Springboot 集成kafka 消费者实现ssl方式连接监听消息实现消费-编程知识

证书准备：springboot集成kafka 消费者实现如何配置是ssl方式连接的时候需要进行证书的转换。原始的证书是pem, 或者csr方式和key方式的时候需要转换，因为kafka里面是jks 需要通过openssl进行转换。

证书处理：

KeyStore 用于存储客户端的证书和私钥，用于客户端身份验证。
TrustStore 用于存储受信任的根证书或证书链，用于验证服务器的身份。

合并一下证书：

cat your_cert.pem your_key.key > test.pem

合并证书和私钥为一个 PKCS12 文件：

cat your_cert.pem your_key.key > combined.pem
openssl pkcs12 -export -in combined.pem -out client.p12 -name your_alias

2，将 PKCS12 文件导入到 Java KeyStore 中：

keytool -importkeystore -srckeystore client.p12 -srcstoretype PKCS12 -destkeystore client.jks -deststoretype JKS

要生成 truststore.jks 文件，您需要导入服务器的根证书或者服务器的证书链。这样，您的客户端应用程序就可以验证与服务器建立的 SSL 连接。

下面是生成 truststore.jks 的步骤：

获取服务器的根证书或证书链。您可以使用之前提到的 openssl s_client 命令来获取证书链。openssl s_client -connect 你的连接域名 -showcerts
将根证书或证书链保存为 .pem 文件。

使用 keytool 命令将根证书或证书链导入到 truststore.jks 文件中：

keytool -importcert -file your_root_cert.pem -alias root_alias -keystore truststore.jks

项目集成：

maven集成：

  <dependency><groupId>org.springframework.kafka</groupId><artifactId>spring-kafka</artifactId><version>2.5.5.RELEASE</version></dependency>

nacos配置：

spring:kafka:bootstrap-servers: SSL://connectedca.com:443  ##换成你自己的连接ssl:protocol: TLS
###3这三个密码是你证书配置的时候设置的密码trust-store-password: a123456key-store-password: a123456key-password: a123456consumer:group-id: producer:topic: *.event  ##换成你自己的topic

核心配置：


import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.admin.AdminClientConfig;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.core.KafkaAdmin;
import org.springframework.kafka.listener.SeekToCurrentErrorHandler;
import org.springframework.kafka.support.serializer.ErrorHandlingDeserializer;
import org.springframework.kafka.support.serializer.JsonDeserializer;import java.util.HashMap;
import java.util.Map;
@Slf4j
@Configuration
public class KafkaConfiguration {@AutowiredC3ConfigProperties c3ConfigProperties;@Autowiredprivate KafkaConfig kafkaProperties;@Autowiredprivate ResourceLoader resourceLoader;@Beanpublic KafkaAdmin kafkaAdmin() {Map <String, Object> configs = new HashMap <>();configs.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaProperties.getBootstrapServers());return new KafkaAdmin(configs);}@Beanpublic DefaultKafkaConsumerFactory <String, String> consumerFactory() {Map <String, Object> consumerConfig = new HashMap <>();consumerConfig.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaProperties.getBootstrapServers());consumerConfig.put(ConsumerConfig.GROUP_ID_CONFIG, "newbie-car-owner-data-sync");consumerConfig.put(ConsumerConfig.CLIENT_ID_CONFIG, "newbie-car-owner-data-sync");consumerConfig.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);consumerConfig.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);// 设置值的反序列化器为 ErrorHandlingDeserializer2，并配置类型信息consumerConfig.put(ErrorHandlingDeserializer.VALUE_DESERIALIZER_CLASS, JsonDeserializer.class);consumerConfig.put(JsonDeserializer.USE_TYPE_INFO_HEADERS, false); // 启用类型信息头consumerConfig.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");consumerConfig.put(JsonDeserializer.VALUE_DEFAULT_TYPE, "*.KafkaC3MsgListener"); // 设置默认类型信息consumerConfig.put(JsonDeserializer.TRUSTED_PACKAGES, "*.KafkaC3MsgListener"); // 替换为你的实际包名String pemUrl = "";String csrUrl = "";if (c3ConfigProperties.getEnvironment().equals("uat")) {pemUrl = "file/uat/kafka/client.jks";csrUrl = "file/uat/kafka/truststore.jks";} else if (c3ConfigProperties.getEnvironment().equals("pre")) {pemUrl = "file/pre/kafka/client.jks";csrUrl = "file/pre/kafka/truststore.jks";} else if (c3ConfigProperties.getEnvironment().equals("prod")) {pemUrl = "file/prod/kafka/client.jks";csrUrl = "file/prod/kafka/truststore.jks";}try {// 获取证书资源 容器部署一定要用这种方式读取文件，要不然会报错，或者使用挂载Resource pemResource = resourceLoader.getResource("classpath:"+pemUrl);Resource csrResource = resourceLoader.getResource("classpath:"+csrUrl);
// 获取证书文件的路径String keyStorePath = pemResource.getFile().getAbsolutePath();String trustStorePath = csrResource.getFile().getAbsolutePath();consumerConfig.put("ssl.keystore.location", keyStorePath);consumerConfig.put("ssl.truststore.location", trustStorePath);}catch (Exception e){log.error("Resource file error:{}",e.getMessage());}consumerConfig.put("security.protocol", "SSL");consumerConfig.put("ssl.truststore.password", kafkaProperties.getTrustStorePassword());consumerConfig.put("ssl.keystore.password", kafkaProperties.getKeyStorePassword());consumerConfig.put("ssl.key.password", kafkaProperties.getKeyPassword());return new DefaultKafkaConsumerFactory <>(consumerConfig);}@Beanpublic ConcurrentKafkaListenerContainerFactory <String, String> kafkaListenerContainerFactory() {ConcurrentKafkaListenerContainerFactory <String, String> factory = new ConcurrentKafkaListenerContainerFactory <>();factory.setConsumerFactory(consumerFactory());factory.setConcurrency(3); // 设置并发消费者数量factory.setErrorHandler(new SeekToCurrentErrorHandler()); // 错误处理器return factory;}@Beanpublic KafkaC3MsgListener kafkaC3MsgListener() {return new KafkaC3MsgListener();}}

注入配置：


import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;@Data
@Configuration
public class KafkaConfig {@Value("${spring.kafka.bootstrap-servers}")private String bootstrapServers;@Value("${spring.kafka.consumer.group-id}")private String groupId;@Value("${spring.kafka.producer.topic}")private String topic;@Value("${spring.kafka.ssl.trust-store-password}")private String trustStorePassword;@Value("${spring.kafka.ssl.key-store-password}")private String keyStorePassword;@Value("${spring.kafka.ssl.key-password}")private String keyPassword;}

能够看到这个配置就成功了表示：