test/components/kubernetes: add tests that nodes has configured labels

Now that we don't run disruptive test for self-hosted kubelet, we should
have a test, that the labels configured by the user for the worker pool
are actually applied on the node objects.

Signed-off-by: Mateusz Gozdek <mateusz@kinvolk.io>

test/components/kubernetes/doc.go

@@ -0,0 +1,20 @@
+// Copyright 2020 The Lokomotive Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build aws aws_edge packet baremetal
+// +build e2e
+
+// Package kubernetes contains e2e tests related to core Kubernetes
+// services, like kubelet etc.
+package kubernetes

test/components/kubernetes/kubelet_labels_test.go

@@ -0,0 +1,41 @@
+// Copyright 2020 The Lokomotive Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build packet baremetal
+// +build e2e
+
+package kubernetes //nolint:testpackage
+
+import (
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	testutil "github.com/kinvolk/lokomotive/test/components/util"
+)
+
+func TestNodeHasLabels(t *testing.T) {
+	client := testutil.CreateKubeClient(t)
+
+	nodes, err := client.CoreV1().Nodes().List(metav1.ListOptions{
+		LabelSelector: "testing.io=yes,roleofnode=testing",
+	})
+	if err != nil {
+		t.Errorf("could not list nodes: %v", err)
+	}
+
+	if len(nodes.Items) == 0 {
+		t.Fatalf("no worker nodes found")
+	}
+}