ubuntu 经常出现创建kvm虚机时报错ERROR Cannot get interface MTU on 'br0': No such device

admin

root@compute01:/usr/src# virt-install --name=Windows2019_x86  --ram 8192 --vcpus=4 --disk path=/usr/src/Windows2019-x86.qcow2,format=qcow2,size=15,bus=virtio --accelerate --cdrom /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso --vnc --vncport=5906 --vnclisten=0.0.0.0 --network bridge=br0,model=virtio --noautoconsole

Starting install...
ERROR    Cannot get interface MTU on 'br0': No such device
" r5 p6 X; F( f, S  {9 HDomain installation does not appear to have been successful.
  S1 m! ^+ z) `' o2 Z' `1 z' b: s4 `If it was, you can restart your domain by running:
  virsh --connect qemu:///system start Windows2019_x86
" O/ v3 y: y) _* w' ~# rotherwise, please restart your installation.

创建失败：有问题，检查网卡：

root@compute01:/usr/src# ip addr
1 F6 B' h; P1 W1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
' G& a  b2 P/ u" b- ]    inet 127.0.0.1/8 scope host lo
6 A; M1 B% G7 @       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp8s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:68:10:89 brd ff:ff:ff:ff:ff:ff
! b8 P9 Z) P/ \% ^( t3: enp9s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether d8:50:e6:4a:41:b2 brd ff:ff:ff:ff:ff:ff
    inet 198.192.168.66/24 brd 198.192.168.255 scope global enp9s0
       valid_lft forever preferred_lft forever
' e% \. A8 V; [8 z* i    inet6 fe80::da50:e6ff:fe4a:41b2/64 scope link
; z! B( ]: A; g( a$ a, ]% U. b       valid_lft forever preferred_lft forever
1 \* T( W' |* c6 x( w, r0 V4: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
5 T; f5 f. K# y! g0 U    link/ether 04:25:c5:2a:57:13 brd ff:ff:ff:ff:ff:ff
& l, {( J# `$ d    inet 192.168.8.66/24 brd 192.168.8.255 scope global enp2s0f0
" i) K/ r" a! z       valid_lft forever preferred_lft forever
3 J8 `) c/ r* k+ h    inet6 fe80::625:c5ff:fe2a:5713/64 scope link
  D8 h5 C$ p3 \$ M5 r: l       valid_lft forever preferred_lft forever
5: enp2s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 04:25:c5:2a:57:14 brd ff:ff:ff:ff:ff:ff
11: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether fe:54:00:90:65:d2 brd ff:ff:ff:ff:ff:ff
3 }! H3 S. j7 x. {6 C
重新配置网络：

4 z0 i  B4 U4 l3 \5 |root@compute01:/usr/src# netplan apply

* [* Q( M/ |6 ?& ~** (generate:6407): WARNING **: 13:00:50.842: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

6 Z$ W2 u& z, }$ k6 s$ w, J** (process:6405): WARNING **: 13:00:51.287: `gateway4` has been deprecated, use default routes instead.
5 s& _2 S& Q, j3 C$ kSee the 'Default routes' section of the documentation for more details.

% B7 N: r5 U0 U0 _( T6 y7 l4 c& M** (process:6405): WARNING **: 13:00:51.298: `gateway4` has been deprecated, use default routes instead.
8 ^% R  D( s( k1 U" E! Y& R2 nSee the 'Default routes' section of the documentation for more details.
" I& J4 Q5 A; j7 D9 M5 `
3 v& G* b, x! s** (process:6405): WARNING **: 13:00:51.684: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
- H" }3 G% V" G( U$ Y$ p
( p  l2 E. h9 g. F) G** (process:6405): WARNING **: 13:00:51.685: `gateway4` has been deprecated, use default routes instead.
7 k& h1 O& ?4 v) N" FSee the 'Default routes' section of the documentation for more details.


再重试，问题解决。
root@compute01:/usr/src# virt-install --name=Windows2019_x86  --ram 8192 --vcpus=4 --disk path=/usr/src/Windows2019-x86.qcow2,format=qcow2,size=15,bus=virtio --accelerate --cdrom /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso --vnc --vncport=5906 --vnclisten=0.0.0.0 --network bridge=br0,model=virtio --noautoconsole

Starting install...
: n# M! V. U) v' j  m8 @Creating domain...                                                                                                                                         |    0 B  00:00:00     
6 N; `% {/ F* ?& j' u
: b& [1 Y: I# C+ R8 a; yDomain is still running. Installation may be in progress.
You can reconnect to the console to complete the installation process.


+ X1 z5 C$ d8 t7 a

admin

ubuntu server 版本经常出现这样的问题。

# lsb_release -a
No LSB modules are available.
Distributor ID:        Ubuntu
Description:        Ubuntu 22.04.2 LTS
Release:        22.04
& t$ l7 Y! R' ECodename:        jammy
3 B1 q% v" e/ k: g0 p4 F1 c1 V
不太成熟的版本。