Build images on the primary control plane

cmd/minikube/cmd/image.go

@@ -35,6 +35,10 @@ import (
 	docker "k8s.io/minikube/third_party/go-dockerclient"
 )
 
+var (
+	allNodes bool
+)
+
 // imageCmd represents the image command
 var imageCmd = &cobra.Command{
 	Use:   "image COMMAND",
@@ -217,7 +221,7 @@ var buildImageCmd = &cobra.Command{
 				// Otherwise, assume it's a tar
 			}
 		}
-		if err := machine.BuildImage(img, dockerFile, tag, push, buildEnv, buildOpt, []*config.Profile{profile}); err != nil {
+		if err := machine.BuildImage(img, dockerFile, tag, push, buildEnv, buildOpt, []*config.Profile{profile}, allNodes, nodeName); err != nil {
 			exit.Error(reason.GuestImageBuild, "Failed to build image", err)
 		}
 		if tmp != "" {
@@ -257,6 +261,8 @@ func init() {
 	buildImageCmd.Flags().StringVarP(&dockerFile, "file", "f", "", "Path to the Dockerfile to use (optional)")
 	buildImageCmd.Flags().StringArrayVar(&buildEnv, "build-env", nil, "Environment variables to pass to the build. (format: key=value)")
 	buildImageCmd.Flags().StringArrayVar(&buildOpt, "build-opt", nil, "Specify arbitrary flags to pass to the build. (format: key=value)")
+	buildImageCmd.Flags().StringVarP(&nodeName, "node", "n", "", "The node to build on. Defaults to the primary control plane.")
+	buildImageCmd.Flags().BoolVarP(&allNodes, "all", "", false, "Build image on all nodes.")
 	imageCmd.AddCommand(buildImageCmd)
 	imageCmd.AddCommand(listImageCmd)
 }

pkg/minikube/machine/build_images.go

@@ -40,7 +40,7 @@ import (
 var buildRoot = path.Join(vmpath.GuestPersistentDir, "build")
 
 // BuildImage builds image to all profiles
-func BuildImage(path string, file string, tag string, push bool, env []string, opt []string, profiles []*config.Profile) error {
+func BuildImage(path string, file string, tag string, push bool, env []string, opt []string, profiles []*config.Profile, allNodes bool, nodeName string) error {
 	api, err := NewAPIClient()
 	if err != nil {
 		return errors.Wrap(err, "api")
@@ -70,9 +70,23 @@ func BuildImage(path string, file string, tag string, push bool, env []string, o
 			continue
 		}
 
+		cp, err := config.PrimaryControlPlane(p.Config)
+		if err != nil {
+			return err
+		}
+
 		for _, n := range c.Nodes {
 			m := config.MachineName(*c, n)
 
+			if !allNodes {
+				// build images on the primary control plane node by default
+				if nodeName == "" && n != cp {
+					continue
+				} else if nodeName != n.Name && nodeName != m {
+					continue
+				}
+			}
+
 			status, err := Status(api, m)
 			if err != nil {
 				klog.Warningf("error getting status for %s: %v", m, err)

site/content/en/docs/commands/image.md

@@ -56,9 +56,11 @@ minikube image build .
 ### Options
 
 ```
+      --all                     Build image on all nodes.
       --build-env stringArray   Environment variables to pass to the build. (format: key=value)
       --build-opt stringArray   Specify arbitrary flags to pass to the build. (format: key=value)
   -f, --file string             Path to the Dockerfile to use (optional)
+  -n, --node string             The node to build on. Defaults to the primary control plane.
       --push                    Push the new image (requires tag)
   -t, --tag string              Tag to apply to the new image (optional)
 ```