Network interfaces renamed on every reboot

[Jame5]

Haven't run into this in the past, or in testing with proxmox on a 1GbE network. But in my production network each node has 2x 1GbE interfaces, and 2x 10GbE interfaces. This generates eth0, eth1, eth2, and eth3.

Most of the time, eth0&1 are 1GbE, and eth2&3 are 10GbE. Thus in my /etc/network/interfaces file I have:

auto bond0
iface bond0 inet manual
  slaves eth2 eth3

However, after setting up the pvecm cluster, and starting to do some failover testing, I notice that I have about a 1 in 3 chance of actually getting the correct interface assignments on reboot.

In the past this would have been handled by /etc/udev/rules.d/70-persistent-net.rules , but it seems this is no longer the case?

All I really want is to ensure that my network configuration survives a reboot and I can successfully reconnect to the system afterwards.

 

[manu]

Hi
Try putting
GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=1"

in /etc/default/grub

call 'update-grub' and reboot

this should give fix device names based on their position on the PCI bus

 

[Jame5]

That worked.

It looks like that flag goes ahead and generates the /etc/udev/rules.d/70-persistent-net.rules file.


*EDIT: Actually, I'm not so sure it did oddly. After reboot on my first node, I had a persistent-net-rules file. But on the others, it went to the new standard of naming by PCI location. I ended up deleting that 70-persistent-net.rules file and letting the first node also name them by PCI location. Since I have 3 identical nodes, that gives me a consistent configuration across all 3 nodes.

Thanks.

 

[UTamm]

I had the same Problem.

I use a PVE 5 Cluster on HP BladeSystem c7000 with 3 nodes (3 Blades).
One node is actual down.

Today i installed the updates (proxmox-ve 5.0-20 to 5.0-21, pve-kernel 4.10.17-3-pve to 4.10.17-21, .....).
After this i need to reboot the server.

On second node it worked fine.

But on third node i had no web-ui / no more network after reboot.

<ifconfig -a> showed me only 'lo' and 'vmbr0' - but no more 'eth0'

<dmesg> said that device 'bnx2x' .... had renamed 'eth0' to 'enp2s0f0'


first i tried to edit /etc/network/interfaces line bridge
- but this did not work


but adding
GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=1"

in /etc/default/grub

&
<update-grub> and reboot
helped me