Amazon Web Services (AWS) Databricks

Before installing Unravel in AWS Databricks, check and ensure that the installation requirements are completed and follow the below instructions to install and configure Unravel:

1. Create an EC2 instance and connect Databricks to Unravel VM

Create an EC2 instance

On your AWS Console, go to the EC2 dashboard and click Launch Instance.

Select the following options based on Unravel's instance requirements:

Base OS
Instance type and size
Ports
Networking
The EC2 instance must be in the same region as the target clusters, which Unravel EC2 node will be monitoring.

Security groups or policies

Create a security group that allows port 3000 and port 4043 from cluster nodes' IP address, and put the security group member used on the cluster in this rule.

Sample inbound rule

Type	Protocol	Port range	Source
All traffic	All	All	Security group ID of this group or subnet IP block. For example, 10.10.0.0/16
SSH	TCP	22	0.0.0.0/0 or trusted public IP for SSH access
Custom TCP Rule	TCP	443	Security group ID used on the cluster or subnet IP block (if the IP block belongs to a different VPC). Required for VPC peering connection
Custom TCP Rule	TCP	3000	Security group ID used on the cluster or subnet IP block (if the IP block belongs to a different VPC). Required for VPC peering connection.
Custom TCP Rule	TCP	4043	Security group ID used on the cluster or subnet IP block (if the IP block belongs to a different VPC). Required for VPC peering connection.
Custom TCP Rule	TCP	4443	Security group ID used on the cluster or subnet IP block (if the IP block belongs to a different VPC). Required for VPC peering connection.

Connect Databricks with Unravel VM

Review the Virtual Private Cloud (VPC) Peering options to connect Databricks with the Unravel VM.

Workspace	VPC Peering Options
Workspace and Unravel VM are in the same VPC	-
Workspace VPC is in a different Region	Use VPC Peering: Unravel VPC Peering Amazon VPC Peering Databricks VPC Peering
Workspace VPC is in a different AWS account	Use VPC Peering: Unravel VPC Peering Amazon VPC Peering Databricks VPC Peering

2. Download Unravel

3. Deploy Unravel

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.

After you extract the contents of the TAR file or RPM package, unravel directory is created within the installation directory (<unravel_installation_directory>) and Unravel will be available in <Unravel_installation_directory>/unravel. The directory layout 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 should be performed by a user, who will run Unravel.

