启动（重启）后会有奇怪的网络掉线问题。 #236
Description
RT，在onecloud定时重启之后，会出现eth0断联的问题，这个时候强行断电上电才能解决，不知道有没有遇到类似问题的。
Nov 08 03:50:33 onecloud systemd-networkd[287]: lo: Link UP Nov 08 03:50:33 onecloud systemd-networkd[287]: lo: Gained carrier Nov 08 03:50:33 onecloud systemd-networkd[287]: eth0: Found matching .network file, based on potentially unpredictable interface name: /run/systemd/network/10-netplan-all-eth-interfaces.network Nov 08 03:50:33 onecloud systemd-networkd[287]: eth0: Configuring with /run/systemd/network/10-netplan-all-eth-interfaces.network. Nov 08 03:50:33 onecloud systemd-networkd[287]: eth0: Link UP Nov 08 03:50:36 onecloud systemd-networkd[287]: eth0: Gained carrier Nov 08 03:50:36 onecloud systemd-networkd[287]: eth0: Found matching .network file, based on potentially unpredictable interface name: /run/systemd/network/10-netplan-all-eth-interfaces.network Nov 08 03:50:37 onecloud systemd-networkd[287]: eth0: DHCPv4 address 192.168.31.51/24, gateway 192.168.31.1 acquired from 192.168.31.1 Nov 08 03:50:37 onecloud systemd-timesyncd[270]: Network configuration changed, trying to establish connection. Nov 08 03:50:38 onecloud systemd-networkd[287]: eth0: Gained IPv6LL Nov 08 03:50:38 onecloud systemd-timesyncd[270]: Network configuration changed, trying to establish connection. Nov 08 03:50:38 onecloud systemd-networkd[287]: eth0: Lost carrier Nov 08 03:50:38 onecloud systemd-networkd[287]: eth0: DHCP lease lost