Command to parse Kafka version query

1. Overview of Kafka version query command

The Kafka version query command is used to query the version information of the Kafka cluster so that users can understand the cluster’s running status and perform operations such as version upgrade. Kafka provides multiple ways to query version information, including using command line tools, API, and JMX.

2. Command line tool to query version

Kafka provides a command line tool named kafka-version.sh to query cluster version information. This tool is located in the bin directory of the Kafka installation directory and can be run using the following command:

./kafka-version.sh

This command will output the version information of the current Kafka cluster, including Kafka version number, build date, revision number, etc.

3. API query version

Kafka also provides an API to query version information. You can use the following code sample to query version information:

import org.apache.kafka.clients.admin.AdminClient;
import org.apache.kafka.clients.admin.DescribeClusterResult;

public class KafkaVersionQuery {

  public static void main(String[] args) {
    // 创建AdminClient实例
    AdminClient adminClient = AdminClient.create();

    // 查询集群版本信息
    DescribeClusterResult describeClusterResult = adminClient.describeCluster();

    // 获取集群版本号
    String clusterVersion = describeClusterResult.clusterId().version();

    // 打印集群版本号
    System.out.println("Cluster version: " + clusterVersion);

    // 关闭AdminClient实例
    adminClient.close();
  }
}

This code sample uses AdminClient to query cluster version information and print it to the console.

4. JMX query version

Kafka also provides a JMX interface to query version information. You can use the following code example to query version information:

import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import java.lang.management.ManagementFactory;

public class KafkaVersionQuery {

  public static void main(String[] args) {
    // 获取MBeanServerConnection实例
    MBeanServerConnection mBeanServerConnection = ManagementFactory.getPlatformMBeanServer();

    // 创建ObjectName实例
    ObjectName objectName = new ObjectName("kafka.server:type=Broker,name=0");

    // 获取Kafka版本号
    String kafkaVersion = (String) mBeanServerConnection.getAttribute(objectName, "version");

    // 打印Kafka版本号
    System.out.println("Kafka version: " + kafkaVersion);
  }
}

This code example uses MBeanServerConnection to query Kafka version information and print it to the console.

5. Summary

Kafka provides a variety of ways to query version information, including using command line tools, API and JMX. Users can choose the appropriate method to query version information according to their own needs.

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