现象：centos7中安装docker后，重新启动后，eno16777736没有启动，在centos7中使用ifconfig命令后 没有展示eno16777736网口的信息。增加了docker0的信息。
ifconfig -a 可以看到eno16777736，但是没有IP信息。
使用service network restart 启动失败
[root@localhost ~]# service network restart
Restarting network (via systemctl): Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
使用journalctl -xe命令
Nov 24 17:39:29 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Nov 24 17:39:29 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
-- Subject: Unit network.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit network.service has failed.
--
-- The result is failed.
Nov 24 17:39:29 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Nov 24 17:39:29 localhost.localdomain systemd[1]: network.service failed.
Nov 24 17:39:29 localhost.localdomain polkitd[910]: Unregistered Authentication Agent for unix-process:3908:129753 (system bus name :1.103, object path /org/freedesktop/PolicyKit1/Authenticat
使用ifup eno16777736 提示没有该设备
处理方法：
临时方案： 需要每次开机后设置，不能永久生效。估计是没有读取
eno16777736的配置文件，所以手工设置了一遍。
ww1.设置IP,发现网关内的可以相互访问，但是不能ping通外网。
ifconfig eno16777736 192.168.0.141
2.增加默认网关
route add default gw 192.168.106.2
3.添加nameserver
vi /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.106.2