Create an Installation directory.
```
mkdir /path/to/installation/directory
```
For example: mkdir /opt/
Extract Unravel tar file to the installation directory, which you have 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 </path/to/installation/directory>
```
For example: tar zxf unravel-4.7.0.0.tar.gz -C /opt
The unravel directory will be available within /opt.
Grant ownership of the directory to a user who will run Unravel.
```
chown -R username:groupname </path/to/installation/directory>
```
For example: chown -R hadoop:hadoop /opt/unravel/

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 unravel user.

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

Create an installation directory.
```
mkdir /usr/local/unravel
```
Run the following command:
```
rpm -i unravel-<version>.rpm
```
For example: rpm -i unravel-4.7.0.0.rpm
The unravel directory will be available in /usr/local.
If you want to provide a different location, use the --prefix command.
For example:
mkdir /opt/unravel
rpm -i unravel-4.7.0.0.rpm --prefix /opt
The unravel directory will be available in /opt.
Grant ownership of the directory to a user who will run Unravel. This user executes all the processes involved in Unravel installation.
```
chown -R username:groupname /usr/local/unravel
```
For example: chown -R hadoop:hadoop /usr/local/unravel
Continue with the installation procedures as unravel user.

4. Install Unravel

You can install Unravel either with Interactive Precheck or manually without Interactive Precheck.

Note

Unravel recommends installation with Interactive Precheck.

Install Unravel with Interactive Precheck

To install Unravel with Interactive precheck, you must run the Interactive Precheck utility to generate a bootstrap configuration file for installation.

The Interactive Precheck utility is run to validate the required configurations before installing Unravel. When you run the Interactive Precheck utility various checks are prompted for gathering configuration information. The responses you provide for these checks are used to generate a bootstrap configuration file. This file, which contains the configuration information, is then used to install Unravel.

Do the following to install and configure Unravel with Interactive Precheck.

After you download and deploy the Unravel, run the precheck.sh script from unravel/versions/X.Y.Z/healthcheck/.
For example:
/opt/unravel/versions/X.Y.Z/healthcheck/precheck.sh

Enter the necessary details when you are prompted for the following configuration information:

This section covers general information about your Unravel install. You are prompted for the following:

Data platform you want to monitor.
For Hadoop: type of Unravel node you want to configure.
For edge nodes: core node location and test connectivity.

You must answer the following prompts:

-- General information
Which data platform are you installing for?
   1- Hadoop
   2- EMR
   3- HDI
   4- Databricks
   5- Dataproc
   6- BigQuery

Select one of the above [Hadoop]: 

## You can choose a number corresponding to the platform. For example:
    Select one of the above [Hadoop]: 1
    Selected: Hadoop

Which type of Unravel node is this?
   1- Single node installation
   2- Core node - Multi cluster installation
   3- Edge node - Multi cluster installation

## You can choose a number corresponding to the type of Unravel deployment. For example:
    Select one of the above [Single node installation]: 1
    Selected: Single node installation
    User that will run unravel [unravel]:

This check allows you to configure database-related information and an external database for Unravel.

-- Database configuration
Unravel comes with PostgreSQL and can configure it automatically as its database.
Optionally you can:- Configure it to use an external database (MySQL, MariaDB or PostgreSQL).
- Have it configure and manage MySQL or MariaDB for you.


Configure an external database? (y/n) [No]: n

Do you wish to use an Unravel managed MySQL or MariaDB (no = Internal Postgresql)? (y/n) [No]: n

Will Unravel connect to a MySQL or MariaDB database (ex: hive metastore) ? (y/n) [No]: n

If you answer No, you are further prompted to select an Unravel-managed database for the installation.

If you answer Yes, you are further prompted for the type of external database that you want to configure.

-- Database configuration
   
   Configure an external database? (y/n) [No]: y

   Type
   1- PostgresQL
   2- MySQL
   3- MariaDB

If you choose a specific type of external database, you are prompted for the following database information and test connectivity to that database. Refer to Integrating Database for more details. For example:

-- Database configuration
  
   Configure an external database? (y/n) [No]: y

   Type
   1- PostgresQL
   2- MySQL
   3- MariaDB

   Select one of the above []: 1
   Selected: PostgresQL

   Database hostname [None]: unrave

   Database port (integer) [None]: 666

   Database schema [None]: unravel

   Does the database use TLS (y/n) [No]: n

   Database username [None]: admin

   Database password [None] (no echo):

