virsh 在线添加设备cdrom或者iso镜像

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virsh 在线添加设备cdrom或者iso镜像
virsh domblklist Windows2019_x86
" A6 @# ]! a" n  ]/ M2 l/ E Target   Source
& X; T+ t4 }6 r* G5 I----------------------------------------------------------------
vda      /usr/src/Windows2019-x86.qcow2
9 \5 m8 u5 M/ @: r# ]! N  Z sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso



0 y4 C6 f" s4 h& y- ]" @virsh attach-disk  Windows2019_x86 --target sdb   --type cdrom  /usr/src/virtio-win-0.1.225.iso  --mode readonly  
  t" l+ r$ _5 @. r! y; H! ferror: Failed to attach disk
3 U! s; l* ?* _: i/ ~7 M$ Herror: Operation not supported: cdrom/floppy device hotplug isn't supported
2 J% Z5 X' s1 m, y% q


7 n2 {; r0 p" O4 V1 w2 [8 Yroot@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso sdb --cache none --subdriver cdrom --config --persistent
$ ^) D1 |: ]- N  s2 p& g  ]( a3 uerror: Failed to attach disk
9 O7 y6 A( o5 v  X4 O# oerror: unsupported configuration: unknown driver format value 'cdrom'
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root@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso sdb --cache none --subdriver qcow2 --config --persistent
error: Failed to attach disk
0 }! z3 X* Q6 [8 e+ }: Yerror: internal error: No more available PCI slots

root@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso vdc --cache none --subdriver qcow2 --config --persistent
error: Failed to attach disk
error: internal error: unable to execute QEMU command 'blockdev-add': Image is not in qcow2 format
- a0 K  B3 K" P" d
+ S' j7 t: M, p( H) d# @2 d% Xroot@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso vdc --cache none --subdriver raw --config --persistent
Disk attached successfully


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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 --disk path=/usr/src/virtio-win-0.1.225.iso,device=cdrom

Starting install...
5 M- Z$ J" ^" Y- @ERROR    Cannot get interface MTU on 'br0': No such device
% M0 j! }% \: H' s# p6 [Domain installation does not appear to have been successful.
; |( p. o+ v- ^8 V$ pIf it was, you can restart your domain by running:
  virsh --connect qemu:///system start Windows2019_x86
otherwise, please restart your installation.
root@compute01:/usr/src#
root@compute01:/usr/src#
' K9 n: {, U- e% v% o' Froot@compute01:/usr/src# netplan apply
) ~+ P+ ~+ {& ]& F0 b6 [
** (generate:8799): WARNING **: 13:35:59.651: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

. B# t% n; }3 A1 }, d& I** (process:8797): WARNING **: 13:36:01.040: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.

** (process:8797): WARNING **: 13:36:01.052: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
; P1 q9 K  o5 {
** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
1 b  W0 J5 b% I+ RSee the 'Default routes' section of the documentation for more details.

** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
+ |2 R& n) V. P- Iroot@compute01:/usr/src#
root@compute01:/usr/src#
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 --disk path=/usr/src/virtio-win-0.1.225.iso,device=cdrom

Starting install...
Creating domain...                                          |    0 B  00:00:00     

& @% y: k/ N' w  x! o1 HDomain is still running. Installation may be in progress.
: f% F' }( Y% w8 RYou can reconnect to the console to complete the installation process.
root@compute01:/usr/src#

