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Add support for automatic bridge selection in HW offload mode #301

Merged
merged 1 commit into from
May 2, 2024
Merged

Add support for automatic bridge selection in HW offload mode #301

merged 1 commit into from
May 2, 2024

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ykulazhenkov
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Add support for automatic bridge selection in HW offload mode

If deviceID argument is passed it can be used for automatic bridge selection: VF deviceID > PF > Bond(Optional) > Bridge

What this PR does / why we need it:
This is required to optimize HW offloading use-case when Virtual Functions from multiple NICs on a host are exposed as a single resource.

Example:

We have two NICs on a host, and we want to expose all VFs from these NICs as a single resource.
To support HW offloading, each NIC should be attached to a separate OVS bridge.
Without changes from this PR, it is not possible to define NetworkAttachDefinition for OVS-cni, which will cover this use-case, because you need to explicitly specify the bridge name in the CNI config.

After changes from this PR, it is possible to define NetworkAttachDefinition without the bridge name and rely on the fact that ovs-cni will be able to automatically select the right OVS bridge (bridge to which NIC is attached) from the allocated Virtual Function (allocated by sriov device plugin, injected in deviceID field by multus)

Special notes for your reviewer:
Context is Software bridge management feature in sriov-network-operator

Release note:

Added support for automatic bridge selection for HW offloading use-case.
if `deviceID` argument is set, then it is possible to omit `bridge` argument. Bridge will be automatically selected by the CNI plugin by following
the chain: Virtual Function PCI address (provided in `deviceID` argument) > Physical Function > Bond interface 
(optional, if Physical Function is part of a bond interface) > ovs bridge

cc @zeeke @adrianchiris @SchSeba

@kubevirt-bot kubevirt-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. dco-signoff: yes Indicates the PR's author has DCO signed all their commits. labels Mar 1, 2024
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Hi @ykulazhenkov. Thanks for your PR.

I'm waiting for a k8snetworkplumbingwg member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@kubevirt-bot kubevirt-bot added the needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. label Mar 1, 2024
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phoracek commented Mar 5, 2024

/retest

e0ne
e0ne approved these changes Apr 8, 2024
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LGTM

@phoracek
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@ykulazhenkov hi. I believe that @SchSeba is planning to review this and help getting it merged once he's back at work.

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SchSeba commented Apr 25, 2024

Hi @ykulazhenkov can you please rebase I would like to see the github actions green on this one

@ykulazhenkov
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Hi @ykulazhenkov can you please rebase I would like to see the github actions green on this one

@SchSeba done

SchSeba
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thanks I like this image!

just one comment that I am not sure

pkg/sriov/sriov.go Show resolved Hide resolved
SchSeba
SchSeba reviewed May 1, 2024
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pkg/plugin/plugin.go Outdated
bridgeName, err = driver.FindBridgeByInterface(uplinkName)
if err != nil {
errList = append(errList,
fmt.Errorf("failed to get bridge name - failed to find bridge name by uplink name %s: %v", bridgeName, err))
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bridgeName -> uplinkName

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done

pkg/sriov/sriov.go Outdated Show resolved Hide resolved
@ykulazhenkov
Add support for automatic bridge selection in HW offload mode
58fb6d4 
If deviceID argument is passed it can be used for automatic
bridge selection: VF deviceID > PF > Bond(Optional) > Bridge

Signed-off-by: Yury Kulazhenkov <[email protected]>
@ykulazhenkov
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@SchSeba
Thanks for the review, Sebastian. I addressed your comments

SchSeba
SchSeba approved these changes May 2, 2024
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/lgtm
/approve

@kubevirt-bot kubevirt-bot added the lgtm Indicates that a PR is ready to be merged. label May 2, 2024
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: e0ne, SchSeba, ykulazhenkov

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@kubevirt-bot kubevirt-bot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label May 2, 2024
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SchSeba commented May 2, 2024

/retest

@kubevirt-bot kubevirt-bot merged commit 6f8174b into k8snetworkplumbingwg:main May 2, 2024
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@ykulazhenkov ykulazhenkov mentioned this pull request May 28, 2024
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@ykulazhenkov @kubevirt-bot @phoracek @SchSeba @e0ne