chore(e2e): add test for Affinity trait apache#1547

e2e/common/affinity_test.go

@@ -0,0 +1,149 @@
+// +build integration
+
+// To enable compilation of this file in Goland, go to "Settings -> Go -> Vendoring & Build Tags -> Custom Tags" and add "integration"
+
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You 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.
+*/
+
+package common
+
+import (
+	"fmt"
+	"testing"
+
+	. "github.com/apache/camel-k/e2e/support"
+	camelv1 "github.com/apache/camel-k/pkg/apis/camel/v1"
+
+	. "github.com/onsi/gomega"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func TestAffinityTrait(t *testing.T) {
+	WithNewTestNamespace(t, func(ns string) {
+		Expect(Kamel("install", "-n", ns).Execute()).Should(BeNil())
+
+		var hostname string
+		if node, err := selectSchedulableNode(); err == nil {
+			hostname = node.Labels["kubernetes.io/hostname"]
+		} else {
+			// if 'get nodes' is not allowed, just skip tests for node affinity
+			hostname = ""
+		}
+
+		if hostname != "" {
+			t.Run("Run Java with node affinity", func(t *testing.T) {
+				Expect(Kamel("run", "-n", ns, "files/Java.java",
+					"-t", "affinity.enabled=true",
+					"-t", fmt.Sprintf("affinity.node-affinity-labels=kubernetes.io/hostname in(%s)", hostname)).Execute()).Should(BeNil())
+				Eventually(IntegrationPodPhase(ns, "java"), TestTimeoutLong).Should(Equal(v1.PodRunning))
+				Eventually(IntegrationCondition(ns, "java", camelv1.IntegrationConditionReady), TestTimeoutShort).Should(Equal(v1.ConditionTrue))
+				Eventually(IntegrationLogs(ns, "java"), TestTimeoutShort).Should(ContainSubstring("Magicstring!"))
+
+				pod := IntegrationPod(ns, "java")()
+				Expect(pod.Spec.Affinity).ShouldNot(BeNil())
+				Expect(pod.Spec.Affinity.NodeAffinity).Should(Equal(&v1.NodeAffinity{
+					RequiredDuringSchedulingIgnoredDuringExecution: nodeSelector("kubernetes.io/hostname", v1.NodeSelectorOpIn, hostname),
+				}))
+
+				Expect(Kamel("delete", "--all", "-n", ns).Execute()).Should(BeNil())
+			})
+		}
+
+		t.Run("Run Java with pod affinity", func(t *testing.T) {
+			Expect(Kamel("run", "-n", ns, "files/Java.java",
+				"-t", "affinity.enabled=true",
+				"-t", "affinity.pod-affinity-labels=camel.apache.org/integration").Execute()).Should(BeNil())
+			Eventually(IntegrationPodPhase(ns, "java"), TestTimeoutLong).Should(Equal(v1.PodRunning))
+			Eventually(IntegrationCondition(ns, "java", camelv1.IntegrationConditionReady), TestTimeoutShort).Should(Equal(v1.ConditionTrue))
+			Eventually(IntegrationLogs(ns, "java"), TestTimeoutShort).Should(ContainSubstring("Magicstring!"))
+
+			pod := IntegrationPod(ns, "java")()
+			Expect(pod.Spec.Affinity).ShouldNot(BeNil())
+			Expect(pod.Spec.Affinity.PodAffinity).Should(Equal(&v1.PodAffinity{
+				RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+					podAffinityTerm("camel.apache.org/integration", metav1.LabelSelectorOpExists, "kubernetes.io/hostname"),
+				},
+			}))
+
+			Expect(Kamel("delete", "--all", "-n", ns).Execute()).Should(BeNil())
+		})
+
+		t.Run("Run Java with pod anti affinity", func(t *testing.T) {
+			Expect(Kamel("run", "-n", ns, "files/Java.java",
+				"-t", "affinity.enabled=true",
+				"-t", "affinity.pod-anti-affinity-labels=camel.apache.org/integration").Execute()).Should(BeNil())
+			Eventually(IntegrationPodPhase(ns, "java"), TestTimeoutLong).Should(Equal(v1.PodRunning))
+			Eventually(IntegrationCondition(ns, "java", camelv1.IntegrationConditionReady), TestTimeoutShort).Should(Equal(v1.ConditionTrue))
+			Eventually(IntegrationLogs(ns, "java"), TestTimeoutShort).Should(ContainSubstring("Magicstring!"))
+
+			pod := IntegrationPod(ns, "java")()
+			Expect(pod.Spec.Affinity).ShouldNot(BeNil())
+			Expect(pod.Spec.Affinity.PodAntiAffinity).Should(Equal(&v1.PodAntiAffinity{
+				RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
+					podAffinityTerm("camel.apache.org/integration", metav1.LabelSelectorOpExists, "kubernetes.io/hostname"),
+				},
+			}))
+
+			Expect(Kamel("delete", "--all", "-n", ns).Execute()).Should(BeNil())
+		})
+	})
+}
+
+func selectSchedulableNode() (*v1.Node, error) {
+	nodes, err := TestClient.CoreV1().Nodes().List(TestContext, metav1.ListOptions{})
+	if err != nil {
+		return nil, err
+	}
+	for _, node := range nodes.Items {
+		if node.Spec.Taints == nil {
+			return &node, nil
+		}
+	}
+	return nil, fmt.Errorf("No node available")
+}
+
+func nodeSelector(key string, operator v1.NodeSelectorOperator, value string) *v1.NodeSelector {
+	return &v1.NodeSelector{
+		NodeSelectorTerms: []v1.NodeSelectorTerm{
+			{
+				MatchExpressions: []v1.NodeSelectorRequirement{
+					{
+						Key:      key,
+						Operator: operator,
+						Values:   []string{value},
+					},
+				},
+			},
+		},
+	}
+}
+
+func podAffinityTerm(key string, operator metav1.LabelSelectorOperator, topologyKey string) v1.PodAffinityTerm {
+	return v1.PodAffinityTerm{
+		LabelSelector: &metav1.LabelSelector{
+			MatchExpressions: []metav1.LabelSelectorRequirement{
+				{
+					Key:      key,
+					Operator: operator,
+				},
+			},
+		},
+		TopologyKey: topologyKey,
+	}
+}