Use Apicurio Schemaregistry in Confluent kafka

[ibalachandar86]

Hi,

I am using confluentinc/cp-kafka-connect docker image to run kafka connectors, using confluent schema registry.
Only Kafka connectors are running in Kubernetes not Kafka brokers and Schema registry. Below is my working Kubernetes yaml file with confluent schema registry.

Kubernetes YAML file

---

cp-control-center:
enabled: false
cp-kafka:
enabled: false
cp-kafka-rest:
enabled: false
cp-ksql-server:
enabled: false
cp-schema-registry:
enabled: false
cp-zookeeper:
enabled: false
cp-kafka-connect:
replicaCount: 1

image: {confluentinc/cp-kafka-connect image with kafka connectors}
imageTag: XXXX
imagePullPolicy: IfNotPresent
servicePort: 8083

cp-schema-registry:
url: "https://XXXX:8081"

configurationOverrides:

"schema.registry.ssl.truststore.location": "/home/appuser/kafka.truststore.jks"
"schema.registry.ssl.truststore.password": "XXXX"
"key.converter.schemas.enable": "false"
"value.converter.schemas.enable": "false"
"basic.auth.credentials.source": "XXXX"

"config.storage.topic": "_kafka-connect-hdfs-source-connector-configs"
"offset.storage.topic": "_kafka-connect-hdfs-source-connector-offsets"
"status.storage.topic": "_kafka-connect-hdfs-source-connector-status"
"plugin.path": "/usr/share/java,/usr/share/confluent-hub-components,/etc/kafka-connect/jars"
"key.converter": "io.confluent.connect.avro.AvroConverter"
"value.converter": "io.confluent.connect.avro.AvroConverter"
"internal.key.converter": "org.apache.kafka.connect.json.JsonConverter"
"internal.value.converter": "org.apache.kafka.connect.json.JsonConverter"
"security.protocol": "SASL_SSL"
"sasl.mechanism": "GSSAPI"
"sasl.jaas.config": com.sun.security.auth.module.Krb5LoginModule required \
  useTicketCache=false \
  renewTGT=false \
  useKeyTab=true \
  keyTab="/home/appuser/ssl/svc-dev.keytab" \
  principal="svc-dev";
"sasl.kerberos.service.name": "kafka"
"ssl.truststore.location": "/home/appuser/kafka.truststore.jks"
"ssl.truststore.password": "XXXX"

kafka:
bootstrapServers: "https://XXXX:9092"

---

Instead of Confluent Schema registry, We are trying to use Apicurio schema registry. We have installed Apicurio SR in a separate server not in Kubernetes.
In above YAML file, We have to provide Apicurio schema registry configs in place of quoted Confluent schema registry properties.
I could able to create tokens for my credentials and execute get/post schemas using curl command in APICurio SR.

My questions are,

1. Is it possible to use Apicurio schema registry in combination with Confluent Kafka?

2. If yes, what are the changes/configs I have use to make it work.

3. How to convert this token into authentication properties/configs?