Add longhorn storage test (#6445)

Signed-off-by: Brooks Newberry <brooks@newberry.com>
(cherry picked from commit bbda54b332)
Signed-off-by: Ian Cardoso <osodracnai@gmail.com>

tests/integration/integration.go

@@ -162,12 +162,12 @@ func CheckDeployments(deployments []string) error {
 	return nil
 }
 
-func ParsePods(opts metav1.ListOptions) ([]corev1.Pod, error) {
+func ParsePods(namespace string, opts metav1.ListOptions) ([]corev1.Pod, error) {
 	clientSet, err := k8sClient()
 	if err != nil {
 		return nil, err
 	}
-	pods, err := clientSet.CoreV1().Pods("").List(context.Background(), opts)
+	pods, err := clientSet.CoreV1().Pods(namespace).List(context.Background(), opts)
 	if err != nil {
 		return nil, err
 	}
@@ -188,6 +188,30 @@ func ParseNodes() ([]corev1.Node, error) {
 	return nodes.Items, nil
 }
 
+func GetPod(namespace, name string) (*corev1.Pod, error) {
+	client, err := k8sClient()
+	if err != nil {
+		return nil, err
+	}
+	return client.CoreV1().Pods(namespace).Get(context.Background(), name, metav1.GetOptions{})
+}
+
+func GetPersistentVolumeClaim(namespace, name string) (*corev1.PersistentVolumeClaim, error) {
+	client, err := k8sClient()
+	if err != nil {
+		return nil, err
+	}
+	return client.CoreV1().PersistentVolumeClaims(namespace).Get(context.Background(), name, metav1.GetOptions{})
+}
+
+func GetPersistentVolume(name string) (*corev1.PersistentVolume, error) {
+	client, err := k8sClient()
+	if err != nil {
+		return nil, err
+	}
+	return client.CoreV1().PersistentVolumes().Get(context.Background(), name, metav1.GetOptions{})
+}
+
 func FindStringInCmdAsync(scanner *bufio.Scanner, target string) bool {
 	for scanner.Scan() {
 		if strings.Contains(scanner.Text(), target) {

