在安装InfluxDB的时候，新装的竟然提示报错。
status 报错信息如下：
May 10 22:36:37 Centos7 systemd[1]: Unit influxdb.service entered failed state.
May 10 22:36:37 Centos7 systemd[1]: influxdb.service failed.
May 10 22:36:37 Centos7 systemd[1]: influxdb.service holdoff time over, scheduling restart.
May 10 22:36:37 Centos7 systemd[1]: Stopped InfluxDB is an open-source, distributed, time series database.
May 10 22:36:37 Centos7 systemd[1]: start request repeated too quickly for influxdb.service
May 10 22:36:37 Centos7 systemd[1]: Failed to start InfluxDB is an open-source, distributed, time series database.
May 10 22:36:37 Centos7 systemd[1]: Unit influxdb.service entered failed state.查阅资料，发现有可能是权限没有给够，在journalctl -u influxdb执行后发现有提示权限问题，应该就是了。
随后给/etc/influxdb目录权限即可。记得要给influxdb本身和子文件子目录的所有权限。
以下目录也一起给
chmod 777 -R /var/lib/influxdb另附开启启动解决方案：
influxdb:sudo systemctl enable influxdb
chronograf:sudo /sbin/chkconfig --add chronograf
Chronograf的默认启动端口：/etc/default/chronograf文件下，添加
POTR=9090