Create Interactive Metabase Dashboards that Work with Cassandra Data

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Use CData Connect Cloud to connect to live Cassandra data and create an interactive dashboard in Metabase from Cassandra data.

Metabase is an open source data visualization tool that allows users to create interactive dashboards. When paired with CData Connect Cloud, users can easily create visualizations and dashboards linked to live Cassandra data. This article describes how to connect to Cassandra and build a simple visualization using Cassandra data.

CData Connect provides a pure cloud-to-cloud interface for Cassandra, allowing you to easily integrate with live Cassandra data in Metabase — without replicating the data. Connect looks exactly like a SQL Server database to Metabase and uses optimized data processing out of the box to push all supported SQL operations (filters, JOINs, etc) directly to Cassandra, leveraging server-side processing to quickly return Cassandra data.

Connect to Cassandra in Connect Cloud

CData Connect Cloud uses a straightforward, point-and-click interface to connect to data sources.

  1. Log into Connect Cloud, click Connections and click Add Connection
  2. Select "Cassandra" from the Add Connection panel
  3. Enter the necessary authentication properties to connect to Cassandra.

    Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

  4. Click Create & Test
  5. Navigate to the Permissions tab in the Add Cassandra Connection page and update the User-based permissions.

Add a Personal Access Token

If you are connecting from a service, application, platform, or framework that does not support OAuth authentication, you can create a Personal Access Token (PAT) to use for authentication. Best practices would dictate that you create a separate PAT for each service, to maintain granularity of access.

  1. Click on your username at the top right of the Connect Cloud app and click User Profile.
  2. On the User Profile page, scroll down to the Personal Access Tokens section and click Create PAT.
  3. Give your PAT a name and click Create.
  4. The personal access token is only visible at creation, so be sure to copy it and store it securely for future use.

With the connection configured, you are ready to connect to Cassandra data from Metabase.

Connect to CData Connect from Metabase

After creating the virtual database, navigate to your Metabase instance. Use the SQL Server interface to connect to Connect Cloud.

  1. Navigate to the administration screen (Settings -> Admin) and click "Add Database" from the "Databases" tab
  2. Configure the connection to Connect Cloud and click "Save"
    • Database type: Select "SQL Server"
    • Name: Name the connection (e.g. "Cassandra (Connect Cloud)")
    • Host: tds.cdata.com
    • Port: 14333
    • Database name: The name of the connection you just created (e.g. Cassandra1)
    • Username: A Connect Cloud username (e.g. user@mydomain.com)
    • Password: The PAT for the above Connect Cloud user
    • Click to Use a secure connection (SSL)

Execute Cassandra Data with Metabase

Once you configure the connection to Connect Cloud, you can query Cassandra and build visualizations.

  1. Use the "Write SQL" tool to retrieve the Cassandra data
  2. Write a SQL query based on the Cassandra connection in CData Connect Cloud, e.g.

    SELECT City, SUM(TotalDue) FROM Customer GROUP BY City
  3. Navigate to the "Visualization" screen, choose a visualization, and configure the visualization

More Information & Free Trial

At this point, you have built a simple visualization from Cassandra data in Metabase. You can continue to work with live Cassandra data in Metabase just like you would any SQL Server database. For more information on creating a live connection to Cassandra (and more than 100 other data sources), visit the Connect Cloud page. Sign up for a free trial and start working with live Cassandra data in Metabase today.