不要跟我讲什么VXLAN、SDN,

老夫搞了十几年网络就是‘一把梭’,配VLAN、默认路由,Permit any any,插上console就是干,通了就走!

Centos7环境下全自动创建kvm虚拟机

1、自动配置外网、内网ip
2、自动设置主机名
3、自动扩容数据盘
4、可预设定vnc、root密码
5、需要注意的是:模板磁盘格式只能使用raw

 

#!/bin/bash
#centos6,7 模板数据盘都是10G

export PATH=”/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin”

dateTime=$(date +%Y%m%d%H%M%S)
tmpDiskFile6_os=”/vmdata/template/centos64_os”
tmpDiskFile6_data=”/vmdata/template/centos64_data”
tmpDiskFile7_os=”/vmdata/template/centos7_os”
tmpDiskFile7_data=”/vmdata/template/centos7_data”
vmDir=”/vmdata”
test -d $vmDir || mkdir -p $vmDir

help() {
cat >> /dev/stdout <<EOF
Usage: $(basename $0) vmname vcpu memory ip [TempleteDiskFile] | -h
Example: ./$(basename $0) vmname=ebs-1 vcpu=1 memory=1024M datasize=20 ip=192.168.199.70 ostype=centos6
Example: ./$(basename $0) vmname=ebs-2 vcpu=1 memory=1024M datasize=20 ip=192.168.199.71 ostype=centos7
Example: ./$(basename $0) -h //print help infomations
EOF
}

error() {
echo -e “input parameter error: $1 \n please try again!”
}

if [[ “$#” -eq 0 || “$1” == “-h” ]]; then
help
exit 0
fi

for line in $@
do
case $line in
vmname*)
vmName=$(echo $line | awk -F “=” ‘{print $2}’)
;;
vcpu*)
vCpu=$(echo $line | awk -F “=” ‘{print $2}’)
if ! echo $vCpu | grep ‘^[0-9]$’ > /dev/null; then
error $line
help
exit 1
fi
;;
memory*)
memTmp=$(echo $line | awk -F “=” ‘{print $2}’)
memNum=$(echo ${memTmp:0:${#memTmp}-1})
memUnit=$(echo ${memTmp:0-1} | tr ‘[a-z]’ ‘[A-Z]’)
if ! echo $memNum | grep ‘[0-9]’ > /dev/null; then
error $line
help
exit 1
fi
if [[ “$memUnit” != “G” && “$memUnit” != “M” && “$memUnit” != “K” ]]; then
error $line
help
exit 1
fi
;;
datasize*)
datasize=$(echo $line | awk -F “=” ‘{print $2}’)
if ! echo $datasize | grep ‘^[0-9]’ > /dev/null; then
error $line
help
exit 1
fi
;;
ip*)
vmIp=$(echo $line | awk -F “=” ‘{print $2}’)
if ! echo $vmIp | grep ‘[0-9]\{1,3\}\(\.[0-9]\{1,3\}\)\{3\}’ > /dev/null; then
error $line
help
exit 1
fi
;;
ostype*)
ostype=$(echo $line | awk -F “=” ‘{print $2}’)
[ $ostype == “centos6” ] && echo “you chose centos6” && diskFile=$tmpDiskFile6_os && diskFile1=$tmpDiskFile6_data
[ $ostype == “centos7” ] && echo “you chose centos7” && diskFile=$tmpDiskFile7_os && diskFile1=$tmpDiskFile7_data
if [ ! -f “$diskFile” ] || [ ! -f “$diskFile1” ] ; then
error $line
help
exit 1
fi
;;
*)
error $line
help
exit 1
;;
esac
done

if [ -z “$vmName” ] || [ -z “$vCpu” ] || [ -z “$memNum” ] || [ -z “$vmIp” ];
then
echo -e “input parameter incomplete: $@”
help
exit 1
fi

