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KVM安装OpenWrt桥接到无线网络

Author: 吕玮亮 mail@tierama.com

Date: 2022/10/08

OS version: CentOS Stream 8

下载OpenWrt固件

OpenWrt官网地址: https://openwrt.org/zh/downloads

固件下载地址: https://downloads.openwrt.org/releases/

找到最新版的固件, 我这里选择的是: https://downloads.openwrt.org/releases/22.03.0-rc6/targets/x86/64/openwrt-22.03.0-rc6-x86-64-generic-ext4-combined.img.gz

下载后先解压缩:

$ gzip -d openwrt-22.03.0-rc6-x86-64-generic-ext4-combined.img.gz

创建网桥

创建名为br0的网桥

# nmcli connection add type bridge con-name br0 ifname br0 autoconnect yes

创建slave; eno1是连接主路由器的物理网卡:

# nmcli connection add type bridge-slave ifname eno1 master br0

确认这个br0要up:

# nmcli connection up br0

此时eno1的ip地址会跳到br0上

$ ip a

2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000

link/ether 3c:7c:3f:d4:9a:af brd ff:ff:ff:ff:ff:ff

altname enp0s31f6

23: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000

link/ether 3c:7c:3f:d4:9a:af brd ff:ff:ff:ff:ff:ff

inet 192.168.3.13/24 brd 192.168.3.255 scope global noprefixroute br0

valid_lft forever preferred_lft forever

inet 192.168.3.200/24 brd 192.168.3.255 scope global secondary dynamic noprefixroute br0

valid_lft 47771sec preferred_lft 47771sec

inet6 fdf0:bbac:f568::80d/128 scope global dynamic noprefixroute

valid_lft 33464sec preferred_lft 33464sec

inet6 fde0:e0fc:af4e:9500:c140:cf93:1cfc:d2a8/64 scope global dynamic noprefixroute

valid_lft 7157sec preferred_lft 3557sec

inet6 fdf0:bbac:f568:0:c030:dd12:f2cb:8ad9/64 scope global noprefixroute

valid_lft forever preferred_lft forever

inet6 fe80::7587:f97e:6740:aefe/64 scope link noprefixroute

valid_lft forever preferred_lft forever

创建虚拟网络

“default”网络

当libvirt正在使用并且libvirtd守护进程正在运行时,会创建一个default网络。我们可以使用virsh命令验证该网络是否存在:

# virsh net-list –all

Name State Autostart Persistent

——————————————–

default active yes yes

编辑default网络

$ sudo virsh net-edit default

<network>

<name>default</name>

<uuid>277b0b7f-a6f3-4c83-bb3b-7b5fe6f2a890</uuid>

<forward mode='nat'/>

<bridge name='virbr0' stp='on' delay='0'/>

<mac address='52:54:00:4a:2e:26'/>

<ip address='192.168.122.1' netmask='255.255.255.0'>

<dhcp>

<range start='192.168.122.2' end='192.168.122.254'/>

</dhcp>

</ip>

</network>

正如所看到的,default网络基于使用virbr0虚拟网桥,并使用基于NAT的连接将虚拟机连接到外网。

不应该向virbr0网桥添加任何物理接口,因为它使用NAT提供连接

此时,应该定义一个供虚拟机使用的新“网络”。使用最喜爱的编辑器打开一个文件,并将以下内容粘贴到其中,然后将其保存为bridged-network.xml:

# vi bridged-network.xml

<network>

<name>bridged-network</name>

<forward mode="bridge" />

<bridge name="br0" />

</network>

创建虚拟网络:

# virsh net-define bridged-network.xml

# virsh net-start bridged-network

# virsh net-autostart bridged-network

# virsh net-list

创建KVM虚拟机

新建一个虚拟机, 名为openwrt:

使用–network选项时,我们可以按名称选择网络. path=修改为固件路径, cpu内存根据实际情况

# virt-install –name=openwrt –ram=1024 –vcpus=1 –os-type=linux \

–disk path=openwrt-22.03.0-x86-64-generic-ext4-combined.img,bus=ide \

–network network=bridged-network \

–import –noautoconsole –graphics vnc,listen=0.0.0.0,password=000000

Vnc控制台进入虚拟机, 我这里用的是cockpit:

# systemctl start cockpit

浏览器打开: http://192.168.3.200:9090

Cockpit界面

开机提示修改密码

修改openwrt的eth0接口的ip为桥接到无线路由器的网段, 也就是dhcp client ip.

我这里无线主路由器是192.168.3.1, openwrt的eth0则配置了dhcp, 自动获取到了192.168.3.218

root@OpenWrt:~# cat /etc/config/network

config interface 'loopback'

option device 'lo'

option proto 'static'

option ipaddr '127.0.0.1'

option netmask '255.0.0.0'

config globals 'globals'

option ula_prefix 'fdf0:bbac:f568::/48'

config device

option name 'br-lan'

option type 'bridge'

list ports 'eth0'

config interface 'lan'

option device 'eth0'

option proto 'dhcp'

root@OpenWrt:~# service network restart

浏览器打开: http://192.168.3.128

关闭dhcp服务,

安装clash

GitHub: https://github.com/vernesong/OpenClash

从release里下载安装包, 和他给的安装步骤差不多, 但会报错要先uninstall dnsmasq

root@OpenWrt:~# opkg update

root@OpenWrt:~# opkg uninstall dnsmasq

root@OpenWrt:~# opkg install coreutils-nohup bash dnsmasq-full curl ca-certificates ipset ip-full libcap libcap-bin ruby ruby-yaml kmod-tun kmod-inet-diag unzip kmod-nft-tproxy luci-compat luci luci-base

root@OpenWrt:~# opkg install luci-app-openclash_0.45.59-beta_all.ipk

重启OpenWrt, 继续其他配置

客户端设置

l 方法1手机和PC可以把网关地址设置192.168.3.218

l 方法2修改无线主路由器的dhcp, 直接分配网关为192.168.3.218

KVM安装OpenWrt桥接到无线网络插图

原文链接:https://www.bilibili.com/read/cv18972722/

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