[英]Kafka Configuration class in Spring Boot not finding keystore or truststore
I'm setting up a Kafka consumer configuration and the configuration cannot find the keystore or truststore on the classpath: 我正在设置Kafka使用者配置,但该配置在类路径上找不到密钥库或信任库:
@EnableKafka
@Configuration
public class KafkaConfig {
@Value("${kafka.ssl.keystore}")
private String keyStorePath;
@Value("${kafka.ssl.truststore}")
private String trustStorePath;
@Bean
public ConsumerFactory<String, String> getConsumerFactory() {
Map<String, Object> properties = new HashMap<>();
properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"my-bootstrap.mydomain.com:443");
properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
properties.put(ConsumerConfig.GROUP_ID_CONFIG, "group1");
properties.put(ConsumerConfig.CLIENT_ID_CONFIG, "client1");
properties.put("enable.auto.commit", "true");
properties.put("auto.commit.interval.ms", "500");
properties.put("session.timeout.ms", "30000");
properties.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, "SSL");
properties.put(SslConfigs.SSL_KEYSTORE_LOCATION_CONFIG, keyStorePath);
properties.put(SslConfigs.SSL_KEYSTORE_PASSWORD_CONFIG, "password");
properties.put(SslConfigs.SSL_TRUSTSTORE_LOCATION_CONFIG, trustStorePath);
properties.put(SslConfigs.SSL_TRUSTSTORE_PASSWORD_CONFIG, "password");
properties.put(SslConfigs.SSL_KEY_PASSWORD_CONFIG, "password");
return new DefaultKafkaConsumerFactory<>(properties);
}
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<String, String> factory
= new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(getConsumerFactory());
return factory;
}
}
The keystore and truststore are both located in the directory src/main/resources/ssl
in the same maven module as the configuration class. 密钥库和信任库都位于与配置类相同的maven模块中的目录
src/main/resources/ssl
中。
I set up the placeholders in the application.yml as follows: 我在application.yml中设置占位符,如下所示:
kafka:
ssl:
keystore: classpath:ssl/kafka-keystore.jks
truststore: classpath:ssl/kafka-truststore.jks
However, the application fails to start with the following exception: 但是,应用程序无法启动,但出现以下异常:
"org.apache.kafka.common.KafkaException: java.io.FileNotFoundException: classpath:ssl/kafka-keystore.jks (No such file or directory)"
My understanding is that using @Value
enables the use of the classpath:
prefix to resolve the classpath (see this link) https://www.baeldung.com/spring-classpath-file-access 我的理解是,使用
@Value
可以使用classpath:
前缀来解析类路径(请参阅此链接) https://www.baeldung.com/spring-classpath-file-access
Moreover, the @Value
technique works just fine to resolve the keystores and truststores for the reactive WebClient configuration in the same application. 此外,
@Value
技术可以很好地解决同一应用程序中反应式WebClient配置的密钥库和信任库。
What do I need to do to resolve the classpath for the Kafka configuration? 我需要怎么做才能解决Kafka配置的类路径? Am I missing something here?
我在这里想念什么吗?
Your injecting into a String which is going to keep the "classpath:" within the String value and provide it as a property to DefaultKafkaConsumerFactory, try injecting into a spring Resource like: 您注入一个String,它将“ classpath:”保留在String值内,并将其作为属性提供给DefaultKafkaConsumerFactory,请尝试注入spring资源,例如:
import org.springframework.core.io.Resource;
@Value("classpath:path/to/file/in/classpath")
Resource resourceFile;
Then you can access the file and you could get the absolute path like: 然后,您可以访问文件,并且可以获取绝对路径,例如:
resourceFile.getFile().getAbsolutePath()
The idea being you could provide the absolute path to DefaultKafkaConsumerFactory 这个想法是您可以提供DefaultKafkaConsumerFactory的绝对路径
But you could also try removing the "classpath:" and inject as String like your current code which might work depending on how DefaultKafkaConsumerFactory treats that property. 但是您也可以尝试删除“ classpath:”,并像当前代码一样将其作为String注入,这可能取决于DefaultKafkaConsumerFactory处理该属性的方式。 But I can't see why absolute path above wouldn't work.
但是我看不到为什么上面的绝对路径不起作用。
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