docs: document crdb integration

doc/user/config.toml

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+bannerLink = "https://materialize.com/blog/self-managed/?utm_medium=docs-banner&utm_source=documentation&utm_campaign=FY25_Blogs&sf_campaign=701TR00000NoNFXYA3&utm_term=&utm_content="
 
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+weight = 5
 
 #
 # Connect sources
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 name = "Ingest data"
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 [[menu.main]]
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 name = "Reference"
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 name = "Redpanda"
 parent = "create-source"
 url = "/sql/create-source/kafka"
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doc/user/content/ingest-data/cockroachdb/_index.md

@@ -0,0 +1,29 @@
+---
+title: "CockroachDB"
+description: "Connecting Materialize to a CockroachDB source."
+disable_list: true
+menu:
+  main:
+    parent: "ingest-data"
+    name: "CockroachDB"
+    identifier: "crdb"
+    weight: 16
+---
+
+## Change Data Capture (CDC)
+
+Materialize supports CockroachDB as a real-time data source. Using Kafka with
+CockroachDB
+[Changefeeds](https://www.cockroachlabs.com/docs/stable/change-data-capture-overview),
+Materialize can consume changefeedsto create and efficiently maintain real-time
+views on top of CDC data.
+
+{{< tip >}}
+{{< guided-tour-blurb-for-ingest-data >}}
+{{< /tip >}}
+
+## Integration guides
+
+| Integration guides                          |
+| ------------------------------------------- |
+| <ul><li>[Kafka + Changefeeds](/ingest-data/cockroachdb/kafka-changefeeds)</li></ul>    |

doc/user/content/ingest-data/cockroachdb/kafka-changefeeds.md

@@ -0,0 +1,75 @@
+---
+title: "CockroachDB CDC using Kafka and Changefeeds"
+description: "How to propagate Change Data Capture (CDC) data from a CockroachDB database to Materialize"
+menu:
+  main:
+    parent: "crdb"
+    name: "Using Kafka and Changefeeds"
+    identifier: "crdb-kafka-changefeeds"
+    weight: 5
+---
+
+Change Data Capture (CDC) allows you to track and propagate changes in a CockroachDB database to downstream consumers.
+In this guide, we will cover how to use Materialize to create and efficiently maintain real-time views on top of CDC data using Kafka and CockroachDB changefeeds.
+
+{{< tip >}}
+{{< guided-tour-blurb-for-ingest-data >}}
+{{< /tip >}}
+
+## Kafka + Changefeeds
+
+[Changefeeds](https://www.cockroachlabs.com/docs/stable/change-data-capture-overview) capture row-level changes resulting from `INSERT`, `UPDATE`, and `DELETE` operations against CockroachDB tables and publish them as events to Kafka topics.
+Using the [Kafka source](/sql/create-source/kafka/#using-debezium), Materialize can consume these changefeeds making the data available for use in views.
+
+### Database setup
+
+Before creating a changefeed, ensure that the upstream database is configured to support CDC.
+
+1.  Enable rangefeeds for the CockroachDB instance:
+
+    ```sql
+    SET CLUSTER SETTING kv.rangefeed.enabled = true;
+    ```
+
+### Create Changefeeds
+
+Create one changefeed for each table you want to publish to Materialize.
+Each table will produce data to its own Kafka topic that can be consumed by Materialize.
+Use the following SQL command:
+
+```sql
+CREATE CHANGEFEED FOR TABLE my_table
+    INTO 'kafka://broker:9092'
+    WITH format = avro,
+         confluent_schema_registry = 'http://registry:8081',
+         diff,
+         envelope=wrapped
+```
+
+Materialize recommends creating changefeeds with using format `avro` and enabling `diff` and using envelope `wrapped`.
+This will emits change events using a schema that matches Debezium and contains detailed
+information about upstream database operations, like the `before` and `after`
+values for each record.
+Please refer to the CockroachDB documentation for full details on changefeed configurations.
+
+### Create a source
+
+To interpret the changefeeds, create a source in Materialize using the [Debezium envelope](/sql/create-source/kafka/#using-debezium).
+
+```mzsql
+CREATE SOURCE kafka_repl
+    FROM KAFKA CONNECTION kafka_connection (TOPIC 'my_table')
+    FORMAT AVRO USING CONFLUENT SCHEMA REGISTRY CONNECTION csr_connection
+    ENVELOPE DEBEZIUM;
+```
+
+By default, the source will be created in the active cluster; to use a different
+cluster, use the `IN CLUSTER` clause.
+
+### Create a view
+
+{{% ingest-data/ingest-data-kafka-debezium-view %}}
+
+### Create an index on the view
+
+{{% ingest-data/ingest-data-kafka-debezium-index %}}

doc/user/content/integrations/_index.md

@@ -103,6 +103,16 @@ database as a source requires enabling [**GTID-based binlog replication**](/sql/
 | MySQL _(direct)_       | {{< supportLevel alpha >}} | See the [source documentation](/sql/create-source/mysql/) for more details, and the relevant integration guide for step-by-step instructions:<p></p><ul><li>[Amazon RDS for MySQL](/ingest-data/mysql/amazon-rds)</li><li>[Amazon Aurora for MySQL](/ingest-data/mysql/amazon-aurora)</li><li>[Azure DB for MySQL](/ingest-data/mysql/azure-db)</li><li>[Google Cloud SQL for MySQL](/ingest-data/mysql/google-cloud-sql)</li><li>[Self-hosted MySQL](/ingest-data/mysql/self-hosted)</li></ul> |
 | MySQL _(via Debezium)_ | {{< supportLevel production >}}  | See the [MySQL CDC guide](/integrations/cdc-mysql/) for a step-by-step breakdown of the integration. |             |
 
+### CockroachDB
+
+CockroachDB is supported as a [**source**](/concepts/sources)
+through
+[Changefeeds](/ingest-data/cockroachdb/) (via Kafka or Redpanda).
+
+| Service                | Support level                    | Notes                                                                                                |             |
+| ---------------------- | -------------------------------- | ---------------------------------------------------------------------------------------------------- | ----------- |
+| CockroachDB _(via Changefeeds)_ | {{< supportLevel production >}}  | See the [CockroachDB Changefeed Guide](/ingest-data/cockroachdb/) for a step-by-step breakdown of the integration. |             |
+
 ### Other databases
 
 {{< note >}}