   Do you wish to test connecting to the external database? (y/n) [Yes]:-- Database configuration
 Configure an external database? (y/n) [No]:

If you choose MySQL or MariaDB database you are further prompted for extra packages. If you answer Yes, the Extra packages section searches for the required JDBC drivers.
```
-- Database configuration
 Will Unravel connect to a MySQL or MariaDB database (ex: hive metastore) ? (y/n) [No]: 
```

The Extra packages check shows if you use Unravel-managed MySQL/MariaDB or need JDBC drivers. Else, this check is automatically skipped.

-- Extra package location

*** JDBC drivers are required for Unravel managed MySQL or MariaDB.
*** Database software package is required for Unravel managed MySQL or MariaDB.

External package location [None]: /<my-extra-packages>
##This is the path to the directory where the required packages are located.

If the required packages are located, then the following message is shown:

The following packages will be installed:
   Database server: /my-extra-packages/mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
   JDBC driver:
     - /my-extra-packages/mysql-connector-java-5.1.48.tar.gz

 External package: Ok

If the required packages are not found, then the following error message is showing:

External package: ERROR
 - ERROR: Couldn't find jdbc drivers in /my-extra-packages
 - ERROR: Looked for:
   mysql-connector-java-*.tar.gz
   mysql-connector-java-*.jar
   mariadb-java-client-*.jar
 - ERROR: Couldn't find database server package in /my-extra-packages
 - ERROR: Looked for:
   mysql-*-linux-glibc2.12-x86_64.tar.gz
   mariadb-*-linux-x86_64.tar.gz

This check allows you to configure and test HTTPS for the unravel UI. This check prompts you for the certificate, key, password, and hostname details used to access Unravel.

Use HTTPS to access unravel? (y/n) [Yes]:  
##If you answer “Yes”, you are prompted for the path to the certificate and key. Unravel uses this information to configure TLS during installation. 
##If you answer “No”, you are shown a warning message for confirmation.

The information provided is verified for the following:

If the Key and Certificate match
If the certificate is valid
If the certificate applies for the provided hostname

This check allows you to set the Unravel UI port and verify the connectivity.

-- Unravel default port
  
  Port number (integer) [3000]: 

  Do you want to test if the port is accessible? (y/n) [Yes]: 
    
  This will open port 3000 and listen for connection for 120 seconds.
  Use your browser to test if the Unravel UI will be accessible on that port.
    
  We have detected the following hostnames:
  - some.host.example
    
 Browse to: http://some.host.example:3000
    
 ATTENTION: This address is an example. You should test with the URL that will be used to access Unravel.

A connection on port 3000 is tried and established. If the connection is successful, Unravel Port Test: OK is shown on the browser, and Unravel port: Reached is shown on the server.

This check allows you to set a custom data directory and verify the access if the directories exist. You will always find the software location where you deploy the Unravel binaries. In this check, only the space and access are tested. That data location that you have configured will be used.

-- Unravel directories

  Software [/opt/unravel]: 

  Data [/opt/unravel/data]: 

  Directories: ERROR
  - OK: 33 GB of free disk space for software.
  - ERROR: SYSH0026: Space for data 33 GB is low, recommended minimum is 100 GB.

This check allows you to configure and test email. You are prompted for host and credentials, and the following items are tested:

Connectivity
Authentication, only if provided.
Optional: Send test mail.

Following is a sample:

-- Mail server (SMTP) configuration

Unravel can send notification and alert emails.
   This will allow you to configure and test connection to a SMTP server.
   Optionally, it can also send a test email.

   You will have to provide:
   - Protocol, hostname and port
   - Credentials if required



   Configure a SMTP server? (y/n) [No]: y

   SMTP hostname [None]: smtphostname.gmail.com

   SMTP port (usually 25 for clear text, 465 for SSL, 587 for STARTLS) (integer) [None]: 587

   Security protocol
   1- None
   2- SSL
   3- StartTLS

   Select one of the above [None]: 3
   Selected: StartTLS

   Authentication required? (y/n) [Yes]: y

   Username [None]: daemon@unraveldata.com

   Password [None] (no echo):

   From [None]: daemon@unraveldata.com

   To [None]: user@unraveldata.com

   Send test email (y/n) [No]: y

Note

For more information, refer to Using the Interactive Precheck utility.

The responses that you have provided for the configuration information are used to generate a configuration file. You can use this configuration file when you run the setup command to install and configure Unravel.

After you have completed the responses, you are prompted to confirm if you want to generate the bootstrap configuration file. Press ENTER if you want to generate the bootstrap configuration file.
```
-- Unravel bootstrap configuration

