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Merge pull request #89897 from giuseppe/test-e2e-node

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kubelet: fix e2e-node cgroups test on cgroup v2
This commit is contained in:
Kubernetes Prow Robot 2020-04-20 15:54:12 -07:00 committed by GitHub
commit d92fdebd85
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12 changed files with 320 additions and 36 deletions
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2
pkg/kubelet/cm/BUILD
View File

@ -70,6 +70,7 @@ go_library(
"//vendor/github.com/docker/go-units:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs2:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/systemd:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/configs:go_default_library",
"//vendor/k8s.io/utils/io:go_default_library",
@ -121,6 +122,7 @@ go_library(
"//vendor/github.com/docker/go-units:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs2:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/systemd:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/configs:go_default_library",
"//vendor/k8s.io/utils/io:go_default_library",

173
pkg/kubelet/cm/cgroup_manager_linux.go
View File

@ -18,15 +18,18 @@ package cm
import (
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
libcontainercgroups "github.com/opencontainers/runc/libcontainer/cgroups"
cgroupfs "github.com/opencontainers/runc/libcontainer/cgroups/fs"
cgroupfs2 "github.com/opencontainers/runc/libcontainer/cgroups/fs2"
cgroupsystemd "github.com/opencontainers/runc/libcontainer/cgroups/systemd"
libcontainerconfigs "github.com/opencontainers/runc/libcontainer/configs"
"k8s.io/klog"
@ -36,6 +39,7 @@ import (
"k8s.io/apimachinery/pkg/util/sets"
utilfeature "k8s.io/apiserver/pkg/util/feature"
kubefeatures "k8s.io/kubernetes/pkg/features"
cmutil "k8s.io/kubernetes/pkg/kubelet/cm/util"
"k8s.io/kubernetes/pkg/kubelet/metrics"
)
@ -228,6 +232,12 @@ func (m *cgroupManagerImpl) buildCgroupPaths(name CgroupName) map[string]string
return cgroupPaths
}
// buildCgroupUnifiedPath builds a path to the specified name.
func (m *cgroupManagerImpl) buildCgroupUnifiedPath(name CgroupName) string {
cgroupFsAdaptedName := m.Name(name)
return path.Join(cmutil.CgroupRoot, cgroupFsAdaptedName)
}
// TODO(filbranden): This logic belongs in libcontainer/cgroup/systemd instead.
// It should take a libcontainerconfigs.Cgroup.Path field (rather than Name and Parent)
// and split it appropriately, using essentially the logic below.
@ -246,6 +256,21 @@ func updateSystemdCgroupInfo(cgroupConfig *libcontainerconfigs.Cgroup, cgroupNam
// Exists checks if all subsystem cgroups already exist
func (m *cgroupManagerImpl) Exists(name CgroupName) bool {
if libcontainercgroups.IsCgroup2UnifiedMode() {
cgroupPath := m.buildCgroupUnifiedPath(name)
neededControllers := getSupportedUnifiedControllers()
enabledControllers, err := readUnifiedControllers(cgroupPath)
if err != nil {
return false
}
difference := neededControllers.Difference(enabledControllers)
if difference.Len() > 0 {
klog.V(4).Infof("The Cgroup %v has some missing controllers: %v", name, difference)
return false
}
return true
}
// Get map of all cgroup paths on the system for the particular cgroup
cgroupPaths := m.buildCgroupPaths(name)
@ -338,7 +363,7 @@ func getSupportedSubsystems() map[subsystem]bool {
return supportedSubsystems
}
// setSupportedSubsystems sets cgroup resource limits only on the supported
// setSupportedSubsystemsV1 sets cgroup resource limits on cgroup v1 only on the supported
// subsystems. ie. cpu and memory. We don't use libcontainer's cgroup/fs/Set()
// method as it doesn't allow us to skip updates on the devices cgroup
