[Bug 1235162] Re: Persistent net names via /etc/udev/rules.d/70-persistent-net.rules are ignored

[TJ]

Added to the kernel command-line: "udev.log-priority=7 udev.rdlog-
priority=7"

/var/log/dmesg was flooded and lost some of the early messages since I
didn't increase the log-buffer size but it did catch the systemd-udevd
logging especially related to the 'net' subsystem:

$ grep -B 2 -A 2 eth /var/log/dmesg
[   18.491927] EXT4-fs (dm-0): re-mounted. Opts: errors=remount-ro
[   19.011059] EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null)
[   19.251979] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   19.251985] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[   19.251990] IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready
[   19.251995] IPv6: ADDRCONF(NETDEV_UP): eth3: link is not ready
[   19.251999] IPv6: ADDRCONF(NETDEV_UP): eth4: link is not ready
[   19.823143] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null)
[   19.868611] systemd-udevd[1283]: starting version 204
--
[   21.828403] systemd-udevd[1348]: device 0x18d0530 filled with db file data
[   21.828823] systemd-udevd[1348]: device 0x1812440 has devpath '/devices/pci0000:00/0000:00:09.0/0000:02:00.0/0000:03:00.0/0000:04:00.1'
[   21.828884] systemd-udevd[1348]: NAME 'eth1' /etc/udev/rules.d/70-persistent-net.rules:11
[   21.828980] systemd-udevd[1348]: device 0x1812440 filled with db file data
[   21.828985] systemd-udevd[1348]: IMPORT builtin 'net_id' /lib/udev/rules.d/75-net-description.rules:6
--
[   22.028940] systemd-udevd[1348]: device 0x18096a0 has devpath '/devices/pci0000:00'
[   22.028980] systemd-udevd[1348]: IMPORT builtin 'hwdb' /lib/udev/rules.d/75-net-description.rules:12
[   22.029065] systemd-udevd[1348]: changing net interface name from 'eth2' to 'eth1'
[   22.029079] systemd-udevd[1348]: error changing net interface name eth2 to eth1: File exists
[   22.029294] systemd-udevd[1348]: created db file '/run/udev/data/n4' for '/devices/pci0000:00/0000:00:09.0/0000:02:00.0/0000:03:00.0/0000:04:00.1/net/eth2'
[   22.029316] systemd-udevd[1348]: passed -1 bytes to netlink monitor 0x18d1420
[   22.029321] systemd-udevd[1348]: seq 2011 processed with -17

And this time, for the first time, the original 'eth2' that is supposed
to become 'eth0' is actually 'eth1'. I attribute it to the udevd logging
causing timing differences affecting kernel uevent arrival order.

$ ifconfig -a | grep '^eth'
eth0      Link encap:Ethernet  HWaddr 00:15:17:8f:99:c1  
eth1      Link encap:Ethernet  HWaddr 00:25:22:75:e6:9e  
eth2      Link encap:Ethernet  HWaddr 00:15:17:8f:99:c0  
eth3      Link encap:Ethernet  HWaddr 00:15:17:8f:99:c3  
eth4      Link encap:Ethernet  HWaddr 00:15:17:8f:99:c2

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https://bugs.launchpad.net/bugs/1235162

Title:
  Persistent net names via /etc/udev/rules.d/70-persistent-net.rules are
  ignored

Status in “systemd” package in Ubuntu:
  New

Bug description:
  systemd-udev 204.

  Installing 13.10 amd64 on a multi-homed server. There are 5 ethernet
  interfaces, one on the mobo and four on a PCIe adapter.

  udev created "/etc/udev/rules.d/70-persistent-net.rules" and I later
  edited the NAME= assignments to match the device naming required.

  These rules are being ignored and I can't find any indication as to
  why.

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