   Generate a unravel bootstrap configuration file? (y/n) [Yes]:
```
The bootstrap configuration file is generated and located at /tmp/unravel-interactive-precheck/unravel-bootstrap.yaml.

Install Unravel with the bootstrap configuration file.

<unravel_installation_directory>/unravel/versions/<Unravel version>/setup --bootstrap /tmp/unravel-interactive-precheck/unravel-bootstrap.yaml

Apply the changes.

<Unravel installation directory>/unravel/manager config apply

Start all the services.

<unravel_installation_directory>/unravel/manager start

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

Install Unravel manually

You can run the setup command to install Unravel manually.

About setup command

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. When you run the setup command without additional parameters, the Unravel managed PostgreSQL database is used. Otherwise, you can specify any of the following databases, which is supported by Unravel, with 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.
The Unravel data and configurations are located 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 options for setup.

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

After deploying the binaries, if you are the root user, switch to Unravel user.
```
  su - <unravel user>
```
Notice
Only the Unravel user who owns the installation directory should run the setup command to install Unravel.

Run setup command with any of the following databases (PostgreSQL, MySQL, MariaDB). Refer to setup options for all the additional parameters that you can run with the setup command.

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

Refer to Integrate database topic and complete the prerequisites 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 you use another database.

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

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

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

Unravel managed PostgreSQL
```
<unravel_installation_directory>/unravel/versions/<Unravel version>/setup --enable-databricks
```
Notice
If you are using Unravel managed PostgreSQL database, and the Hive metastore is using MySQL, refer Set up Unravel Managed PostgreSQL for Hive metastore with MySQLIntegrate database (Cloud)
External PostgreSQL
```
<unravel_installation_directory>/unravel/versions/<Unravel version>/setup --enable-databricks --external-database postgresql <HOST> <PORT> <SCHEMA> <USERNAME> <PASSWORD>
```
For example: /opt/unravel/versions/abcd.992/setup --enable-databricks --external-database postgresql xyz.unraveldata.com 5432 unravel_db_prod unravel unraveldata
Note
The HOST, PORT, SCHEMA, USERNAME, and PASSWORD are optional fields and are prompted if missing.

Unravel managed MySQL

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

External MySQL

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

Note

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

Unravel managed MariaDB

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

External MariaDB

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

Note

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

When you run the setup command, the Precheck utility, which identifies the issues that prevent a successful installation, is automatically run. Refer to Precheck filters list to view details of each item in the precheck run output.

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. After the prechecks are resolved, you must re-login or reload the shell to execute the setup command again.

Note

In certain situations, you can skip the precheck using the setup --skip-precheck.

For example:

/opt/unravel/versions/<Unravel version>/setup --cluster-access abc1011.p2g.net.eu.xyz --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 check_network_ports, run the setup command as follows:

setup --filter-precheck ~check_limits,~check_network_ports

Filters	Description	Expected Value
System
Check uptime	Verifies the period since the last server reboot.	>24h
Clock sync	Verifies if the clock synchronization service is running on the server.	The clock synchronization service is up and running.
CPU requirement	Verifies if the server has enough CPUs to run Unravel efficiently.	Check requirements.
Memory requirement	Verifies that the server has enough memory to run Unravel efficiently.	Check requirements.
Disk access	Verifies that the user who runs unravel has access to the configured disk locations.	Unravel users can access the configured disk locations.
Disk Freespace	Verifies if the disk locations have enough free space.	Check requirements
Kerberos tools	Verifies that the Kerberos tools are available on the server to support kerberized environments.	Kerberos tools are installed.
Network ports	Verifies that the network ports used by Unravel are available.	Check requirements
OS libraries	Verifies the required libraries if run with Unravel managed MySQL.	The following packages must be installed for fulfilling the OS level requirements for MySQL: `numactl-libs` (for libnuma.so) `libaio` (for libaio.so)
OS release	Verifies that the OS distribution is supported.	Check compatibility matrix