// Allowing or denying all devices by writing 'a' to devices.allow or devices.deny is
@ -347,7 +372,7 @@ func getSupportedSubsystems() map[subsystem]bool {
// We would like to skip setting any values on the device cgroup in this case
// but this is not possible with libcontainers Set() method
// See https://github.com/opencontainers/runc/issues/932
func setSupportedSubsystems(cgroupConfig *libcontainerconfigs.Cgroup) error {
func setSupportedSubsystemsV1(cgroupConfig *libcontainerconfigs.Cgroup) error {
for sys, required := range getSupportedSubsystems() {
if _, ok := cgroupConfig.Paths[sys.Name()]; !ok {
if required {
@ -388,6 +413,106 @@ func getCpuMax(cpuQuota *int64, cpuPeriod *uint64) string {
return fmt.Sprintf("%s %s", quotaStr, periodStr)
}
// readUnifiedControllers reads the controllers available at the specified cgroup
func readUnifiedControllers(path string) (sets.String, error) {
controllersFileContent, err := ioutil.ReadFile(filepath.Join(path, "cgroup.controllers"))
if err != nil {
return nil, err
}
controllers := strings.Fields(string(controllersFileContent))
return sets.NewString(controllers...), nil
}
var (
availableRootControllersOnce sync.Once
availableRootControllers sets.String
)
// getSupportedUnifiedControllers returns a set of supported controllers when running on cgroup v2
func getSupportedUnifiedControllers() sets.String {
// This is the set of controllers used by the Kubelet
supportedControllers := sets.NewString("cpu", "cpuset", "memory", "hugetlb")
if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.SupportPodPidsLimit) || utilfeature.DefaultFeatureGate.Enabled(kubefeatures.SupportNodePidsLimit) {
supportedControllers.Insert("pids")
}
// Memoize the set of controllers that are present in the root cgroup
availableRootControllersOnce.Do(func() {
var err error
availableRootControllers, err = readUnifiedControllers(cmutil.CgroupRoot)
if err != nil {
panic(fmt.Errorf("cannot read cgroup controllers at %s", cmutil.CgroupRoot))
}
})
// Return the set of controllers that are supported both by the Kubelet and by the kernel
return supportedControllers.Intersection(availableRootControllers)
}
// propagateControllers on an unified hierarchy enables all the supported controllers for the specified cgroup
func propagateControllers(path string) error {
if err := os.MkdirAll(path, 0755); err != nil {
return fmt.Errorf("failed to create cgroup %q : %v", path, err)
}
// Retrieve all the supported controllers from the cgroup root
controllersFileContent, err := ioutil.ReadFile(filepath.Join(cmutil.CgroupRoot, "cgroup.controllers"))
if err != nil {
return fmt.Errorf("failed to read controllers from %q : %v", cmutil.CgroupRoot, err)
}
supportedControllers := getSupportedUnifiedControllers()
// The retrieved content looks like: "cpuset cpu io memory hugetlb pids". Prepend each of the controllers
// with '+', so we have something like "+cpuset +cpu +io +memory +hugetlb +pids"
controllers := ""
for _, controller := range strings.Fields(string(controllersFileContent)) {
// ignore controllers we don't care about
if !supportedControllers.Has(controller) {
continue
}
sep := " +"
if controllers == "" {
sep = "+"
}
controllers = controllers + sep + controller
}
current := cmutil.CgroupRoot
relPath, err := filepath.Rel(cmutil.CgroupRoot, path)
if err != nil {
return fmt.Errorf("failed to get relative path to cgroup root from %q: %v", path, err)
}
// Write the controllers list to each "cgroup.subtree_control" file until it reaches the parent cgroup.
// For the /foo/bar/baz cgroup, controllers must be enabled sequentially in the files:
// - /sys/fs/cgroup/foo/cgroup.subtree_control
// - /sys/fs/cgroup/foo/bar/cgroup.subtree_control
