in gce-containers-startup/runtime/runtime.go [80:87]
func generateRandomSuffix(length int, randEnv *rand.Rand) string {
var letters = []rune("abcdefghijklmnopqrstuvwxyz")
generated := make([]rune, length)
for i := range generated {
generated[i] = letters[randEnv.Intn(len(letters))]
}
return string(generated)
}