FilterNodes takes a string filter to return a filtered list of nodes.

FilterNodesByRole returns a stripped list of nodes which do match the given role.

GenerateRandomString thanks to https://stackoverflow.com/a/31832326/6450189 GenerateRandomString is used to generate a random string that is used as a cluster token.

GetConfigDirOrCreate will return the base path of the k3d config directory or create it if it doesn't exist yet k3d's config directory will be $HOME/.k3d (Unix).

GetFakeMeminfoPathForName returns a path to (existent or not) fake meminfo file for a given node/container name.

GetFreePort tries to fetch an open port from the OS-Kernel.

GetNodeFakerDirOrCreate creates or gets a hidden folder in k3d home dir to keep container(node)-specific fake files in it.

MakeFakeEdac creates an empty edac folder to force cadvisor to use meminfo even for ECC memory.

MakeFakeMeminfo creates a fake meminfo file to be mounted and provide a specific RAM capacity.

MapSubexpNames maps regex capturing group names to corresponding matches.

ParseRegistryRef returns a registry struct parsed from a simplified definition string.

SplitLabelKeyValue separates the label key from the label value (if any).