Comment # 5 on bug 1170255 from Thomas Blume

(In reply to Alberto Planas Dominguez from comment #4)
> (In reply to Thomas Blume from comment #1)
> cted "ifup ens3" and "ifup ens4".
> > 
> > It seems that the boot parameters are missing ifname= settings, hence the
> > kernel names are used.
> 
> Disabling udev names on tumbleweed (net.ifnames=0) works, but we should be
> able to use consistent naming on TW too.
> 
> Also tested an explicit net.ifnames=1, and as expected shows the same bug
> (device name

I could reproduce the issue on a current tumbleweed when using the kiwi
parameters to build the initrd:

/usr/bin/dracut --verbose --no-hostonly --no-hostonly-cmdline --omit "
multipath " /boot/initrd_kiwi_install.xz

The debug log shows that the udev device processing is triggered before the
interface gets renamed:

-->
[   18.926278] localhost kernel: virtio_net virtio0 ens3: renamed from eth0
[...]
--<

versus:

-->
[   18.829288] localhost systemd-udevd[479]: eth0: Processing device
(SEQNUM=2047, ACTION=add)
[   18.829303] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/75-net-description.rules:6 Importing properties from
results of builtin command 'net_id'
[   18.829320] localhost systemd-udevd[479]: Using default interface naming
scheme 'v245'.
[   18.829335] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/75-net-description.rules:12 Importing properties from
results of builtin command 'hwdb --subsystem=pci'
[   18.829350] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/75-net-description.rules:12 Failed to run builtin 'hwdb
--subsystem=pci': Invalid argument
[   18.829364] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/80-net-setup-link.rules:5 Importing properties from
results of builtin command 'path_id'
[   18.829379] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/80-net-setup-link.rules:9 Importing properties from
results of builtin command 'net_setup_link'
[   18.829395] localhost systemd-udevd[479]: eth0: Config file
/usr/lib/systemd/network/99-default.link is applied
[   18.829410] localhost systemd-udevd[479]: ethtool: autonegotiation is unset
or enabled, the speed and duplex are not writable.
[   18.829425] localhost systemd-udevd[479]: eth0: Failed to query
name_assign_type: Invalid argument
[   18.829440] localhost systemd-udevd[479]: eth0: Policy *slot* yields "ens3".
[   18.829456] localhost systemd-udevd[479]: eth0: Device has
addr_assign_type=0
[   18.829471] localhost systemd-udevd[479]: eth0: MAC on the device already
matches policy *persistent*
[   18.829485] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/80-net-setup-link.rules:11 NAME 'ens3'
[   18.829500] localhost systemd-udevd[479]: eth0:
/etc/udev/rules.d/91-default-net.rules:1 RUN '/sbin/initqueue --name
ifup-$env{INTERFACE} --unique --onetime /sbin/ifup $env{INTERFACE}'
[   18.829515] localhost systemd-udevd[479]: eth0:
/usr/lib/udev/rules.d/99-systemd.rules:62 RUN '/usr/lib/systemd/systemd-sysctl
--prefix=/net/ipv4/conf/$name --prefix=/net/ipv4/neigh/$name
--prefix=/net/ipv6/conf/$name --prefix=/net/ipv6/neigh/$name'
[   18.829532] localhost systemd-udevd[479]: eth0: Network interface 2 is
renamed from 'eth0' to 'ens3'
[   18.829547] localhost systemd-udevd[479]: eth0: sd-device: Created db file
'/run/udev/data/n2' for '/devices/pci0000:00/0000:00:03.0/virtio0/net/ens3'
[   18.829562] localhost systemd-udevd[479]: eth0: Running command
"/sbin/initqueue --name ifup-eth0 --unique --onetime /sbin/ifup eth0"
[   18.829577] localhost systemd-udevd[479]: eth0: Starting '/sbin/initqueue
--name ifup-eth0 --unique --onetime /sbin/ifup eth0'
--<

So, we have a race condition here.
Investigating why....