SQL Server Connector: Install and Configure

Network Configuration

Open outbound TCP port 1433 to SQL Server (default).

Note

SQL Server instances can listen on non-standard ports. If you connect Alation to a SQL Server instance, then open the appropriate outbound TCP ports from the Alation server.

Service Account

Alation supports both SQL Server authentication and Windows authentication.

For Windows authentication, SQL Server must be configured for Kerberos, SQL Server default, or instance SPNs must be registered with Active Directory. The following information is required during configuration if SQL Server uses Windows authentication:

  • Active Directory realm

  • Active Directory server IP or DNS name

To verify that the SQL Server is configured for Kerberos, run the following command from a Windows CMD prompt. The command must be run on a computer in the same realm as SQL Server:

setspn -L [SQL-server-hostname]

The following screenshot is an example output of the setspn command showing SPNs for a SQL Server default instance:

../../../_images/DS_SQLServer02.png

We recommend using an Active Directory service account. This enables Alation to read log files generated by extended events. A SQL Server username and password also reads log files generated by extended events.

JDBC URI

Depending on the type of your SQL Server deployment, Alation may support the following authentication types:

  • Basic authentication

  • NTLM authentication

  • Kerberos authentication

  • SSL authentication

Refer to SQL Server Connector: Overview for details on which authentication methods are supported.

When building the URI, include the required components depending on the authentication method.

Note

Starting in version 1.1.4.1957, the connector uses a SQL Server driver that assumes that the SSL mode is enabled by default unless the value encrypt=false is explicitly passed in the JDBC URI.

The only exception is the Azure SQL Managed Instance data source, where basic authentication will work with or without explicitly including the parameter encrypt=false into the URI.

Basic/NTLM Authentication

  • Hostname or IP of the instance

  • Port number

  • Database name (optional)

  • The parameter encrypt=false to indicate that you are not using an SSL-enabled connection

Format

sqlserver://<Host_Name>:<Port_Number>;databaseName=<db_name>;encrypt=false

Example

sqlserver://10.13.47.231:1433;databaseName=SQL;encrypt=false

Note

For an Azure Managed Instance data source, both formats will work: sqlserver://<hostname or ip>:<port>;encrypt=false or sqlserver://<hostname or ip>:<port>.

Kerberos Authentication

  • Hostname or IP of the instance

  • Port number

  • Server SPN (optional)

  • The parameter encrypt=false to indicate that you are not using an SSL-enabled connection

Note

Kerberos authentication requires the krb5.conf file to be uploaded in the General Settings > Connector Settings section when configuring the data source settings.

Format

sqlserver://<Host_name>:<Port_Number>;ServerSpn=<Server_SPN>;integratedSecurity=true;authenticationScheme=JavaKerberos;encrypt=false

Example

sqlserver://10.13.47.231:1433;ServerSpn=MSSQLSvc/EC2DRTS-7FA6452.al94278.test.local;integratedSecurity=true;authenticationScheme=JavaKerberos;encrypt=false

SSL Authentication

  • Hostname or IP of the instance

  • Port number

  • The SSL-related parameters, such as encrypt=true

    Note

    The SSL certificate must be uploaded in the General Settings > Connector Settings section when configuring the data source settings.

Format

sqlserver://<Host_Name>:<Port_Number>;encrypt=true;trustServerCertificate=true;hostNameInCertificate=Database Server

Example

sqlserver://10.13.82.165:1433;encrypt=true;trustServerCertificate=true;hostNameInCertificate=Database Server

Configuration in Alation

STEP 1: Install the Connector

Alation On-Prem

Important

Installation of OCF connectors requires Alation Connector Manager to be installed as a prerequisite.

To install an OCF connector:

  1. If this has not been done on your instance, install the Alation Connector Manager: Install Alation Connector Manager.

  2. Ensure that the OCF connector Zip file that you received from Alation is available on your local machine.

  3. Install the connector on the Connectors Dashboard page using the steps in Manage Connectors.

Alation Cloud Service

Connecting to Cloud Databases

Note

On Alation Cloud Service instances, Alation Connector Manager is available by default.

To install an OCF connector:

  1. Ensure that the OCF connector Zip file that you received from Alation is available on your local machine.

  2. Install the connector on the Connectors Dashboard page using the steps in Manage Connectors.

Connecting to On-Prem Databases

Important

To connect to an on-prem database from an Alation Cloud Service instance, you may need to use Alation Agent.

  1. Ensure that the Alation Agent functionality is enabled on your Alation instance. Create a Support ticket with Alation for an Alation representative to enable the Alation Agent feature on your instance and to receive the Alation Agent installer.

  2. Install Alation Agent using the information in Alation Agent.

  3. Install the OCF connector on Alation Agent.

STEP 2: Create and Configure a New Data Source

On the Access tab, set the data source visibility using these options:

  • Public Data Source—The data source will be visible to all users of the catalog.

  • Private Data Source—The data source will be visible to the users allowed access to the data source by Data Source Admins.

You can add new Data Source Admin users in the Data Source Admins section.

The name of this connector is SQL Server OCF Connector.

../../../_images/SQLServerOCF_01.png

Access

On the Access tab, set the data source visibility using these options:

  • Public Data Source—The data source will be visible to all users of the catalog.

  • Private Data Source—The data source will be visible to the users allowed access to the data source by Data Source Admins.

