[Expired for cloud-init because there has been no activity for 60 days.]
** Changed in: cloud-init
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1871326
Title:
Duplicate mac on infiniband card, when not correct (v19.4-33)
Status in cloud-init:
Expired
Bug description:
Hello,
I think there is a bug in version 19.4-33-gbb4131a2-0ubuntu1~18.04.1,
because with version 18.2-14-g6d48d265-0ubuntu1 it works correctly.
In case you need to improve this check in your next update.
Steps I've followed:
- I set up a virtual machine in openstack with Ubuntu 18.04 and with the
associated NVIDIA (PF) and Mellanox (VF) PCI
- I installed Mellanox Driver (5.0-1)
- All right so far
- I created a new image in glance and raised a new machine with this new
image.
Problem:
- It doesn't assign the ip to the new machine, and thus doesn't start the
network
- Looking at the logs I found that cloud-init gives a problem:
RuntimeError: duplicate mac found! both 'lo' and 'ib0' have mac
'00:00:00:00:00'
Solution:
After a lot of looking I think there's a bug in the new version of cloud-init
in how it checks MACs (version 19.4-33-gbb4131a2-0ubuntu1~18.04.1)
With the previous version it works correctly (18.2-14-g6d48d265-0ubuntu1)
Opinion:
Infiniband MACs are much longer than ethernet MACs:
MAC lo: 00:00:00:00:00
MAC eth0: fa:16:3e:20:9e:61
MAC infiniband ib0: 20:00:05:87:fe:80:00:00:00:00:00:00:00:00:00:00:00:00
I believe that Cloud-init should identify only a part of the MAC of an
infiniband card and not the whole MAC.
Comparing it to the others results in the error that the MAC is duplicated
and this error leads to incorrect initialization of all network cards.
I think you can correct this error by comparing the entire MAC and not just a
single piece.
Greetings
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