read -p “please input vnc passwd:” vncpasswd
if [ -z $vncpasswd ] ;then
vncpasswd=`echo $RANDOM|md5sum|cut -c 1-6`
fi
create_config() {
memUnit=”$memUnit”iB
cat > $vmDir/$vmName/$vmName.xml <<EOF
<domain type=’kvm’>
<name>$vmName</name>
<uuid>$vmUuid</uuid>
<memory unit=’$memUnit’>$memNum</memory>
<currentMemory unit=’$memUnit’>$memNum</currentMemory>
<vcpu placement=’static’>$vCpu</vcpu>
<os>
<type arch=’x86_64′ machine=’pc-i440fx-rhel7.0.0′>hvm</type>
<boot dev=’cdrom’/>
<boot dev=’hd’/>
<bootmenu enable=’yes’/>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset=’utc’>
<timer name=’rtc’ tickpolicy=’catchup’/>
<timer name=’pit’ tickpolicy=’delay’/>
<timer name=’hpet’ present=’no’/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled=’no’/>
<suspend-to-disk enabled=’no’/>
</pm>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type=’file’ device=’disk’>
<driver name=’qemu’ type=’qcow2’/>
<source file=’$vmDir/$vmName/${vmNameos}.qcow2’/>
<target dev=’vda’ bus=’virtio’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x06′ function=’0x0’/>
</disk>
<disk type=’file’ device=’disk’>
<driver name=’qemu’ type=’qcow2’/>
<source file=’$vmDir/$vmName/${vmNamedata}.qcow2’/>
<target dev=’vdb’ bus=’virtio’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x16′ function=’0x0’/>
</disk>
<disk type=’file’ device=’cdrom’>
<driver name=’qemu’ type=’raw’/>
<target dev=’hda’ bus=’ide’/>
<readonly/>
<address type=’drive’ controller=’0′ bus=’0′ target=’0′ unit=’0’/>
</disk>
<controller type=’usb’ index=’0′ model=’ich9-ehci1′>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x05′ function=’0x7’/>
</controller>
<controller type=’usb’ index=’0′ model=’ich9-uhci1′>
<master startport=’0’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x05′ function=’0x0′ multifunction=’on’/>
</controller>
<controller type=’usb’ index=’0′ model=’ich9-uhci2′>
<master startport=’2’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x05′ function=’0x1’/>
</controller>
<controller type=’usb’ index=’0′ model=’ich9-uhci3′>
<master startport=’4’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x05′ function=’0x2’/>
</controller>
<controller type=’pci’ index=’0′ model=’pci-root’/>
<controller type=’ide’ index=’0′>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x01′ function=’0x1’/>
</controller>
<controller type=’virtio-serial’ index=’0′>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x04′ function=’0x0’/>
</controller>
<interface type=’bridge’>
<mac address=’$vmMac’/>
<source bridge=’br0’/>
<model type=’virtio’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x03′ function=’0x0’/>
</interface>
<interface type=’bridge’>
<mac address=’$vmMac1’/>
<source bridge=’br1’/>
<model type=’virtio’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x13′ function=’0x0’/>
</interface>
<serial type=’pty’>
<target port=’0’/>
</serial>
<console type=’pty’>
<target type=’serial’ port=’0’/>
</console>
<channel type=’unix’>
<target type=’virtio’ name=’org.qemu.guest_agent.0’/>
<address type=’virtio-serial’ controller=’0′ bus=’0′ port=’1’/>
</channel>
<input type=’tablet’ bus=’usb’>
<address type=’usb’ bus=’0′ port=’1’/>
</input>
<input type=’mouse’ bus=’ps2’/>
<input type=’keyboard’ bus=’ps2’/>
<graphics type=’vnc’ port=’-1′ autoport=’yes’ listen=’0.0.0.0′ passwd=’$vncpasswd’>
<listen type=’address’ address=’0.0.0.0’/>
</graphics>
<video>
<model type=’cirrus’ vram=’16384′ heads=’1′ primary=’yes’/>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x02′ function=’0x0’/>
</video>
<memballoon model=’virtio’>
<address type=’pci’ domain=’0x0000′ bus=’0x00′ slot=’0x07′ function=’0x0’/>
</memballoon>
</devices>
</domain>
EOF
}

