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🌱 test: use a daemonset and kubectl exec to provide images to remote …
…clusters (#2955) * test: use a daemonset and kubectl exec to provide images to remote clusters * review fixes * review fixes * log io.Copy error * fix typo
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8 changes: 0 additions & 8 deletions
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test/e2e/data/infrastructure-vsphere-govmomi/main/remote-management/image-injection.yaml
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test/e2e/data/infrastructure-vsphere-govmomi/main/remote-management/kustomization.yaml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| Copyright 2024 The Kubernetes 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. | ||
| */ | ||
|
|
||
| package framework | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| . "github.com/onsi/gomega" | ||
| appsv1 "k8s.io/api/apps/v1" | ||
| "k8s.io/klog/v2" | ||
| "sigs.k8s.io/cluster-api/test/framework" | ||
| . "sigs.k8s.io/cluster-api/test/framework/ginkgoextensions" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
|
||
| // waitForDaemonSetAvailableInput is the input for waitForDaemonSetAvailable. | ||
| type waitForDaemonSetAvailableInput struct { | ||
| Getter framework.Getter | ||
| Daemonset *appsv1.DaemonSet | ||
| } | ||
|
|
||
| // waitForDaemonSetAvailable waits until the DaemonSet is rolled out: | ||
| // * status.updatedNumberScheduled < status.DesiredNumberScheduled. | ||
| // * status.NumberAvailable < status.DesiredNumberScheduled. | ||
| func waitForDaemonSetAvailable(ctx context.Context, input waitForDaemonSetAvailableInput, intervals ...interface{}) { | ||
| Byf("Waiting for daemonset %s to be available", klog.KObj(input.Daemonset)) | ||
| daemonSet := &appsv1.DaemonSet{} | ||
| Eventually(func() bool { | ||
| key := client.ObjectKey{ | ||
| Namespace: input.Daemonset.GetNamespace(), | ||
| Name: input.Daemonset.GetName(), | ||
| } | ||
| if err := input.Getter.Get(ctx, key, daemonSet); err != nil { | ||
| return false | ||
| } | ||
| if daemonSet.Generation <= daemonSet.Status.ObservedGeneration { | ||
| if daemonSet.Status.UpdatedNumberScheduled < daemonSet.Status.DesiredNumberScheduled { | ||
| return false | ||
| } | ||
| if daemonSet.Status.NumberAvailable < daemonSet.Status.DesiredNumberScheduled { | ||
| return false | ||
| } | ||
| return true | ||
| } | ||
| return false | ||
| }, intervals...).Should(BeTrue()) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,229 @@ | ||
| /* | ||
| Copyright 2024 The Kubernetes 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. | ||
| */ | ||
|
|
||
| package framework | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| "time" | ||
|
|
||
| "github.com/onsi/ginkgo/v2" | ||
| . "github.com/onsi/gomega" | ||
| "github.com/pkg/errors" | ||
| appsv1 "k8s.io/api/apps/v1" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| kerrors "k8s.io/apimachinery/pkg/util/errors" | ||
| "k8s.io/apimachinery/pkg/util/httpstream" | ||
| "k8s.io/client-go/kubernetes/scheme" | ||
| "k8s.io/client-go/tools/remotecommand" | ||
| "k8s.io/klog/v2" | ||
| "k8s.io/utils/ptr" | ||
| "sigs.k8s.io/cluster-api/test/framework" | ||
| . "sigs.k8s.io/cluster-api/test/framework/ginkgoextensions" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | ||
| ) | ||
|
|
||
| func LoadImagesFunc(ctx context.Context) func(clusterProxy framework.ClusterProxy) { | ||
| sourceFile := os.Getenv("DOCKER_IMAGE_TAR") | ||
| Expect(sourceFile).ToNot(BeEmpty(), "DOCKER_IMAGE_TAR must be set") | ||
|
|
||
| return func(clusterProxy framework.ClusterProxy) { | ||
| loadImagesToCluster(ctx, sourceFile, clusterProxy) | ||
| } | ||
| } | ||
|
|
||
| // loadImagesToCluster deploys a privileged daemonset and uses it to stream-load container images. | ||
| func loadImagesToCluster(ctx context.Context, sourceFile string, clusterProxy framework.ClusterProxy) { | ||
| daemonSet, daemonSetMutateFn, daemonSetLabels := getPreloadDaemonset() | ||
| ctrlClient := clusterProxy.GetClient() | ||
|
|
||
| // Create the DaemonSet. | ||
| _, err := controllerutil.CreateOrPatch(ctx, ctrlClient, daemonSet, daemonSetMutateFn) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
|
|
||
| // Wait for DaemonSet to be available. | ||
| waitForDaemonSetAvailable(ctx, waitForDaemonSetAvailableInput{Getter: ctrlClient, Daemonset: daemonSet}, time.Minute*3, time.Second*10) | ||
|
|
||
| // List all pods and load images via each found pod. | ||
| pods := &corev1.PodList{} | ||
| Expect(ctrlClient.List( | ||
| ctx, | ||
| pods, | ||
| client.InNamespace(daemonSet.Namespace), | ||
| client.MatchingLabels(daemonSetLabels), | ||
| )).To(Succeed()) | ||
|
|
||
| errs := []error{} | ||
| for j := range pods.Items { | ||
| pod := pods.Items[j] | ||
| Byf("Loading images to node %s via pod %s", pod.Spec.NodeName, klog.KObj(&pod)) | ||
