How to load data from TrustPilot to Kafka

Begin by accessing Trustpilot's API to retrieve the data you wish to move. You'll need to register for an API key by creating a Trustpilot Business account and navigating to the API section. Make sure to review Trustpilot's API documentation to understand the available endpoints and quotas.

If you haven't already, set up a Kafka cluster. You can do this by downloading Kafka from the Apache Kafka website and following the installation instructions. Ensure your cluster is running by starting the Zookeeper and Kafka server using the command line.

Create a topic in Kafka where the data from Trustpilot will be published. Use the Kafka command-line tool to create a topic with the desired configurations (e.g., replication factor, partitions):
```
bin/kafka-topics.sh --create --topic trustpilot-data --bootstrap-server localhost:9092 --partitions 1 --replication-factor 1
```

Write a script in a language like Python or Node.js to fetch data from Trustpilot using the API. The script should authenticate using your API key, call the appropriate endpoints, and handle pagination if necessary to retrieve all available data. Use libraries such as `requests` in Python or `axios` in Node.js for making API calls.

Once you have fetched the data, transform it into a format suitable for Kafka, such as JSON. Ensure that the data structure is consistent and includes all necessary fields. This step is crucial for maintaining data integrity when publishing to Kafka.

Use a Kafka client library (such as `kafka-python` for Python or `kafka-node` for Node.js) to publish the transformed data to the previously created Kafka topic. Your script should iterate over the data and send each record to Kafka:
```python
from kafka import KafkaProducer
import json

producer = KafkaProducer(bootstrap_servers='localhost:9092',
value_serializer=lambda v: json.dumps(v).encode('utf-8'))

for record in data:
producer.send('trustpilot-data', value=record)

producer.flush()
```

Finally, verify that the data is correctly published to Kafka. Use the Kafka consumer command-line tool to read messages from your topic and check for data accuracy:
```
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic trustpilot-data --from-beginning
```
Ensure that the messages appear as expected, and troubleshoot any issues related to data format or connectivity.

This guide should provide a straightforward approach to moving data from Trustpilot to Kafka without relying on third-party connectors or integrations.