Centos7使用OVS桥的方式创建KVM虚拟机

news2024/9/20 9:44:35

一、OVS使用

1、OVS编译安装

下载ovs2.17版本源码
http://www.openvswitch.org//download/
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./boot.sh
./configure
make && make install

2、启动OVS服务

（1）创建文件/etc/systemd/system/openvswitch.service

[root@localhost qemu]# systemctl cat openvswitch
# /etc/systemd/system/openvswitch.service
[Unit]
Description=Open vSwitch server daemon

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/share/openvswitch/scripts/ovs-ctl start
ExecStop=/usr/local/share/openvswitch/scripts/ovs-ctl stop

[Install]
WantedBy=network-online.target

（2）启动ovs

systemctl daemon-reload
systemctl restart openvswitch

3、创建OVS网桥

sudo ovs-vsctl add-br OVS0
sudo ovs-vsctl add-br OVS1

二、KVM配置

1、使用virsh配置域XML文件

<interface type='network'>
      <mac address='52:54:00:8e:00:21'/>
      <source network='OVS1'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<interface type='network'>
      <mac address='52:54:00:8e:00:22'/>
      <source network='OVS0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</interface>

2、进入/etc/libvirt/qemu/networks目录

（1）创建OVS0.xml文件

<network>
  <name>OVS0</name>
  <uuid>38d78811-6c60-4fc3-932a-fedd9400cdf4</uuid>
  <forward mode='bridge'/>
  <bridge name='OVS0'/>
  <virtualport type='openvswitch'/>
</network>

（2）创建OVS1.xml文件

<network>
  <name>OVS1</name>
  <uuid>38d78832-6c60-4fc3-932a-fedd9400cdf4</uuid>
  <forward mode='bridge'/>
  <bridge name='OVS1'/>
  <virtualport type='openvswitch'/>
</network>

（3）使用以下命令启动网桥

# OVS0管理网桥
virsh net-define OVS0
virsh net-start OVS0
virsh net-autostart OVS0
# OVS1内部通信网桥
virsh net-define OVS1
virsh net-start OVS1
virsh net-autostart OVS1

3、配置网桥ip地址

（1）修改物理网卡网络配置文件

[root@localhost network-scripts]# cat ifcfg-eno1
TYPE=OVSPort
PROXY_METHOD=none
BROWSER_ONLY=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eno1
UUID=511ff6a1-e78d-475a-bfe7-74a46557b9b5
DEVICE=eno1
ONBOOT=yes
DEVICETYPE=ovs
OVS_BRIDGE=OVS0

（2）添加OVS网桥网络配置文件

[root@localhost network-scripts]# cat ifcfg-OVS0
DEVICE=OVS0
STP=yes
BOOTPROTO=none
ONBOOT=yes
TYPE=OVSBridge
DEVICETYPE=ovs
USERCTL=yes
PEERDNS=yes
IPV6INIT=no
NAME=OVS0
IPADDR=172.18.3.25
NETMASK=255.255.0.0
GATEWAY=172.18.0.1
DNS1=8.8.8.8

[root@localhost network-scripts]# cat ifcfg-OVS1
DEVICE=OVS1
STP=yes
BOOTPROTO=none
ONBOOT=yes
TYPE=OVSBridge
DEVICETYPE=ovs
USERCTL=yes
PEERDNS=yes
IPV6INIT=no
NAME=OVS1
IPADDR=192.168.100.1
NETMASK=255.255.255.0

（3）将物理网卡加入网桥OVS0

ovs-vsctl add-port OVS0 eno1

（4）查看kvm网桥信息

[root@localhost network-scripts]# virsh net-list
 Name                 State      Autostart     Persistent
----------------------------------------------------------
 br0                  active     yes           yes
 default              active     yes           yes
 OVS0                 active     yes           yes
 OVS1                 active     yes           yes

4、创建KVM虚拟机

qemu-img create -f qcow2 /opt/vm/test.qcow2 10G
virt-install \
  --ram 1024 \
  --accelerate \
  --disk path=/opt/vm/test.qcow2 \
  --name test \
  --network network:OVS0\
  --vcpus 1 \
  --cpu core2duo \
  --cdrom /opt/iso/CentOS-7.0-1406-x86_64-DVD.iso

（1）虚拟机网桥xml文件

<interface type='network'>
      <mac address='52:54:00:8e:00:21'/>
      <source network='OVS1'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>

（2）查看KVM虚拟机状态

[root@localhost network-scripts]# virsh list
 Id    Name                           State
----------------------------------------------------
 1     Namenode01                     running
 2     Hdfs_client                    running
 3     Datanode02                     running
 4     Datanode03                     running
 5     Namenode03                     running
 7     Namenode02                     running
 8     Distribution                   running
 9     Datanode01                     running
 10    Namenode04                     running
 15    manager                        running

（3）查看ovs网桥信息

[root@localhost network-scripts]# ovs-vsctl show
2ffbf926-68c9-4dba-8c49-ddca5ed8ec76
    Bridge OVS1
        Port OVS1
            Interface OVS1
                type: internal
        Port vnet7
            Interface vnet7
        Port vnet4
            Interface vnet4
        Port vnet8
            Interface vnet8
        Port vnet3
            Interface vnet3
        Port vnet1
            Interface vnet1
        Port vnet0
            Interface vnet0
        Port vnet6
            Interface vnet6
        Port vnet5
            Interface vnet5
        Port vnet2
            Interface vnet2
    Bridge OVS0
        Port OVS0
            Interface OVS0
                type: internal
        Port vnet9
            Interface vnet9
        Port eno1
            Interface eno1
    ovs_version: "2.17.5"

（4）重启网络服务

systemctl restart network

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（5）查看宿主机ip地址

[root@localhost qemu]# ip a|grep OVS
5: OVS1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    inet 192.168.100.1/24 brd 192.168.100.255 scope global OVS1
6: OVS0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    inet 172.18.3.25/16 brd 172.18.255.255 scope global OVS0