创建网络

蒜香大龙虾 2024-08-08 14:59:05

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通过virsh创建nat网络

查看默认网络配置

1 2	sudo su virsh net-dumpxml default

反馈如下

[cshrimp-a300 ~]# virsh net-dumpxml default 
<network>
  <name>default</name>
  <uuid>07799595-c50c-4826-83b5-1a714b070092</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:90:5d:b9'/>
  <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>

写入文件并稍加修改

<network>
  <name>nat1</name>
  <forward mode='nat'/>
  <bridge name='virbr1' stp='on' delay='0'/>
  <ip address='172.20.20.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='172.20.20.100' end='172.20.20.200'/>
    </dhcp>
  </ip>
</network>

创建这个网络

1	virsh net-define nat1.xml

反馈如下

1 2	[cshrimp-a300 ~]# virsh net-define nat1.xml Network nat1 defined from nat1.xml

可以通过net-list查看

[cshrimp-a300 ~]# virsh net-list --all
 Name      State      Autostart   Persistent
----------------------------------------------
 default   inactive   no          yes
 nat1      inactive   no          yes

启动和自启网络

启动方法如下

1	virsh net-start nat1

设置自启动

1	virsh net-autostart nat1

查看反馈

[cshrimp-a300 ~]# virsh net-list
 Name   State    Autostart   Persistent
-----------------------------------------
 nat1   active   yes         yes

[cshrimp-a300 ~]# ip a s virbr1
20: virbr1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:e3:31:51 brd ff:ff:ff:ff:ff:ff
    inet 172.20.20.1/24 brd 172.20.20.255 scope global virbr1
       valid_lft forever preferred_lft forever

将接口附加到虚拟机

此处使用虚拟机cloud-init-linux1作为示例

1	virsh attach-interface cloud-init-linux1 --type bridge --source virbr1 --model virtio --config --live

查询地址

[cshrimp-a300 ~]# virsh net-dhcp-leases nat1 
 Expiry Time           MAC address         Protocol   IP address         Hostname   Client ID or DUID
----------------------------------------------------------------------------------------------------------
 2024-08-08 19:09:43   52:54:00:26:06:35   ipv4       172.20.20.105/24   -          01:52:54:00:26:06:35

测试网络连通性

[root@localhost ~]# ip a s eth1
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:26:06:35 brd ff:ff:ff:ff:ff:ff
    altname enp7s0
    inet 172.20.20.105/24 brd 172.20.20.255 scope global dynamic noprefixroute eth1
       valid_lft 3058sec preferred_lft 3058sec
    inet6 fe80::f409:13e5:80ef:5d6b/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@localhost ~]# ip route
default via 172.20.20.1 dev eth1 proto dhcp src 172.20.20.105 metric 101 
172.20.20.0/24 dev eth1 proto kernel scope link src 172.20.20.105 metric 101 
[root@localhost ~]# ping 172.20.20.1 -c 2
PING 172.20.20.1 (172.20.20.1) 56(84) bytes of data.
64 bytes from 172.20.20.1: icmp_seq=1 ttl=64 time=0.234 ms
64 bytes from 172.20.20.1: icmp_seq=2 ttl=64 time=0.289 ms

--- 172.20.20.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1038ms
rtt min/avg/max/mdev = 0.234/0.261/0.289/0.027 ms
[root@localhost ~]# ping 223.5.5.5 -c 2
PING 223.5.5.5 (223.5.5.5) 56(84) bytes of data.
64 bytes from 223.5.5.5: icmp_seq=1 ttl=115 time=41.1 ms
64 bytes from 223.5.5.5: icmp_seq=2 ttl=115 time=40.7 ms

--- 223.5.5.5 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 40.726/40.924/41.122/0.198 ms
[root@localhost ~]# ping huawei.com -c 2
PING huawei.com (121.37.49.12) 56(84) bytes of data.
64 bytes from ecs-121-37-49-12.compute.hwclouds-dns.com (121.37.49.12): icmp_seq=1 ttl=50 time=7.24 ms
64 bytes from ecs-121-37-49-12.compute.hwclouds-dns.com (121.37.49.12): icmp_seq=2 ttl=50 time=6.92 ms

--- huawei.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 6.924/7.081/7.239/0.157 ms

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