nginx 日志无法自动切割

之前系统的nginx日志一致是自动切割的，突然某一天无法自动切割了，这样文件会特别大查询日志很不方便。

1、先用：sudo logrotate -f /etc/logrotate.d/nginx命令检查一下能不能切割，以及无法切割的原因

2、如果提示：error: skipping "/usr/local/nginx/logs/access.log" because parent directory has insecure permissions (It's world writable or writable by group which is not "root") Set "su" directive in config file to tell logrotate which user/group should be used for rotation.

　这种很有可能是用非root权限的账号部署或者启动的nginx，这个时候就需要在/etc/logrotate.d/nginx种加入su root root。如下面的例子

/var/log/nginx/*.log {
        su root root
        daily
        missingok
        rotate 52
        compress
        delaycompress
        notifempty
        create 0640 nginx root
        sharedscripts
        postrotate
                if [ -f /var/run/nginx.pid ]; then
                        kill -USR1 `cat /var/run/nginx.pid`
                fi
        endscript
}