golang通过http端口访问hadoop

无聊尝试一下golang连接hdfs, 写了个hello world

golang包地址

https://github.com/vladimirvivien/gowfs

安装

go get github.com/vladimirvivien/gowfs

写程序之前需要修改hadoop的两个配置文件

分别是

• hsdfs-site.xml 里的 dfs.webhdfs.enabled

<property> 
  <name>dfs.webhdfs.enabled</name> 
  <value>true</value> 
</property>

• core-site.xml 里的 hadoop.http.staticuser.user

<property> 
  <name>hadoop.http.staticuser.user</name> 
  <value>hadoop</value> 
</property>

简单的例子

package main
import (
	"fmt"
	"log"
	"github.com/vladimirvivien/gowfs"
)
func main() {
	fs, err := gowfs.NewFileSystem(gowfs.Configuration{Addr: "localhost:50070", User: "hadoop"})
	if err != nil{
	  log.Fatal(err)
	}
	checksum, err := fs.GetFileChecksum(gowfs.Path{Name: "/user/kafka/hello.txt"})
	if err != nil {
	  log.Fatal(err)
	}
	fmt.Println (checksum)
	createTestDir(fs, "/user/kafka/hello1.txt")	
}
func createTestDir(fs *gowfs.FileSystem, hdfsPath string) {
	path := gowfs.Path{Name:hdfsPath}
	ok, err := fs.MkDirs(path, 0744)
	if err != nil || !ok {
		log.Fatal("Unable to create test directory ", hdfsPath, ":", err)
	}
	log.Println ("HDFS Path ", path.Name, " created.")
}

本文来自:开源中国博客

感谢作者:dclink

查看原文:golang通过http端口访问hadoop

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