When CNI ADD success, return all interfaces

[DrAuYueng]

Description

When CNI ADD success, return all interfaces created by the attachment, including any host-level interfaces.
Related references:https://github.com/containernetworking/cni/blob/main/SPEC.md#add-success

Resolves #10351.

Related issues/PRs

Todos

• Tests
• Documentation
• Release note

Release Note

Include all interfaces in CNI result

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[caseydavenport]

This LGTM, thanks!

[caseydavenport]

/sem-approve

[caseydavenport]

/sem-approve

[DrAuYueng]

I passed the test locally by executing cd path/calico/cni-plugin && make ut GINKGO_ARGS="-v tests", but CI failed. It's a bit strange. What information am I missing?

[DrAuYueng]

I think I know the reason. The key issue is cni version. The comparison is as follows:
0.3.1

2025-05-13 03:32:59.577 [INFO][12126] cni-plugin/plugin.go 414: Got result from IPAM plugin ContainerID="ff2b6b7e0b" IPAM result=&types040.Result{CNIVersion:"0.3.1", Interfaces:[]*types040.Interface(nil), IPs:[]*types040.IPConfig{(*types040.IPConfig)(0xc0001b4180)}, Routes:[]*types.Route(nil), DNS:types.DNS{Nameservers:[]string(nil), Domain:"", Search:[]string(nil), Options:[]string(nil)}}

0.2.0

2025-05-12 18:26:10.000 [INFO][11240] cni-plugin/plugin.go 414: Got result from IPAM plugin ContainerID="338cac2331" IPAM result=&types020.Result{CNIVersion:"0.2.0", IP4:(*types020.IPConfig)(0xc00007eae0), IP6:(*types020.IPConfig)(nil), DNS:types.DNS{Nameservers:[]string(nil), Domain:"", Search:[]string(nil), Options:[]string(nil)}}

The default version is 0.3.1, and the result is normal, but CI uses 0.2.0, which does not support interfaces.

[DrAuYueng]

I added version checking in the test cases, the spec for versions lower than 0.3.0 will be skipped.

[DrAuYueng]

@caseydavenport Need to re-trigger CI, thanks.

[caseydavenport]

/sem-approve

[caseydavenport]

Looks like you need to run make fix-changed to clean up import ordering.

[DrAuYueng]

I run make check-dirty and make test-cni-versions in my local environment, and the results look good.
I rebased the master branch and squashed the relevant commits.
@caseydavenport Please take a look. Thanks.

[caseydavenport]

/sem-approve