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Fix issue preventing lowering of PF's MTU #700

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merged 1 commit into from
Jun 6, 2024
Merged

Fix issue preventing lowering of PF's MTU #700

merged 1 commit into from
Jun 6, 2024

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almaslennikov
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@almaslennikov almaslennikov commented May 17, 2024 •
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When the MTU set in the SRIOV Network Node Policy is lower than the actual MTU of the PF, it cannot be changed due to a condition in question. This triggers the reconcile loop for the Node state indefinitely, preventing the configuration from completing.

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Thanks for your PR,
To run vendors CIs use one of:

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coveralls commented May 17, 2024 •
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Pull Request Test Coverage Report for Build 9363135127

Details

  • 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
  • No unchanged relevant lines lost coverage.
  • Overall coverage increased (+0.05%) to 39.701%
Totals Coverage Status
Change from base Build 9212771639: 0.05%
Covered Lines: 5181
Relevant Lines: 13050
💛 - Coveralls

@almaslennikov
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almaslennikov commented May 17, 2024 •
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I see that there was a reason for never allowing to lower the PF's MTU: #489

@SchSeba @adrianchiris @bn222 What's your take on this?

I see two options here: either allow to lower the MTU of the PF or also update the condition here with regards to how we decide if sriov device should get updated

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Thanks @almaslennikov. Another way to hit this issue is when the user manually increases the mtu after having configured a policy with a lower mtu. We have a test (should reconcile managed VF if status changes) in test_sriov_operator.go for the opposite case (manually decreasing mtu).

I think we should go for the second option, aligning NeedToUpdateSriov with which is actually being applied in order to avoid the loop. Please consider adding a test for this scenario as well.

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IMO we should update NeedToUpdateSriov so we support the use-case of a PF having a different (higher) MTU than VF as requested in spec.

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SchSeba commented May 19, 2024 •
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agree if the MTU on the PF is higher the NeedToUpdateSriov should return false

@almaslennikov please implement a functional test to cover this case I will review this PR.
another test as requested by @mlguerrero12 is to apply a policy lower the MTU on the host and see that we return the MTU back to be the policy MTU

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Thanks for your PR,
To run vendors CIs use one of:

  • /test-all: To run all tests for all vendors.
  • /test-e2e-all: To run all E2E tests for all vendors.
  • /test-e2e-nvidia-all: To run all E2E tests for NVIDIA vendor.

To skip the vendors CIs use one of:

  • /skip-all: To skip all tests for all vendors.
  • /skip-e2e-all: To skip all E2E tests for all vendors.
  • /skip-e2e-nvidia-all: To skip all E2E tests for NVIDIA vendor.
    Best regards.

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/test-e2e-all

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SchSeba commented May 27, 2024

Hi @almaslennikov please check the unit-tests

@SchSeba SchSeba mentioned this pull request May 27, 2024
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@almaslennikov
Fix issue with infinite reconciling higher MTU
c2c7817 
When the MTU set in the SRIOV Network Node Policy is lower than the
actual MTU of the PF, it triggers the reconcile loop for the Node state
indefinitely, preventing the configuration from completing.

Signed-off-by: amaslennikov <amaslennikov@nvidia.com>
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github-actions bot commented Jun 4, 2024

Thanks for your PR,
To run vendors CIs use one of:

  • /test-all: To run all tests for all vendors.
  • /test-e2e-all: To run all E2E tests for all vendors.
  • /test-e2e-nvidia-all: To run all E2E tests for NVIDIA vendor.

To skip the vendors CIs use one of:

  • /skip-all: To skip all tests for all vendors.
  • /skip-e2e-all: To skip all E2E tests for all vendors.
  • /skip-e2e-nvidia-all: To skip all E2E tests for NVIDIA vendor.
    Best regards.

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/test-e2e-all

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@e0ne
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e0ne commented Jun 5, 2024

/test-e2e-all

adrianchiris
adrianchiris reviewed Jun 5, 2024
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test/conformance/tests/test_sriov_operator.go
nodeState, err := clients.SriovNetworkNodeStates(operatorNamespace).Get(context.Background(), node, metav1.GetOptions{})
Expect(err).ToNot(HaveOccurred())
return nodeState.Status.Interfaces
}, 3*time.Minute, 15*time.Second).Should(ContainElement(MatchFields(
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This whole flow extends the this test by quite a bit.

@zeeke ? thoughts ? do we want this back and forth of the MTU in e2e tests

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I am fine with it for now if we see that it's unstable for some reason we can revisit this

adrianchiris
adrianchiris approved these changes Jun 5, 2024
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LGTM, thx @almaslennikov

e0ne
e0ne approved these changes Jun 5, 2024
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LGTM.

Nvidia e2e test CI seems to be broken now

@mlguerrero12
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LGTM

SchSeba
SchSeba approved these changes Jun 6, 2024
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test/conformance/tests/test_sriov_operator.go
nodeState, err := clients.SriovNetworkNodeStates(operatorNamespace).Get(context.Background(), node, metav1.GetOptions{})
Expect(err).ToNot(HaveOccurred())
return nodeState.Status.Interfaces
}, 3*time.Minute, 15*time.Second).Should(ContainElement(MatchFields(
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I am fine with it for now if we see that it's unstable for some reason we can revisit this

@SchSeba SchSeba merged commit a767d33 into k8snetworkplumbingwg:master Jun 6, 2024
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This was referenced Jul 5, 2024
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@e0ne e0ne e0ne approved these changes

@SchSeba SchSeba SchSeba approved these changes

@adrianchiris adrianchiris adrianchiris approved these changes

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@almaslennikov @coveralls @mlguerrero12 @adrianchiris @SchSeba @e0ne