KVM脚本整理

克隆虚拟机

vim /data/shll/clone.sh

#!/bin/bash
set -e
kvm_path=$1
original=$2
target=$3
format=$4
if [ -z "${kvm_path}" ]; then
    echo "missing kvm path"
    exit 1
fi
if [ -z "${original}" ]; then
    echo "missing original"
    exit 1
fi
if [ -z "${target}" ]; then
    echo "missing target"
    exit 1
fi
if [ -z "${format}" ]; then
    echo "missing format"
    exit 1
fi

virt-clone -d -o ${original} -n ${target} -f ${kvm_path}/${target}.${format}

使用说明：

./clone.sh 镜像目录 源 目标 镜像格式
如：./clone.sh /data/vm centos-base centos-test-1 qcow2

初始化虚拟机

vim /data/shell/init.sh

#!/bin/bash
set -e
eth0_uuid=$(uuidgen)
date=$(date "+%Y_%m_%d_%H_%M_%S")
random=$(cat /dev/urandom | head -n 10 | md5sum | head -c 10)
mount_path="/mnt/kvm_${random}_${date}"

kvm_path=$1
image=$2
format=$3
ipaddr=$4
if [ -z "${kvm_path}" ]; then
    echo "missing kvm path"
    exit 1
fi
if [ -z "${image}" ]; then
    echo "missing image"
    exit 1
fi
if [ ! -f "${kvm_path}/${image}.${format}" ]; then
    echo "no such image ${image}"
    exit 1
fi
if [ -z "${format}" ]; then
    echo "missing format"
    exit 1
fi
if [ -z "${ipaddr}" ]; then
    echo "missing ip addr"
    exit 1
fi

mkdir -p ${mount_path}
echo "mounting image ..."
guestmount -a ${kvm_path}/${image}.${format} -m /dev/centos/root ${mount_path}
echo "mount image done"
echo "creating network ..."
if [ -f "${mount_path}/etc/sysconfig/network-scripts/ifcfg-eth0" ];then
  rm -rf ${mount_path}/etc/sysconfig/network-scripts/ifcfg-eth0
fi
cat >> ${mount_path}/etc/sysconfig/network-scripts/ifcfg-eth0 <<EOF
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=no
IPV6_DEFROUTE=no
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
NETMASK=255.255.255.0
GATEWAY=10.88.36.1
DNS1=8.8.8.8
DNS2=223.5.5.5
EOF
echo "UUID=${eth0_uuid}" >> ${mount_path}/etc/sysconfig/network-scripts/ifcfg-eth0
echo "IPADDR=${ipaddr}" >> ${mount_path}/etc/sysconfig/network-scripts/ifcfg-eth0
echo "eth0 uuid ${eth0_uuid}"
echo "eth0 ip ${ipaddr}"
echo "create network done."
echo "umounting image ..."
umount ${mount_path}
echo "umount image done."
rm -rf ${mount_path}
echo "all done."
exit 0

使用说明：

./init.sh 镜像目录 镜像名 镜像格式 初始化IP
如：./init.sh /data/vm centos-test-1 qcow2 10.88.36.150

检测网段IP占用情况

#!/bin/bash
network_number=192.168.1
start_time=$(date +%s)
echo "*********Running ...**********"
for ((i = 0; i <= 255; i++)); do
{
    ping ${network_number}.$i -c 2 | grep -q "ttl=" && echo "${network_number}.$i yes" >> ipyes.txt || echo "${network_number}.$i no" >> ipno.txt
} &
done
wait

end_time=$(date +%s)
echo $end_time
echo "*************Spent Time:$(expr $end_time - $start_time)**************"