Create creates a new node api object with the given hostname and labels.

CreateOrUpdate tries to create a node api object or updates an already existing one.

IsSlaveAttributeLabel returns true iff the given label is derived from a slave attribute.

IsUpToDate returns true iff the node's slave labels match the given attributes labels.

SlaveAttributesToLabels converts slave attributes into string key/value labels.

Update updates an existing node api object with new labels.