for _, p := range strings.Split(filepath.Dir(relPath), "/") {
current = filepath.Join(current, p)
if err := ioutil.WriteFile(filepath.Join(current, "cgroup.subtree_control"), []byte(controllers), 0755); err != nil {
return fmt.Errorf("failed to enable controllers on %q: %v", cmutil.CgroupRoot, err)
}
}
return nil
}
// setResourcesV2 sets cgroup resource limits on cgroup v2
func setResourcesV2(cgroupConfig *libcontainerconfigs.Cgroup) error {
if err := propagateControllers(cgroupConfig.Path); err != nil {
return err
}
allowAll := true
cgroupConfig.Resources.AllowAllDevices = &allowAll
manager, err := cgroupfs2.NewManager(cgroupConfig, cgroupConfig.Path, false)
if err != nil {
return fmt.Errorf("failed to create cgroup v2 manager: %v", err)
}
config := &libcontainerconfigs.Config{
Cgroups: cgroupConfig,
}
return manager.Set(config)
}
func (m *cgroupManagerImpl) toResources(resourceConfig *ResourceConfig) *libcontainerconfigs.Resources {
resources := &libcontainerconfigs.Resources{}
if resourceConfig == nil {
@ -454,12 +579,17 @@ func (m *cgroupManagerImpl) Update(cgroupConfig *CgroupConfig) error {
resourceConfig := cgroupConfig.ResourceParameters
resources := m.toResources(resourceConfig)
cgroupPaths := m.buildCgroupPaths(cgroupConfig.Name)
libcontainerCgroupConfig := &libcontainerconfigs.Cgroup{
Resources: resources,
Paths: cgroupPaths,
}
unified := libcontainercgroups.IsCgroup2UnifiedMode()
if unified {
libcontainerCgroupConfig.Path = m.buildCgroupUnifiedPath(cgroupConfig.Name)
} else {
libcontainerCgroupConfig.Paths = m.buildCgroupPaths(cgroupConfig.Name)
}
// libcontainer consumes a different field and expects a different syntax
// depending on the cgroup driver in use, so we need this conditional here.
if m.adapter.cgroupManagerType == libcontainerSystemd {
@ -472,8 +602,14 @@ func (m *cgroupManagerImpl) Update(cgroupConfig *CgroupConfig) error {
libcontainerCgroupConfig.PidsLimit = *cgroupConfig.ResourceParameters.PidsLimit
}
if err := setSupportedSubsystems(libcontainerCgroupConfig); err != nil {
return fmt.Errorf("failed to set supported cgroup subsystems for cgroup %v: %v", cgroupConfig.Name, err)
if unified {
if err := setResourcesV2(libcontainerCgroupConfig); err != nil {
return fmt.Errorf("failed to set resources for cgroup %v: %v", cgroupConfig.Name, err)
}
} else {
if err := setSupportedSubsystemsV1(libcontainerCgroupConfig); err != nil {
return fmt.Errorf("failed to set supported cgroup subsystems for cgroup %v: %v", cgroupConfig.Name, err)
}
}
return nil
}
@ -619,10 +755,25 @@ func toResourceStats(stats *libcontainercgroups.Stats) *ResourceStats {
// Get sets the ResourceParameters of the specified cgroup as read from the cgroup fs
func (m *cgroupManagerImpl) GetResourceStats(name CgroupName) (*ResourceStats, error) {
cgroupPaths := m.buildCgroupPaths(name)
stats, err := getStatsSupportedSubsystems(cgroupPaths)
if err != nil {
return nil, fmt.Errorf("failed to get stats supported cgroup subsystems for cgroup %v: %v", name, err)
var err error
var stats *libcontainercgroups.Stats
if libcontainercgroups.IsCgroup2UnifiedMode() {
cgroupPath := m.buildCgroupUnifiedPath(name)
manager, err := cgroupfs2.NewManager(nil, cgroupPath, false)
if err != nil {
return nil, fmt.Errorf("failed to create cgroup v2 manager: %v", err)
}
stats, err = manager.GetStats()
if err != nil {
return nil, fmt.Errorf("failed to get stats for cgroup %v: %v", name, err)
}
} else {
cgroupPaths := m.buildCgroupPaths(name)
stats, err = getStatsSupportedSubsystems(cgroupPaths)
if err != nil {
return nil, fmt.Errorf("failed to get stats supported cgroup subsystems for cgroup %v: %v", name, err)
}
}
return toResourceStats(stats), nil
}

