Spring支持WebHDFS
作者:互联网
有没有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.
谢谢
解决方法:
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 does not enforce any specific protocol to be used – in fact, as
described in this section anyFileSystem
implementation can be used,
allowing even other implementations than HDFS to be used.
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.要运行此命令,请将文件路径作为命令行参数传递,它将通过调用FileSystem.listStatus列出该路径中存在的每个文件.
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”/>中设置相关的配置属性.豆. Hadoop安全配置是一个非常大的主题.而不是重复信息,我只是指向Apache中的文档:
http://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-common/SecureMode.html
的pom.xml
<?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>
SRC /主/资源/ Hadoop的context.xml中
<?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>
的src /主/爪哇/ testwebhdfs / Main.java
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);
}
}
标签:spring,hadoop,kerberos,webhdfs 来源: https://codeday.me/bug/20190517/1119344.html