BS模式中用php创建socket 无权限的解决办法
最近为南方基地的平台编写监控接口,采用BS构架,其中有一个监测虚拟机是否宕机的功能。
过程为:监控机发出访问请求-->接口分析请求-->启动socket检测目标虚拟机是否宕机。
因为通过ICMP协议检测,所以用了 SOCK_RAW 的socket类型。
服务器使用apache + php + mysql,发现程序出错,提示说没有权限创建socket。后来查资源得知,此类socket需要root权限或者以cgi方式跑php结合用 setuid() 才能创建socket。
解决方法:改用nginx+php-cgi+mysql解决。
在编译php的时候,要做以下修改才能用root用户启动服务。
1.找到php的源代码$src_path/sapi/cgi/fpm/fpm_unix.c (版本不一样,最好是通过 find $src_path -name fpm_unix.c)
2.在文件顶部增加一个宏定义:#define I_REALLY_WANT_ROOT_PHP
3.重新 configure make make install
4.php-fpm.conf 将user、group都修改成root
作者:penguim

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