mirror of
https://github.com/superconvert/smart-os.git
synced 2025-02-09 08:15:37 +08:00
82 lines
2.0 KiB
Bash
82 lines
2.0 KiB
Bash
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#!/bin/sh
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#---------------------
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# 停掉 NAT
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#---------------------
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stop() {
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# 停掉 tap0
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ip link set tap0 down
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# 断开与网桥链接
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brctl delif br0 tap0
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# 停掉网桥
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ip link set br0 down
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# 删除设备 tap0
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ip tuntap del mode tap tap0
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# 删除网桥
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brctl delbr br0
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}
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#---------------------
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# 启动 NAT
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#---------------------
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start() {
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# 创建虚拟网桥
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brctl addbr br0
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# 创建虚拟tap设备
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ip tuntap add dev tap0 mode tap
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# 将tap设备介入网桥
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brctl addif br0 tap0
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# 配置网桥ip
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ip addr add 192.168.100.1/24 dev br0
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ip addr add 192.168.100.2/24 dev tap0
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# 启动桥设备和虚拟网卡设备
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ip link set br0 up
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ip link set tap0 up
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# 配置iptables forward转发规则
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# 在基本环境搭建这一节中，设置了一个本地网络，虚机只能访问host，无法访问外网，如果需要访问外网需要设置SNAT
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iptables -t nat -A POSTROUTING -s 192.168.100.0/24 ! -d 192.168.100.0/24 -j MASQUERADE
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# 开启物理网卡的转发功能:
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sysctl -w net.ipv4.ip_forward=1
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# 如果有防火墙的，特别是centos系统中，记得放开防火墙
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iptables -A FORWARD -s 192.168.100.0/24 -j ACCEPT
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}
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#----------------------
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# DNS 服务
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#----------------------
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start_dns() {
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# 准备dnsmasq配置文件,启动dnsmasq服务，这样就能为虚拟机自动分配IP了
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cat<<EOF>dnsmasq.conf
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strict-order
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pid-file=/var/run/dnsmasq.pid
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except-interface=lo
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bind-interfaces
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listen-address=192.168.0.1
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dhcp-range=192.168.100.2,192.168.100.254
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dhcp-no-override
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dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
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dhcp-lease-max=253
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dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
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addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
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EOF
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/usr/sbin/dnsmasq --conf-file=./dnsmasq.conf
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}
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stop_dns() {
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# 杀掉 dhcp 服务
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killall dnsmasq
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}
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#----------------------------------------------
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# 运行 smart-os 前，先启动这个，这样就能上网了
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#----------------------------------------------
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if [ -n "$1" ];then
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stop
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echo "stop"
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else
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start
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echo "start"
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fi
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