You can add new Data Source Admin users in the Data Source Admins section.

General Settings

Perform the configuration on the General Settings tab.

Application Settings

Specify Application Settings if applicable. Click Save to save the changes after providing the information.

Parameter

Description

BI Connection Info

This parameter is used to generate lineage between a BI source and this data source. Specify the host and the port used by BI connections that pull data from this data source.

Use the following format: host:port

You can provide multiple values as a comma-separated list:

10.13.71.216:1541,sever.com:1542

The host and port details can also be found under Properties > Database connections on the BI Datasource page > Connections tab.

Disable Automatic Lineage Generation

Select this checkbox to disable automatic lineage generation from QLI, MDE, and Compose queries. By default, automatic lineage generation is enabled.

Connector Settings

Data Source Connection

Populate the data source connection information and save the values by clicking Save in this section.

Parameter

Description

JDBC URI

Specify the JDBC URI in the required format.

Username

Specify the service account username.

Password

Specify the service account password.

Enable Kerberos authentication

Select this checkbox if using Kerberos authentication and upload the krb5.conf file using the upload link under the checkbox.

Use keytab

Select this checkbox if using keytabs and upload the keytab file for the service account using the upload link under the checkbox.

Enable SSL

Enable or disable SSL authentication by selecting or clearing the Enable SSL checkbox.

If the Enable SSL checkbox is enabled, upload the SSL certificate using the upload link below.

Truststore password

Specify the password for the SSL certificate.

The password will be deleted if the data source connection is deleted.

Enable NTLM

Select this checkbox to use NTLM. The connector will enable NTLM while establishing the JDBC connection.

Domain Name

Specify the Domain Name if NTLM authentication is used.

Logging Configuration

Select the logging level for the connector logs and save the values by clicking Save in this section. The available log levels are based on the Log4j framework.

Parameter

Description

Log level

Select the log level to generate logs. The available options are INFO, DEBUG, WARN, TRACE, ERROR, FATAL, ALL.

You can view the connector logs in Admin Settings > Manage Connectors > SQL Server OCF Connector.

Obfuscate Literals

Obfuscate Literals—Enable this toggle to hide actual values in the query statements that are ingested during query log ingestion or executed in Compose. This toggle is disabled by default.

Test Connection

Under Test Connection, click Test to validate network connectivity.

Deleting the Data Source

You can delete your data source from the General Settings tab. Under Delete Data Source, click Delete to delete the data source connection.

../../../_images/SQLServerOCF_02.png

Metadata Extraction

You can configure metadata extraction (MDE) for an OCF data source on the Metadata Extraction tab of the Settings page. Refer to Configure Metadata Extraction for OCF Data Sources for information about the available configuration options.

The default queries that the connector uses to extract metadata can be found in Extraction Queries for SQL Server. You can customize these queries to adjust extraction to your specific needs.

Metadata Extraction from Compose

If a table is created from Compose, users will be able to see the relevant table metadata on the catalog page without re-running MDE.

Users should use the following query format to create tables in Compose:

CREATE TABLE [CATALOG_NAME].[SCHEMA_NAME].[TABLE_NAME] ({column properties});

For creating view, catalog name needs to be included in the Compose JDBC URI on the General Settings page as database=<Catalog_Name>.

Use following query to create VIEW:

USE [CATALOG_NAME]
CREATE VIEW [SCHEMA_NAME].[TABLE_NAME] AS {view condition}

Note

  • When you create a view from Compose, the MDE job will get triggered automatically and fail with the error EmptyStreamException. Alternately, MDE can be run manually after creating the view to extract the view on the relevant catalog page.

  • For lineage to be generated successfully for View, fully qualified name of the table needs to be mentioned in the view condition.

  • For Drop table scenario, table will be removed from catalog page and automated MDE job will not be triggered. It is an expected behaviour.

Sampling and Profiling

Sampling and profiling is supported. For details, see Configure Sampling and Profiling for OCF Data Sources.

Compose

On the Compose tab, an admin can enable the use of the Compose tool for this data source.

  1. Before you enable Compose, provide the JDBC URI in the Default Connection field which Compose will use as a default connection and Save.

    ../../../_images/SQLServerOCF_03.png

  2. Enable the Enabled in Compose toggle to enable Compose for this data source. Select Compose Connection Sharing option based on the description in the table below:

    Compose Connection Option

    Description

    Shared connections across tabs

    This option lets users use the same connection across multiple Compose tabs.

    Separate connection per tab

    Users can use different connections for each Compose tab, which enables them to run multiple queries at the same time.

  3. Select a Data Uploader option based on the description below:

    Data Uploader

    Description

    Use Global Setting (True)

    or

    Use Global Setting (False)

    Use the global setting option that is set in alation_conf using alation.data_uploader.enabled flag.

    Users can upload data if the flag is set to true or if the flag is set to false, users cannot upload the data for any data source.

    Enable for this data source

    Use this option to enable the data upload for this data source and override the global setting if the global setting in alation_conf if it is set to false.

    Disable for this data source

    Use this option to disable the data upload for this data source and override the global setting in alation_conf if it is set to true.

    Note

    OAuth connection is not supported for this data source.

Query Log Ingestion

See SQL Server Connector: Query Log Ingestion.

For SQL Server RDS QLI, see SQL Server RDS: Query Log Ingestion.

Troubleshooting

Refer to Troubleshooting.