func GetZoneKey()

in node/topology/helpers.go [30:57]

• 18 lines of code
• 6 McCabe index (conditional complexity)

func GetZoneKey(node *v1.Node) string {
	labels := node.Labels
	if labels == nil {
		return ""
	}

	// TODO: "failure-domain.beta..." names are deprecated, but will
	// stick around a long time due to existing on old extant objects like PVs.
	// Maybe one day we can stop considering them (see #88493).
	zone, ok := labels[v1.LabelFailureDomainBetaZone]
	if !ok {
		zone, _ = labels[v1.LabelTopologyZone]
	}

	region, ok := labels[v1.LabelFailureDomainBetaRegion]
	if !ok {
		region, _ = labels[v1.LabelTopologyRegion]
	}

	if region == "" && zone == "" {
		return ""
	}

	// We include the null character just in case region or failureDomain has a colon
	// (We do assume there's no null characters in a region or failureDomain)
	// As a nice side-benefit, the null character is not printed by fmt.Print or glog
	return region + ":\x00:" + zone
}