我在主机上尝试了这个命令。
virsh snapshot-create-as --domain test_vm_back --name "snapshot-before-install-package" --description "snapshot test"
如您所知，这只是教程中用于创建虚拟机快照的简单命令。虚拟机正在运行。
命令错误。
我在 Google 上搜索了这个错误，但我不明白。这个问题似乎很少见。
error: Requested operation is not valid: cannot migrate domain: Migration disabled: vhost-user backend lacks
VHOST_USER_PROTOCOL_F_LOG_SHMFD feature.; Migration disabled: vhost-user backend lacks VHOST_USER_PROTOCOL_F_LOG_SHMFD
feature.; Migration disabled: vhost-user backend lacks VHOST_USER_PROTOCOL_F_LOG_SHMFD feature.; Migration disabled:
vhost-user backend lacks VHOST_USER_PROTOCOL_F_LOG_SHMFD feature.; non-migratable device:
0000:00:03.1:00.0/vhost-user-fs; non-migratable device: 0000:00:03.0:00.0/vhost-user-fs; non-migratable device:
0000:00:02.7:00.0/vhost-user-fs; non-migratable device: 0000:00:02.6:00.0/vhost-user-fs
主持人的df -H结果
Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0M 0 4.0M 0% /dev
tmpfs 7.7G 0 7.7G 0% /dev/shm
tmpfs 3.1G 121M 3.0G 4% /run
/dev/mapper/rl-root 70G 40G 31G 57% /
/dev/mapper/backup_vg-01_lv 3.4T 2.1T 1.2T 65% /mnt/external_lvm_drive01
/dev/mapper/backup_vg-02_lv 9.3T 8.2T 673G 93% /mnt/external_lvm_drive02
/dev/mapper/rl-home 387G 3.0G 384G 1% /home
/dev/sdc1 1014M 408M 607M 41% /boot
tmpfs 1.6G 56K 1.6G 1% /run/user/42
tmpfs 1.6G 76K 1.6G 1% /run/user/1000
journalctl -f结果
Jan 15 23:14:27 localhost.localdomain polkitd[989]: Registered Authentication Agent for unix-process:575281:207674108
(system bus name :1.5042 [/usr/bin/pkttyagent --process 575281 --notify-fd 5 --fallback], object path
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Jan 15 23:14:27 localhost.localdomain polkitd[989]: Unregistered Authentication Agent for unix-process:575281:207674108
(system bus name :1.5042, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected
from bus)
Linux 发行版
主机和客户端都是Rocky OS 9。
主持人的uname -a结果：
Linux localhost.localdomain 5.14.0-162.6.1.el9_1.0.1.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Nov 28 18:44:09 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
客户端uname -a结果：
Linux localhost.localdomain 5.14.0-162.6.1.el9_1.0.1.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Nov 28 18:44:09 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
主人的virsh dumbxml --domain test_vm_back
<domain type='kvm' id='2'>
<name>test_vm_back</name>
<uuid>ae58c4a4-9103-4103-90c6-30772a45635e</uuid>
<metadata>
<libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
<libosinfo:os id="http://redhat.com/rhel/9.0"/>
</libosinfo:libosinfo>
</metadata>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<memoryBacking>
<source type='memfd'/>
<access mode='shared'/>
</memoryBacking>
<vcpu placement='static'>3</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-q35-rhel9.0.0'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-passthrough' check='none' migratable='on'/>
<clock offset='utc'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/test_vm_back.qcow2' index='2'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu'/>
<target dev='sda' bus='sata'/>
<readonly/>
<alias name='sata0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='qemu-xhci' ports='15'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
</controller>
<controller type='sata' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pcie-root'>
<alias name='pcie.0'/>
</controller>
<controller type='pci' index='1' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='1' port='0x10'/>
<alias name='pci.1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
</controller>
<controller type='pci' index='2' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='2' port='0x11'/>
<alias name='pci.2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
</controller>
<controller type='pci' index='3' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='3' port='0x12'/>
<alias name='pci.3'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
</controller>
<controller type='pci' index='4' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='4' port='0x13'/>
<alias name='pci.4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
</controller>
<controller type='pci' index='5' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='5' port='0x14'/>
<alias name='pci.5'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
</controller>
<controller type='pci' index='6' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='6' port='0x15'/>
<alias name='pci.6'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
</controller>
