virsh命令详解「建议收藏」
virsh 命令：
- list [–all]： 列出虚拟机
- nodeinfo: 查看真机信息
- nodeinfo: 得到电脑详细配置名字
- nodecpustats: 真机cpu 的状态
- nodemenstats: 真机内存的详细信息
- node-memory-tune: 允许你设置node的内存参数
- capablilities: 打印虚拟机的特点
- freecell: 打印出虚拟I机中可用的内存
命令演示：
[root@desktop ~]# virsh list # 列出所有运行的虚拟机
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
13 cache running
[root@desktop ~]# virsh list --all # 列出所有虚拟机
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
13 cache running
- client shut off
- db1 shut off
- db2 shut off
- dns shut off
[root@desktop vm]# virsh hostname # 列出真机主机名
desktop
[root@desktop vm]# virsh sysinfo # 列出真机的详细信息
<sysinfo type='smbios'>
<bios>
<entry name='vendor'>HP</entry>
<entry name='version'>Q50 Ver. 01.06.04</entry>
<entry name='date'>02/07/2020</entry>
<entry name='release'>6.4</entry>
</bios>
...
</memory_device>
</sysinfo>
[root@desktop vm]# virsh nodecpustats # 得到真机cpu状态
user: 565188290000000
system: 889250070000000
idle: 22823238820000000
iowait: 10113440000000
[root@desktop vm]# virsh nodememstats # 得到真机内存状态
total : 7778448 KiB
free : 469008 KiB
buffers: 136 KiB
cached : 357196 KiB
[root@desktop vm]# virsh node-memory-tune # 允许你设置的node内存参数
Shared memory:
shm_pages_to_scan 1250
shm_sleep_millisecs 21
shm_pages_shared 28710
shm_pages_sharing 133337
shm_pages_unshared 140701
shm_pages_volatile 1451
shm_full_scans 92316
shm_merge_across_nodes 1
[root@desktop vm]# virsh capabilities # 打印虚拟机的特点
<capabilities>
<host>
<uuid>39f13a7f-d328-0fb6-3508-5f1fea3d5774</uuid>
<cpu>
<arch>x86_64</arch>
<model>Skylake-Client-IBRS</model>
<vendor>Intel</vendor>
...
</capabilities>
[root@desktop vm]# virsh freecell # 打印虚拟机中可用内存
Total: 192656 KiBvirsh DOMAIN命令:
- start|shutdown|reboot <vm-name>: 虚拟机启动、停止、重启
- destroy <vm-name>: 强制停止虚拟机
- define <vm-name>.xml: 根据xml文件创建
- undefine <vm-name>: 根据虚拟机名称删除虚拟机
- console <vm-name>: 连接虚拟机的console
- edit <vm-name> : 修改虚拟机配置
- autostart <vm-name>: 设置虚拟机自启动
- domiflist <vm-name>: 查看虚拟机网卡信息
- domblklist <vm-name>: 查看虚拟机硬盘信息
- dominfo <vm-name>: 列出指定虚拟机的信息
- suspend <vm-name>: 挂起指定虚拟机
- resume <vm-name>： 恢复挂起的虚拟机
[root@desktop ~]# virsh list --all
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
16 cache running
18 dns running
- client shut off
- db1 shut off
- db2 shut off
[root@desktop ~]# virsh shutdown dns # 关闭虚拟机dns
Domain dns is being shutdown
[root@desktop ~]# virsh start dns # 启动虚拟机dns
Domain dns started
[root@desktop vm]# virsh dumpxml dns > dns.xml # 导出dns虚拟机的配置文件
[root@desktop vm]# ls
dns.xml
[root@desktop vm]# virsh undefine dns # 删除dns虚拟机
Domain dns has been undefined
[root@desktop vm]# virsh list --all
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
16 cache running
- client shut off
- db1 shut off
- db2 shut off
[root@desktop vm]# virsh define dns.xml # 从xml配置文件生成一个虚拟机
Domain dns defined from dns.xml
[root@desktop vm]# virsh list --all
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
16 cache running
- client shut off
- db1 shut off
- db2 shut off
- dns shut off
[root@desktop vm]# virsh start dns
Domain dns started
[root@desktop vm]# virsh reboot dns # 重启虚拟机dns
Domain dns is being rebooted
