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All code must use the context from Ginkgo when doing API calls or polling for a change, otherwise the code would not return immediately when the test gets aborted.
425 lines
12 KiB
Go
425 lines
12 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package node
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import (
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"context"
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/kubernetes/test/e2e/framework"
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e2enetwork "k8s.io/kubernetes/test/e2e/framework/network"
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e2epodoutput "k8s.io/kubernetes/test/e2e/framework/pod/output"
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imageutils "k8s.io/kubernetes/test/utils/image"
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admissionapi "k8s.io/pod-security-admission/api"
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"github.com/onsi/ginkgo/v2"
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)
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var _ = SIGDescribe("Downward API", func() {
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f := framework.NewDefaultFramework("downward-api")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
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/*
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Release: v1.9
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Testname: DownwardAPI, environment for name, namespace and ip
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Description: Downward API MUST expose Pod and Container fields as environment variables. Specify Pod Name, namespace and IP as environment variable in the Pod Spec are visible at runtime in the container.
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*/
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framework.ConformanceIt("should provide pod name, namespace and IP address as env vars [NodeConformance]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "POD_NAME",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "metadata.name",
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},
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},
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},
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{
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Name: "POD_NAMESPACE",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "metadata.namespace",
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},
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},
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},
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{
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Name: "POD_IP",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "status.podIP",
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},
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},
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},
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}
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expectations := []string{
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fmt.Sprintf("POD_NAME=%v", podName),
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fmt.Sprintf("POD_NAMESPACE=%v", f.Namespace.Name),
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fmt.Sprintf("POD_IP=%v|%v", e2enetwork.RegexIPv4, e2enetwork.RegexIPv6),
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}
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testDownwardAPI(ctx, f, podName, env, expectations)
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})
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/*
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Release: v1.9
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Testname: DownwardAPI, environment for host ip
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Description: Downward API MUST expose Pod and Container fields as environment variables. Specify host IP as environment variable in the Pod Spec are visible at runtime in the container.
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*/
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framework.ConformanceIt("should provide host IP as an env var [NodeConformance]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "HOST_IP",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "status.hostIP",
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},
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},
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},
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}
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expectations := []string{
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fmt.Sprintf("HOST_IP=%v|%v", e2enetwork.RegexIPv4, e2enetwork.RegexIPv6),
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}
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testDownwardAPI(ctx, f, podName, env, expectations)
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})
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ginkgo.It("should provide host IP and pod IP as an env var if pod uses host network [LinuxOnly]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "HOST_IP",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "status.hostIP",
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},
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},
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},
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{
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Name: "POD_IP",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "status.podIP",
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},
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},
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},
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}
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expectations := []string{
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fmt.Sprintf("OK"),
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}
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", `[[ "${HOST_IP:?}" == "${POD_IP:?}" ]] && echo 'OK' || echo "HOST_IP: '${HOST_IP}' != POD_IP: '${POD_IP}'"`},
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Env: env,
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},
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},
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HostNetwork: true,
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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testDownwardAPIUsingPod(ctx, f, pod, env, expectations)
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})
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/*
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Release: v1.9
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Testname: DownwardAPI, environment for CPU and memory limits and requests
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Description: Downward API MUST expose CPU request and Memory request set through environment variables at runtime in the container.
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*/
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framework.ConformanceIt("should provide container's limits.cpu/memory and requests.cpu/memory as env vars [NodeConformance]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "CPU_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.cpu",
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},
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},
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},
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{
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Name: "MEMORY_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.memory",
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},
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},
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},
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{
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Name: "CPU_REQUEST",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "requests.cpu",
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},
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},
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},
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{
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Name: "MEMORY_REQUEST",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "requests.memory",
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},
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},
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},
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}
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expectations := []string{
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"CPU_LIMIT=2",
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"MEMORY_LIMIT=67108864",
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"CPU_REQUEST=1",
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"MEMORY_REQUEST=33554432",
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}
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testDownwardAPI(ctx, f, podName, env, expectations)
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})
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/*
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Release: v1.9
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Testname: DownwardAPI, environment for default CPU and memory limits and requests
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Description: Downward API MUST expose CPU request and Memory limits set through environment variables at runtime in the container.
