feat: using localhost configuration (#28)

we don't need to setup ssh keys if we use the localhost configuration.
i really don't know how i manage to get this far without realising this
but this hugely simplifies the code.

Author: ricardomaraschini

pkg/config/config.go

@@ -17,12 +17,12 @@ import (
 	"github.com/k0sproject/dig"
 	"github.com/k0sproject/k0sctl/pkg/apis/k0sctl.k0sproject.io/v1beta1"
 	"github.com/k0sproject/k0sctl/pkg/apis/k0sctl.k0sproject.io/v1beta1/cluster"
+	"github.com/k0sproject/rig"
 	"github.com/sirupsen/logrus"
 	"gopkg.in/yaml.v2"
 
 	"github.com/replicatedhq/helmvm/pkg/defaults"
 	"github.com/replicatedhq/helmvm/pkg/infra"
-	"github.com/replicatedhq/helmvm/pkg/ssh"
 )
 
 // ReadConfigFile reads the cluster configuration from the provided file.
@@ -307,28 +307,17 @@ func generateConfigForHosts(lb string, hosts ...*cluster.Host) (*v1beta1.Cluster
 // renderSingleNodeConfig renders a configuration to allow k0sctl to install in the localhost
 // in a single-node configuration.
 func renderSingleNodeConfig(ctx context.Context) (*v1beta1.Cluster, error) {
-	usr, err := user.Current()
-	if err != nil {
-		return nil, fmt.Errorf("unable to get current user: %w", err)
-	}
-	if err := ssh.AllowLocalSSH(); err != nil {
-		return nil, fmt.Errorf("unable to allow localhost SSH: %w", err)
-	}
-	ipaddr, err := defaults.PreferredNodeIPAddress()
-	if err != nil {
-		return nil, fmt.Errorf("unable to get preferred node IP address: %w", err)
-	}
-	host := &hostcfg{
-		Address: ipaddr,
-		Role:    "controller+worker",
-		Port:    22,
-		User:    usr.Username,
-		KeyPath: defaults.SSHKeyPath(),
-	}
-	if err := host.testConnection(); err != nil {
-		return nil, fmt.Errorf("unable to connect to %s: %w", ipaddr, err)
+	rhost := &cluster.Host{
+		Role:         "controller+worker",
+		UploadBinary: true,
+		NoTaints:     true,
+		InstallFlags: []string{"--disable-components konnectivity-server"},
+		Connection: rig.Connection{
+			Localhost: &rig.Localhost{
+				Enabled: true,
+			},
+		},
 	}
-	rhost := host.render()
 	return generateConfigForHosts("", rhost)
 }