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Re: [resent] virt-manager connection fails with 'qemu unexpectedly closed the monitor'



(CC'ing a friend who's run into the problem as well)

Hi Laine!

On 12/20/20 7:37 PM, Laine Stump wrote:
> The first step would be to look in /var/log/libvirt/qemu/$guestname.log.
> If qemu is encountering some error, it should be logging a message there
> before it exits. (unless the error is a segfault; in that case I guess
> you'll need to look for a coredump. It will also list exactly the qemu
> commandline that was used.

Except for some unrelated warnings, qemu does not emit any error message:

2020-12-21 11:10:37.580+0000: starting up libvirt version: 6.9.0, package: 1+b2 (amd64 / i386 Build Daemon (x86-ubc-01) <buildd_amd64-x86-ubc-01 buildd debian org> Mon, 07 Dec 2020 09:45:52 +0000), qemu version: 5.2.0Debian 1:5.2+dfsg-2, kernel: 5.9.0-5-amd64, hostname: z6.physik.fu-berlin.de
LC_ALL=C \
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin \
HOME=/var/lib/libvirt/qemu/domain-1-windows7 \
XDG_DATA_HOME=/var/lib/libvirt/qemu/domain-1-windows7/.local/share \
XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain-1-windows7/.cache \
XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain-1-windows7/.config \
QEMU_AUDIO_DRV=spice \
/usr/bin/qemu-system-x86_64 \
-name guest=windows7,debug-threads=on \
-S \
-object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-windows7/master-key.aes \
-machine pc-q35-5.2,accel=kvm,usb=off,vmport=off,dump-guest-core=off,memory-backend=pc.ram \
-cpu Broadwell-IBRS,vme=on,ss=on,vmx=on,pdcm=on,f16c=on,rdrand=on,hypervisor=on,arat=on,tsc-adjust=on,umip=on,md-clear=on,stibp=on,arch-capabilities=on,ssbd=on,xsaveopt=on,pdpe1gb=on,abm=on,ibpb=on,amd-stibp=on,amd-ssbd=on,skip-l1dfl-vmentry=on,pschange-mc-no=on,hv-time,hv-relaxed,hv-vapic,hv-spinlocks=0x1fff \
-m 4096 \
-object memory-backend-ram,id=pc.ram,size=4294967296 \
-overcommit mem-lock=off \
-smp 2,sockets=2,cores=1,threads=1 \
-uuid bb32a4b5-7b2c-4ac2-9a65-8fd2bb9cdb86 \
-no-user-config \
-nodefaults \
-chardev socket,id=charmonitor,fd=33,server,nowait \
-mon chardev=charmonitor,id=monitor,mode=control \
-rtc base=localtime,driftfix=slew \
-global kvm-pit.lost_tick_policy=delay \
-no-hpet \
-no-shutdown \
-global ICH9-LPC.disable_s3=1 \
-global ICH9-LPC.disable_s4=1 \
-boot strict=on \
-device pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x2 \
-device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1 \
-device pcie-root-port,port=0x12,chassis=3,id=pci.3,bus=pcie.0,addr=0x2.0x2 \
-device pcie-root-port,port=0x13,chassis=4,id=pci.4,bus=pcie.0,addr=0x2.0x3 \
-device ich9-usb-ehci1,id=usb,bus=pcie.0,addr=0x1d.0x7 \
-device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pcie.0,multifunction=on,addr=0x1d \
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pcie.0,addr=0x1d.0x1 \
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pcie.0,addr=0x1d.0x2 \
-device virtio-serial-pci,id=virtio-serial0,bus=pci.2,addr=0x0 \
-blockdev '{"driver":"file","filename":"/data/kvm/windows7.img","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
-device ide-hd,bus=ide.0,drive=libvirt-1-format,id=sata0-0-0,bootindex=1 \
-netdev tap,fd=35,id=hostnet0 \
-device e1000e,netdev=hostnet0,id=net0,mac=52:54:00:4b:c5:26,bus=pci.1,addr=0x0 \
-chardev pty,id=charserial0 \
-device isa-serial,chardev=charserial0,id=serial0 \
-chardev spicevmc,id=charchannel0,name=vdagent \
-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 \
-device usb-tablet,id=input0,bus=usb.0,port=1 \
-spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on \
-device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pcie.0,addr=0x1 \
-device ich9-intel-hda,id=sound0,bus=pcie.0,addr=0x1b \
-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 \
-chardev spicevmc,id=charredir0,name=usbredir \
-device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 \
-chardev spicevmc,id=charredir1,name=usbredir \
-device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 \
-device virtio-balloon-pci,id=balloon0,bus=pci.3,addr=0x0 \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
-msg timestamp=on
char device redirected to /dev/pts/0 (label charserial0)
2020-12-21T11:10:37.974205Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(48FH).vmx-exit-load-perf-global-ctrl [bit 12]
2020-12-21T11:10:37.974284Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(490H).vmx-entry-load-perf-global-ctrl [bit 13]
2020-12-21T11:10:37.976069Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(48FH).vmx-exit-load-perf-global-ctrl [bit 12]
2020-12-21T11:10:37.976089Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(490H).vmx-entry-load-perf-global-ctrl [bit 13]
2020-12-21 11:10:38.207+0000: shutting down, reason=failed

