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.") }