将Ubuntu18.04VM连接到虚拟盒Nat网络

Question

我正在尝试使用VirtualBox Nat网络建立一个虚拟机网络。有些vms，特别是一个由coreos盒和元可拓组成的集群，连接得很好。其他的，特别是我自己设置的任何Ubuntu都不会。

nat网络设置如下

$ VBoxManage natnetwork list fabian
NAT Networks:

Name:        fabian
Network:     172.17.8.0/24
Gateway:     172.17.8.1
IPv6:        No
Enabled:     Yes

我尝试的是编辑Ubuntu /etc/network/interfaces文件，以便按如下方式读取

# interface(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

# network interface
auto enp0s3
iface enp0s3 inet dhcp

(这部分基于metasploitable的/etc/network/interfaces文件，这是一个基于ubuntu的vm，它似乎很好地连接到网络上)

但是，当我尝试运行$ sudo systemctl restart networking时，它会挂起并超时。我在下面包含了$ journalctl -xe的输出。在我所包含的内容之前有一些条目，但是它们似乎是具有不同间隔的相同的消息。

在连接网络接口的过程中，我有什么遗漏吗？

Oct 23 10:22:49 burp-vm systemd-resolved[290]: Using degraded feature set (UDP) for DNS server 8.8.8.8.
Oct 23 10:22:52 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 20 (xid=0x6914771e)
Oct 23 10:22:52 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 20 (xid=0x6914771e)
Oct 23 10:22:54 burp-vm systemd-resolved[290]: Using degraded feature set (UDP) for DNS server 8.8.4.4.
Oct 23 10:23:12 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 9 (xid=0x6914771e)
Oct 23 10:23:12 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 9 (xid=0x6914771e)
Oct 23 10:23:21 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 9 (xid=0x6914771e)
Oct 23 10:23:21 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 9 (xid=0x6914771e)
Oct 23 10:23:30 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:23:30 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:23:42 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:23:42 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:23:54 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 11 (xid=0x6914771e)
Oct 23 10:23:54 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 11 (xid=0x6914771e)
Oct 23 10:24:05 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 15 (xid=0x6914771e)
Oct 23 10:24:05 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 15 (xid=0x6914771e)
Oct 23 10:24:20 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 21 (xid=0x6914771e)
Oct 23 10:24:20 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 21 (xid=0x6914771e)
Oct 23 10:24:39 burp-vm systemd-resolved[290]: Using degraded feature set (TCP) for DNS server 8.8.8.8.
Oct 23 10:24:39 burp-vm systemd-resolved[290]: Using degraded feature set (TCP) for DNS server 8.8.4.4.
Oct 23 10:24:41 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 7 (xid=0x6914771e)
Oct 23 10:24:41 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 7 (xid=0x6914771e)
Oct 23 10:24:48 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:24:48 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:25:00 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 10 (xid=0x6914771e)
Oct 23 10:25:00 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 10 (xid=0x6914771e)
Oct 23 10:25:10 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:25:10 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 12 (xid=0x6914771e)
Oct 23 10:25:22 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 11 (xid=0x6914771e)
Oct 23 10:25:22 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 11 (xid=0x6914771e)
Oct 23 10:25:33 burp-vm dhclient[1889]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 3 (xid=0x6914771e)
Oct 23 10:25:33 burp-vm ifup[1867]: DHCPDISCOVER on enp0s3 to 255.255.255.255 port 67 interval 3 (xid=0x6914771e)
Oct 23 10:25:35 burp-vm systemd[1]: networking.service: Start operation timed out. Terminating.
Oct 23 10:25:35 burp-vm systemd[1]: networking.service: Main process exited, code=killed, status=15/TERM
Oct 23 10:25:35 burp-vm systemd[1]: networking.service: Failed with result 'timeout'.
Oct 23 10:25:35 burp-vm systemd[1]: Failed to start Raise network interfaces.

Answer 1

从Ubuntu17.10开始，ifupdown被认为是一个不受欢迎的工具，并被netplan所取代。要使用/etc/network/interfaces，应该安装ifupdown包。

在您的情况下，您应该使用netplan工具配置网络：

配置文件可以在/etc/netplan/下找到。创建/编辑*.yaml文件如下：

network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: true

如果安装了网络管理器，可以用renderer: networkd替换renderer: NetworkManager。

然后跑：

sudo netplan generate
sudo netplan apply

请参见：

Netplan配置示例

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