Add kafka SASL version control to kafka_consumer (#6350)

plugins/common/kafka/sasl.go

@@ -0,0 +1,25 @@
+package kafka
+
+import (
+	"errors"
+
+	"github.com/Shopify/sarama"
+)
+
+func SASLVersion(kafkaVersion sarama.KafkaVersion, saslVersion *int) (int16, error) {
+	if saslVersion == nil {
+		if kafkaVersion.IsAtLeast(sarama.V1_0_0_0) {
+			return sarama.SASLHandshakeV1, nil
+		}
+		return sarama.SASLHandshakeV0, nil
+	}
+
+	switch *saslVersion {
+	case 0:
+		return sarama.SASLHandshakeV0, nil
+	case 1:
+		return sarama.SASLHandshakeV1, nil
+	default:
+		return 0, errors.New("invalid SASL version")
+	}
+}