tests/integration/longhorn/longhorn_int_test.go

@@ -0,0 +1,154 @@
+package longhorn
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+	"testing"
+
+	testutil "github.com/k3s-io/k3s/tests/integration"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+var server *testutil.K3sServer
+var serverArgs = []string{"--cluster-init"}
+var testLock int
+
+var _ = BeforeSuite(func() {
+	if _, err := exec.LookPath("iscsiadm"); err != nil {
+		Skip("Test needs open-iscsi to be installed")
+	} else if !testutil.IsExistingServer() {
+		var err error
+		testLock, err = testutil.K3sTestLock()
+		Expect(err).ToNot(HaveOccurred())
+		server, err = testutil.K3sStartServer(serverArgs...)
+		Expect(err).ToNot(HaveOccurred())
+	}
+})
+
+var _ = Describe("longhorn", Ordered, func() {
+	BeforeEach(func() {
+		if testutil.IsExistingServer() && !testutil.ServerArgsPresent(serverArgs) {
+			Skip("Test needs k3s server with: " + strings.Join(serverArgs, " "))
+		}
+	})
+
+	When("a new cluster is created", func() {
+		It("starts up with no problems", func() {
+			Eventually(func() error {
+				return testutil.K3sDefaultDeployments()
+			}, "120s", "5s").Should(Succeed())
+		})
+	})
+
+	When("longhorn is installed", func() {
+		It("installs components into the longhorn-system namespace", func() {
+			result, err := testutil.K3sCmd("kubectl apply -f ./testdata/longhorn.yaml")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(result).To(ContainSubstring("namespace/longhorn-system created"))
+			Expect(result).To(ContainSubstring("daemonset.apps/longhorn-manager created"))
+			Expect(result).To(ContainSubstring("deployment.apps/longhorn-driver-deployer created"))
+			Expect(result).To(ContainSubstring("deployment.apps/longhorn-recovery-backend created"))
+			Expect(result).To(ContainSubstring("deployment.apps/longhorn-ui created"))
+			Expect(result).To(ContainSubstring("deployment.apps/longhorn-conversion-webhook created"))
+			Expect(result).To(ContainSubstring("deployment.apps/longhorn-admission-webhook created"))
+		})
+		It("starts the longhorn pods with no problems", func() {
+			Eventually(func() error {
+				pods, err := testutil.ParsePods("longhorn-system", metav1.ListOptions{})
+				if err != nil {
+					return err
+				}
+				for _, pod := range pods {
+					if pod.Status.Phase != "Running" && pod.Status.Phase != "Succeeded" {
+						return fmt.Errorf("pod %s failing", pod.Name)
+					}
+				}
+				return nil
+			}, "120s", "5s").Should(Succeed())
+		})
+	})
+
+	When("persistent volume claim is created", func() {
+		It("creates the pv and pvc", func() {
+			result, err := testutil.K3sCmd("kubectl create -f ./testdata/pvc.yaml")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(result).To(ContainSubstring("persistentvolumeclaim/longhorn-volv-pvc created"))
+			Eventually(func() error {
+				pvc, err := testutil.GetPersistentVolumeClaim("default", "longhorn-volv-pvc")
+				if err != nil {
+					return fmt.Errorf("failed to get pvc longhorn-volv-pvc")
+				}
+				if pvc.Status.Phase != "Bound" {
+					return fmt.Errorf("pvc longhorn-volv-pvc not bound")
+				}
+				pv, err := testutil.GetPersistentVolume(pvc.Spec.VolumeName)
+				if err != nil {
+					return fmt.Errorf("failed to get pv %s", pvc.Spec.VolumeName)
+				}
+				if pv.Status.Phase != "Bound" {
+					return fmt.Errorf("pv %s not bound", pv.Name)
+				}
+				return nil
+			}, "300s", "5s").Should(Succeed())
+		})
+		It("creates a pod with the pvc", func() {
+			result, err := testutil.K3sCmd("kubectl create -f ./testdata/pod.yaml")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(result).To(ContainSubstring("pod/volume-test created"))
+			Eventually(func() error {
+				pod, err := testutil.GetPod("default", "volume-test")
+				if err != nil {
+					return fmt.Errorf("failed to get pod volume-test")
+				}
+				if pod.Status.Phase != "Running" {
+					return fmt.Errorf("pod volume-test \"%s\" reason: \"%s\" message \"%s\"", pod.Status.Phase, pod.Status.Reason, pod.Status.Message)
+				}
+				return nil
+			}, "60s", "5s").Should(Succeed())
+		})
+	})
+
+	When("the pvc is deleted", func() {
+		It("the pv is deleted according to the default reclaim policy", func() {
+			result, err := testutil.K3sCmd("kubectl delete pod volume-test")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(result).To(ContainSubstring("pod \"volume-test\" deleted"))
+			result, err = testutil.K3sCmd("kubectl delete pvc longhorn-volv-pvc")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(result).To(ContainSubstring("persistentvolumeclaim \"longhorn-volv-pvc\" deleted"))
+			Eventually(func() error {
+				result, err = testutil.K3sCmd("kubectl get pv")
+				if err != nil {
+					return fmt.Errorf("failed get persistent volumes")
+				}
+				if !strings.Contains(result, "No resources found") {
+					return fmt.Errorf("persistent volumes still exist")
+				}
+				return nil
+			}, "60s", "5s").Should(Succeed())
+		})
+	})
+})
+
+var failed bool
+var _ = AfterEach(func() {
+	failed = failed || CurrentSpecReport().Failed()
+})
+
+var _ = AfterSuite(func() {
+	if !testutil.IsExistingServer() {
+		if failed {
+			testutil.K3sSaveLog(server, false)
+		}
+		Expect(testutil.K3sKillServer(server)).To(Succeed())
+		Expect(testutil.K3sCleanup(testLock, "")).To(Succeed())
+	}
+})
+
+func Test_IntegrationLonghorn(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Longhorn Suite")
+}

tests/integration/longhorn/testdata/pod.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: volume-test
+  namespace: default
+spec:
+  containers:
+  - name: volume-test
+    image: nginx:stable-alpine
+    imagePullPolicy: IfNotPresent
+    volumeMounts:
+    - name: volv
+      mountPath: /data
+    ports:
+    - containerPort: 80
+  volumes:
+  - name: volv
+    persistentVolumeClaim:
+      claimName: longhorn-volv-pvc

tests/integration/longhorn/testdata/pvc.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: longhorn-volv-pvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: 1Gi