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PHP调用SHELL下传本地文件到Hadoop的hdfs中

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Release: 2016-06-13 13:19:51
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PHP调用SHELL上传本地文件到Hadoop的hdfs中

本来是用Thrift进行上传,但其上传效率之低,另人发指,只好选用其它方法。

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环境:

php 运行环境为nginx + php-fpm

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因为hadoop开启了权限控制,所以直接使用php调用shel进行上传时,没有权限。通过php执行命令看来,php运行的帐户和级均为nobody。因此,解决方法有两个:一,在hadoop的shell中创建目录,并把目录的所有者赋给nobody组的nobody用户。二,原来的目录权限放开,使用777。下面详讲操作步骤:

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方法一:./hadoop fs -chown -R nobody:nobody /resources

注:/resources是用户目录,需要根据情况改变

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方法二:./hadoop fs -chomod -R 777 /resources

注:/resources是用户目录,需要根据情况改变

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php调用shell的方式:

public function uploadByShell($local, $hdfs) {
			
			$shell =  "sh /usr/local/hadoop/hadoop-0.20.2/bin/hadoop fs -copyFromLocal " . $local ." " . $hdfs;
			$shell .= "; sh /usr/local/hadoop/hadoop-0.20.2/bin/hadoop fs -chmod 777 " . $hdfs;
			$res = null;
			system($shell, $res);
			$flag = false;
			if ($res == "0") {
				$flag = true;
			}
			
			return $flag;
		}
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