kubernetes/test/e2e/cloud/gcp/common/upgrade_context.go

var upgradeTarget …

var upgradeImage …

// GetUpgradeContext return UpgradeContext for GCP provider.
func GetUpgradeContext(c discovery.DiscoveryInterface) (*upgrades.UpgradeContext, error) { … }

// realVersion turns a version constants into a version string deployable on
// GKE.  See hack/get-build.sh for more information.
func realVersion(s string) (string, error) { … }