[root@desktop vm]# virsh autostart dns # 设置虚拟机dns开机自启
Domain dns marked as autostarted
[root@desktop vm]# virsh autostart --disable dns # 取消虚拟机dns开机自启
Domain dns unmarked as autostarted
[root@desktop vm]# virsh domiflist dns # 显示虚拟机网卡接口
Interface Type Source Model MAC
-------------------------------------------------------
[root@desktop vm]# virsh domblklist dns # 显示虚拟机磁盘文件
Target Source
------------------------------------------------
vda /opt/vm/dns.qcow2
[root@desktop vm]# virsh dominfo dns # 显示虚拟机的信息
Id: 20
Name: dns
UUID: b8024ffe-9c00-4570-a802-72a94e6576ca
OS Type: hvm
State: running
CPU(s): 1
CPU time: 22.1s
Max memory: 2097152 KiB
Used memory: 2097152 KiB
Persistent: yes
Autostart: disable
Managed save: no
Security model: selinux
Security DOI: 0
Security label: system_u:system_r:svirt_t:s0:c502,c596 (enforcing)
[root@desktop vm]# virsh suspend dns # 挂起虚拟机
Domain dns suspended
[root@desktop vm]# virsh list
Id Name State
----------------------------------------------------
1 proxy running
4 web1 running
5 web2 running
16 cache running
20 dns paused
[root@desktop vm]# virsh resume dns # 继续运行挂起的虚拟机
Domain dns resumed
[root@desktop vm]# virsh desc dns # 显示虚拟机的描述信息
No description for domain: dns- domjobabort <vm-name>: 获取虚拟机的当前任务
- dojobinfo <vm-name>: 显示虚拟机的任务
- domstat <vm-name> : 显示虚拟机的状态
- domcontrol<vm-name>: 返回虚拟机的状态ok or error
- dumpxml<vm-name>: 直接显示demo的xml文件配置
- edit <vm-name>: 编辑主机的配置文件
- cpu-stats <vm-name>: 虚拟机的cpu状态
[root@desktop vm]# virsh domjobabort dns
error: Requested operation is not valid: no job is active on the domain
[root@desktop vm]# virsh domjobinfo dns
Job type: None
[root@desktop vm]# virsh domstats dns
Domain: 'dns'
state.state=1
state.reason=5
cpu.time=33212300555
cpu.user=900000000
cpu.system=4380000000
balloon.current=2097152
balloon.maximum=2097152
balloon.swap_in=0
balloon.swap_out=0
balloon.major_fault=189
balloon.minor_fault=161771
balloon.unused=1879292
balloon.available=2046976
balloon.last-update=1647332025
balloon.rss=492880
vcpu.current=1
vcpu.maximum=1
vcpu.0.state=1
vcpu.0.time=23010000000
vcpu.0.wait=0
net.count=0
block.count=1
block.0.name=vda
block.0.path=/opt/vm/dns.qcow2
block.0.rd.reqs=10188
block.0.rd.bytes=281963008
block.0.rd.times=1698863549
block.0.wr.reqs=237
block.0.wr.bytes=10442240
block.0.wr.times=574631962
block.0.fl.reqs=68
block.0.fl.times=195155558
block.0.allocation=31348801024
block.0.capacity=42949672960
block.0.physical=3388030976
[root@desktop vm]# virsh domcontrol dns
ok
[root@desktop vm]# virsh cpu-stats dns
CPU0:
cpu_time 1.840709161 seconds
vcpu_time 0.571028679 seconds
CPU1:
cpu_time 2.275045726 seconds
vcpu_time 0.665116430 seconds
CPU2:
cpu_time 6.915661248 seconds
vcpu_time 5.527787781 seconds
CPU3:
cpu_time 3.793130275 seconds
vcpu_time 2.515854323 seconds
CPU4:
cpu_time 2.442409053 seconds
vcpu_time 1.154978564 seconds
CPU5:
cpu_time 4.330489085 seconds
vcpu_time 3.044157700 seconds
CPU6:
cpu_time 1.997121055 seconds
vcpu_time 0.439759919 seconds
CPU7:
cpu_time 10.725541636 seconds
vcpu_time 9.225345458 seconds
Total:
cpu_time 34.320107239 seconds
user_time 0.900000000 seconds
