Created attachment 1651807 [details]
virt-install.log.1 from /root/.cache/virt-manager/

Description of problem:

Provisioning of virtual machines in Anaconda nightly kickstart tests (nested virtualization in OpenStack) sometimes (~10/180 cases) fails with

ERROR (cli:257) Invalid machine name

Version-Release number of selected component (if applicable):

Updated Fedora-Cloud-Base-30 image
libivrt-daemon-5.1.0-9

How reproducible:

Sometimes

Steps to Reproduce:
1. See the attached logs (virt-install.log) for virt-install command causing the fail:

[Fri, 10 Jan 2020 14:09:57 virt-install 31418] DEBUG (cli:203) Launched with command line: /usr/share/virt-manager/virt-install -n kstest-network-device-default-httpks_(c9eed63e-981e-48ec-acdc-56b3f8c5f678) -r 2048 --noautoconsole --vcpus 1 --rng /dev/random --noreboot --graphics vnc --disk path=/var/tmp/kstest-network-device-default-httpks.lshs63b_/disk-a.img,cache=unsafe,bus=sata --disk path=/var/tmp/kstest-network-device-default-httpks.lshs63b_/boot.kstest.iso,device=cdrom,readonly=on,shareable=on --extra-args  debug=1 inst.debug text rd.shell=0 rd.emergency=poweroff ip=enp1s0:dhcp inst.ks=http://10.0.137.173:40001/ks.cfg inst.kernel.hung_task_timeout_secs=1200 stage2=hd:CDLABEL=Fedora-E-dvd-x86_64-rawh --location /var/tmp/kstest-network-device-default-httpks.lshs63b_/boot.kstest.iso,kernel=isolinux/vmlinuz,initrd=isolinux/initrd.img --channel tcp,host=127.0.0.1:40163,mode=connect,target_type=virtio,name=org.fedoraproject.anaconda.log.0

2.
3.

Actual results:

Traceback:

[Fri, 10 Jan 2020 14:09:58 virt-install 31418] DEBUG (cli:256)   File "/usr/share/virt-manager/virt-install", line 964, in <module>
    sys.exit(main())
  File "/usr/share/virt-manager/virt-install", line 958, in main
    start_install(guest, installer, options)
  File "/usr/share/virt-manager/virt-install", line 635, in start_install
    fail(e, do_exit=False)
  File "/usr/share/virt-manager/virtinst/cli.py", line 256, in fail
    logging.debug("".join(traceback.format_stack()))

[Fri, 10 Jan 2020 14:09:58 virt-install 31418] ERROR (cli:257) Invalid machine name
[Fri, 10 Jan 2020 14:09:58 virt-install 31418] DEBUG (cli:259).
Traceback (most recent call last):
  File "/usr/share/virt-manager/virt-install", line 608, in start_install
    transient=options.transient)
  File "/usr/share/virt-manager/virtinst/installer.py", line 415, in start_install
    doboot, transient)
  File "/usr/share/virt-manager/virtinst/installer.py", line 358, in _create_guest
    domain = self.conn.createXML(install_xml or final_xml, 0)
  File "/usr/lib64/python3.7/site-packages/libvirt.py", line 3743, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirt.libvirtError: Invalid machine name
Fri, 10 Jan 2020 14:09:58 virt-install 31418] DEBUG (cli:270) Domain installation does not appear to have been successful.
If it was, you can restart your domain by running:
  virsh --connect qemu:///system start kstest-network-device-default-httpks_(c9eed63e-981e-48ec-acdc-56b3f8c5f678)
otherwise, please restart your installation.


Expected results:


Additional info:

We don't hit this issue of updates "Fedora 29" cloud image (libvirt-daemon-4.7.0-5).

We were thinking it might be realated to length of the name, but for example a longer name 
"kstest-geolocation-off-by-default-with-ks_(d2a2444d-0e15-47e5-be08-56829d558294)" 
succeeds (see virt-install.log.1 attached in the next comment).