none driver: Add warnings about --cpus, --memory, and --container-runtime

cmd/minikube/cmd/start.go

@@ -142,7 +142,6 @@ func init() {
 	if err := viper.BindPFlags(startCmd.Flags()); err != nil {
 		exit.WithError("unable to bind flags", err)
 	}
-
 }
 
 // initMinikubeFlags includes commandline flags for minikube.
@@ -296,7 +295,7 @@ func runStart(cmd *cobra.Command, args []string) {
 		glog.Errorf("Error autoSetOptions : %v", err)
 	}
 
-	validateFlags(driverName)
+	validateFlags(cmd, driverName)
 	validateUser(driverName)
 
 	// No need to install a driver in download-only mode
@@ -721,7 +720,7 @@ func validateUser(drvName string) {
 }
 
 // validateFlags validates the supplied flags against known bad combinations
-func validateFlags(drvName string) {
+func validateFlags(cmd *cobra.Command, drvName string) {
 	diskSizeMB := pkgutil.CalculateSizeInMB(viper.GetString(humanReadableDiskSize))
 	if diskSizeMB < pkgutil.CalculateSizeInMB(minimumDiskSize) && !viper.GetBool(force) {
 		exit.WithCodeT(exit.Config, "Requested disk size {{.requested_size}} is less than minimum of {{.minimum_size}}", out.V{"requested_size": diskSizeMB, "minimum_size": pkgutil.CalculateSizeInMB(minimumDiskSize)})
@@ -742,6 +741,18 @@ func validateFlags(drvName string) {
 			exit.WithCodeT(exit.Config, "The 'none' driver does not support multiple profiles: https://minikube.sigs.k8s.io/docs/reference/drivers/none/")
 		}
 
+		if cmd.Flags().Changed(cpus) {
+			out.WarningT("The 'none' driver does not respect the --cpus flag")
+		}
+		if cmd.Flags().Changed(memory) {
+			out.WarningT("The 'none' driver does not respect the --memory flag")
+		}
+
+		runtime := viper.GetString(containerRuntime)
+		if runtime != "docker" {
+			out.WarningT("Using the '{{.runtime}}' runtime with the 'none' driver is an untested configuration!", out.V{"runtime": runtime})
+		}
+
 		// Uses the gopsutil cpu package to count the number of physical cpu cores
 		ci, err := cpu.Counts(false)
 		if err != nil {

go.mod

@@ -21,14 +21,11 @@ require (
 	github.com/docker/machine v0.7.1-0.20190718054102-a555e4f7a8f5 // version is 0.7.1 to pin to a555e4f7a8f5
 	github.com/elazarl/goproxy v0.0.0-20190421051319-9d40249d3c2f
 	github.com/elazarl/goproxy/ext v0.0.0-20190421051319-9d40249d3c2f // indirect
-	github.com/ghodss/yaml v1.0.0 // indirect
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/google/btree v1.0.0 // indirect
 	github.com/google/go-cmp v0.3.0
 	github.com/gorilla/mux v1.7.1 // indirect
-	github.com/grpc-ecosystem/grpc-gateway v1.5.0 // indirect
 	github.com/hashicorp/errwrap v0.0.0-20141028054710-7554cd9344ce // indirect
 	github.com/hashicorp/go-getter v1.4.0
 	github.com/hashicorp/go-multierror v0.0.0-20160811015721-8c5f0ad93604 // indirect