It took me a while to find and did need a combination of multiple sources to get Spring Batch Kafka working with SASL_PLAINTEXT authentication. So let me show you how I did it.
Keep in mind it is just a starting configuration so you get a connection working.
spring:
kafka:
bootstrap-servers: <kafka host>:9092
properties:
sasl:
jaas.config: com.sun.security.auth.module.Krb5LoginModule required useKeyTab=true keyTab="C:/dev/my.keytab" principal="[email protected]";
mechanism: GSSAPI
kerberos:
service:
name: kafka
security.protocol: SASL_PLAINTEXT
consumer:
value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
key-deserializer: org.apache.kafka.common.serialization.LongDeserializer
group-id: <groupId>
properties.spring.json.trusted.packages: '*'
template.default-topic: <topic>