Re: [Devil-linux-develop] Potential bug - save-config includes "/etc/udev/rules.d/70-persistent-net.rules"

[Heiko Z. <he...@zu...>]

Quoting Steve Ralph <Ste...@sa...>: 

> Hi there, 
>
> I have been working to port some internal configuration scripts to DL-1.4-RC3/486 and have installed to a USB key. This allows me to boot from multiple different machines and continue work where I left off. 
>
> When I boot from the original install and list the network interfaces (either ifconfig or ip addr show), all seems OK. Once I run save-config, and then boot from different hardware, I have an issue around the assignment of the interface names. 
>
> After some investigation, this seems to be because the file "/etc/udev/rules.d/70-persistent-net.rules " is included in the tarball created by save-config. This file links the mac-address to the device name (eg, 00:08:02:01:02:03 is named eth0). 
>
> When this file already exists (eg, after save-config has been run), and the usb-key boots on different hardware, udev says eth0 is already assigned 
> because the mac address of the previous machine is linked to eth0 in 70-persistent-net.rules (even if the listed mac-address is nowhere to be seen on this hardware), and assigns the new mac-address to the next available device, eg, eth1.  
>
> If I save-config again the problem is exacerbated! On the second and subsequent hardware, interfaces are assigned after the devices allocated in 70-persistent-net.rules, but any statically configured addresses are assigned to the original network devices. 
>
> EG: 
>         1st machine 
>                 IF=eth0 MAC=00:08:02:01:02:03 IP=10.1.1.1/24 
>                 IF=eth1 MAC=00:08:02:01:02:04 IP=10.1.2.1/24 
>                 IF=eth2 MAC=00:08:02:01:02:05 IP=10.1.3.1/24 
>
>         2nd machine 
>                 IF=eth0 MAC=00:08:02:01:02:06  
>                 IF=eth1 MAC=00:08:02:01:02:07  
>                 IF=eth2 MAC=00:08:02:01:02:08  
>
>         When using the saved-config from the first machine on the second machine 
>                 IF=eth0 MAC=00:08:02:01:02:03 IP=10.1.1.1/24     Interface Not available as MAC address not found! 
>                 IF=eth1 MAC=00:08:02:01:02:04 IP=10.1.2.1/24     Interface Not available as MAC address not found! 
>                 IF=eth2 MAC=00:08:02:01:02:05 IP=10.1.3.1/24     Interface Not available as MAC address not found! 
>                 IF=eth3 MAC=00:08:02:01:02:06 IP=Unassigned     Interface available as MAC address found but NO IP Address assigned 
>                 IF=eth4 MAC=00:08:02:01:02:07 IP=Unassigned     Interface available as MAC address found but NO IP Address assigned 
>                 IF=eth5 MAC=00:08:02:01:02:08 IP=Unassigned     Interface available as MAC address found but NO IP Address assigned 
>
> This issue could also occur if a pre-saved config file was installed on new kit as part of a hardware only upgrade. 
>
> I suggest a fix would be to exclude the file "/etc/udev/rules.d/70-persistent-net.rules" from the tar created with save-config allowing this file to be dynamically created at boot up like on the initial boot. 
>
> Before I log a call on mantis I would appreciate a sanity check first, to confirm that I haven't missed anything obvious. 
>
> Additionally, although I have had no issues with the CD assignment, should "/etc/udev/rules.d/70-persistent-cd.rules" file also be excluded from the save-config?

 During an upgrade to a newer DL version we automatically de-select those files. 

On one hand I'm a bit reluctant to remove them in save-config, but then on the other hand I never "upgrade" them either. 

Is anybody actually relying on these files?

-- 

Regards
  Heiko Zuerker
http://www.devil-linux.org

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