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Fix flaky e2e test due to mac address re-used #198

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LionelJouin
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What this PR does / why we need it:

The mac addresses used during the e2e tests are now generated during the tests instead of being hard-coded.
The hard-coded mac address was causing flaky tests probably due to the kernel refusing a new macvlan interface to be created with an already existing mac address.

Which issue(s) this PR fixes:
Fixes #194 (1.)

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@LionelJouin LionelJouin requested a review from maiqueb as a code owner January 8, 2024 16:46
@maiqueb
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maiqueb commented Jan 16, 2024

Darn, need to understand this new namespace error first.

Sorry for holding this PR hostage ...

@LionelJouin
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No problem, do you have a way to reproduce it? It's the first time I saw it before

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maiqueb commented Jan 16, 2024

No problem, do you have a way to reproduce it? It's the first time I saw it before

Not yet, I just saw this on a couple PRs in CI.

@LionelJouin
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I tried Kind v0.12.0 as used in the CI, but I could not even create a cluster for some reason. Probably it should be updated (not sure if it's related): https://github.com/k8snetworkplumbingwg/multus-cni/blob/a70da3556a41a04386e1f8049c2ea18f5feebc61/e2e/get_tools.sh#L8

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Also, merging this k8snetworkplumbingwg/multus-cni#1208 might fix the first issue (timed out waiting for the condition) as the CI uses that file (e2e/templates/multus-daemonset-thick.yml.j2) to deploy Multus.

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maiqueb commented Jan 22, 2024

Could you rebase ? @LionelJouin

The mac addresses used during the e2e tests are now generated during the
tests instead of being hard-coded.
The hard-coded mac address was causing flacky tests probably due to the
kernel refusing a new macvlan interface to be created with an already
existing mac address.
@LionelJouin LionelJouin force-pushed the fix-flacky-e2e-test-mac branch from 6cc79e3 to a80d03e Compare January 22, 2024 12:24
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Done

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Thanks for these changes.

@maiqueb maiqueb merged commit 4e491f1 into k8snetworkplumbingwg:main Jan 22, 2024
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[BUG] Failing e2e tests
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