add test to make sure volume is gone

test/integration/multinode_test.go

@@ -189,4 +189,11 @@ func validateDeleteNodeFromMultiNode(ctx context.Context, t *testing.T, profile
 		t.Errorf("status says both kubelets are not running: args %q: %v", rr.Command(), rr.Stdout.String())
 	}
 
+	if DockerDriver() {
+		rr, err := Run(t, exec.Command("docker", "volume", "ls"))
+		if strings.Contains(rr.Stdout.String(), fmt.Sprintf("%s-%s", profile, name) {
+			t.Errorf("docker volume was not properly deleted: %s", rr.Stdout.String())
+		}
+	}
+
 }