<controller type='pci' index='7' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='7' port='0x16'/>
<alias name='pci.7'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
</controller>
<controller type='pci' index='8' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='8' port='0x17'/>
<alias name='pci.8'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x7'/>
</controller>
<controller type='pci' index='9' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='9' port='0x18'/>
<alias name='pci.9'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0' multifunction='on'/>
</controller>
<controller type='pci' index='10' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='10' port='0x19'/>
<alias name='pci.10'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
</controller>
<filesystem type='mount' accessmode='passthrough'>
<driver type='virtiofs'/>
<binary path='/usr/libexec/virtiofsd'/>
<source dir='/mnt/external_lvm_drive01/jupyter-config'/>
<target dir='jupyter_shared'/>
<alias name='fs0'/>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<driver type='virtiofs'/>
<binary path='/usr/libexec/virtiofsd'/>
<source dir='/mnt/external_lvm_drive01/task'/>
<target dir='task_shared'/>
<alias name='fs1'/>
<address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<driver type='virtiofs'/>
<binary path='/usr/libexec/virtiofsd'/>
<source dir='/mnt/external_lvm_drive01'/>
<target dir='external_lvm_drive01_shared'/>
<alias name='fs2'/>
<address type='pci' domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<driver type='virtiofs'/>
<binary path='/usr/libexec/virtiofsd'/>
<source dir='/mnt/external_lvm_drive02'/>
<target dir='external_lvm_drive02_shared'/>
<alias name='fs3'/>
<address type='pci' domain='0x0000' bus='0x0a' slot='0x00' function='0x0'/>
</filesystem>
<interface type='bridge'>
<mac address='52:54:00:46:24:b8'/>
<source bridge='br0'/>
<target dev='vnet1'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/1'/>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<channel type='unix'>
<source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-2-test_vm_back/org.qemu.guest_agent.0'/>
<target type='virtio' name='org.qemu.guest_agent.0' state='disconnected'/>
<alias name='channel0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'>
<alias name='input0'/>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'>
<alias name='input1'/>
</input>
<input type='keyboard' bus='ps2'>
<alias name='input2'/>
</input>
<graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'>
<listen type='address' address='127.0.0.1'/>
</graphics>
<audio id='1' type='none'/>
<video>
<model type='vga' vram='16384' heads='1' primary='yes'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
</memballoon>
<rng model='virtio'>
<backend model='random'>/dev/urandom</backend>
<alias name='rng0'/>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</rng>
</devices>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+107:+107</label>
<imagelabel>+107:+107</imagelabel>
</seclabel>
</domain>
答案1
我设法解决了这个问题。
在删除 xml 文件内的 virtiofs（但启用的共享内存不会阻止快照）后/etc/libvirt/qemu，我可以进行快照。
git diff
diff --git a/test_vm_back.xml b/test_vm_back.xml
index c54de19..3397add 100644
--- a/test_vm_back.xml
+++ b/test_vm_back.xml
@@ -109,30 +105,6 @@ or other application using the libvirt API.
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
- <filesystem type='mount' accessmode='passthrough'>
- <driver type='virtiofs'/>
- <source dir='/mnt/external_lvm_drive01/jupyter-config'/>
- <target dir='jupyter_shared'/>
- <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
- </filesystem>
- <filesystem type='mount' accessmode='passthrough'>
- <driver type='virtiofs'/>
- <source dir='/mnt/external_lvm_drive01/torrent'/>
- <target dir='torrent_shared'/>
- <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
- </filesystem>
- <filesystem type='mount' accessmode='passthrough'>
- <driver type='virtiofs'/>
- <source dir='/mnt/external_lvm_drive01'/>
- <target dir='external_lvm_drive01_shared'/>
- <address type='pci' domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
- </filesystem>
- <filesystem type='mount' accessmode='passthrough'>
- <driver type='virtiofs'/>
- <source dir='/mnt/external_lvm_drive02'/>
- <target dir='external_lvm_drive02_shared'/>
- <address type='pci' domain='0x0000' bus='0x0a' slot='0x00' function='0x0'/>
- </filesystem>
<interface type='bridge'>
<mac address='52:54:00:46:24:b8'/>
<source bridge='br0'/>
修复后，不要忘记virsh define --file /etc/libvirt/qemu/test_vm_back.xml