keepalived检测脚本时不能启动nginx
本帖最后由 liuyuhui_gdtyj 于 2018-08-09 14:30 编辑使用nginx做负载均衡，keepalived做高可用。做一个检查nginx脚本，如果停止了先尝试重启，如果仍然失败，则结束keepalived。下面代码并未写结束keepalived，只是写echo输出，测试脚本问题在哪里。
主要代码如下：
vrrp_script chk_nginx { script "/etc/keepalived/check_nginx_pid.sh" interval 3}
vrrp_instance VI_1 {...... track_script { chk_nginx }}
检测nginx脚本如下：# cat /etc/keepalived/check_nginx_pid.sh #!/bin/bashA=`ps -C nginx --no-header |wc -l`if [ $A -eq 0 ];then echo "nginx is not running,now start it ..." >> /tmp/echo.log /usr/sbin/nginx &>> /tmp/echo.log sleep 1 B=`ps -C nginx --no-header |wc -l` if [ $B -eq 0 ];then echo "Oh,start nginx faild" >> /tmp/echo.log else echo "OK,start nginx success" >> /tmp/echo.log fielse echo "OK,the nginx is running." >> /tmp/echo.log
fi
然后给脚本执行权限：
# ll /etc/keepalived/check_nginx_pid.sh
-rwxr-xr-x. 1 root root 432 Aug9 13:51 /etc/keepalived/check_nginx_pid.sh
#killall nginx #先关闭nginx进程，下面开始测试
# ps -C nginx --no-header
结果为空
# /etc/keepalived/check_nginx_pid.sh
# ps -C nginx --no-header
15002 ? 00:00:00 nginx
15004 ? 00:00:00 nginx
可以看到，手动执行这个脚本没任何问题，但启动keepalived去自动执行这个脚本，到/usr/sbin/nginx就报没有权限，/tmp/echo.log内容如下：
nginx is not running,now start it ...
/etc/keepalived/check_nginx_pid.sh: line 5: /usr/sbin/nginx: Permission denied
Oh,start nginx faild
请问这个权限问题keepalived要怎么解决？
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