OS settings	Verifies vm.max_map_count recommended.	Check requirements
SELinux	Verifies if the SELinux status is enabled or not and provides in which mode it is(Permissive, Disabled, Enforcing).	Check product documentation.
Check limits	Verifies that user limits are set to values	Check requirements
Healthcheck report bundle	Healthcheck report tarball. This report provides the summary and information gathered by the healthcheck with the location.

Filters	Description	Expected Value
System
Check uptime	Verifies the period since the last server reboot.	>24h
Clock sync	Verifies if the clock synchronization service is running on the server.	The clock synchronization service is up and running.
CPU requirement	Verifies if the server has enough CPUs to run Unravel efficiently.	Check requirements.
Memory requirement	Verifies that the server has enough memory to run Unravel efficiently.	Check requirements.
Disk access	Verifies that the user who runs unravel has access to the configured disk locations.	Unravel users can access the configured disk locations.
Disk Freespace	Verifies if the disk locations have enough free space.	Check requirements
Kerberos tools	Verifies that the Kerberos tools are available on the server to support kerberized environments.	Kerberos tools are installed.
Network ports	Verifies that the network ports used by Unravel are available.	Check requirements
OS libraries	Verifies the required libraries if run with Unravel managed MySQL.	You must install the following packages for fulfilling the OS level requirements for MySQL: `numactl-libs` (for libnuma.so) `libaio` (for libaio.so)
OS release	Verifies that the OS distribution is supported.	Check compatibility matrix
OS settings	Verifies vm.max_map_count recommended.	Check requirements
SELinux	Verifies if the SELinux status is enabled or not and provides the mode (Permissive, Disabled, Enforcing).	Check product documentation.
Check limits	Verifies that user limits are set to values	Check requirements
Hadoop
Clients	Ensure that the following Hadoop clients are installed and configured on the server: Apache Hadoop Hadoop Distributed File System (HDFS) Apache Hadoop Yarn Apache Hive Apache Beeline You can ignore the following Precheck limitations on MapR: The Hadoop client check reports missing clients (HDFS and beeline) Any check that depends on the HDFS client (for example, HDFS Access check) reports the following message: `HADH0070: hdfs client is not available` Ensure that Unravel has access to files in the MapR file system or needs to provide access manually.	Check compatibility matrix
Distribution	Verifies that the Hadoop distribution is a supported version.	Check compatibility matrix
RM HA Enabled/Disabled	Verifies if RM is running in HA mode
Healthcheck report bundle	healthcheck report tarball. This report provides the summary and information gathered by the healthcheck with the location.

setup Options	Description
-h, --help	Shows help for setup.
--config CONFIG	Specify a different path to the configuration file. `<unravel_installation_directory>`/unravel/versions/`<Unravel version>`/setup --config `path/to/config/directory`
--enable-core	Enables core node support for non-Hadoop clusters.
--cluster-access (Edge node parameter)	Enables cluster access to the core node in a multi-cluster environment.
--data-forwarder host:port cluster-type cluster-id	Data forwarder, main unravel node.
--data-directory	Specify a different path to the data directory.
--external-database [param [param ...]]	Enable external database.
--external-database-ssl	Enable external database with SSL.
--log-file	Setup log file location. Default is `/tmp/unravel-setup-YYYYMMDD-HHMMSS.log`.
--extra DIR, -e DIR	Specify extra packages location.
--precheck	Run the preinstallation check.

Following is a sample of the setup command run result:

/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/abcd.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
--------------------------------------------------------------------------------
hadoop
 Clients            : PASSED
                 - Found hadoop
                 - Found hdfs
                 - Found yarn
                 - Found hive
                 - Found beeline
 Distribution         : PASSED, found CDH 6.3.3
 RM HA Enabled/Disabled    : PASSED, Disabled
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 ~]$

Apply the changes.

<Unravel installation directory>/unravel/manager config apply
<Unravel installation directory>/unravel/manager refresh databricks

Start all the services.

<unravel_installation_directory>/unravel/manager start

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

5. Configure Unravel Log Receiver

Stop Unravel.

<unravel_installation_directory>/unravel/manager stop

Review and update Unravel Log Receiver (LR) endpoint. By default, this is set to local FQDN only visible to workspaces within the same network. If this is not the case, run the following to set the LR endpoint:
```
<unravel_installation_directory>/unravel/manager config databricks set-lr-endpoint <hostname> ''
```
For example: /opt/unravel/manager config databricks set-lr-endpoint <hostname> ''
After you run this command, you are prompted to specify the port number. Ensure to press ENTER and leave it empty.

