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The node.status.addresses logic grew organically and with weird semantics, this commit try to document existing semantics when the kubelet uses an external cloud provider and recover the same behavior existing pre-1.29. The node.status.addresses can be populated by the kubelet at startup or delegated to the external cloud provider. If the --node-ip flag is set to an IP in the node, the kubelet will add an annotation to the Node object that will be respected by the external cloud providers, no new IP addresses will be added for the same address type. If the IP set in the --node-ip flag is `0.0.0.0` or `::`, the kubelet will initialize the node with the default address of the corresponding IP family of the unspecified address, and the cloud-provider will override it later.