| if err := loadImagesViaPod(ctx, clusterProxy, sourceFile, pod.Namespace, pod.Name, pod.Spec.Containers[0].Name); err != nil { | ||
| errs = append(errs, err) | ||
| } | ||
| } | ||
| Expect(kerrors.NewAggregate(errs)).ToNot(HaveOccurred()) | ||
|
|
||
| // Delete the DaemonSet. | ||
| Expect(ctrlClient.Delete(ctx, daemonSet)).To(Succeed()) | ||
| } | ||
|
|
||
| func loadImagesViaPod(ctx context.Context, clusterProxy framework.ClusterProxy, sourceFile, namespace, podName, containerName string) error { | ||
| // Open source tar file. | ||
| reader, writer := io.Pipe() | ||
| file, err := os.Open(filepath.Clean(sourceFile)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Use go routine to pipe source file content into then stdin. | ||
| go func(file *os.File, writer io.WriteCloser) { | ||
| defer writer.Close() | ||
| defer file.Close() | ||
| // Ignoring the error here because the execPod command should fail in case of | ||
| // failure copying over the data. | ||
| _, err := io.Copy(writer, file) | ||
| if err != nil { | ||
| fmt.Fprintf(ginkgo.GinkgoWriter, "Failed to copy file data to io.Pipe: %v\n", err) | ||
| } | ||
| }(file, writer) | ||
|
|
||
| // Load the container images using ctr and delete the file. | ||
| loadCommand := "ctr -n k8s.io images import -" | ||
| return execPod(ctx, clusterProxy, namespace, podName, containerName, loadCommand, reader) | ||
| } | ||
|
|
||
| // execPod executes a command at a pod. | ||
| // xref: https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/kubectl/pkg/cmd/exec/exec.go#L123 | ||
| func execPod(ctx context.Context, clusterProxy framework.ClusterProxy, namespace, podName, containerName, cmd string, stdin io.Reader) error { | ||
| var hasStdin bool | ||
| if stdin != nil { | ||
| hasStdin = true | ||
| } | ||
|
|
||
| req := clusterProxy.GetClientSet().CoreV1().RESTClient().Post(). | ||
| Namespace(namespace). | ||
| Resource("pods"). | ||
| Name(podName). | ||
| SubResource("exec"). | ||
| VersionedParams(&corev1.PodExecOptions{ | ||
| Container: containerName, | ||
| Command: []string{"/bin/sh", "-c", cmd}, | ||
| Stdin: hasStdin, | ||
| Stdout: true, | ||
| Stderr: true, | ||
| TTY: false, | ||
| }, scheme.ParameterCodec) | ||
|
|
||
| exec, err := remotecommand.NewSPDYExecutor(clusterProxy.GetRESTConfig(), "POST", req.URL()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| // WebSocketExecutor must be "GET" method as described in RFC 6455 Sec. 4.1 (page 17). | ||
| websocketExec, err := remotecommand.NewWebSocketExecutor(clusterProxy.GetRESTConfig(), "GET", req.URL().String()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| exec, err = remotecommand.NewFallbackExecutor(websocketExec, exec, httpstream.IsUpgradeFailure) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var stdout, stderr bytes.Buffer | ||
|
|
||
| err = exec.StreamWithContext(ctx, remotecommand.StreamOptions{ | ||
| Stdin: stdin, | ||
| Stdout: &stdout, | ||
| Stderr: &stderr, | ||
| Tty: false, | ||
| }) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "running command %q stdout=%q, stderr=%q", cmd, stdout.String(), stderr.String()) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func getPreloadDaemonset() (*appsv1.DaemonSet, controllerutil.MutateFn, map[string]string) { | ||
| labels := map[string]string{ | ||
| "app": "image-preloader", | ||
| } | ||
| ds := &appsv1.DaemonSet{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Namespace: metav1.NamespaceSystem, | ||
| Name: "image-preloader", | ||
| Labels: labels, | ||
| }, | ||
| } | ||
| mutateFunc := func() error { | ||
| ds.Labels = labels | ||
| ds.Spec = appsv1.DaemonSetSpec{ | ||
| Selector: &metav1.LabelSelector{ | ||
| MatchLabels: labels, | ||
| }, | ||
| Template: corev1.PodTemplateSpec{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Labels: labels, | ||
| }, | ||
| Spec: corev1.PodSpec{ | ||
| Containers: []corev1.Container{ | ||
| { | ||
| Name: "pause", | ||
| Image: "registry.k8s.io/pause:3.9", | ||
| Command: []string{"/usr/bin/tail", "-f", "/dev/null"}, | ||
| SecurityContext: &corev1.SecurityContext{ | ||
| Privileged: ptr.To(true), | ||
| }, | ||
| VolumeMounts: []corev1.VolumeMount{ | ||
| { | ||
| Name: "host", | ||
| MountPath: "/", | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| HostPID: true, | ||
| HostIPC: true, | ||
| Volumes: []corev1.Volume{ | ||
| { | ||
| Name: "host", | ||
| VolumeSource: corev1.VolumeSource{ | ||
| HostPath: &corev1.HostPathVolumeSource{ | ||
| Path: "/", | ||
| Type: ptr.To(corev1.HostPathDirectory), | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| Tolerations: []corev1.Toleration{ | ||
| // Tolerate any taint. | ||
| { | ||
| Operator: corev1.TolerationOpExists, | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
| return nil | ||
| } | ||
| return ds, mutateFunc, labels | ||
| } |
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