How to install Confluent for Kubernetes?

Schema Registry
1

It is my first time working with Kafka and I need to work with Schema Registry.
I already tested and could send messages from a producer to a consumer.
Now I am trying to install the Schema Registry, but I still can’t.

In minikube I have some pods related to my-schema-registry-cp-schema-registry and a service my-schema-registry-cp-schema-registry
I added helm confluent with:

 helm repo add confluentinc https://packages.confluent.io/helm

and install confluent with:

helm upgrade --install confluent-operator confluentinc/confluent-for-kubernetes --namespace default

Configure the Schema registry:

helm upgrade --install confluent-operator confluentinc/confluent-for-kubernetes --namespace default --set kafka.bootstrapServers=my-cluster-kafka-bootstrap:9092 --set schemaRegistry.enabled=true

I created a small AVRO file:

{
  "type": "record",
  "name": "MyAvroRecord",
  "fields": [
    {"name": "value", "type": "string"}
  ]
}

Then I move to the cp-helm-charts/charts/cp-schema-registry folder and do:

helm install my-schema-registry . -f values.yaml --namespace default

And I understand that then I have to register the schema in the Schema Registry by doing:

curl -X POST -H "Content-Type: application/vnd.schemaregistry.v1+json" \
--data '{"schema": "{\"type\":\"record\",\"name\":\"MyAvroRecord\",\"fields\":[{\"name\":\"value\",\"type\":\"string\"}]}"}' \
http://my-schema-registry-cp-schema-registry:8081/subjects/test-topic-value/versions

And here is where I got an error and can’t move forward.

curl: (6) Could not resolve host: my-schema-registry-cp-schema-registry

I was working with chatGPT because I couldn’t find a tutorial or an explanation explaining which steps I should follow to work with Confluent for Kubernetes and Schema Registry.

2

Hey @nicobonder

I assume you’re trying to setup you env with the helm charts here?

seems as you mixing things up a bit.

I would highly recommend to go with these examples here

hth,
michael

3

@mmuehlbeyer Hi, as you can see in the first link says cp-helm-charts was deprecated and both links talk about Confluent for Kubernetes, and I don’t have a problem installing CFK, but I have a problem installing and using Schema Registry.
Do you have any examples of how to work with Schema Registry?

Thanks for your reply.
Nico

4

sure
have look at

it states how to deploy platform including Schema Registry

and the docs

hth,
michael