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Re: [LUG] default ubuntu mirrors
- To: list@xxxxxxxxxxxxx
- Subject: Re: [LUG] default ubuntu mirrors
- From: comrade meowski <mr.meowski@xxxxxxxx>
- Date: Fri, 17 Apr 2020 20:58:24 +0100
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On 17/04/2020 20:31, comrade meowski wrote:
I've double checked at multiple sites but just for my own peace of mind
before I start bothering mirror maintainers I'd like some confirmation.
A local Arch VM is also timing out on mirrors so it's infrastructure
related somewhere out there.
Damn it, thank god I checked and kept digging before pestering mirror
admins... Found a show stopping bug deep in the network stack that
reaches out sideways into numerous other inter-related subsystems and am
already dying inside thinking about how to triage and fix this...
Certain hypervisor platforms + bridged virtual NICs + host with bonded
physical NICs + certain guest operating systems results in "double
MACcing" and obvious fatal breakage. I can flip effected VMs from
bridged to NAT mode and the problem goes away (it also makes the VMs
unusable for production so that's literally no good whatsoever).
Behold this horror:
ghost@failbot:~/SRC$ ssh archway.REDACTED 'cat /etc/live/dhcp.leases' |
head -n 3
1587237812 08:00:27:05:4a:66 10.10.10.114 zfsbot
ff:e2:34:3f:3e:00:02:00:00:ab:11:aa:b6:c9:f2:38:c7:c6:45
1587237553 08:00:27:9f:8b:25 10.10.10.120 discobiscuit
ff:e2:34:3f:3e:00:02:00:00:ab:11:53:b6:81:ac:6c:56:2f:dd
1587223151 08:00:27:a9:35:a4 10.10.10.67 archipelago
ff:27:a9:35:a4:00:01:00:01:22:1d:e3:12:08:00:27:a9:35:a4
A recent cross-operating system upgrade has done this somewhere and this
is not going to be a nice one to fix. To the internet!
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