我在 OVH 专用服务器上的 Ubuntu Server 14.04 LTS 上安装了 KVM。
我无法通过 ssh 连接到我的虚拟主机。
My server IP: AAA.AAA.AAA.AAA
My Failover IP: BBB.BBB.BBB.BBB
我在服务器上的配置
是否配置
br0 Link encap:Ethernet HWaddr 00:25:90:dd:35:6e
inet addr:AAA.AAA.AAA.AAA Bcast:AAA.AAA.AAA.255 Mask:255.255.255.0
inet6 addr: fe80::225:90ff:fedd:356e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3856 errors:0 dropped:0 overruns:0 frame:0
TX packets:303 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:248725 (248.7 KB) TX bytes:38262 (38.2 KB)
eth0 Link encap:Ethernet HWaddr 00:25:90:dd:35:6e
inet6 addr: fe80::225:90ff:fedd:356e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3922 errors:0 dropped:5 overruns:0 frame:0
TX packets:323 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:308221 (308.2 KB) TX bytes:39990 (39.9 KB)
Memory:fb720000-fb740000
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:76 errors:0 dropped:0 overruns:0 frame:0
TX packets:76 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9066 (9.0 KB) TX bytes:9066 (9.0 KB)
猫/等/网络/接口
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet static
address AAA.AAA.AAA.AAA
netmask 255.255.255.0
network AAA.AAA.AAA.0
broadcast AAA.AAA.AAA.255
gateway AAA.AAA.AAA.254
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
vm 使用以下方式创建
sudo ubuntu-vm-builder kvm trusty \
--domain test \
--dest test \
--arch amd64 \
--hostname test \
--mem 256 \
--user john \
--pass doe \
--bridge=br0 \
--ip BBB.BBB.BBB.BBB \
--mask 255.255.255.0 \
--bcast BBB.BBB.BBB.BBB \
--gw AAA.AAA.AAA.254 \
--dns 213.186.33.99 \
--components main,universe \
--addpkg acpid \
--addpkg openssh-server \
--addpkg avahi-daemon \
--addpkg linux-image-generic \
--addpkg bridge-utils \
--libvirt qemu:///system
brctl 显示macs br0
port no mac addr is local? ageing timer
1 00:00:0c:07:ac:02 no 2.50
1 00:05:73:a0:00:01 no 1.84
1 00:25:90:22:ad:82 no 17.36
1 00:25:90:7d:18:b8 no 25.91
1 00:25:90:dd:30:87 no 2.98
1 00:25:90:dd:35:6e yes 0.00
1 00:ff:ff:ff:ff:fd no 0.07
1 00:ff:ff:ff:ff:fe no 0.00
1 00:ff:ff:ff:ff:ff no 2.24
1 a8:0c:0d:01:69:45 no 0.60
virsh 编辑测试
<domain type='kvm'>
<name>test</name>
<uuid>27dcd092-9770-47f7-b613-2e0f94adcced</uuid>
<memory unit='KiB'>262144</memory>
<currentMemory unit='KiB'>262144</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/root/test/tmp342OQf.qcow2'/>
<target dev='hda' bus='ide'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:18:ea:57'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
<listen type='address' address='127.0.0.1'/>
</graphics>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</memballoon>
</devices>
</domain>
virsh 编辑默认
<network>
<name>default</name>
<uuid>a962a950-17f3-48eb-b91b-9e71ef8a1247</uuid>
<forward mode='nat'>
<nat>
<port start='1024' end='65535'/>
</nat>
</forward>
<bridge name='br0' stp='on' delay='0'/>
<mac address='52:54:00:4d:b5:0d'/>
<ip address='AAA.AAA.AAA.AAA' netmask='255.255.255.0'>
<dhcp>
<range start='BBB.BBB.BBB.1' end='BBB.BBB.BBB.23'/>
</dhcp>
</ip>
</network>
路由
default via AAA.AAA.AAA.254 dev br0
AAA.AAA.AAA.0/24 dev br0 proto kernel scope link src AAA.AAA.AAA.AAA
猫/etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv6.conf.all.autoconf = 0
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.eth0.autoconf = 0
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.default.accept_ra = 0
net.ipv6.conf.eth0.accept_ra = 0
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
ARP表项
Address HWtype HWaddress Flags Mask Iface
AAA.AAA.AAA.250 ether 00:25:90:22:ad:82 C br0
AAA.AAA.AAA.254 ether 00:ff:ff:ff:ff:ff C br0
答案1
您需要在 OVH 管理器中为故障转移 IP 生成虚拟 MAC 地址，然后将该 MAC 地址分配给虚拟机的 NIC。OVH 不允许具有任意 MAC 地址的设备在其网络上进行通信。
虚拟机应该使用桥接网络，而不是“默认”的 NAT 网络（这样的虚拟机可以与互联网通信，但无法从外部访问）。
<interface type='bridge'>
<mac address='00:50:56:04:bc:ce'/>
<source bridge='br0'/>