title: How to provide Kafka Streams properties via Spring Cloud Stream in YAML?
body: <p>I'd like to move <code>spring.kafka.streams.*</code> under <code>spring.cloud.stream</code> - is this possible? I thought of <code>streams-properties</code> similarly to <code>consumer-properties</code> or <code>producer-properties</code>, but it doesn't work.
  </p>
  
  <pre><code>spring:
    cloud:
      config:
        override-system-properties: false
        server:
          health:
            enabled: false
      stream:
        bindings:
          input_technischerplatz:
            destination: technischerplatz
          output_technischerplatz:
            destination: technischerplatz
        default:
          group: '${spring.application.name}'
          consumer:
            max-attempts: 5
        kafka:
          binder:
            auto-add-partitions: false
            auto-create-topics: false
            brokers: '${values.spring.kafka.bootstrap-servers}'
            configuration:
              header.mode: headers
            consumer-properties:
              allow.auto.create.topics: false
              auto.offset.reset: '${values.spring.kafka.consumer.auto-offset-reset}'
              enable.auto.commit: false
              isolation.level: read_committed
              max.poll.interval.ms: 300000
              max.poll.records: 100
              session.timeout.ms: 300000
            header-mapper-bean-name: defaultKafkaHeaderMapper
            producer-properties:
              acks: all
              key.serializer: org.apache.kafka.common.serialization.StringSerializer
              max.in.flight.requests.per.connection: 1
              max.block.ms: '${values.spring.kafka.producer.max-block-ms}'
              retries: 10
            required-acks: -1
    kafka:
      streams:
        applicationId: '${spring.application.name}_streams'
        properties:
          default.key.serde: org.apache.kafka.common.serialization.Serdes$StringSerde
          default.timestamp.extractor: org.apache.kafka.streams.processor.LogAndSkipOnInvalidTimestamp
          state.dir: '${values.spring.kafka.streams.properties.state.dir}'
  </code></pre>