smart-os/03_run_qemu.sh
2022-10-10 13:19:13 +00:00

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#!/bin/sh
#---------------------
# 初始化公共环境
#---------------------
. ./common.sh
#---------------------
# 停掉 NAT
#---------------------
stop_nat() {
# 停掉 tap0
ip link set tap0 down
# 断开与网桥链接
brctl delif br0 tap0
# 停掉网桥
ip link set br0 down
# 删除设备 tap0
ip tuntap del mode tap tap0
# 删除网桥
brctl delbr br0
# 删除规则链
iptables -D FORWARD -s 192.168.100.0/24 -j ACCEPT
iptables -D FORWARD -d 192.168.100.0/24 -j ACCEPT
iptables -t nat -D POSTROUTING -s 192.168.100.0/24 ! -d 192.168.100.0/24 -j MASQUERADE
}
#---------------------
# 启动 NAT
#---------------------
start_nat() {
# 创建虚拟网桥
brctl addbr br0
# 创建虚拟tap设备
ip tuntap add dev tap0 mode tap
# 将tap设备介入网桥
brctl addif br0 tap0
# 配置网桥ip
ip addr add 192.168.100.1/24 dev br0
ip addr add 192.168.100.2/24 dev tap0
# 启动桥设备和虚拟网卡设备
ip link set br0 up
ip link set tap0 up
# 开启物理网卡的转发功能:
sysctl -w net.ipv4.ip_forward=1
# 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
iptables -t nat -A POSTROUTING -s 192.168.100.0/24 ! -d 192.168.100.0/24 -j MASQUERADE
# 配置iptables forward转发规则
iptables -A FORWARD -s 192.168.100.0/24 -j ACCEPT
iptables -A FORWARD -d 192.168.100.0/24 -j ACCEPT
}
#----------------------
# DNS 服务
#----------------------
start_dns() {
# 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
cat<<EOF>dnsmasq.conf
strict-order
pid-file=/var/run/dnsmasq.pid
except-interface=lo
bind-interfaces
listen-address=192.168.0.1
dhcp-range=192.168.100.2,192.168.100.254
dhcp-no-override
dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
dhcp-lease-max=253
dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
EOF
/usr/sbin/dnsmasq --conf-file=./dnsmasq.conf
}
stop_dns() {
# 停止 dhcp 服务
killall dnsmasq
}
#----------------------------------------------
# 运行 smart-os 前,先启动这个,这样就能上网了
#----------------------------------------------
start_nat
#----------------------------------------------------
# 多硬盘测试 -hdb extra.img
#----------------------------------------------------
if [ "${with_sdb}" = false ]; then
sdb_img=""
else
./mk_sdb.sh
sdb_img="-hdb extra.img"
fi
# 指定内存
memory="-m 4G"
# 主磁盘
disk="-drive format=raw,file=disk.img"
# grub 启动参数必须加上 console=ttyS0
rm -rf ./qemu.log
logfile="-serial file:./qemu.log"
# 网络参数
network="-netdev tap,id=nd0,ifname=tap0,script=no,downscript=no -device e1000,netdev=nd0"
# 显卡参数 需要编译 xf86-video-vmware, see mk_xfce.sh
display="-vga vmware"
# 启动镜像 网络对应 run_nat.sh 里面的配置 ( -enable-kvm : vmware 里面 CPU 设置需要支持虚拟化 Intel VT-x/EPT 或 AMD-V/RVI )
# 命令 qemu-system-x86_64 -device help 可以查看支持哪些设备
qemu-system-x86_64 -enable-kvm ${display} ${memory} ${disk} ${sdb_img} ${network} ${logfile}
# stop nat
stop_nat