Connecting RDBs and Search Engines — Chapter 4 Part 2

Chapter 4 (Part 2): Integrating Kafka CDC Data with OpenSearch Using Flink In this chapter, we use Flink SQL to process CDC data in Debezium JSON format from Kafka and write it to OpenSearch. 1. Architecture Overview graph TD subgraph Source PG[PostgreSQL] end subgraph CDC DBZ[Debezium Connect] end subgraph Stream TOPIC[Kafka Topic] end subgraph Flink FLINK[Flink SQL Kafka Source] OS_SINK[Flink OpenSearch Sink] end subgraph Search OS[OpenSearch] end PG --> DBZ --> TOPIC --> FLINK --> OS_SINK --> OS Flink consumes CDC events from Kafka, transforms them, and upserts the data into OpenSearch. 2. Prerequisites Ensure the following OSS components are running (e.g., via Docker Compose): PostgreSQL Apache Kafka Kafka Connect (Debezium) ZooKeeper Flink (1.19) OpenSearch (2.13)

May 10, 2025 - 23:58

Connecting RDBs and Search Engines — Chapter 4 Part 2

Chapter 4 (Part 2): Integrating Kafka CDC Data with OpenSearch Using Flink

In this chapter, we use Flink SQL to process CDC data in Debezium JSON format from Kafka and write it to OpenSearch.

1. Architecture Overview

graph TD
  subgraph Source
    PG[PostgreSQL]
  end
  subgraph CDC
    DBZ[Debezium Connect]
  end
  subgraph Stream
    TOPIC[Kafka Topic]
  end
  subgraph Flink
    FLINK[Flink SQL Kafka Source]
    OS_SINK[Flink OpenSearch Sink]
  end
  subgraph Search
    OS[OpenSearch]
  end

  PG --> DBZ --> TOPIC --> FLINK --> OS_SINK --> OS

Flink consumes CDC events from Kafka, transforms them, and upserts the data into OpenSearch.

2. Prerequisites

Ensure the following OSS components are running (e.g., via Docker Compose):

PostgreSQL
Apache Kafka
Kafka Connect (Debezium)
ZooKeeper
Flink (1.19)
OpenSearch (2.13)