Member Avatar for damijay

Hi guys,

I'm trying to install a virtual machine; OS = kubuntu 14.04LTS using virtual machine manager on an external hard disk. My PC's OS is 12.04LTS(kubuntu) Precise Pangolin. Everything goes ahead (relatively) smoothly on VMM till its time to actually install the OS and create a domain. I then get the error message below:

"Unable to complete install: 'Unable to read from monitor: Connection reset by peer'

Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper
callback(asyncjob, *args, **kwargs)`
File "/usr/share/virt-manager/virtManager/create.py", line 1909, in do_install
guest.start_install(False, meter=meter)
File "/usr/lib/python2.7/dist-packages/virtinst/Guest.py", line 1236, in start_install
noboot)
File "/usr/lib/python2.7/dist-packages/virtinst/Guest.py", line 1304, in _create_guest
dom = self.conn.createLinux(start_xml or final_xml, 0)
File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2166, in createLinux
if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: Unable to read from monitor: Connection reset by peer"

Has anyone experienced such an error and how did you resolve it?

All help and assistance is deeply appreciated.

Thank you.

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  • Latest Post Latest Post by rubberman

Dani AI

Generated

A few practical notes tied to the thread: that libvirt/ QEMU “monitor connection reset” generally means the QEMU process closed its monitor socket (crashed or hit an I/O/permission error). Common triggers are bad install media, storage I/O problems (external USB/NTFS drives that spin down or lock), missing KVM support, or security/profile restrictions. As discovered, a corrupt ISO is a frequent culprit; ’s point about VirtualBox is also relevant — different hypervisors surface different failure modes.

Quick checklist to try when this happens:

sha256sum /path/to/installer.iso
cp /path/to/installer.iso /tmp/            # test from local disk (ext4)
egrep -c "(vmx|svm)" /proc/cpuinfo && lsmod | grep kvm
sudo modprobe kvm_intel   # or kvm_amd
sudo service libvirt-bin restart   # older Ubuntu
sudo systemctl restart libvirtd    # systemd systems
sudo tail -n 200 /var/log/libvirt/qemu/*.log /var/log/syslog

Additional tips: avoid running install media off an external NTFS/Windows-formatted disk — copy it to a local ext4 partition before creating the VM. If using virt-manager and the guest mouse disappears, add a “USB tablet” or “tablet” input device and/or enable SPICE/QXL and install spice-vdagent/qemu-guest-agent inside the guest. If logs show I/O or AppArmor denials, focus on storage permissions and the libvirt/AppArmor configuration next.

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Member Avatar for rubberman

I have to assume you are running VMware and VirtualBox? In either case, I haven't seen this error. It may be that your OS image that your are trying to install is corrupted. Try another.

Member Avatar for damijay

Thanks @ rubberman. Virtual box was the only package i installed. I resolved this last week; the .iso image was corrupted and i had to try another which installed seamlessly. Unfortunately, i had issues (disappearing mouse)with VMM(virt-manager) which comes by default on precise pangolin so i switched completely to Oracle Virtual box.

Member Avatar for rubberman

I've had very good luck with VirtualBox - been using it constantly for almost 10 years now. Very solid. At work we use VMware and have a tonne of ESXi servers and run VMware workstation on our laptops as well. Seems very solid also.

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