Lab
A Cloud Guru

Exporting Data to a File with Kafka Connect

Kafka Connect provides several connectors to help you move data to and from a variety of external sources. In this lab, you will implement a basic connector to copy Kafka data to a file on the local disk. This simple exercise will give you some hands-on experience interacting with Kafka Connect, and this introduction will prepare you to work with more advanced use cases.

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Path Info

Level

Intermediate

Duration

30m

Published

Oct 18, 2019

Challenge

Create a Connector to Export Data from the `inventory_purchases` Topic to a File

Create a FileStreamSinkConnector:

curl -X POST http://localhost:8083/connectors -H "Content-Type: application/json" -d '{
  "name": "file_sink",
  "config": {
    "connector.class": "org.apache.kafka.connect.file.FileStreamSinkConnector",
    "tasks.max": "1",
    "file": "/home/cloud_user/output/output.txt",
    "topics": "inventory_purchases",
    "key.converter": "org.apache.kafka.connect.storage.StringConverter",
    "value.converter": "org.apache.kafka.connect.storage.StringConverter"
  }
}'

We should see data from the topic appearing in the output file:

cat /home/cloud_user/output/output.txt

Challenge

Publish a New Purchase of Plums to the `inventory_purchases` Topic
1. Start up a console producer:
```
kafka-console-producer --broker-list localhost:9092 --topic inventory_purchases
```
1. Publish some data representing a purchase of plums:
```
plums:5
```
1. Check the file and verify that the purchase of plums shows up in the file data:
```
cat /home/cloud_user/output/output.txt
```
Note: It may take a few moments for the connector to process the new data.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.