kubernetes/staging/src/k8s.io/cloud-provider/node/helpers/address.go

// AddToNodeAddresses appends the NodeAddresses to the passed-by-pointer slice,
// only if they do not already exist
func AddToNodeAddresses(addresses *[]v1.NodeAddress, addAddresses ...v1.NodeAddress) { … }

// GetNodeAddressesFromNodeIPLegacy filters node addresses to prefer a specific node IP or
// address family. This function is used only with legacy cloud providers.
//
// If nodeIP is either '0.0.0.0' or '::' it is taken to represent any address of
// that address family: IPv4 or IPv6. i.e. if nodeIP is '0.0.0.0' we will return
// node addresses sorted such that all IPv4 addresses are listed before IPv6
// addresses.
//
// If nodeIP is a specific IP, either IPv4 or IPv6, we will return node
// addresses filtered such that:
//   - Any address matching nodeIP will be listed first.
//   - If nodeIP matches an address of a particular type (internal or external),
//     that will be the *only* address of that type returned.
//   - All remaining addresses are listed after.
func GetNodeAddressesFromNodeIPLegacy(nodeIP net.IP, cloudNodeAddresses []v1.NodeAddress) ([]v1.NodeAddress, error) { … }

// GetNodeAddressesFromNodeIP filters the provided list of nodeAddresses to match the
// providedNodeIP from the Node annotation (which is assumed to be non-empty). This is
// used for external cloud providers.
//
// It will return node addresses filtered such that:
//   - Any address matching nodeIP will be listed first.
//   - If nodeIP matches an address of a particular type (internal or external),
//     that will be the *only* address of that type returned.
//   - All remaining addresses are listed after.
//
// (This does not have the same behavior with `0.0.0.0` and `::` as
// GetNodeAddressesFromNodeIPLegacy, because that case never occurs for external cloud
// providers, because kubelet does not set the `provided-node-ip` annotation in that
// case.)
func GetNodeAddressesFromNodeIP(providedNodeIP string, cloudNodeAddresses []v1.NodeAddress) ([]v1.NodeAddress, error) { … }