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
Target   Source
# `% d# r0 A9 V$ s& C----------------------------------------------------------------
) @! S$ p, s. q# ]1 R" M  V/ ~+ S& W vda      /usr/src/Windows2019-x86.qcow2
: Y' B/ R/ V1 I; w+ B8 ^( Y sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso
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virsh attach-disk  Windows2019_x86 --target sdb   --type cdrom  /usr/src/virtio-win-0.1.225.iso  --mode readonly  
: k2 `6 O6 i2 u! o- F- a: a' ?error: Failed to attach disk
/ ~1 _1 @% o6 s* Cerror: Operation not supported: cdrom/floppy device hotplug isn't supported

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9 r/ Y& E: B4 w# b8 _# k3 f) groot@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso sdb --cache none --subdriver cdrom --config --persistent
error: Failed to attach disk
! @5 [& Q: @& B& \0 herror: unsupported configuration: unknown driver format value 'cdrom'

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
error: 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
0 I; Z* i5 V6 ?1 B; |9 Zerror: Failed to attach disk
error: internal error: unable to execute QEMU command 'blockdev-add': Image is not in qcow2 format

. t- ^, D$ R  z/ l( ~- h# \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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& \$ F+ }. b. u6 _! s- p/ z; oroot@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

) h* l, P/ [% K+ H8 T9 xStarting install...
  ?; H4 k& Q; @3 k9 L* {; |ERROR    Cannot get interface MTU on 'br0': No such device
0 X/ O$ x' x1 a7 e% oDomain installation does not appear to have been successful.
If it was, you can restart your domain by running:
% `' a0 b& B; a5 c! K9 p) d; @& r  virsh --connect qemu:///system start Windows2019_x86
' H" p" S0 }4 g* S$ `- h) j+ motherwise, please restart your installation.
" j$ _5 v) ~" f% y& J- x$ `root@compute01:/usr/src#
root@compute01:/usr/src#
/ B+ u  G& j1 @root@compute01:/usr/src# netplan apply

# z0 O  C, s: O( m: {6 g" x  B1 t5 Q- `** (generate:8799): WARNING **: 13:35:59.651: `gateway4` has been deprecated, use default routes instead.
' |' p5 G2 O& e  n: A4 o+ \See the 'Default routes' section of the documentation for more details.
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; R, p1 Y: o  {( T1 i- C' t# x** (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.

) n' D9 A$ V5 R9 x** (process:8797): WARNING **: 13:36:01.052: `gateway4` has been deprecated, use default routes instead.
7 ~# F4 f! }! ?* S9 p$ iSee 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.
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8 l/ ^' _/ @6 O0 N) {5 N** (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.
6 D2 |& T* w  l) C; v* Lroot@compute01:/usr/src#
root@compute01:/usr/src#
% U1 @  W' w/ ?1 o" b- u* w8 y: vroot@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     
  x+ j$ |! s7 B. A
! N) Z& D  R" J8 p5 iDomain is still running. Installation may be in progress.
. L9 o; \; d1 KYou 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
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: W* W8 M$ c, Y( D2 q其他方法：

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6 `3 u' |. @8 B, {: r/ d) c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'>
8 R9 P" C* n9 H8 T1 I. P  <driver name='qemu' type='raw'/>
  <source file='/var/lib/libvirt/images/SLE-12-SP3-Server-DVD-x86_64-GM-DVD1.iso' index='3'/>
  <backingStore/>
3 f( [6 @4 n& D# O  <target dev='sda' bus='sata'/>
  <readonly/>
  <alias name='sata0-0-0'/>
  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
9 J6 a, |# O$ J' K, P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'>
8 P+ v, @' h4 @0 R, N6 \  <driver name='qemu' type='raw'/>
  <backingStore/>
% F; M4 Z& D, t- C3 R% ]5 i  <target dev='sda' bus='sata'/>
  <readonly/>
  <alias name='sata0-0-0'/>
! f2 {1 J* U, C( o3 x  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
然后执行设备更新:

virsh update-device sles12-sp3 detach_iso.xml
此时提示:

( h" r1 Y* U2 Q/ O' k5 ^; IDevice updated successfully
再检查虚拟机配置，就看到iso文件已经卸载了。
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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。

virsh domblklist Windows2019_x86
( p0 y" _! n* b Target   Source
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0 `% `2 F' g7 D/ Z! }3 F3 y vda      /usr/src/Windows2019-x86.qcow2
: z+ F% ~8 y1 j! e sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso
' ]# s1 V, D& Q/ p: y) Z: G sdb      /usr/src/virtio-win-0.1.225.iso

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admin

2.在线调整虚拟机内存(增大或减小)
, \" u/ r6 E* r  Q/ ?#调整为4G
virsh setmem cos_v1 4G

#调整为2G
virsh setmem cos_v1 2G
* q7 H( _: p) h. Q7 |+ j4 Q#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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9 g: l, Y( x; H, }3.在线调整虚拟机CPU(只能增大，不能减小)
virsh setvcpus cos_v1 4
7 t& F5 [. }) w5 [$ Fvirsh setvcpus cos_v1 8
' I* m# F3 k/ F+ Y! I#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


4.在线添加硬盘
" T9 l5 A8 C% b, h* s2 \. S0 \4 w0 s#添加qcow2格式硬盘
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( e1 U6 D9 T6 ?' B5 U# K, }#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
2 a# S& G2 @2 Y. l8 fvirsh 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
& ?' D4 D7 ]4 r#添加raw格式硬盘
% \% I5 t% [  [( d  j' }# K  [#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

# R# U; |; f) D, v% K5.在线移除硬盘
#可以查看虚拟机所有磁盘
( L; Q  F; A. Uvirsh domblklist cos_v1
virsh detach-disk cos_v1 vdb
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1 R7 ^: n. r6 }6.在线添加网卡
virsh 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

7.在线添加光盘
' s0 K, Q5 n+ R! N1 ]$ _1 H& Q2 e5 ivirsh attach-disk centosbase /data_lij/iso/CentOS-6.4-x86_64-bin-DVD1.iso vdd