PHP调用SHELL下传本地文件到Hadoop的hdfs中
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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