virsh 在线添加设备cdrom或者iso镜像

admin

virsh 在线添加设备cdrom或者iso镜像
( ^3 a1 }4 v' Gvirsh domblklist Windows2019_x86
Target   Source
----------------------------------------------------------------
vda      /usr/src/Windows2019-x86.qcow2
' M7 E6 c0 d5 u' Z sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso



virsh attach-disk  Windows2019_x86 --target sdb   --type cdrom  /usr/src/virtio-win-0.1.225.iso  --mode readonly  
3 I# I7 K8 W; a2 [  X: p  Terror: Failed to attach disk
) J& k3 h* N6 f4 x% X1 }, Oerror: Operation not supported: cdrom/floppy device hotplug isn't supported



root@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
error: 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
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root@compute01:/usr/src# virsh attach-disk  Windows2019_x86 /usr/src/virtio-win-0.1.225.iso vdc --cache none --subdriver qcow2 --config --persistent
# F9 H4 i4 u3 k+ r3 @( N7 U( Q& gerror: Failed to attach disk
# ?* s& h" Z9 o; Merror: internal error: unable to execute QEMU command 'blockdev-add': Image is not in qcow2 format
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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
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Starting install...
7 c: s6 ^1 b( l1 R1 _ERROR    Cannot get interface MTU on 'br0': No such device
3 N: I/ X4 \# ~+ h3 C) }) }3 yDomain installation does not appear to have been successful.
If it was, you can restart your domain by running:
0 m1 ^% l' G2 Q. C5 Z8 H& m1 ~6 q6 i  virsh --connect qemu:///system start Windows2019_x86
otherwise, please restart your installation.
5 R( s, o7 o/ H7 Q" o' @6 t+ {, wroot@compute01:/usr/src#
3 v2 H) ~; h) [( z7 a$ B, ^root@compute01:/usr/src#
root@compute01:/usr/src# netplan apply

! h: P9 E& n$ U. [** (generate:8799): WARNING **: 13:35:59.651: `gateway4` has been deprecated, use default routes instead.
0 ^# V  Z8 ~+ i+ f. ]5 }See the 'Default routes' section of the documentation for more details.
- M1 N( m0 b; q" n0 |% N
** (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.
9 _& G6 ~/ \, P" h9 Q# j
** (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.

* C& d# z( z# u9 I) P8 m9 l7 m. I% C** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
% l3 \/ Z& ~; ?8 u; D1 }See the 'Default routes' section of the documentation for more details.

0 R: ~- W1 H4 g7 ]** (process:8797): WARNING **: 13:36:01.589: `gateway4` has been deprecated, use default routes instead.
! i: N( b8 [1 e, }; LSee the 'Default routes' section of the documentation for more details.
root@compute01:/usr/src#
root@compute01:/usr/src#
8 c/ X7 x% B9 ~$ {/ @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
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8 M0 a; Z' [7 t* NStarting install...
Creating domain...                                          |    0 B  00:00:00     
8 v: r- C& t& G( `( B. H* l
8 b0 [& v$ t, a8 KDomain is still running. Installation may be in progress.
; b+ j" b1 c( P" ^, YYou 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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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'>
, Q' Q2 M7 w1 [# ]  <driver name='qemu' type='raw'/>
  <source file='/var/lib/libvirt/images/SLE-12-SP3-Server-DVD-x86_64-GM-DVD1.iso' index='3'/>
& }; N: F% Y5 U6 f: c  <backingStore/>
: _& l8 m) t, h, G9 d$ T# ^( b  <target dev='sda' bus='sata'/>
  <readonly/>
0 p: y5 K8 h$ H/ c  `( ~  <alias name='sata0-0-0'/>
  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
. d& a- y  S3 G" ^$ E* ^</disk>
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:

" d* R+ o) Y6 ~" ]<disk type='file' device='cdrom'>
# K. r- ~7 z3 J1 L9 h/ p  <driver name='qemu' type='raw'/>
5 `* ~, I1 h* q  q; Z* P, v) i  <backingStore/>
% u+ g) f/ v1 ?3 u  <target dev='sda' bus='sata'/>
  <readonly/>
4 U% m. u7 {, g, K+ n0 E: ]  <alias name='sata0-0-0'/>
  <address type='drive' controller='0' bus='0' target='0' unit='0'/>
1 S( o) k: C4 I, M+ @) ]</disk>
然后执行设备更新:
/ u# ?1 m- z; J; v- c: ~
, Y1 i% _% z- t/ g" rvirsh update-device sles12-sp3 detach_iso.xml
此时提示:
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5 z; u9 J. H* Z  j: XDevice updated successfully
8 H  o* D! ]" B2 t" d2 w( m0 x5 o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
6 n5 x( y" U3 u1 s$ _ Target   Source
; o( z# m- w. y: ?) t( Y! r----------------------------------------------------------------
% o1 A" g1 Z& k) }3 K$ \+ I2 E vda      /usr/src/Windows2019-x86.qcow2
/ I: d/ h+ @2 l4 ? sda      /usr/src/cn_windows_server_2019_x64_dvd_2d80e042.iso
. J, _  N( A1 \& E, e1 E5 ]; A 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)
; c. a: f8 ]$ W#调整为4G
" F6 [: Y/ \, W- ^: ?0 Z4 `virsh setmem cos_v1 4G
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#调整为2G
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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# W% o8 A" ~% A9 ~3.在线调整虚拟机CPU(只能增大，不能减小)
virsh setvcpus cos_v1 4
7 z( B+ j" n: J* s2 \" g4 xvirsh setvcpus cos_v1 8
#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


" S9 Y0 n. y$ M8 b9 {/ I5 N! k* F9 d4.在线添加硬盘
#添加qcow2格式硬盘
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( }' T7 c1 s) u5 h* u#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
/ ^8 ^9 }2 e/ {2 S  _virsh attach-disk cos_v1 /data/vhosts/test/cos_v1-add1.disk vdb --cache none --subdriver qcow2 --config --persistent
% m& ?7 j3 L) J) e& {#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
#添加raw格式硬盘
#创建raw格式的新磁盘,大小为40G
+ b1 u  N7 u% `qemu-img create -f raw /data/vhosts/test/cos_v1-add2.disk 40G
3 l" \  B/ W$ E4 avirsh attach-disk lnmptest-107 /data/vhosts/test/cos_v1-add2.disk vdc --cache none --subdriver raw --config --persistent

9 Q$ C9 E/ p& {. _: _! N0 A% y5.在线移除硬盘
; b% [. O; ?1 w$ |#可以查看虚拟机所有磁盘
( q+ L" l; n/ W1 Ivirsh domblklist cos_v1
virsh detach-disk cos_v1 vdb
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6.在线添加网卡
' \- n$ O8 _' [+ R2 A! N0 bvirsh 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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9 q8 L; Z$ r: b: l  f7.在线添加光盘
& m/ U/ K' A/ q8 n( m& q% Z$ J, ~virsh attach-disk centosbase /data_lij/iso/CentOS-6.4-x86_64-bin-DVD1.iso vdd