fix(dm-install): do not require a namespace on kubectl create

When trying to create a new namespace, specifying a namespace will error

dm/install.go

@@ -10,7 +10,7 @@ import (
 // Returns the string output received from the operation, and an error if the
 // command failed.
 func Install(runner kubectl.Runner) (string, error) {
-	o, err := runner.Create([]byte(InstallYAML), "dm")
+	o, err := runner.Create([]byte(InstallYAML))
 	return string(o), err
 }
 

dm/uninstall.go

@@ -9,6 +9,6 @@ import (
 // Returns the string output received from the operation, and an error if the
 // command failed.
 func Uninstall(runner kubectl.Runner) (string, error) {
-	o, err := runner.Delete("dm", "Namespace", "dm")
+	o, err := runner.Delete("dm", "Namespace")
 	return string(o), err
 }

kubectl/create.go

 package kubectl
 
 // Create uploads a chart to Kubernetes
-func (r RealRunner) Create(stdin []byte, ns string) ([]byte, error) {
+func (r RealRunner) Create(stdin []byte) ([]byte, error) {
 	args := []string{"create", "-f", "-"}
 
-	if ns != "" {
-		args = append([]string{"--namespace=" + ns}, args...)
-	}
-
 	cmd := command(args...)
 	assignStdin(cmd, stdin)
 
@@ -15,13 +11,9 @@ func (r RealRunner) Create(stdin []byte, ns string) ([]byte, error) {
 }
 
 // Create returns the commands to kubectl
-func (r PrintRunner) Create(stdin []byte, ns string) ([]byte, error) {
+func (r PrintRunner) Create(stdin []byte) ([]byte, error) {
 	args := []string{"create", "-f", "-"}
 
-	if ns != "" {
-		args = append([]string{"--namespace=" + ns}, args...)
-	}
-
 	cmd := command(args...)
 	assignStdin(cmd, stdin)
 

kubectl/create_test.go

@@ -7,9 +7,9 @@ import (
 func TestPrintCreate(t *testing.T) {
 	var client Runner = PrintRunner{}
 
-	expected := `[CMD] kubectl --namespace=default-namespace create -f - < some stdin data`
+	expected := `[CMD] kubectl create -f - < some stdin data`
 
-	out, err := client.Create([]byte("some stdin data"), "default-namespace")
+	out, err := client.Create([]byte("some stdin data"))
 	if err != nil {
 		t.Error(err)
 	}

kubectl/delete.go

 package kubectl
 
 // Delete removes a chart from Kubernetes.
-func (r RealRunner) Delete(name, ktype, ns string) ([]byte, error) {
+func (r RealRunner) Delete(name, ktype string) ([]byte, error) {
 
 	args := []string{"delete", ktype, name}
 
-	if ns != "" {
-		args = append([]string{"--namespace=" + ns}, args...)
-	}
 	return command(args...).CombinedOutput()
 }
 
 // Delete returns the commands to kubectl
-func (r PrintRunner) Delete(name, ktype, ns string) ([]byte, error) {
+func (r PrintRunner) Delete(name, ktype string) ([]byte, error) {
 
 	args := []string{"delete", ktype, name}
 
-	if ns != "" {
-		args = append([]string{"--namespace=" + ns}, args...)
-	}
-
 	cmd := command(args...)
 	return []byte(cmd.String()), nil
 }

kubectl/kubectl.go

@@ -8,11 +8,11 @@ type Runner interface {
 	// ClusterInfo returns Kubernetes cluster info
 	ClusterInfo() ([]byte, error)
 	// Create uploads a chart to Kubernetes
-	Create([]byte, string) ([]byte, error)
+	Create(stdin []byte) ([]byte, error)
 	// Delete removes a chart from Kubernetes.
-	Delete(string, string, string) ([]byte, error)
+	Delete(name string, ktype string) ([]byte, error)
 	// Get returns Kubernetes resources
-	Get([]byte, string) ([]byte, error)
+	Get(stdin []byte, ns string) ([]byte, error)
 
 	// GetByKind gets an entry by kind, name, and namespace.
 	//