system_time 4.400000000 seconds- screenshot <vm-name>: 虚拟机截屏
- setmen <vm-name> size: 设置虚拟机的内存
- setmaxmen <vm-name> 设置虚拟机的最大内存
- memtune <vm-name> 得到虚拟机分区的信息
- blkiotune <vm-name> 得到虚拟机的磁盘信息
- setvcpus（<vm-name> count） 设置虚拟机的虚拟cpu个数
- dompmwakeup(<vm-name>) 唤醒挂起的vm-name
- ttyconsole <vm-name> 输出设备用的终端
- vcpucount <vm-name> 得到cpu个数
- vcpuinfo<vm-name> 得到cpu的信息
- vncdisplay<vm-name> 显示虚拟机vnc连接信息
[root@desktop ~]# virsh memtune dns # 得到虚拟机分区的信息
hard_limit : unlimited
soft_limit : unlimited
swap_hard_limit: unlimited
[root@desktop ~]# virsh blkiotune dns # 得到虚拟机的磁盘信息
weight : 500
device_weight :
device_read_iops_sec:
device_write_iops_sec:
device_read_bytes_sec:
device_write_bytes_sec:
[root@desktop ~]# virsh ttyconsole dns # 输出设备用的终端
/dev/pts/13
[root@desktop ~]# virsh vcpucount dns # 获取虚拟机cpu数目
maximum config 1
maximum live 1
current config 1
current live 1
[root@desktop ~]# virsh vcpuinfo dns # Huoqu虚拟机CPU信息
VCPU: 0
CPU: 1
State: running
CPU time: 27.0s
CPU Affinity: yyyyyyyy
[root@desktop ~]# virsh vncdisplay dns # 显示虚拟机vnc连接信息
:4
[root@desktop ~]# virsh dumpxml proxy | grep mac # 宿主机上获取虚拟机proxy的IP地址
<partition>/machine</partition>
<type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
<mac address='52:54:00:47:14:ea'/>
<mac address='52:54:00:85:73:e9'/>
[root@desktop ~]#
[root@desktop ~]#
[root@desktop ~]# arp -a | grep '52:54:00:47:14:ea'
? (192.168.3.3) at 52:54:00:47:14:ea [ether] on br5virsh 虚拟网络管理：
- net-autostart <networkname> 自动启动网卡（default）
- net-define <file> 把配置加载到文件
- net-destory <networkname> 关闭网卡
- net-dumpxml <networkname> 把网卡配置加载到文件
- net-edit <networkname> 编辑网卡信息
- net-info <networkname> 网卡信息
- net-list 显示网卡
- net-uuid <networkname> 得到网卡的id
- net-name <id> 得到网卡的名字
- net-start <networkname> 开启网卡
[root@desktop vm]# virsh net-list --all # 显示所有虚拟网络
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
lab active yes yes
office active yes yes
[root@desktop vm]# virsh net-define lab2.xml # 从配置文件生成一个虚拟网络
Network lab2 defined from lab2.xml
[root@desktop vm]# virsh net-list --all
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
lab active yes yes
lab2 inactive no yes
office active yes yes
[root@desktop vm]# virsh net-dumpxml lab > lab.xml # 把虚拟网络配置保存到文件
[root@desktop vm]# virsh net-info lab
Name: lab
UUID: ed7ac3a2-da2b-4511-bdcc-e385d029dbd9
Active: yes
Persistent: yes
Autostart: yes
Bridge: virbr2
[root@desktop vm]# virsh net-uuid lab # 得到虚拟的uuid
ed7ac3a2-da2b-4511-bdcc-e385d029dbd9
[root@desktop vm]# virsh net-start lab2 # 启动虚拟网络
Network lab2 started
[root@desktop vm]# virsh net-list --all
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
lab active yes yes
lab2 active no yes
office active yes yes
[root@desktop vm]# virsh net-destroy lab2 ￥ 停止指定的虚拟网络
Network lab2 destroyed
[root@desktop vm]# virsh net-list --all
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
lab active yes yes
lab2 inactive no yes
office active yes yes
[root@desktop vm]# virsh net-undefine lab2 # 删除指定的虚拟网络
Network lab2 has been undefined
[root@desktop vm]# virsh net-list --all
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
lab active yes yes