create_mac() {
test -f /tmp/mac.py && rm -f /tmp/mac.py
cat > /tmp/mac.py <<EOF
#!/usr/bin/python
# macgen.py script to generate a MAC address for Red Hat Virtualization guests
#
import random
#
def randomMAC():
mac = [ 0x54, 0x52, 0x00,
random.randint(0x00, 0x7f),
random.randint(0x00, 0xff),
random.randint(0x00, 0xff) ]
return ‘:’.join(map(lambda x: “%02x” % x, mac))
#
print randomMAC()
EOF
vmMac=$(python /tmp/mac.py)
vmMac1=$(python /tmp/mac.py)
}

create_uuid() {
vmUuid=$(uuidgen)
}

dots() {
sec=$1
while true
do
echo -e “.\c”
sleep $sec
done
}

define_kvm() {

virsh define $vmDir/$vmName/$vmName.xml
if [ $? -ne 0 ]; then
echo -e “virsh define $vmName.xml error!”
exit 1
fi
virsh start $vmName
if [ $? -ne 0 ]; then
echo -e “virsh start $vmName error!”
exit 1
fi
virsh list
vncPort=$(virsh vncdisplay $vmName)
vncIp=`ifconfig br0|grep -w inet|awk ‘{print $2}’`
echo -e “VNC IP and Port is: $vncIp$vncPort”
echo -e “$vmName vnc passwd:$vncpasswd \n”
}

modify_disk() {
#vmHostName=$(echo $vmIp | awk -F “.” ‘{print “YN-” $3 “-” $4}’)
vmIpPri=172.16.$(echo $vmIp | awk -F “.” ‘{print $3 “.” $4}’)
vmIpPri=172.16.$(echo $vmIp | awk -F “.” ‘{print $3 “.” $4}’)
vmGy=${vmIp%.*}.1
vmNm=255.255.255.0
vmNm1=255.255.255.0
sectorSize=$(parted $vmDir/$vmName/$vmNameos unit s print | awk ‘/Sector size/{print $4}’ | awk -F “B” ‘{print $1}’)
[ $ostype == “centos7” ] && sst=$(parted $vmDir/$vmName/$vmNameos unit s print | awk ‘/ 1 /{print $2}’)
[ $ostype == “centos6” ] && sst=$(parted $vmDir/$vmName/$vmNameos unit s print | awk ‘/ 2 /{print $2}’)
startSector=${sst:0:${#sst}-1}
offSet=$(($startSector*$sectorSize))
mnttemp=/tmp/$vmName
mkdir -p $mnttemp
mount -o loop,offset=$offSet $vmDir/$vmName/$vmNameos $mnttemp
if [ $? -ne 0 ]; then
echo -e “mount $vmDir/$vmName/$vmNameos failed! “
exit 1
fi
tmpGy=”$mnttemp/etc/sysconfig/network”
tmpIp1=”$mnttemp/etc/sysconfig/network-scripts/ifcfg-eth0″
tmpIp2=”$mnttemp/etc/sysconfig/network-scripts/ifcfg-eth1″
sed -i “/^127.0/a\127.0.0.1 $vmName” $mnttemp/etc/hosts
sed -i “s/GATEWAY=/GATEWAY=$vmGy/g” $tmpGy
sed -i “s/IPADDR=/IPADDR=$vmIp/g” $tmpIp1
sed -i “s/NETMASK=/NETMASK=$vmNm/g” $tmpIp1
sed -i “s/IPADDR=/IPADDR=$vmIpPri/g” $tmpIp2
sed -i “s/NETMASK=/NETMASK=$vmNm1/g” $tmpIp2
read -p “please input root passwd:” newpasswd
if [ -z $newpasswd ] ;then
newpasswd=`echo $RANDOM|md5sum|cut -c 7-12`
fi
sed -i “s/passwdtemp/$newpasswd/g” $mnttemp/root/set.sh
sed -i “s/vmnametemp/$vmName/g” $mnttemp/root/set.sh
sed -i “s/tempdisksize/$tempdisksize/g” $mnttemp/root/set.sh
sed -i “/^touch/a\/root/set.sh” $mnttemp/etc/rc.d/rc.local
sleep 1
umount $mnttemp
sleep 1
rm -rf $mnttemp
}

