Configure Schema Registry with kafka ui

[rajarshp]

Hello
We have configured Bitnami Schema Registry in our namespace(AWS Rosa) and want to use it in the Kafka ui. Can you please let me know how to use it ?

I added below part but it is not visible in the Kafka ui values file but still I cannot see it in the UI.

amlApplicationConfig:
  kafka:
    clusters:
      - name: ac-prime-kafka
        bootstrapServers: kafka-bootstrap.<DNS>:443
        schemaRegistry: 
          url: http://schema-registry.<NAMESPACE>.svc.cluster.local:8081

Update:
I guess it took time to display the icon, but now when I am trying to access Schema Registry it is giving 500 error. IN the log I can see an error like host not defined or unable to connect schema-registry..svc.cluster.local:8081

how to resolve this

[Haarolean]

host not defined or unable to connect schema-registry..svc.cluster.local:8081
this is a networking issue, make sure the pod is reacheable from k-ui

[germanosin]

@rajarshp
config should look like:

amlApplicationConfig:
  kafka:
    clusters:
      - name: ac-prime-kafka
        bootstrapServers: kafka-bootstrap.<DNS>:443
        schemaRegistry: http://schema-registry.<NAMESPACE>.svc.cluster.local:8081

You could check possible config values here: https://ui.docs.kafbat.io/configuration/configuration-file

[rajarshp]

@germanosin Thanks> Yes I did change and it is working fine now

[germanosin]

Great!

[rajarshp]

@germanosin have a small doubt, can we check the schema details for any exiting topic where messages are there without registering any schema explicitly?

[germanosin]

I didn't fully understand your question, but if you're asking whether it's possible to check if messages in an existing Kafka topic use a schema from the Schema Registry without registering any schema explicitly — then here's the explanation:

Kafka messages don’t include an explicit flag indicating whether they are serialized using a Schema Registry schema. However, if the messages are serialized using Confluent's Avro, Protobuf, or JSON Schema serializers, the message value typically starts with a magic byte (0) followed by 4 bytes representing the schema ID from the Schema Registry.

If this format is present, you can extract the schema ID and fetch the schema from the Schema Registry to deserialize the message.

If your question is about identifying messages that don’t use a schema — there’s no automatic way to detect that. You might try to deserialize and, if it fails, assume it's a raw string or JSON. If it's plain text, you could try treating it as a string. If it's JSON, you can parse it accordingly.