I'm trying to use Kafka Connect to stream PostgreSQL database updates via Debezium into Elasticsearch.

I'm using the Kafka template on Railway, which includes:

• Kafka

• Zookeeper

• KRaft UI

I published a public Docker image to GHCR for Kafka Connect using:

debezium/connect:2.3

The service exposes port 8083.

For BOOTSTRAP_SERVERS, I'm using the internal Kafka domain provided by Railway.

However, when I try to create a connector by sending a POST request to /connectors, I always receive a 503 Service Unavailable error.

I’d like to confirm:

• Is this setup supported on Railway?

• If so, what might be wrong in my configuration?

Thank you.