hive Hook JAR /usr/local/unravel-jars/btrace-agent.jar/unravel-hive-<version>-hook.jar and the Btrace JAR, /usr/local/unravel-jars/jars/btrace-agent.jar to the specified path in ShareLib Root Directory.

      hdfs dfs -copyFromLocal /usr/local/unravel-jars/btrace-agent.jar/unravel-hive-<version>-hook.jar /user/oozie/share/lib/<latest timestamp lib directory>/

##For example: 
hdfs dfs -copyFromLocal /usr/local/unravel-jars/unravel-hive-3.1.0-hook.jar /user/oozie/share/lib/lib_20210504054909

      hdfs dfs -copyFromLocal /usr/local/unravel-jars/jars/btrace-agent.jar /user/oozie/share/lib/<latest timestamp lib directory>/

##For example: 
hdfs dfs -copyFromLocal /usr/local/unravel-jars/jars/btrace-agent.jar /user/oozie/share/lib/lib_20210504054909

      Caution

      Jobs controlled by Oozie 2.3+ fail if you do not copy the Hive Hook and BTrace JARs to the HDFS shared library path.

3. Configure the Unravel Host

Define the Tez and ATS properties using the manager service.

  1. Stop Unravel.

    <Unravel installation directory>/unravel/manager stop

  2. Set the properties, shown in the tables below, for TEZ and for the Application Timeline Server (ATS) if it requires authentication. Use the manager config properties set command to set the properties. 

    <Unravel installation directory>/unravel/manager config properties set <property> <key>

##For example: 
/opt/unravel/manager config properties set yarn.ats.webapp.username user1
/opt/unravel/manager config properties set yarn.ats.webapp.password pa$$w0rD

    • Tez

      Property/Description

      Set by user

      Unit

      Default

      com.unraveldata.yarn.timeline-service.webapp.address

      The HTTP address of the Timeline service web application.

      Optional

      string

      (URL)

      -

      com.unraveldata.yarn.timeline-service.port

      Timeline service port.

      number

      8188

      Note

      In a multi-cluster environment, you must add these properties to the Edge node.

    • Application Timeline Server (ATS) requires authentication

      Property/Description

      Set by user

      Unit

      Default

      yarn.ats.webapp.username

      Username required for authentication to the Application Timeline Server (if authentication is required).

      Optional

      string

      -

      yarn.ats.webapp.password

      Password required for authentication to the Application Timeline Server (if authentication is required).

      Optional

      string

      -

  3. Apply the changes.

    <Unravel installation directory>/unravel/manager config apply

  4. Start Unravel.

    <Unravel installation directory>/unravel/manager start
4. Optional: Confirm that Unravel UI shows Tez data.

  1. Run the hive_test_simple.sh script on the HDP cluster or on any cloud environment where hive.execution.engine=tez.

    <Unravel installation directory>/unravel/manager run script hive_test_simple.sh

  2. Log into Unravel server and go to the Applications page. Check for Tez jobs.

    Unravel UI may take a few seconds to load Tez data.

5. Add more configurations

Refer to Additional configurations .

Adding a new node in an existing HDP cluster monitored by Unravel
1. Generate and distribute Unravel's Hive Hook and Spark Sensor JARs
2. For Oozie, copy the Hive Hook and BTrace JARs to the HDFS shared library path
3. If you have changed your Kerberos tokens or principal you must perform the following steps:
In this section: