shell 脚本创建虚拟机并配置网卡ip地址（两个脚本）

最新推荐文章于 2025-09-05 15:04:40 发布

转载最新推荐文章于 2025-09-05 15:04:40 发布 · 653 阅读

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原文链接：http://blog.51cto.com/13587169/2091787

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#运维 #shell

本文介绍了一个用于创建KVM虚拟机的bash脚本，并演示了如何通过另一个脚本为虚拟机配置静态IP地址及设置yum源。此外，还提供了挂载虚拟机磁盘进行配置的具体步骤。

#######################脚本1:创建虚拟机kvm#########################
#!/bin/bash
qcow2_dir=/var/lib/libvirt/images
read -p "请输入虚拟机号码：" num #主机号
if [ $num -lt 9 ];then
num=0$num ##主机号
fi
if [ -z "$num" ];then
echo "错误输出"
exit 1
fi
kvm_name=host$num #主机名字
echo "正在创建镜像........"
qemu-img create -f qcow2 -b ${qcow2_dir}/rhel7.4.qcow2 ${qcow2_dir}/${kvm_name}.qcow2 &> /dev/null ###镜像文件
echo -e "\e[32;1m[ok]\e[0m"
cat /etc/libvirt/qemu/rhel7.4.xml > /etc/libvirt/qemu/${kvm_name}.xml ##描述文件
sed -i "/<name>rhel7.4/s/rhel7.4/${kvm_name}/" /etc/libvirt/qemu/${kvm_name}.xml
sed -i "/<uuid>/d" /etc/libvirt/qemu/${kvm_name}.xml
sed -i "/<source/s/rhel7.4.qcow2/${kvm_name}.qcow2/" /etc/libvirt/qemu/${kvm_name}.xml
sed -i "/<mac address=/d" /etc/libvirt/qemu/${kvm_name}.xml #删除mac地址，开机动自动生成
virsh define /etc/libvirt/qemu/${kvm_name}.xml &> /dev/null
echo "正在创建虚拟机......."
echo -e "\e[32;1m[ok]\e[0m"
####################脚本2:eth0网卡配ip地址#####################
#!/bin/bash
clear
mountpoint="/media/virimage"
#判断不存在挂载目录
[ ! -d $mountpoint ] && mkdir $mountpoint
#如果有设备挂载到该挂载点，则先umount卸载
if mount |grep -q "$mountpoint" ;then
umount $mountpoint
fi
virsh list --all
read -p "输入虚拟机名称： " name
echo "请稍后..."
#将虚拟机的磁盘文件挂载到/media/virtimage目录
guestmount -d $name -i $mountpoint
echo "---------------------------------------"
read -p "请输入要配置的ip地址: " ip
read -p "请输入要配置的子网掩码位数: " num
#静态地址
sed -i "s;(BOOTPROTO=).;\1none;" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
#开机自起
sed -i "s;(ONBOOT=).;\1yes;" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
#如果ip地址不存在，就添加ip地址
grep -q "IPADDR" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0 || echo "IPADDR=$ip" >> ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
#如果ip地址存在
sed -i "s;(IPADDR=).;\1$ip;" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
#如果子网掩码不存在，就添加子网掩码
grep -q "PREFIX" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0 || echo "PREFIX=$num" >> ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
#如果子网掩码存在
sed -i "s;(PREFIX=).;\1$num;" ${mountpoint}/etc/sysconfig/network-scripts/ifcfg-eth0
echo "ifup eth0" >> ${mountpoint}/etc/rc.d/rc.local
chmod +x ${mountpoint}/etc/rc.d/rc.local
#搭建yum源
yum_dir="/etc/yum.repos.d/rhel7.4.repo"
yum_ip="192.168.4.254"
cat > ${mountpoint}${yum_dir} << EOF
[rhel7.4]
name=rhel7.4
baseurl=http://$yum_ip/rhel7.4
enabled=1
gpgcheck=0
EOF
umount ${mountpoint}
sleep 0.5
virsh start $name