office active yes yes设备命令：
- attach-device (<vm-name> file) 使用XML文件中设备定义在虚拟机中添加设备
- attach-disk (<vm-name> ) 添加磁盘文件
- attach-interface (<vm-name> type source ) 添加一个接口
- update-device (<vm-name> file) 更新设备根据file
[root@desktop vm]# qemu-img create -f qcow2 test1.qcow2 1g # 创建一个1G磁盘的磁盘文件
Formatting 'test1.qcow2', fmt=qcow2 size=1073741824 encryption=off cluster_size=65536 lazy_refcounts=off
[root@desktop vm]# qemu-img create -f qcow2 test2.qcow2 1g # # 创建一个1G磁盘的磁盘文件
Formatting 'test2.qcow2', fmt=qcow2 size=1073741824 encryption=off cluster_size=65536 lazy_refcounts=off
[root@desktop vm]# ls
dns.xml installdisk.xml lab2.xml lab.xml test1.qcow2 test2.qcow2
[root@desktop vm]# cat installdisk.xml # 编辑一个xml文件
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/root/vm/test1.qcow2'/>
<target dev='vdb'/>
</disk>
[root@desktop ~]# virsh domblklist dns # 查看虚拟机的磁盘文件
Target Source
------------------------------------------------
vda /opt/vm/dns.qcow2
[root@desktop vm]# virsh attach-device --domain dns installdisk.xml # 使用XML文件中的设备定义在虚拟机中添加设备
Device attached successfully
[root@desktop vm]# virsh domblklist dns
Target Source
------------------------------------------------
vda /opt/vm/dns.qcow2
vdb /root/vm/test1.qcow2
[root@desktop vm]# virsh attach-disk --domain dns --source /root/vm/test2.qcow2 --target vdc --subdriver qcow2 --config --live # 虚拟机添加磁盘文件
Disk attached successfully
[root@desktop vm]# virsh domblklist dns
Target Source
------------------------------------------------
vda /opt/vm/dns.qcow2
vdb /root/vm/test1.qcow2
vdc /root/vm/test2.qcow2
[root@desktop vm]# virsh detach-disk dns vdc # 从虚拟机删除磁盘
Disk detached successfully
[root@desktop vm]# virsh detach-disk dns vdb
Disk detached successfully
[root@desktop vm]# virsh domblklist dns
Target Source
------------------------------------------------
vda /opt/vm/dns.qcow2
[root@desktop vm]# virsh domiflist dns
Interface Type Source Model MAC
-------------------------------------------------------
[root@desktop vm]# virsh attach-interface dns --type network --source default --model virtio # 添加网卡，连接虚拟网络
Interface attached successfully
[root@desktop vm]# virsh domiflist dns
Interface Type Source Model MAC
-------------------------------------------------------
vnet5 network default virtio 52:54:00:4d:69:d7接口命令：
- iface-define（file） 从文件里面定义一个接口
- iface-dumpxml （lo） 显示接口的信息
- iface-edit（lo） 编辑接口
- iface-list 列出所有的接口
- iface-name （mac） 根据mac得到名字
- iface-mac (lo) 根据名字得到mac
- iface-start （lo） 开启接口
- iface-unbriged 解绑定网桥
- iface-undefine（lo） 不定义配置文件
- iface-begin（lo） 创建一个现有的接口设置
- iface-commit 提交所有的改变有效，并且让接口工作
- iface-rollbak 接口回滚
[root@desktop vm]# virsh iface-list --all # 列出所有网卡 Name State MAC Address--------------------------------------------------- br5 active 00:0e:c6:82:4c:a0 eno1 active 84:a9:3e:82:23:37 enp1s0f0 inactive 6c:b3:11:40:f1:46 enp1s0f1 inactive 6c:b3:11:40:f1:47 lo active 00:00:00:00:00:00[root@desktop vm]# virsh iface-dumpxml eno1 # 输出指定网卡信息<interface type='ethernet' name='eno1'> <protocol family='ipv4'> <ip address='192.168.50.228' prefix='24'/> </protocol> <protocol family='ipv6'> <ip address='fe80::5669:5b18:2f36:2137' prefix='64'/> </protocol> <link speed='1000' state='up'/> <mac address='84:a9:3e:82:23:37'/></interface>[root@desktop vm]# virsh iface-mac eno1 # 根据网卡名获取MAC地址84:a9:3e:82:23:37[root@desktop vm]# virsh iface-name 84:a9:3e:82:23:37 # 根据MAC地址获取网卡名eno1存储池命令：
