networkd: prevent networkd interference of weave network devices#22
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pothos merged 1 commit intoflatcar:flatcar-masterfrom Jul 31, 2020
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Thank you, we are still doing some more testing on our side (on AWS), we'll comment here if we find anything. |
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networkd: prevent networkd interference of weave network devices by cdemers
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Ran tests on Digital Ocean and Azure
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The special weave devices are now excluded from networkd to prevent interference. This pulls in flatcar/init#22
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Thank you for your contribution. This will be part of the next Alpha release. |
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This pulls in the new sub key for flatcar-install flatcar/init#25 and a networkd unit to exclude Weave interfaces from DHCP flatcar/init#22 and an update to two other networkd units which lacked a match section that is mandatory in future systemd versions flatcar/init#23
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Enable iSCSI netroot devices on Flatcar
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Prevent networkd interference of weave network devices
This change prevents systemd-networkd interference with
the Weave virtual interfaces
weave,datapathandvxlan-6784are all created by Weave. Documentation on theseinterfaces is available here:
This fixes DHCP issues introduced by networkd interference
reported by multiple users and mainly highlighted by this issue:
The issue doesn't seems to cause any significant impact on
performance, however it will cause Weave NPC to produce a
high volume of the following repetitive warning logs.
WARN: 2019/07/05 11:12:25.102451 UDP connection from 0.0.0.0:68 to 255.255.255.255:67 blocked by Weave NPC.How to use
Having the
weave.networkfile provided to networkd shouldbe enough.
Testing done
We have run many Flatcar instances in production with this configuration enabled, for at least one full week. The instances
are part of a many Kubernetes clusters using Weave as their network overlay.