监控工具-Nagios¶
问题¶
当某个服务出现故障，准备重新安装执行时，发生错误Could not open command file '/usr/local/nagios/var/rw/nagios.cmd' for update!
查看/usr/local/nagios/var/rw/nagios.cmd的权限为：
ll /usr/local/nagios/var/rw/nagios.cmd prw-rw----. 1 nagios nagios 0 Dec 22 20:01 nagios.cmd
再查看Nagios的配置文件“/etc/local/nagios/etc/nagios.cfg”，可以发现:
# EXTERNAL COMMAND FILE # This is the file that Nagios checks for external command requests. # It is also where the command CGI will write commands that are submitted # by users, so it must be writeable by the user that the web server # is running as (usually 'nobody'). Permissions should be set at the # directory level instead of on the file, as the file is deleted every # time its contents are processed. command_file=/usr/local/nagios/var/rw/nagios.cmd
即要求管道文件/usr/local/nagios/var/rw/nagios.cmd可以被Web服务器读写，显然Web服务器不是以用户nagios的身份来运行的，（一般是apache）。所以将此目录所属的工作组改为apache。
chown :apache /usr/local/nagios/var/rw/nagios.cmd
即可。重新操作可以正常完成。