在线添加光盘
virsh attach-disk Windows2019_x86 /usr/src/virtio-win-0.1.225.iso/ vdd

其他方法：
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6 I6 D: _6 ]* ~6 x' Y再次使用 virsh dumpxml sles12-sp3 可以看到iso文件加载:
0 `  B1 t- Y/ p  q# J5 W
<disk type='file' device='cdrom'>
# n+ s6 g, w* t; B( r  <driver name='qemu' type='raw'/>
* [, i1 l: \$ [7 t  <source file='/var/lib/libvirt/images/SLE-12-SP3-Server-DVD-x86_64-GM-DVD1.iso' index='3'/>
  <backingStore/>
  <target dev='sda' bus='sata'/>
; m* B) M5 a) o* m# }( X  <readonly/>
  <alias name='sata0-0-0'/>
  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
8 x1 R7 g! `# T9 [' P: c如果要卸载这个iso文件，则创建一个相同结构的xml文件 detach_iso.xml ，但是保持 <source/> 行删除:
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<disk type='file' device='cdrom'>
  <driver name='qemu' type='raw'/>
  <backingStore/>
  <target dev='sda' bus='sata'/>
7 `; L) X$ s3 w2 P1 `  <readonly/>
  <alias name='sata0-0-0'/>
  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
1 q# {  U+ F( W  c9 m然后执行设备更新:
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0 z. z: y& S% V3 H+ @virsh update-device sles12-sp3 detach_iso.xml
此时提示:
! K0 O2 X9 T, u+ @) l$ H" L
* x8 v8 w' ?+ ^* z9 |0 BDevice updated successfully
1 m" @2 C1 g( L再检查虚拟机配置，就看到iso文件已经卸载了。
; T' I- O5 v2 ^$ c+ S7 Q* {

admin

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 --disk path=/usr/src/virtio-win-0.1.225.iso,device=cdrom  创建kvm时，添加对应的多个设备即可。
3 X* R# H$ J2 w* V
virsh domblklist Windows2019_x86
Target   Source
----------------------------------------------------------------
vda      /usr/src/Windows2019-x86.qcow2
sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso
sdb      /usr/src/virtio-win-0.1.225.iso

admin

2.在线调整虚拟机内存(增大或减小)
#调整为4G
- q# h0 b5 w$ Fvirsh setmem cos_v1 4G
+ }& X. V+ ]! T9 d+ O# z
( y) m! @* H$ S1 J#调整为2G
/ z( S, e. a; _virsh setmem cos_v1 2G
#能够在线调整的最大内存不能超过为虚拟机分配的最大内存（上面xml文件中设置的最大为4G），否则需要关闭虚拟机上调最大内存

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: l! K3 q; X; V6 {4 A3.在线调整虚拟机CPU(只能增大，不能减小)
virsh setvcpus cos_v1 4
9 b$ K1 ^. N: p' y+ H! ?virsh setvcpus cos_v1 8
% S8 O: r( B2 p8 Q#同样，能够动态调整的最大VCPU个数也不能超过为虚拟机设置的最大VCPU数量
, I" V9 Y3 O. u. ]' F9 E) _) w

4.在线添加硬盘
#添加qcow2格式硬盘

#创建qcow2格式的新磁盘,大小为40G
qemu-img create -f qcow2 /data/vhosts/test/cos_v1-add1.disk 40G
* |5 @, `: J2 _. L5 bvirsh attach-disk cos_v1 /data/vhosts/test/cos_v1-add1.disk vdb --cache none --subdriver qcow2 --config --persistent
#虚拟机根磁盘为vda，因此这里使用vdb表示新添加磁盘
#--config 参数同时更新虚拟机xml文件，确保重启后依然生效
4 \% h4 E7 C' X& U/ T#添加raw格式硬盘
7 n; I* B5 M5 w#创建raw格式的新磁盘,大小为40G
2 O7 C% V: @- M( l; Z& {8 Bqemu-img create -f raw /data/vhosts/test/cos_v1-add2.disk 40G
- _+ G. W2 }1 f/ w! ~virsh attach-disk lnmptest-107 /data/vhosts/test/cos_v1-add2.disk vdc --cache none --subdriver raw --config --persistent
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; }* P* J, Z' R! t, p: y5.在线移除硬盘
2 Q; u, u8 ]; X: b; k#可以查看虚拟机所有磁盘
  y# E# I; |7 ~0 Fvirsh domblklist cos_v1
virsh detach-disk cos_v1 vdb

" t8 s* O' J) H- I7 Y) y6.在线添加网卡
: d, f5 C. t$ t2 x, Zvirsh attach-interface --domain cos_v1 --type network --source default --model virtio --config
#可以查看新添加的网卡
virsh domiflist cos_v1
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7.在线添加光盘
virsh attach-disk centosbase /data_lij/iso/CentOS-6.4-x86_64-bin-DVD1.iso vdd