Created attachment 1309931 [details]
vdsm log

Description of problem:
Failed to run VM with long name network or with special characters name network.

When trying to run VM with name that has special characters, for example: net1*

2017-08-07 09:51:57,227+0300 ERROR (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') The vm start process failed (vm:631)
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 562, in _startUnderlyingVm
    self._run()
  File "/usr/share/vdsm/virt/vm.py", line 2022, in _run
    self._connection.createXML(domxml, flags),
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 123, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 944, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3567, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirtError: Cannot get interface MTU on 'net1*': No such device
2017-08-07 09:51:57,234+0300 INFO  (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') Changed state to Down: Cannot get interface MTU on 'net1*': No such device (code=1) (vm:1221)
2017-08-07 09:51:57,234+0300 INFO  (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') Stopping connection (guestagent:430)

If the network name is long, for example: eeeeeeeeeeeeeeeee5%&@ we fail with:
2017-08-07 10:10:09,763+0300 ERROR (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') The vm start process failed (vm:631)
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/vm.py", line 562, in _startUnderlyingVm
    self._run()
  File "/usr/share/vdsm/virt/vm.py", line 2022, in _run
    self._connection.createXML(domxml, flags),
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 123, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 944, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3567, in createXML
    if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirtError: Network interface name 'eeeeeeeeeeeeeeeee5%&@' is too long: Numerical result out of range
2017-08-07 10:10:09,766+0300 INFO  (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') Changed state to Down: Network interface name 'eeeeeeeeeeeeeeeee5%&@' is too long: Numerical result out of r
ange (code=1) (vm:1221)
2017-08-07 10:10:09,766+0300 INFO  (vm/a7b9e633) [virt.vm] (vmId='a7b9e633-eeb6-4f49-b812-da8ce04f474e') Stopping connection (guestagent:430)

Version-Release number of selected component (if applicable):
vdsm-4.20.2-33.gite85019b.el7.centos
vdsm-4.19.26-1.el7ev

How reproducible:
100%

Steps to Reproduce:
1. Create network net1* and network eeeeeeeeeeeeeeeee5%&@
2. Attach both networks to the host
3. Try to run VM with one of those networks

Actual results:
Failed

Expected results:
Should work