streams-manifests/kafka-resources/base/kafka-schema-registry/kafka-user-registry.yaml

apiVersion: kafka.strimzi.io/v1beta2
kind: KafkaUser
metadata:
  name: schema-registry-user
  namespace: kafka
  labels:
    strimzi.io/cluster: kafka-cluster
spec:
  authentication:
    type: tls
  authorization:
    # Official docs on authorizations required for the Schema Registry:
    # https://docs.confluent.io/current/schema-registry/security/index.html#authorizing-access-to-the-schemas-topic
    type: simple
    acls:
    # Allow all operations on the registry-schemas topic
    # Read, Write, and DescribeConfigs are known to be required
    - resource:
        type: topic
        name: registry-schemas
        patternType: literal
      operation: All
      type: allow
    # Allow all operations on the schema-registry* group
    - resource:
        type: group
        name: schema-registry
        patternType: prefix
      operation: All
      type: allow
    # Allow Describe on the __consumer_offsets topic
    - resource:
        type: topic
        name: __consumer_offsets
        patternType: literal
      operation: Describe
      type: allow