MirageOS和Xen - 虚拟接口无法获取IP地址

Question

我编译并构建了一个MirageOS unikernel for XEN，遵循本指南https://github.com/mirage/mirage-www/blob/master/tmpl/wiki/hello-world.md（主要是最后一部分，第4步，stackv4），但是启动之后，我不是能够通过DHCP发现阶段，如图以下日志：

Parsing config from stackv4.xl 
Xen Minimal OS! 
Initialising console ... done. 
getenv(OCAMLRUNPARAM) -> null 
getenv(CAMLRUNPARAM) -> null 
getenv(PATH) -> null 
Unsupported function lseek called in Mini-OS kernel 
Unsupported function lseek called in Mini-OS kernel 
Unsupported function lseek called in Mini-OS kernel 
getenv(OCAMLRUNPARAM) -> null 
getenv(CAMLRUNPARAM) -> null 
getenv(TMPDIR) -> null 
getenv(TEMP) -> null 
Netif: add resume hook 
Netif.connect 0 
Netfront.create: id=0 domid=0 
sg:true gso_tcpv4:true rx_copy:true rx_flip:false smart_poll:false 
MAC: 00:16:3e:7e:c0:0d 
Attempt to open(/dev/urandom)! 
Unsupported function getpid called in Mini-OS kernel 
Unsupported function getppid called in Mini-OS kernel 
Manager: connect 
Manager: configuring 
DHCP: start discovery 

Sending DHCP broadcast (length 552) 
DHCP: start discovery 

Sending DHCP broadcast (length 552) 
DHCP: start discovery 

Sending DHCP broadcast (length 552) 
DHCP: start discovery 

.... 

我MirageOS unikernel配置：

name = 'stackv4' 
kernel = '/home/mirage/mirage-skeleton/stackv4/mir-stackv4.xen' 
builder = 'linux' 
memory = 256 
on_crash = 'preserve' 

disk = [ ] 

# if your system uses openvswitch then either edit /etc/xen/xl.conf and set 
#  vif.default.script="vif-openvswitch" 
# or add "script=vif-openvswitch," before the "bridge=" below: 
vif = [ 'bridge=xenbr0' ] 

我的网络配置：

eth0  Link encap:Ethernet HWaddr 02:01:06:02:83:c0 
      inet6 addr: fe80::1:6ff:fe02:83c0/64 Scope:Link 
      UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
      RX packets:110876 errors:0 dropped:0 overruns:0 frame:0 
      TX packets:14602 errors:0 dropped:0 overruns:0 carrier:0 
      collisions:0 txqueuelen:1000 
      RX bytes:9736700 (9.7 MB) TX bytes:1999992 (1.9 MB) 
      Interrupt:117 

lo  Link encap:Local Loopback 
      inet addr:127.0.0.1 Mask:255.0.0.0 
      inet6 addr: ::1/128 Scope:Host 
      UP LOOPBACK RUNNING MTU:65536 Metric:1 
      RX packets:384394 errors:0 dropped:0 overruns:0 frame:0 
      TX packets:384394 errors:0 dropped:0 overruns:0 carrier:0 
      collisions:0 txqueuelen:0 
      RX bytes:26761500 (26.7 MB) TX bytes:26761500 (26.7 MB) 

vif16.0 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff 
      inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link 
      UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
      RX packets:58 errors:0 dropped:0 overruns:0 frame:0 
      TX packets:11289 errors:0 dropped:0 overruns:0 carrier:0 
      collisions:0 txqueuelen:32 
      RX bytes:33640 (33.6 KB) TX bytes:778590 (778.5 KB) 

xenbr0 Link encap:Ethernet HWaddr 02:01:06:02:83:c0 
      inet addr:131.159.24.167 Bcast:131.159.25.255 Mask:255.255.254.0 
      inet6 addr: fe80::1:6ff:fe02:83c0/64 Scope:Link 
      UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
      RX packets:110689 errors:0 dropped:0 overruns:0 frame:0 
      TX packets:11987 errors:0 dropped:0 overruns:0 carrier:0 
      collisions:0 txqueuelen:0 
      RX bytes:8328727 (8.3 MB) TX bytes:1703101 (1.7 MB) 

我的桥配置：

bridge name  bridge id    STP enabled  interfaces 
xenbr0   8000.0201060283c0  no    eth0 
                 vif16.0 

我的/ etc /网络/接口：

auto lo 
iface lo inet loopback 

auto eth0 
#iface eth0 inet dhcp 
# up ip link set eth0 up 

iface eth0 inet manual 

auto xenbr0 
    iface xenbr0 inet dhcp 
      bridge_ports eth0 

我想明白了什么是问题，但一切似乎都是正确的（根据其他指南http://wiki.xen.org/wiki/Network_Configuration_Examples_(Xen_4.1%2B)#Example_Debian-style_bridge_configuration_.28e.g._Debian.2C_Ubuntu.29）。

Answer 1

几点建议：

1. 检查你的确在DHCP服务器。
2. 运行tcpdump或wireshark桥机（可能是dom0），看看有什么流量。你看到DHCP请求吗？
3. 尝试配置一个静态IP地址，看看是否有效。
4. 尝试运行Linux guest并查看DHCP是否在那里工作（并比较数据包捕获）。