- pool-auto （pool） 标记池自动启动
- pool-build（pool） 建造一个池
- pool-create（file） 根据文件创建池
- pool-define（file） 定义但是不开启
- pool-destory（pool） 销毁池，以后能恢复
- pool-delete（pool） 删除池，以后不能恢复
- pool-dumpxml（pool） 查看池的定义文件
- pool-edit（pool） 编辑池的定义文件
- pool-info 池的信息
- pool-list 显示池列表
- pool-name（id） 根据id得到name
- pool-start（poop） 开启池
- pool-uuid （pool） 返回一个池的uuid
[root@desktop vm]# virsh pool-list --all # 列出所有池
Name State Autostart
-------------------------------------------
bl02u2_test active yes
default active yes
Downloads active yes
images active yes
images-1 active yes
opt active yes
root active yes
vm active yes
[root@desktop vm]# virsh pool-info vm # 列出池vm的信息
Name: vm
UUID: 6820e7d5-3210-496e-8573-5a19907b034e
State: running
Persistent: yes
Autostart: yes
Capacity: 325.81 GiB
Allocation: 90.34 GiB
Available: 235.46 GiB
[root@desktop vm]# virsh pool-uuid vm # 获取池vm的uuid
6820e7d5-3210-496e-8573-5a19907b034e
[root@desktop vm]# virsh pool-dumpxml vm # 查看池的定义文件
<pool type='dir'>
<name>vm</name>
<uuid>6820e7d5-3210-496e-8573-5a19907b034e</uuid>
<capacity unit='bytes'>349831188480</capacity>
<allocation unit='bytes'>97005137920</allocation>
<available unit='bytes'>252826050560</available>
<source>
</source>
<target>
<path>/opt/vm</path>
<permissions>
<mode>0755</mode>
<owner>0</owner>
<group>0</group>
<label>unconfined_u:object_r:usr_t:s0</label>
</permissions>
</target>
</pool>
[root@desktop vm]# virsh pool-dumpxml images-1 > images-1.xml # 将池信息保存到xml文件中
[root@desktop vm]# virsh pool-destroy images-1 # 停止一个池
Pool images-1 destroyed
[root@desktop vm]# virsh pool-list --all
Name State Autostart
-------------------------------------------
bl02u2_test active yes
default active yes
Downloads active yes
images active yes
images-1 inactive yes
opt active yes
root active yes
vm active yes
[root@desktop vm]# virsh pool-delete images-1 # 删除一个池
Pool images-1 deleted
[root@desktop vm]# virsh pool-define images-1.xml # 从定义文件生成一个池
Pool images-1 defined from images-1.xml
[root@desktop vm]# virsh pool-start images-1 # 启动一个池
Pool images-1 started
[root@desktop vm]# virsh pool-list
Name State Autostart
-------------------------------------------
bl02u2_test active yes
default active yes
Downloads active yes
images active yes
images-1 active no
opt active yes
root active yes
vm active yes
[root@desktop vm]# virsh pool-autostart images-1 # 标记指定池自动启动
Pool images-1 marked as autostarted
[root@desktop vm]# virsh pool-list
Name State Autostart
-------------------------------------------
bl02u2_test active yes
default active yes
Downloads active yes
images active yes
images-1 active yes
opt active yes
root active yes
vm active yes卷命令：
- vol-delete（pool） 卷的删除
- vol-upload（pool） 卷的加载
- vol-list（pool） 列出卷
- vol-info（default） 卷的信息
- vol-name（path） 得到卷的名字
[root@desktop vm]# virsh vol-list vm # 查看指定池中的卷
Name Path
