[systemd-devel] Upgraded multiple systems to systemd 249.3 and all had eth1 not started / configured

[Amish]

On 18/08/21 12:24 pm, Amish wrote:
>
> Hello
>
> Further to my previous email:
>
> I see that there is already an *extremely similar issue* reported on 
> July 12, 2021 and it has been fixed.
>
> https://github.com/systemd/systemd/issues/20203
>
> But I do not know if this fix exists in systemd v249.3 (Arch Linux)
>
> If it exists that means that fix is breaking my system.
> And if it does not exist that means, I can expect it to fix my issue.
>

systemd v249.4 seems to have fixed the issue. (Arch Linux)

Regards

Amish


> Regards,
>
> Amish.
>
> On 18/08/21 11:42 am, Amish wrote:
>>
>> Hello,
>>
>> Thank you for your reply.
>>
>> I can understand that there can be race.
>>
>> *But when I check logs, there is no race happening*.
>>
>> *Let us see and analyze the logs.*
>>
>> Stage 1:
>> System boots, and kernel assigns eth0, eth1 and eth2 as interface names.
>>
>> Aug 18 09:17:13 kk kernel: e1000e 0000:00:1f.6 eth0: (PCI 
>> Express:2.5GT/s:Width x1) e0:d5:5e:8d:7f:2f
>> Aug 18 09:17:13 kk kernel: e1000e 0000:00:1f.6 eth0: Intel(R) 
>> PRO/1000 Network Connection
>> Aug 18 09:17:13 kk kernel: e1000e 0000:00:1f.6 eth0: MAC: 13, PHY: 
>> 12, PBA No: FFFFFF-0FF
>> Aug 18 09:17:13 kk kernel: 8139too 0000:04:00.0 eth1: RealTek RTL8139 
>> at 0x000000000e8fc9bb, 00:e0:4d:05:ee:a2, IRQ 19
>> Aug 18 09:17:13 kk kernel: r8169 0000:02:00.0 eth2: RTL8168e/8111e, 
>> 50:3e:aa:05:2b:ca, XID 2c2, IRQ 129
>> Aug 18 09:17:13 kk kernel: r8169 0000:02:00.0 eth2: jumbo features 
>> [frames: 9194 bytes, tx checksumming: ko]
>>
>> Stage 2:
>> Now udev rules are triggered and the interfaces are renamed to 
>> tmpeth0, tmpeth2 and tmpeth1.
>>
>> Aug 18 09:17:13 kk kernel: 8139too 0000:04:00.0 tmpeth2: renamed from 
>> eth1
>> Aug 18 09:17:13 kk kernel: e1000e 0000:00:1f.6 tmpeth0: renamed from eth0
>> Aug 18 09:17:13 kk kernel: r8169 0000:02:00.0 tmpeth1: renamed from eth2
>>
>> Stage 3:
>> Now my script is called and it renames interfaces to eth0, eth2 and eth1.
>>
>> Aug 18 09:17:13 kk kernel: e1000e 0000:00:1f.6 eth0: renamed from tmpeth0
>> Aug 18 09:17:14 kk kernel: r8169 0000:02:00.0 eth1: renamed from tmpeth1
>> Aug 18 09:17:14 kk kernel: 8139too 0000:04:00.0 eth2: renamed from 
>> tmpeth2
>>
>> Effectively original interface eth1 and eth2 are swapped. While eth0 
>> remains eth0.
>>
>> All these happened before systemd-networkd started and interface 
>> renaming was over by 9:17:14.
>>
>> Stage 4:
>> Now systemd-networkd starts, 2 seconds after all interface have been 
>> assigned their final names.
>>
>> Aug 18 09:17:16 kk systemd[1]: Starting Network Configuration...
>> Aug 18 09:17:17 kk systemd-networkd[426]: lo: Link UP
>> Aug 18 09:17:17 kk systemd-networkd[426]: lo: Gained carrier
>> Aug 18 09:17:17 kk systemd-networkd[426]: Enumeration completed
>> Aug 18 09:17:17 kk systemd[1]: Started Network Configuration.
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth2: Interface name change 
>> detected, renamed to eth1.
>> Aug 18 09:17:17 kk systemd-networkd[426]: Could not process link 
>> message: File exists
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth1: Failed
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth1: Interface name change 
>> detected, renamed to eth2.
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth1: Interface name change 
>> detected, renamed to tmpeth2.
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth0: Interface name change 
>> detected, renamed to tmpeth0.
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth2: Interface name change 
>> detected, renamed to tmpeth1.
>> Aug 18 09:17:17 kk systemd-networkd[426]: tmpeth0: Interface name 
>> change detected, renamed to eth0.
>> Aug 18 09:17:17 kk systemd-networkd[426]: tmpeth1: Interface name 
>> change detected, renamed to eth1.
>> Aug 18 09:17:17 kk systemd-networkd[426]: tmpeth2: Interface name 
>> change detected, renamed to eth2.
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth1: Link UP
>> Aug 18 09:17:17 kk systemd-networkd[426]: eth0: Link UP
>> Aug 18 09:17:20 kk systemd-networkd[426]: eth0: Gained carrier
>>
>> This is when eth0 and eth1 interfaces are up and configured by 
>> systemd-networkd but eth2 is down and not configured.
>>
>> *None of the .network configuration files match by interface names. 
>> They all match just by MAC address.
>>
>> *# sample .network file.
>>
>> [Match]
>> MACAddress=e0:d5:5e:8d:7f:2f
>> Type=ether
>>
>> [Network]
>> IgnoreCarrierLoss=yes
>> LinkLocalAddressing=no
>> IPv6AcceptRA=no
>> ConfigureWithoutCarrier=true
>> Address=192.168.25.2/24
>> *
>> *
>>
>> Above error message "eth1: failed", was not showing earlier version 
>> of systemd.
>>
>> So recent version of systemd-networkd is doing something different 
>> and this is where something is going wrong.
>>
>> Stage 5: (my workaround for this issue)
>> I wrote a new service file which restarts systemd-networkd after 
>> waiting for 10 seconds.
>>
>> Aug 18 09:17:27 kk systemd[1]: Stopping Network Configuration...
>> Aug 18 09:17:27 kk systemd[1]: systemd-networkd.service: Deactivated 
>> successfully.
>> Aug 18 09:17:27 kk systemd[1]: Stopped Network Configuration.
>> Aug 18 09:17:27 kk systemd[1]: Starting Network Configuration...
>> Aug 18 09:17:27 kk systemd-networkd[579]: eth1: Link UP
>> Aug 18 09:17:27 kk systemd-networkd[579]: eth0: Link UP
>> Aug 18 09:17:27 kk systemd-networkd[579]: eth0: Gained carrier
>> Aug 18 09:17:27 kk systemd-networkd[579]: lo: Link UP
>> Aug 18 09:17:27 kk systemd-networkd[579]: lo: Gained carrier
>> Aug 18 09:17:27 kk systemd-networkd[579]: Enumeration completed
>> Aug 18 09:17:27 kk systemd[1]: Started Network Configuration.
>> Aug 18 09:17:27 kk systemd-networkd[579]: eth2: Link UP
>> Aug 18 09:17:27 kk systemd-networkd[579]: eth2: Gained carrier
>>
>> All interfaces are now up and running as expected.
>>
>> Please check as I do not believe that this issue is causing any race 
>> but to me it looks like some logical change in systemd-networkd which 
>> is causing the issue.
>>
>> Thank you and regards,
>>
>> Amish
>>
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