Apply the changes.

<Unravel installation directory>/unravel/manager config apply
<Unravel installation directory>/unravel/manager refresh databricks

Start all the services.

<unravel_installation_directory>/unravel/manager start

6. Connect Databricks cluster to Unravel

Run the following steps to connect the Databricks cluster to Unravel.

Click Add Workspace and enter the following details.

Field	Description
Workspace Id	Databricks workspace ID, which can be found in the Databricks URL. The random numbers shown after o= in the Databricks URL become the workspace ID. For example, in this URL:https://<databricks-instance>/?o=987654321123456, the Databricks workspace ID is the random number after o=, which is 987654321123456.
Workspace Name	Databricks workspace name. A human-readable name for the workspace. For example, `ACME-Workspace`
Instance (Region) URL	Regional URL where the Databricks workspace is deployed. Forhttps://dbc-1dbx661f-a33e.cloud.databricks.com.
Tier	Select a subscription option: Standard or Premium. For Databricks Azure, you can get the pricing information from the Azure portal. For Databricks AWS you can get detailed information about pricing tiers from Databricks AWS pricing.
Token	Use the personal access token to secure authentication to the Databricks REST APIs instead of passwords. You can generate the token from the workspace URL (Go to Settings > User Settings > Access Token > Generate New Token) See Authentication using Databricks personal access tokens to create personal access tokens. Note Users with admin or non-admin roles can create personal access tokens.

Note

After you click Add, it takes around 2-3 minutes to register the Databricks Workspace with Unravel.

Add Unravel configuration to Databricks clusters using any of the following options:

Global init script

Global init script applies the Unravel configurations at the Workspace level. To set up global init scripts, follow the instructions:

On Databricks, go to Workspace > Settings > Admin Console > Global init scripts.
Click +Add and set the following:
Item
Settings
Name
Set to unravel_cluster_init.
Script
Copy the contents from unravel_cluster_init.sh.
Enabled
Set to True.
Click Add to save the settings.

Item	Settings
Name	Set to unravel_cluster_init.
Script	Copy the contents from unravel_cluster_init.sh.
Enabled	Set to True.

Click +Add again and set the following:

Item	Settings
Name	Set to unravel_spark_init.
Script	Copy the contents from unravel_spark_init.sh. Note This script supports up to Databricks 10.4 (latest at the time). In case a new DBR is available, test and update the condition as applicable.
Enabled	Set to True.

Click Add to save the settings.

Cluster init script
Cluster init script applies the Unravel configurations at the cluster level. To setup cluster init scripts from the cluster UI, do the following:
1. Go to Unravel UI, click Manage > Workspaces > Cluster configuration to get the configuration details.
2. Follow the instructions and update each cluster (Automated /Interactive) that you want to monitor with Unravel.
  Add Unravel configuration to Databricks clusters. Go to Unravel UI and from the upper right click Manage > Workspaces > Cluster configuration to get the configuration details. Follow the instructions and update every cluster (Automated /Interactive) in your workspace.
  Tip
  By default, the Ganglia metrics are enabled with Dcom.unraveldata.agent.metrics.ganglia_enabled property set to true.
  Note
  To add Unravel configurations to job clusters via API, refer How to setup cluster init scripts via cluster API.

Set additional configurations if required.
Configure the Workspace for Data page.
Ensure that at least one of the workspaces is populated before you configure a workspace for the Data page.
To configure the Databricks for Data page, do the following:
1. Stop Unravel
```
<Unravel installation directory>/unravel/manager stop
```
2. Set the following property.
```
<Unravel installation directory>/unravel/manager config properties set hive.metastore.<X>.workspace.ids <Comma-separated list of Databricks workspaces>
```
  Replace <X> with the metastore variables listed in the com.unraveldata.hive.metastore.list property. Refer here for more details about this property.
3. Apply the changes.
```
<Unravel installation directory>/unravel/manager config apply
```
4. Start Unravel
```
<Unravel installation directory>/unravel/manager start
```
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 the healthcheck intervals and email alerts to receive the healthcheck reports.

Tip

The workspace setup can be done at any time and does not impact the running clusters or jobs.

In this section:

Home

Amazon Web Services (AWS) Databricks

1. Create an EC2 instance and connect Databricks to Unravel VM

2. Download Unravel

Important

3. Deploy Unravel

Important

4. Install Unravel

Note

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Notice

Tip

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5. Configure Unravel Log Receiver

6. Connect Databricks cluster to Unravel

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Tip

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