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|
hot-plugged interface are not working after live migration
Description of problem:
After a live migration are perform for a vm then hot-plug interface pci didn't show up, but did found a SCSI storage controller is created. I checked libvirt did send qmp command to qemu `[pid 320011] 1673945683.378537 write(42, "{"execute":"device_add","arguments":{"driver":"virtio-net-pci","netdev":"hostua-test","id":"ua-test","mac":"00:e0:4c:6a:3b:51","bus":"pci.7","addr":"0x0"},"id":"libvirt-200"}rn", 176) = 176
`
Steps to reproduce:
1. Perform a live migration by issue command `virsh migrate --live --persistent --verbose --unsafe --p2p demo-vm qemu+tls://node8/system?pkipath=/etc/pki/libvirt/private/`
2. Then on the destination node that vm moved, create a bridge deivce `ip link add br-test1 type bridge`
3. Create a tap.xml file with following code
```
<interface type='bridge'>
<mac address='00:e0:4c:6a:3b:51'/>
<source bridge='br-test1'/>
<model type="virtio"/>
<alias name='ua-test'/>
</interface>
```
4. Save origin pci information
```
$ virsh console demo-vm
# Save origin pci information
[root@demo-vm ~]# lshw > before
```
5. Hot-plug an interface `virsh attach-device demo-vm tap.xml-backup --live --config`
6. Dumpxml of demo-vm
```
<domain type='kvm' id='226'>
<name>demo-vm</name>
<uuid>cc74b867-3fb4-5e4f-bbce-33df21a89416</uuid>
<metadata>
<kubevirt xmlns="http://kubevirt.io">
<uid>79db3d82-ce8f-44e8-96a5-940cc37c0064</uid>
<graceperiod>
<deletionGracePeriodSeconds>30</deletionGracePeriodSeconds>
</graceperiod>
</kubevirt>
</metadata>
<maxMemory slots='16' unit='KiB'>134217728</maxMemory>
<memory unit='KiB'>1048576</memory>
<currentMemory unit='KiB'>1048576</currentMemory>
<vcpu placement='static' current='1'>128</vcpu>
<iothreads>1</iothreads>
<resource>
<partition>/machine</partition>
</resource>
<sysinfo type='smbios'>
<system>
<entry name='uuid'>cc74b867-3fb4-5e4f-bbce-33df21a89416</entry>
</system>
</sysinfo>
<os>
<type arch='x86_64' machine='pc-q35-rhel8.6.0'>hvm</type>
<smbios mode='sysinfo'/>
</os>
<features>
<acpi/>
</features>
<cpu mode='custom' match='exact' check='full'>
<model fallback='forbid'>Skylake-Server-IBRS</model>
<vendor>Intel</vendor>
<topology sockets='128' dies='1' cores='1' threads='1'/>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='pdcm'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='pku'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='ibrs'/>
<feature policy='require' name='amd-stibp'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='require' name='pschange-mc-no'/>
<feature policy='disable' name='mpx'/>
<numa>
<cell id='0' cpus='0-127' memory='1048576' unit='KiB'/>
</numa>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='network' device='disk' model='virtio-non-transitional'>
<driver name='qemu' type='raw' error_policy='stop' discard='unmap'/>
<auth username='rbd-provisioner'>
<secret type='ceph' uuid='8fedf300-282c-4531-a66d-ca2691aaa88b'/>
</auth>
<source protocol='rbd' name='demo-pool/vol-5e83bed9-a2a3-11ed-bee4-3cfdfee07278' index='2'>
<host name='xx.xx.xx.xx' port='6789'/>
<host name='xx.xx.xx.xx' port='6789'/>
<host name='xx.xx.xx.xx' port='6789'/>
</source>
<target dev='vda' bus='virtio'/>
<boot order='1'/>
<alias name='ua-bootdisk'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
</disk>
<disk type='file' device='disk' model='virtio-non-transitional'>
<driver name='qemu' type='raw' cache='writethrough' error_policy='stop' discard='unmap'/>
<source file='/var/run/kubevirt-ephemeral-disks/cloud-init-data/demo-vm/configdrive.iso' index='1'/>
<backingStore/>
<target dev='vdb' bus='virtio'/>
<alias name='ua-cloudinitdisk'/>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
</disk>
<controller type='usb' index='0' model='none'>
<alias name='usb'/>
</controller>
<controller type='scsi' index='0' model='virtio-non-transitional'>
<alias name='scsi0'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0' model='virtio-non-transitional'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
</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='0x18'/>
<alias name='pci.8'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0' multifunction='on'/>
</controller>
<controller type='pci' index='9' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='9' port='0x19'/>
<alias name='pci.9'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x1'/>
</controller>
<controller type='pci' index='10' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='10' port='0x1a'/>
<alias name='pci.10'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x2'/>
</controller>
<controller type='pci' index='11' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='11' port='0x1b'/>
<alias name='pci.11'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x3'/>
</controller>
<controller type='pci' index='12' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='12' port='0x1c'/>
<alias name='pci.12'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x4'/>
</controller>
<controller type='sata' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<interface type='ethernet'>
<mac address='00:00:00:6a:d3:bc'/>
<target dev='e6250550b78a43a' managed='yes'/>
<model type='virtio'/>
<mtu size='1500'/>
<alias name='ua-attachnet1'/>
<rom enabled='no'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='00:e0:4c:6a:3b:51'/>
<source bridge='br-test1'/>
<target dev='vnet5'/>
<model type='virtio'/>
<alias name='ua-test'/>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/31'/>
<log file='/var/log/vm/79db3d82-ce8f-44e8-96a5-940cc37c0064/console.log' append='off'/>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/31'>
<source path='/dev/pts/31'/>
<log file='/var/log/vm/79db3d82-ce8f-44e8-96a5-940cc37c0064/console.log' append='off'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<channel type='unix'>
<source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-226-demo-vm/org.qemu.guest_agent.0'/>
<target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
<alias name='channel0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='mouse' bus='ps2'>
<alias name='input0'/>
</input>
<input type='keyboard' bus='ps2'>
<alias name='input1'/>
</input>
<graphics type='vnc' port='5920' autoport='yes' listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</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-non-transitional'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+107:+107</label>
<imagelabel>+107:+107</imagelabel>
</seclabel>
</domain>
```
7. Console to vm and check pci
```
$ virsh console demo-vm
# no additional nic found in `ip a` list
[root@demo-vm ~]# ip a
# Compare pci
[root@demo-vm ~]# lshw > after
# instead of a virtio network pci i saw a virtio SCSI is created
[root@demo-vm ~]# diff before after
# output
*-scsi
description: SCSI storage controller
product: Virtio SCSI
vendor: Red Hat, Inc.
physical id: 0
bus info: pci@0000:02:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: scsi msix pm pciexpress bus_master cap_list
configuration: driver=virtio-pci latency=0
resources: irq:22 memory:fe600000-fe600fff memory:fc400000-fc403fff
```
Additional information:
|