KVM虚拟化技术之网卡流量聚合

2014年新的一年春天来了，又是一年春来到，烟花三月好风光，好久没发表文章了，今天在这里记录一下KVM网卡绑定安装脚本，供大家参考。

一、实施环境：

硬件设备：H3C S5500三层交换机+DELLR720服务器

虚拟化软件：KVM虚拟化

二、脚本内容：

脚本基于服务器四块网卡绑定，网卡流量聚合叠加，总和为4G，模拟测试任意down掉一块网卡、两块网卡对物理机上的虚拟机集群没有任何影响。直接上脚本如下：

#!/bin/sh
#Auto Make KVM Virtualization
#Author wugk 2013-12-06 bond0＋br0
#Auto config bond scripts
eth_bond()
{
NETWORK=(
  HWADDR=`ifconfig eth0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $1}'`
  IPADDR=`ifconfig eth0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $2}'`
  NETMASK=`ifconfig eth0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $3}'`
  GATEWAY=`route -n|grep "UG"|awk '{print $2}'`
)
DIR=/etc/sysconfig/network-scripts/
BAK=/data/backup/`date ＋%Y%m%d`
if
[ ! -d $BAK ];then
mkdir -p $BAK
cp $DIR/ifcfg-eth* $BAK
else
cp $DIR/ifcfg-eth* $BAK
fi
cat >ifcfg-bond0<<EOF
DEVICE=bond0
BOOTPROTO=static
${NETWORK[1]}
${NETWORK[2]}
${NETWORK[3]}
ONBOOT=yes
TYPE=Ethernet
NM_CONTROLLED=no
EOF
yes|cp ifcfg-bond0 ifcfg-eth0 ifcfg-eth1 ifcfg-eth2 ifcfg-eth3 $DIR
yes|cp modprobe.conf /etc/modprobe.d/
echo "The Server bond0 config success !!"
}
#Auto install kvm and config br0 scripts
kvm_install()
{
cat <<EOF
＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋Welcome To Use Auto Install KVM Scripts ＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋
＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋This KVM Install Virtual ＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋
＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋2013-12-06 Author wugk ＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋＋
EOF
KVM_SOFT=(
  kvm python-virtinst libvirt bridge-utils virt-manager qemu-kvm-tools virt-viewer virt-v2v libguestfs-tools
)
NETWORK=(
  HWADDR=`ifconfig bond0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $1}'`
  IPADDR=`ifconfig bond0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $2}'`
  NETMASK=`ifconfig bond0 |egrep "HWaddr|Bcast" |tr "\n" " "|awk '{print $5,$7,$NF}'|sed -e 's/addr://g' -e 's/Mask://g'|awk '{print $3}'`
  GATEWAY=`route -n|grep "UG"|awk '{print $2}'`
)
#Check whether the system supports virtualization
  egrep 'vmx|svm' /proc/cpuinfo >>/dev/null
if
  [ "$?" -eq "0" ];then
  echo 'Congratulations, your system success supports virtualization !'
else
  echo -e 'OH,your system does not support virtualization !\nPlease modify the BIOS virtualization options (Virtualization Technology)'
  exit 0
fi
  if
    [ -e /usr/bin/virsh ];then
  echo "Virtualization is already installed ,Please exit ...." ;exit 0
  fi
  yum -y install ${KVM_SOFT[@]}
  /sbin/modprobe kvm
  ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm
  lsmod | grep kvm >>/dev/null
  if
    [ "$?" -eq "0" ];then
    echo 'KVM installation is successful !'
else
    echo 'KVM installation is falis,Please check ......'
  exit 1
fi
cd /etc/sysconfig/network-scripts/
  mkdir -p /data/backup/`date ＋%Y%m%d-%H:%M`
  yes|cp ifcfg-eth* /data/backup/`date ＋%Y%m%d-%H:%M`/
if
  [ -e /etc/sysconfig/network-scripts/ifcfg-br0 ];then
  echo "The ifcfg-br0 already exist ,Please wait exit ......"
  exit 2
else
  cat >ifcfg-bond0 <<EOF
  DEVICE=bond0
  BOOTPROTO=none
  #${NETWORK[0]}
  NM_CONTROLLED=no
  ONBOOT=yes
  TYPE=Ethernet
  BRIDGE="br0"
  ${NETWORK[1]}
  ${NETWORK[2]}
  ${NETWORK[3]}
  USERCTL=no
EOF
  cat >ifcfg-br0 <<EOF
  DEVICE="br0"
  BOOTPROTO=none
  #${NETWORK[0]}
  IPV6INIT=no
  NM_CONTROLLED=no
  ONBOOT=yes
  TYPE="Bridge"
  ${NETWORK[1]}
  ${NETWORK[2]}
  ${NETWORK[3]}
  USERCTL=no
EOF
fi
echo 'Your can restart Ethernet Service: /etc/init.d/network restart !'
echo '---------------------------------------------------------'
sleep 1
echo 'Your can restart KVM Service : /etc/init.d/libvirtd restart !'
echo
echo -e "You can create a KVM virtual machine: \nvirt-install --name=centos01 --ram 512 --vcpus=1 --disk path=/data/kvm/centos01.img,size=7,bus=virtio --accelerate --cdrom /data/iso/centos58.iso --vnc --vncport=5910 --vnclisten=0.0.0.0 --network bridge=br0,model=virtio --noautoconsole"
}
case $1 in
eth_bond )
eth_bond
;;
kvm_install )
kvm_install
;;
* )
echo "Usage: { $0 eth_bond|kvm_install|help}"
esac

三、网卡内容：

修改之后ifcfg-eth0配置内容如下，其他三块网卡依次修改为对应的网卡名称，内容跟eth0一致：

DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
TYPE=Ethernet
NM_CONTROLLED=no

四、H3C S5500交换机配置：

服务器端聚合配置完毕后，还需要在交换机把相应的4个端口做网络聚合，命令如下：

system-view
interface Bridge-Aggregation 100
link-aggregation mode dynamic
quit
interface GigabitEthernet1/0/1
port link-aggregation group 100
quit
interface GigabitEthernet1/0/2
port link-aggregation group 100
quit
interface GigabitEthernet1/0/3
port link-aggregation group 100
quit
interface GigabitEthernet1/0/4
port link-aggregation group 100
quit

参考文章：

http://navyaijm.blog.51cto.com/4647068/1316910

http://wgkgood.blog.51cto.com/1192594/1337628