> If the message there isn't illuminating enough and you come back here, it would be helpful
> to "bring along" that qemu commandline (and any accompanying error) as well as the output
> of "virsh dumpxml $guestname"

Since libvirt won't create the guest instance in the first place, dumping the XML of the config
like that won't work. However, it's possible to view the XML from the preview window in the
machine details:

<domain type="kvm">
  <name>windows7</name>
  <uuid>bb32a4b5-7b2c-4ac2-9a65-8fd2bb9cdb86</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0";>
      <libosinfo:os id="http://microsoft.com/win/7"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory>4194304</memory>
  <currentMemory>4194304</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch="x86_64" machine="q35">hvm</type>
    <boot dev="hd"/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state="on"/>
      <vapic state="on"/>
      <spinlocks state="on" retries="8191"/>
    </hyperv>
    <vmport state="off"/>
  </features>
  <cpu mode="host-model"/>
  <clock offset="localtime">
    <timer name="rtc" tickpolicy="catchup"/>
    <timer name="pit" tickpolicy="delay"/>
    <timer name="hpet" present="no"/>
    <timer name="hypervclock" present="yes"/>
  </clock>
  <pm>
    <suspend-to-mem enabled="no"/>
    <suspend-to-disk enabled="no"/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type="file" device="disk">
      <driver name="qemu" type="raw"/>
      <source file="/data/kvm/windows7.img"/>
      <target dev="sda" bus="sata"/>
    </disk>
    <controller type="usb" model="ich9-ehci1"/>
    <controller type="usb" model="ich9-uhci1">
      <master startport="0"/>
    </controller>
    <controller type="usb" model="ich9-uhci2">
      <master startport="2"/>
    </controller>
    <controller type="usb" model="ich9-uhci3">
      <master startport="4"/>
    </controller>
    <interface type="network">
      <source network="default"/>
      <mac address="52:54:00:4b:c5:26"/>
      <model type="e1000e"/>
    </interface>
    <console type="pty"/>
    <channel type="spicevmc">
      <target type="virtio" name="com.redhat.spice.0"/>
    </channel>
    <input type="tablet" bus="usb"/>
    <graphics type="spice" port="-1" tlsPort="-1" autoport="yes"/>
    <sound model="ich9"/>
    <video>
      <model type="qxl"/>
    </video>
    <redirdev bus="usb" type="spicevmc"/>
    <redirdev bus="usb" type="spicevmc"/>
  </devices>
</domain>

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz debian org
`. `'   Freie Universitaet Berlin - glaubitz physik fu-berlin de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913


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