KVM，OVS，桥接网络 . 如何配置？-Java 学习之路

我'm completely new to KVM and bridging and need your help. I have a remote server with QEMU/KVM and only SSH connection is available to me. Host OS is RHEL 7. Guests must be connected to bridge(ovs), they see each other and don't可以访问外部网络 . 主机必须可以ping客人 . 物理网卡接口不能像主机那样查看来宾的每个虚拟接口，并且可以访问它们，并且客人可以通过网桥看到对方 . 我使用libvirt尝试按照此指令How to Use Open vSwitch with Libvirt配置它 . 请帮帮我 .

首先我需要创建桥：

sudo ovs-vsctl add-br ovsbr

然后我使用virsh配置域XML文件，如下所示：

<interface type='bridge'>
    <mac address='52:54:00:71:b1:b6'/>
    <source bridge='ovsbr'/>
    <virtualport type='openvswitch'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
  </interface>

重新启动域桥后连接了guest虚拟机接口的vnet0接口 . 在这种情况下如何提供寻址？我可以通过主机给客人提供静态地址吗？

1 回答

创建网络接口：

# cat /etc/sysconfig/network-scripts/ifcfg-br-int 
DEVICE=br-int
ONBOOT=yes
DEVICETYPE=ovs
TYPE=OVSBridge
BOOTPROTO=static
HOTPLUG=no
IPADDR=10.17.0.1
NETMASK=255.255.255.0

接口：

# ifup br-int

它创建了openvswitch桥 .

# ip -4 a show br-int
5: br-int: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default 
inet 10.17.0.1/24 brd 10.17.0.255 scope global br-int
   valid_lft forever preferred_lft forever

创建一个libvirt网络：

# cat ovsnet.xml 
<network>
  <name>br-int</name>
  <forward mode='bridge'/>
  <bridge name='br-int'/>
  <virtualport type='openvswitch'/>
</network>

定义并启动网络：

# virsh net-define ovsnet.xml
# virsh net-start br-int
# virsh net-autostart br-int

创建vm：

# qemu-img create -f qcow2 /opt/vm/test.qcow2 10G
# virt-install \
  --ram 1024 \
  --accelerate \
  --disk path=/opt/vm/test.qcow2 \
  --name test \
  --network network:br-int \
  --vcpus 1 \
  --cpu core2duo \
  --cdrom /opt/iso/CentOS-7.0-1406-x86_64-DVD.iso

完成安装，登录新虚拟机并配置网络：

# cat /etc/sysconfig/network-scripts/ifcfg-ens3 
DEVICE=ens3
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.17.0.2
NETMASK=255.255.255.0
GATEWAY=10.17.0.1

Up网络接口：

# ifup ens3

检查来自主机的ping：

# ping 10.17.0.2 -c 1
PING 10.17.0.2 (10.17.0.2) 56(84) bytes of data.
64 bytes from 10.17.0.2: icmp_seq=1 ttl=64 time=0.398 ms 

--- 10.17.0.2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.398/0.398/0.398/0.000 ms

当前的openvswitch配置：

# ovs-vsctl show
73826453-249b-4558-9cf9-ad6cc169dec9
    Bridge br-int
        Port br-int
            Interface br-int
               type: internal
        Port "vnet0"
            Interface "vnet0"
    ovs_version: "2.3.1-git4750c96"

回复于 2024-04-28T04:35:47+08:00

KVM，OVS，桥接网络 . 如何配置？

1 回答

相关问题