云计算之虚拟化技术--管理虚拟机网络

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褪色的腿毛 2022-12-21 11:24:56 ©著作权

文章标签 运维虚拟化 KVM 虚拟网络 NAT 文章分类 虚拟化云计算

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管理虚拟机网络

前言
一、KVM 的虚拟机网络
二、NAT 虚拟网络
三、网桥虚拟网络
四、隔离虚拟网络

前言

本环境是基于 Centos 7.7 系统构建KVM环境
具体构建，请参考 KVM环境的部署

一、KVM 的虚拟机网络

云计算之虚拟化技术--管理虚拟机网络_NAT

查看虚拟机网络管理的配置文件

[root@kvm01 ~]# vim /etc/libvirt/qemu/networks/default.xml
<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
  virsh net-edit default
or other application using the libvirt API.
-->

<network>
  <name>default</name>
  <uuid>912b855a-b630-4f9d-9d6b-1989fab39fa7</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:55:29:1b'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
    </dhcp>
  </ip>
</network>

KVM 的虚拟机网络类型

NAT 虚拟网络
网桥虚拟网络
隔离虚拟网络

利用virsh 管理虚拟机网络

#查看命令帮助
[root@kvm01 ~]# virsh help network
 Networking (help keyword 'network'):
    net-autostart                  autostart a network
    net-create                     create a network from an XML file
    net-define                     define an inactive persistent virtual network or modify an existing persistent one from an XML file
    net-destroy                    destroy (stop) a network
    net-dhcp-leases                print lease info for a given network
    net-dumpxml                    network information in XML
    net-edit                       edit XML configuration for a network
    net-event                      Network Events
    net-info                       network information
    net-list                       list networks
    net-name                       convert a network UUID to network name
    net-start                      start a (previously defined) inactive network
    net-undefine                   undefine a persistent network
    net-update                     update parts of an existing network's configuration
    net-uuid                       convert a network name to network UUID

#查看所有的虚拟网络
[root@kvm01 ~]# virsh net-list --all
 Name                 State      Autostart     Persistent
----------------------------------------------------------
 default              active     yes           yes

[root@kvm01 ~]# virsh net-info default 
Name:           default
UUID:           912b855a-b630-4f9d-9d6b-1989fab39fa7
Active:         yes
Persistent:     yes
Autostart:      yes
Bridge:         virbr0

#查看虚拟网络配置文件
[root@kvm01 ~]# virsh net-dumpxml default 
<network>
  <name>default</name>
  <uuid>912b855a-b630-4f9d-9d6b-1989fab39fa7</uuid>
  <forward mode='nat'>
    <nat>
      <port start='1024' end='65535'/>
    </nat>
  </forward>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:55:29:1b'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
    </dhcp>
  </ip>
</network>