我正在尝试使用 VirtualBox 实例配置一个虚拟集群，然后运行另一个虚拟机（该虚拟机使用 QEMU 创建）。
下图描述了当前设置，其中我的本地网络是 192.168.3.0/24，运行 VirtualBox 的计算机是 192.168.3.30：
在 VirtualBox 中，我启动了 2 台主机，它们在 VirtualBox 中配置了自己的内部网，并配有专用 NIC 连接到 NAT 网络 192.168.1.0/24。
虽然所有节点都在同一个网络 192.168.1.0/24 中，但是嵌套的客户机 (Vec) 无法与远程主机或 vecs（红色交叉线）通信，但同一主机内的 host-host 和 host-vec 可以通信。
我应该如何配置集群以使它们全部进行通信？
/etc/hosts
192.168.1.1 host1
192.168.1.101 vec1
192.168.1.2 host2
192.168.1.102 vec2
192.168.1.3 host3
192.168.1.103 vec3
主机1$ ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::a00:27ff:fe3e:1348 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:3e:13:48 txqueuelen 1000 (Ethernet)
RX packets 58 bytes 4608 (4.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 156 bytes 10438 (10.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.3.2 netmask 255.255.255.0 broadcast 192.168.3.255
inet6 fe80::e22:2cf6:8579:39a3 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:fa:c6:ca txqueuelen 1000 (Ethernet)
RX packets 1169 bytes 94446 (92.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1778 bytes 207624 (202.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.1 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 fe80::a00:27ff:fe3e:1348 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:3e:13:48 txqueuelen 1000 (Ethernet)
RX packets 11 bytes 632 (632.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 29 bytes 1990 (1.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 155 bytes 13078 (12.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 155 bytes 13078 (12.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
tap0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::f81f:daff:fe5c:f05a prefixlen 64 scopeid 0x20<link>
ether fa:1f:da:5c:f0:5a txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2 bytes 144 (144.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
host1$ 路线
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default host1 0.0.0.0 UG 0 0 0 eth0
default _gateway 0.0.0.0 UG 101 0 0 enp0s8
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.3.0 0.0.0.0 255.255.255.0 U 101 0 0 enp0s8
vec1$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::99a6:f5d6:71e4:a028 prefixlen 64 scopeid 0x20<link>
inet6 fec0::678f:ac2f:8ada:2d1b prefixlen 64 scopeid 0x40<site>
ether 52:54:00:12:34:56 txqueuelen 1000 (Ethernet)
RX packets 65 bytes 9318 (9.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 109 bytes 12408 (12.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.101 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::3aca:9bbc:c0c2:b316 prefixlen 64 scopeid 0x20<link>
ether 52:54:00:12:34:57 txqueuelen 1000 (Ethernet)
RX packets 177 bytes 17301 (16.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 99 bytes 13429 (13.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 56 bytes 4308 (4.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 56 bytes 4308 (4.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vec1$ 路线
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default _gateway 0.0.0.0 UG 100 0 0 eth0
default host1 0.0.0.0 UG 101 0 0 eth1
10.0.2.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 101 0 0 eth1
host2$ ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::a00:27ff:fee0:d7cc prefixlen 64 scopeid 0x20<link>
ether 08:00:27:e0:d7:cc txqueuelen 1000 (Ethernet)
RX packets 1911 bytes 145413 (142.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1909 bytes 284175 (277.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.2 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 fe80::a00:27ff:fee0:d7cc prefixlen 64 scopeid 0x20<link>
ether 08:00:27:e0:d7:cc txqueuelen 1000 (Ethernet)
RX packets 1646 bytes 105269 (102.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1722 bytes 265083 (258.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 76 bytes 5018 (4.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76 bytes 5018 (4.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
tap0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::f81f:daff:fe5c:f05a prefixlen 64 scopeid 0x20<link>
ether fa:1f:da:5c:f0:5a txqueuelen 1000 (Ethernet)
RX packets 75 bytes 8965 (8.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 105 bytes 12449 (12.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
host2$ 路线
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default host1 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
vec2$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::99a6:f5d6:71e4:a028 prefixlen 64 scopeid 0x20<link>
inet6 fec0::678f:ac2f:8ada:2d1b prefixlen 64 scopeid 0x40<site>
ether 52:54:00:12:34:56 txqueuelen 1000 (Ethernet)
RX packets 16 bytes 1888 (1.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 64 bytes 8654 (8.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.102 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::4e5e:dfc8:2e9f:6072 prefixlen 64 scopeid 0x20<link>
ether 52:54:00:12:34:57 txqueuelen 1000 (Ethernet)
RX packets 154 bytes 16347 (15.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 131 bytes 15713 (15.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 76 bytes 7162 (6.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76 bytes 7162 (6.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vec2$ 路线
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default _gateway 0.0.0.0 UG 100 0 0 eth0
default host1 0.0.0.0 UG 101 0 0 eth1
10.0.2.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 101 0 0 eth1