是否有任何Spring支持wedhdfs?我没有在谷歌上找到任何有用的链接。
我想通过webhdfs连接到具有正常身份验证和kerberos身份验证的hadoop。春天是否支持这个?
任何有用的链接都会有所帮助。
由于
答案 0 :(得分:6)
是的,Spring Data支持这一点。根据此文档,可以配置任何受支持的Hadoop文件系统:
http://docs.spring.io/spring-hadoop/docs/current/reference/html/fs.html
SHDP不强制执行任何特定的协议 - 事实上,如 在本节中描述的任何
FileSystem
实现都可以使用, 甚至允许使用除HDFS之外的其他实现。
请参阅下面的代码示例,演示如何将WebHDFS FileSystem
实例自动连接到命令行应用程序中。要运行此命令,请将文件路径作为命令行参数传递,并通过调用FileSystem.listStatus
列出该路径中的每个文件。
代码示例配置为使用“简单”身份验证连接到不安全的WebHDFS实例。要连接到使用Kerberos保护的WebHDFS实例,您需要在<hdp:configuration id="hadoopConfiguration" />
bean中设置相关的配置属性。 Hadoop安全配置是一个非常大的主题。我不会重复这些信息,而只是指向Apache中的文档:
http://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-common/SecureMode.html
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test-spring-hadoop</groupId>
<artifactId>test-webhdfs</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>Test Spring Hadoop with WebHDFS</name>
<description>Test Spring Hadoop with WebHDFS</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.0.RELEASE</version>
</parent>
<repositories>
<repository>
<id>spring-milestones</id>
<url>http://repo.spring.io/libs-release</url>
</repository>
</repositories>
<properties>
<start-class>testwebhdfs.Main</start-class>
<java.version>1.6</java.version>
<hadoop.version>2.4.1</hadoop.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-hadoop</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>${hadoop.version}</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>${hadoop.version}</version>
</dependency>
</dependencies>
</project>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:hdp="http://www.springframework.org/schema/hadoop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/hadoop http://www.springframework.org/schema/hadoop/spring-hadoop.xsd">
<hdp:configuration id="hadoopConfiguration" />
<hdp:file-system uri="webhdfs://localhost:50070" />
</beans>
package testwebhdfs;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
@Configuration
@ImportResource("hadoop-context.xml")
public class Main implements CommandLineRunner {
@Autowired
private FileSystem fs;
@Override
public void run(String... strings) throws Exception {
Path[] paths = new Path[strings.length];
for (int i = 0; i < strings.length; ++i) {
paths[i] = new Path(strings[i]);
}
for (FileStatus stat: fs.listStatus(paths)) {
System.out.println(stat.getPath());
}
}
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}