Add new flag "--ports" to expose ports for docker & podman drivers

cmd/minikube/cmd/start_flags.go

@@ -107,6 +107,7 @@ const (
 	forceSystemd            = "force-systemd"
 	kicBaseImage            = "base-image"
 	startOutput             = "output"
+	ports                   = "ports"
 )
 
 // initMinikubeFlags includes commandline flags for minikube.
@@ -197,6 +198,9 @@ func initDriverFlags() {
 	startCmd.Flags().String(hypervVirtualSwitch, "", "The hyperv virtual switch name. Defaults to first found. (hyperv driver only)")
 	startCmd.Flags().Bool(hypervUseExternalSwitch, false, "Whether to use external switch over Default Switch if virtual switch not explicitly specified. (hyperv driver only)")
 	startCmd.Flags().String(hypervExternalAdapter, "", "External Adapter on which external switch will be created if no external switch is found. (hyperv driver only)")
+
+	// docker & podman
+	startCmd.Flags().StringSlice(ports, []string{}, "List of ports that should be exposed (docker and podman driver only)")
 }
 
 // initNetworkingFlags inits the commandline flags for connectivity related flags for start
@@ -311,6 +315,7 @@ func generateClusterConfig(cmd *cobra.Command, existing *config.ClusterConfig, k
 			HostOnlyNicType:         viper.GetString(hostOnlyNicType),
 			NatNicType:              viper.GetString(natNicType),
 			StartHostTimeout:        viper.GetDuration(waitTimeout),
+			ExposedPorts:            viper.GetStringSlice(ports),
 			KubernetesConfig: config.KubernetesConfig{
 				KubernetesVersion:      k8sVersion,
 				ClusterName:            ClusterFlagValue(),
@@ -547,6 +552,10 @@ func updateExistingConfigFromFlags(cmd *cobra.Command, existing *config.ClusterC
 		cc.KubernetesConfig.NodePort = viper.GetInt(apiServerPort)
 	}
 
+	if cmd.Flags().Changed(vsockPorts) {
+		cc.ExposedPorts = viper.GetStringSlice(ports)
+	}
+
 	// pre minikube 1.9.2 cc.KubernetesConfig.NodePort was not populated.
 	// in minikube config there were two fields for api server port.
 	// one in cc.KubernetesConfig.NodePort and one in cc.Nodes.Port

pkg/drivers/kic/kic.go

@@ -78,7 +78,7 @@ func (d *Driver) Create() error {
 		CPUs:          strconv.Itoa(d.NodeConfig.CPU),
 		Memory:        strconv.Itoa(d.NodeConfig.Memory) + "mb",
 		Envs:          d.NodeConfig.Envs,
-		ExtraArgs:     []string{"--expose", fmt.Sprintf("%d", d.NodeConfig.APIServerPort)},
+		ExtraArgs:     append([]string{"--expose", fmt.Sprintf("%d", d.NodeConfig.APIServerPort)}, d.NodeConfig.ExtraArgs...),
 		OCIBinary:     d.NodeConfig.OCIBinary,
 		APIServerPort: d.NodeConfig.APIServerPort,
 	}

pkg/drivers/kic/types.go

@@ -61,4 +61,5 @@ type Config struct {
 	Envs              map[string]string // key,value of environment variables passed to the node
 	KubernetesVersion string            // Kubernetes version to install
 	ContainerRuntime  string            // container runtime kic is running
+	ExtraArgs         []string          // a list of any extra option to pass to oci binary during creation time, for example --expose 8080...
 }

pkg/minikube/config/types.go

@@ -71,6 +71,7 @@ type ClusterConfig struct {
 	Addons                  map[string]bool
 	VerifyComponents        map[string]bool // map of components to verify and wait for after start.
 	StartHostTimeout        time.Duration
+	ExposedPorts            []string // Only used by the docker and podman driver
 }
 
 // KubernetesConfig contains the parameters used to configure the VM Kubernetes.

pkg/minikube/registry/drvs/docker/docker.go

@@ -60,6 +60,12 @@ func configure(cc config.ClusterConfig, n config.Node) (interface{}, error) {
 		}
 	}
 
+	extraArgs := []string{}
+
+	for _, port := range cc.ExposedPorts {
+		extraArgs = append(extraArgs, "-p", port)
+	}
+
 	return kic.NewDriver(kic.Config{
 		ClusterName:       cc.Name,
 		MachineName:       driver.MachineName(cc, n),
@@ -72,6 +78,7 @@ func configure(cc config.ClusterConfig, n config.Node) (interface{}, error) {
 		APIServerPort:     cc.Nodes[0].Port,
 		KubernetesVersion: cc.KubernetesConfig.KubernetesVersion,
 		ContainerRuntime:  cc.KubernetesConfig.ContainerRuntime,
+		ExtraArgs:         extraArgs,
 	}), nil
 }
 

pkg/minikube/registry/drvs/podman/podman.go

@@ -72,6 +72,12 @@ func configure(cc config.ClusterConfig, n config.Node) (interface{}, error) {
 		}
 	}
 
+	extraArgs := []string{}
+
+	for _, port := range cc.ExposedPorts {
+		extraArgs = append(extraArgs, "-p", port)
+	}
+
 	return kic.NewDriver(kic.Config{
 		ClusterName:       cc.Name,
 		MachineName:       driver.MachineName(cc, n),
@@ -84,6 +90,7 @@ func configure(cc config.ClusterConfig, n config.Node) (interface{}, error) {
 		APIServerPort:     cc.Nodes[0].Port,
 		KubernetesVersion: cc.KubernetesConfig.KubernetesVersion,
 		ContainerRuntime:  cc.KubernetesConfig.ContainerRuntime,
+		ExtraArgs:         extraArgs,
 	}), nil
 }
 

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

@@ -83,6 +83,7 @@ minikube start [flags]
       --no-vtx-check                      Disable checking for the availability of hardware virtualization before the vm is started (virtualbox driver only)
   -n, --nodes int                         The number of nodes to spin up. Defaults to 1. (default 1)
   -o, --output string                     Format to print stdout in. Options include: [text,json] (default "text")
+      --ports strings                     List of ports that should be exposed (docker and podman driver only)
       --preload                           If set, download tarball of preloaded images if available to improve start time. Defaults to true. (default true)
       --registry-mirror strings           Registry mirrors to pass to the Docker daemon
       --service-cluster-ip-range string   The CIDR to be used for service cluster IPs. (default "10.96.0.0/12")