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*/
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framework.ConformanceIt("should provide default limits.cpu/memory from node allocatable [NodeConformance]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "CPU_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.cpu",
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},
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},
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},
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{
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Name: "MEMORY_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.memory",
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},
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},
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},
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}
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expectations := []string{
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"CPU_LIMIT=[1-9]",
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"MEMORY_LIMIT=[1-9]",
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}
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", "env"},
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Env: env,
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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testDownwardAPIUsingPod(ctx, f, pod, env, expectations)
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})
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/*
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Release: v1.9
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Testname: DownwardAPI, environment for Pod UID
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Description: Downward API MUST expose Pod UID set through environment variables at runtime in the container.
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*/
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framework.ConformanceIt("should provide pod UID as env vars [NodeConformance]", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "POD_UID",
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ValueFrom: &v1.EnvVarSource{
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FieldRef: &v1.ObjectFieldSelector{
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APIVersion: "v1",
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FieldPath: "metadata.uid",
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},
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},
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},
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}
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expectations := []string{
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"POD_UID=[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12}",
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}
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testDownwardAPI(ctx, f, podName, env, expectations)
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})
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})
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var _ = SIGDescribe("Downward API [Serial] [Disruptive] [NodeFeature:DownwardAPIHugePages]", func() {
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f := framework.NewDefaultFramework("downward-api")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
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ginkgo.Context("Downward API tests for hugepages", func() {
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ginkgo.It("should provide container's limits.hugepages-<pagesize> and requests.hugepages-<pagesize> as env vars", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "HUGEPAGES_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.hugepages-2Mi",
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},
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},
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},
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{
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Name: "HUGEPAGES_REQUEST",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "requests.hugepages-2Mi",
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},
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},
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},
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}
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// Important: we explicitly request no hugepages so the test can run where none are present.
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expectations := []string{
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fmt.Sprintf("HUGEPAGES_LIMIT=%d", 0),
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fmt.Sprintf("HUGEPAGES_REQUEST=%d", 0),
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}
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", "env"},
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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"cpu": resource.MustParse("10m"),
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"hugepages-2Mi": resource.MustParse("0Mi"),
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},
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Limits: v1.ResourceList{
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"hugepages-2Mi": resource.MustParse("0Mi"),
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},
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},
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Env: env,
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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testDownwardAPIUsingPod(ctx, f, pod, env, expectations)
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})
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ginkgo.It("should provide default limits.hugepages-<pagesize> from node allocatable", func(ctx context.Context) {
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podName := "downward-api-" + string(uuid.NewUUID())
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env := []v1.EnvVar{
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{
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Name: "HUGEPAGES_LIMIT",
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ValueFrom: &v1.EnvVarSource{
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ResourceFieldRef: &v1.ResourceFieldSelector{
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Resource: "limits.hugepages-2Mi",
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},
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},
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},
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}
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// Important: we allow for 0 so the test passes in environments where no hugepages are allocated.
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expectations := []string{
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"HUGEPAGES_LIMIT=((0)|([1-9][0-9]*))\n",
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}
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", "env"},
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Env: env,
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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testDownwardAPIUsingPod(ctx, f, pod, env, expectations)
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})
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})
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})
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func testDownwardAPI(ctx context.Context, f *framework.Framework, podName string, env []v1.EnvVar, expectations []string) {
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dapi-container",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"sh", "-c", "env"},
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("250m"),
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v1.ResourceMemory: resource.MustParse("32Mi"),
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},
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Limits: v1.ResourceList{
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v1.ResourceCPU: resource.MustParse("1250m"),
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v1.ResourceMemory: resource.MustParse("64Mi"),
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},
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},
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Env: env,
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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testDownwardAPIUsingPod(ctx, f, pod, env, expectations)
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}
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func testDownwardAPIUsingPod(ctx context.Context, f *framework.Framework, pod *v1.Pod, env []v1.EnvVar, expectations []string) {
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e2epodoutput.TestContainerOutputRegexp(ctx, f, "downward api env vars", pod, 0, expectations)
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}
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