------------------------------------------------------------------------------
@1@p /opt/vm/@1@p
cache.qcow2 /opt/vm/cache.qcow2
centos2.raw /opt/vm/centos2.raw
client.qcow2 /opt/vm/client.qcow2
db1.qcow2 /opt/vm/db1.qcow2
db2.qcow2 /opt/vm/db2.qcow2
disk1.qcow2 /opt/vm/disk1.qcow2
disk2.qcow2 /opt/vm/disk2.qcow2
disk3.qcow2 /opt/vm/disk3.qcow2
disk4.qcow2 /opt/vm/disk4.qcow2
disk5.qcow2 /opt/vm/disk5.qcow2
disk6.qcow2 /opt/vm/disk6.qcow2
disk7.qcow2 /opt/vm/disk7.qcow2
disk8.qcow2 /opt/vm/disk8.qcow2
dns.qcow2 /opt/vm/dns.qcow2
dsik9.qcow2 /opt/vm/dsik9.qcow2
nfs.qcow2 /opt/vm/nfs.qcow2
proxy.qcow2 /opt/vm/proxy.qcow2
Server.qcow2 /opt/vm/Server.qcow2
test1.qcow2 /opt/vm/test1.qcow2
test2.qcow2 /opt/vm/test2.qcow2
upload.txt /opt/vm/upload.txt
web01.qcow2 /opt/vm/web01.qcow2
web02.qcow2 /opt/vm/web02.qcow2
web03.qcow2 /opt/vm/web03.qcow2
web04.qcow2 /opt/vm/web04.qcow2
web1.qcow2 /opt/vm/web1.qcow2
web2.qcow2 /opt/vm/web2.qcow2
[root@desktop vm]# virsh vol-info test1.qcow2 vm # 查看存储池vm中的卷test1.qcow的信息
Name: test1.qcow2
Type: file
Capacity: 1.00 GiB
Allocation: 196.00 KiB
[root@desktop vm]# virsh vol-clone test1.qcow2 test1back.qcow2 vm # 在存储池中克隆卷test1.qcow2为卷test1back.qcow2
Vol test1back.qcow2 cloned from test1.qcow2
[root@desktop vm]# virsh vol-delete test1back.qcow2 vm # 删除存储池中卷test1back.qcow2
Vol test1back.qcow2 deleted
[root@desktop vm]# virsh vol-dumpxml test1.qcow2 vm > test1.xml # 保存存储池中存储卷test1.qcow2的配置到test1.xml
[root@desktop vm]# virsh vol-delete test1.qcow2 vm
Vol test1.qcow2 deleted
[root@desktop vm]# virsh vol-create vm test1.xml # 用配置文件test1.xml在存储池中生成一个卷
Vol test1.qcow2 created from test1.xml快照管理：
- snapshot-create 使用 XML 生成快照
- snapshot-create-as 使用一组参数生成快照
- snapshot-current 获取或者设定当前快照
- snapshot-delete 删除域快照
- snapshot-dumpxml 为域快照转储 XML
- snapshot-edit 编辑快照 XML
- snapshot-info 快照信息
- snapshot-list 为域列出快照
- snapshot-parent 获取快照的上级快照名称
- snapshot-revert 从快照恢复
[root@desktop ~]# virsh snapshot-list dns # 列出虚拟机dns的快照
Name Creation Time State
------------------------------------------------------------
[root@desktop ~]# virsh snapshot-create-as --name dns-v1 --domain dns # 为虚拟机生成快照dns-v1
Domain snapshot dns-v1 created
[root@desktop ~]# virsh snapshot-list dns
Name Creation Time State
------------------------------------------------------------
dns-v1 2022-03-16 09:52:22 +0800 running
[root@desktop ~]# virsh snapshot-revert --domain dns --snapshotname dns-v1 # 从快照恢复
[root@desktop ~]# virsh snapshot-current --domain dns # 获取当前快照
<domainsnapshot>
<name>dns-v1</name>
<state>running</state>
<creationTime>1647395542</creationTime>
<memory snapshot='internal'/>
<disks>
<disk name='vda' snapshot='internal'/>
</disks>
...
</domainsnapshot>
[root@desktop ~]# virsh snapshot-info --domain dns --snapshotname dns-v1 # 输出指定的快照信息
Name: dns-v1
Domain: dns
Current: yes
State: running
Location: internal
Parent: -
Children: 0
Descendants: 0
Metadata: yes
[root@desktop ~]# virsh snapshot-delete --domain dns --snapshotname dns-v1 # 删除快照
Domain snapshot dns-v1 deleted
[root@desktop ~]# virsh snapshot-list dns
Name Creation Time State
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