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
  U+ y  h- V% R6 {virsh domblklist Windows2019_x86
Target   Source
----------------------------------------------------------------
6 ~- H3 }0 g" J1 ~& R vda      /usr/src/Windows2019-x86.qcow2
" A( a! k: R# q sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso
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0 Y. Y1 y4 s) q9 J: kvirsh attach-disk  Windows2019_x86 --target sdb   --type cdrom  /usr/src/virtio-win-0.1.225.iso  --mode readonly  
error: Failed to attach disk
0 _* x+ f  D" `0 herror: Operation not supported: cdrom/floppy device hotplug isn't supported
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% l! E4 M; I( x. J6 ?root@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso sdb --cache none --subdriver cdrom --config --persistent
& _$ z1 J- s; d7 L, {5 W; `) c0 Oerror: Failed to attach disk
error: 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
  t3 R6 k  R) X0 _0 d# X5 ?error: internal error: No more available PCI slots
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4 b* A; N8 M2 F& broot@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso vdc --cache none --subdriver qcow2 --config --persistent
: H; ~% {/ K- N* K/ l3 aerror: Failed to attach disk
error: internal error: unable to execute QEMU command 'blockdev-add': Image is not in qcow2 format

root@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

0 J! p! c- P0 u2 }Starting install...
ERROR    Cannot get interface MTU on 'br0': No such device
3 n8 l" e3 h* b& h8 G* {Domain installation does not appear to have been successful.
' u! f; g+ N7 h$ bIf it was, you can restart your domain by running:
& h$ Y- W& S7 d1 g! a  virsh --connect qemu:///system start Windows2019_x86
7 p# `7 ]4 ]# y# s$ K0 }: |# ?otherwise, please restart your installation.
root@compute01:/usr/src#
root@compute01:/usr/src#
root@compute01:/usr/src# netplan apply
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** (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.
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** (process:8797): WARNING **: 13:36:01.040: `gateway4` has been deprecated, use default routes instead.
6 _  ]. v: o6 o, O  N# wSee 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.
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** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
$ F3 r& w  {% [2 }1 z! VSee the 'Default routes' section of the documentation for more details.

  N1 S1 I4 @! B) n** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
+ M% B+ k) E8 m: |: ?See the 'Default routes' section of the documentation for more details.
9 ^4 l' r! k# Y! |& A1 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

+ E/ T$ D9 ~) ?Starting install...
Creating domain...                                          |    0 B  00:00:00     

/ w8 A2 a/ Q/ h9 iDomain is still running. Installation may be in progress.
You can reconnect to the console to complete the installation process.
, E8 R$ y* A- m: K, Rroot@compute01:/usr/src#

在线添加光盘
  l& D. _5 I5 `. q% N+ N+ }2 Dvirsh attach-disk Windows2019_x86 /usr/src/virtio-win-0.1.225.iso/ vdd
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其他方法：


再次使用 virsh dumpxml sles12-sp3 可以看到iso文件加载:
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<disk type='file' device='cdrom'>
  <driver name='qemu' type='raw'/>
: O; K* g# x0 G! t! ~- O1 k5 ^: S  <source file='/var/lib/libvirt/images/SLE-12-SP3-Server-DVD-x86_64-GM-DVD1.iso' index='3'/>
% D4 D$ e, B5 ]+ [8 _8 K6 T" i: c4 z  <backingStore/>
  <target dev='sda' bus='sata'/>
7 q1 i9 h& S9 p3 y: @( [3 c. ?  <readonly/>
  <alias name='sata0-0-0'/>
, d. v' z6 n& d" V% x* g  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
$ l- @5 B" N  r# X9 L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'/>
, t0 E  O0 E+ n& |- @; `& y* ~  <backingStore/>
2 W& E9 D3 j4 F* B  L' |  <target dev='sda' bus='sata'/>
$ i1 H( J! {, R) B  <readonly/>
  <alias name='sata0-0-0'/>
$ s6 \9 m' b  O$ ]0 N3 Y4 B5 n$ W- I  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
然后执行设备更新:
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virsh update-device sles12-sp3 detach_iso.xml
此时提示:
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) c! d5 o+ Q2 y/ o9 [, {; jDevice updated successfully
  a+ e& Y- F, F" B再检查虚拟机配置，就看到iso文件已经卸载了。

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。
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3 `" F9 H) {/ C( h1 u3 b# nvirsh domblklist Windows2019_x86
7 X0 V5 h  p* h4 u) j Target   Source
----------------------------------------------------------------
9 |1 W7 f# V6 L' }) @* [ vda      /usr/src/Windows2019-x86.qcow2
& x* _! n1 A6 H! r/ H 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)
8 b: T, C, c0 D) e- U3 }7 ^#调整为4G
8 `: x6 V1 ]1 Fvirsh setmem cos_v1 4G

4 P3 O  G$ a+ v3 }+ L" G  b  P. {#调整为2G
) e# Z9 j, i8 y" l1 J. Ivirsh setmem cos_v1 2G
. I1 j. d$ k2 J2 T: C1 H! v- ?#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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; o7 G3 _1 c& |1 [' D4 D- {$ a3.在线调整虚拟机CPU(只能增大，不能减小)
- X0 X% T: D/ T& f' lvirsh setvcpus cos_v1 4
virsh setvcpus cos_v1 8
0 e8 V" Y- D. e: h4 ^# }) _#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
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4.在线添加硬盘
#添加qcow2格式硬盘
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+ C2 Z2 C% u! I5 k' }#创建qcow2格式的新磁盘,大小为40G
/ D6 Q$ _; ?8 H2 E/ y; B0 D# {" Pqemu-img create -f qcow2 /data/vhosts/test/cos_v1-add1.disk 40G
9 M9 [- p" r0 C4 O* M3 Mvirsh 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
; j( b9 V" i0 f6 z6 x3 T- p8 E#--config 参数同时更新虚拟机xml文件，确保重启后依然生效
#添加raw格式硬盘
. w2 ?7 A" q. h6 f#创建raw格式的新磁盘,大小为40G
qemu-img create -f raw /data/vhosts/test/cos_v1-add2.disk 40G
virsh attach-disk lnmptest-107 /data/vhosts/test/cos_v1-add2.disk vdc --cache none --subdriver raw --config --persistent

5.在线移除硬盘
8 s5 w' e: Z$ Q4 F#可以查看虚拟机所有磁盘
' ~2 v/ p: {4 _) Q2 A. A9 ^virsh domblklist cos_v1
- n; J" ^' G; p5 Y7 h- L5 ~virsh detach-disk cos_v1 vdb

2 C& V9 x* `. X: _# ~% N6.在线添加网卡
, r" A  ?4 G. F" }* mvirsh attach-interface --domain cos_v1 --type network --source default --model virtio --config
#可以查看新添加的网卡
. n. \9 ]! Z! M0 R$ E5 V  j+ E* Hvirsh domiflist cos_v1
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' g# n0 X7 @$ l# i7.在线添加光盘
virsh attach-disk centosbase /data_lij/iso/CentOS-6.4-x86_64-bin-DVD1.iso vdd