convert_disk() {
dots 3 &
bgPid2=$!
qemu-img convert -f raw -O qcow2 $vmDir/$vmName/$vmNameos $vmDir/$vmName/${vmNameos}.qcow2
kill $bgPid2 > /dev/null
sleep 2
dots 3 &
bgPid3=$!
qemu-img convert -f raw -O qcow2 $vmDir/$vmName/$vmNamedata $vmDir/$vmName/${vmNamedata}.qcow2
kill $bgPid3 > /dev/null
rm -rf $vmDir/$vmName/$vmNameos $vmDir/$vmName/$vmNamedata
}

main() {
vmNameos=”$vmName”_os
vmNamedata=”$vmName”_data
test -d $vmDir/$vmName || mkdir -p $vmDir/$vmName
if [ -f “$vmDir/$vmName/$vmName.xml” ]; then
mv $vmDir/$vmName/$vmName.xml $vmDir/$vmName/$vmName.xml.$dateTime
echo -e “$vmDir/$vmName/$vmName.xml exist, rename $vmDir/$vmName/$vmName.xml.$dateTime “
fi
echo -e “create virtual machine config file:”
[ -f “/etc/libvirt/qemu/$vmName.xml” ] && echo -e “$vmName is exist, Please check!” && exit 1
create_mac
create_uuid
create_config
echo -e “create config file($vmDir/$vmName/$vmName.xml) success”
if [ ! -f “$diskFile” ]; then
echo -e “$diskFile not found, Please try again!”
exit 1
fi
if [ ! -f “$diskFile1” ]; then
echo -e “$diskFile1 not found, Please try again!”
exit 1
fi
if [ -f “$vmDir/$vmName/$vmNameos” ]; then
mv $vmDir/$vmName/$vmNameos $vmDir/$vmName/$vmNameos.$dateTime
echo -e “$vmDir/$vmName/$vmName exist, rename $vmDir/$vmName/$vmName.$dateTime “
fi
echo -e “create virtual machine disk file: $vmDir/$vmName/$vmNameos”
dots 3 &
bgPid=$!
cp $diskFile $vmDir/$vmName/$vmNameos
kill $bgPid > /dev/null
echo -e “\n”
sleep 2
echo -e “create virtual machine disk file: $vmDir/$vmName/$vmNamedata”
dots 3 &
bgPid1=$!
cp $diskFile1 $vmDir/$vmName/$vmNamedata
kill $bgPid1 > /dev/null
echo -e “\n”
[ $ostype == “centos7” ] && tempdisksize=$[datasize -10]
[ $ostype == “centos6” ] && tempdisksize=$[datasize -10]
if [ $tempdisksize -gt 0 ];then
echo -e “modify data_os size …”
qemu-img resize $vmDir/$vmName/$vmNamedata +${tempdisksize}G
fi
}

main
echo
echo -e “modify virtual machine IP and Hostname…”
modify_disk
echo -e ” convert disk “
convert_disk
echo -e “define virtual machine …”
define_kvm
echo -e “$vmName ip: $vmIp\n”
echo -e “$vmName gy: $vmGy\n”
echo -e “$vmName nip: $vmIpPri\n”
echo -e “$vmName root passwd:$newpasswd \n”
echo -e “create KVM virtual machine:$vmName finish! \n”

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