GetHostname returns OS's hostname if 'hostnameOverride' is empty; otherwise, it returns 'hostnameOverride'.

GetNodeCondition extracts the provided condition from the given status and returns that.

ParseNodeIPAnnotation parses the `alpha.kubernetes.io/provided-node-ip` annotation, which can be either a single IP address or a comma-separated pair of IP addresses.

ParseNodeIPArgument parses kubelet's --node-ip argument.

PatchNodeCIDRs patches the specified node.CIDR=cidrs[0] and node.CIDRs to the given value.

PatchNodeStatus patches node status.

SetNodeCondition updates specific node condition with patch operation.