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dockercompat: key inspect Networks by real CNI network name - #5164
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AkihiroSuda merged 1 commit intoSep 8, 2026
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nerdctl inspect keyed NetworkSettings.Networks by a synthesized "unknown-<iface>" name (e.g. "unknown-eth0") instead of the network the endpoint actually belongs to. go-cni names the i-th attached network's interface "eth<i>" in the order the networks were configured, and that ordered list is recorded in the nerdctl/networks spec annotation. Resolve each interface back to its network name through that list, falling back to the previous "unknown-<iface>" key when there is no match (host networking, an interface not created by CNI, or a missing networks annotation). Fixes containerd#2999 Signed-off-by: Saleh <root@lr0.org>
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nerdctl inspectcurrently shows a container's networks asunknown-eth0instead of the network nameIt comes from
networkSettingsFromNativein pkg/inspecttypes/dockercompat: the map key is built from the interface name with a hardcodedunknown-prefix, and it does not look at which network the interface belongs to. (There was already a// TODO: set CNI name when possiblesitting there).go-cni names the interfaces
eth0,eth1, ... in the same order the networks were attached, and nerdctl keeps that ordered list in thenerdctl/networksannotation. I read the list from the annotation and mapeth<i>back tonetworks[i].If an interface doesn't fit that pattern, host networking, something not set up by CNI, or an older container with no annotation, it keeps the old
unknown-<iface>key, so those cases are unchanged.Added single, and multi-network cases to
TestNetworkSettingsFromNative; the existing cases are untouched.Fixes #2999