1
pkg/kubelet/cm/container_manager_linux.go
View File

@ -162,6 +162,7 @@ func validateSystemRequirements(mountUtil mount.Interface) (features, error) {
}
if cgroups.IsCgroup2UnifiedMode() {
f.cpuHardcapping = true
return f, nil
}

2
test/e2e_node/BUILD
View File

@ -21,6 +21,8 @@ go_library(
"util_sriov.go",
"util_xfs_linux.go",
"util_xfs_unsupported.go",
"utils_linux.go",
"utils_unsupported.go",
],
importpath = "k8s.io/kubernetes/test/e2e_node",
visibility = ["//visibility:public"],

9
test/e2e_node/hugepages_test.go
View File

@ -50,8 +50,13 @@ func makePodToVerifyHugePages(baseName string, hugePagesLimit resource.Quantity)
cgroupFsName = cgroupName.ToCgroupfs()
}
// this command takes the expected value and compares it against the actual value for the pod cgroup hugetlb.2MB.limit_in_bytes
command := fmt.Sprintf("expected=%v; actual=$(cat /tmp/hugetlb/%v/hugetlb.2MB.limit_in_bytes); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", hugePagesLimit.Value(), cgroupFsName)
command := ""
// this command takes the expected value and compares it against the actual value for the pod cgroup hugetlb.2MB.<LIMIT>
if IsCgroup2UnifiedMode() {
command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/%v/hugetlb.2MB.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", hugePagesLimit.Value(), cgroupFsName)
} else {
command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/hugetlb/%v/hugetlb.2MB.limit_in_bytes); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", hugePagesLimit.Value(), cgroupFsName)
}
framework.Logf("Pod to run command: %v", command)
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{

81
test/e2e_node/node_container_manager_test.go
View File

@ -149,6 +149,11 @@ func destroyTemporaryCgroupsForReservation(cgroupManager cm.CgroupManager) error
return cgroupManager.Destroy(cgroupConfig)
}
// convertSharesToWeight converts from cgroup v1 cpu.shares to cgroup v2 cpu.weight
func convertSharesToWeight(shares int64) int64 {
return 1 + ((shares-2)*9999)/262142
}
func runTest(f *framework.Framework) error {
var oldCfg *kubeletconfig.KubeletConfiguration
subsystems, err := cm.GetCgroupSubsystems()
@ -187,8 +192,14 @@ func runTest(f *framework.Framework) error {
expectedNAPodCgroup := cm.ParseCgroupfsToCgroupName(currentConfig.CgroupRoot)
expectedNAPodCgroup = cm.NewCgroupName(expectedNAPodCgroup, "kubepods")
if !cgroupManager.Exists(expectedNAPodCgroup) {
return fmt.Errorf("Expected Node Allocatable Cgroup Does not exist")
return fmt.Errorf("Expected Node Allocatable Cgroup %q does not exist", expectedNAPodCgroup)
}
memoryLimitFile := "memory.limit_in_bytes"
if IsCgroup2UnifiedMode() {
memoryLimitFile = "memory.max"
}
// TODO: Update cgroupManager to expose a Status interface to get current Cgroup Settings.
// The node may not have updated capacity and allocatable yet, so check that it happens eventually.
gomega.Eventually(func() error {
@ -199,20 +210,33 @@ func runTest(f *framework.Framework) error {
if len(nodeList.Items) != 1 {
return fmt.Errorf("Unexpected number of node objects for node e2e. Expects only one node: %+v", nodeList)
}
cgroupName := "kubepods"
if currentConfig.CgroupDriver == "systemd" {
cgroupName = "kubepods.slice"
}
node := nodeList.Items[0]
capacity := node.Status.Capacity
allocatableCPU, allocatableMemory, allocatablePIDs := getAllocatableLimits("200m", "200Mi", "1738", capacity)
// Total Memory reservation is 200Mi excluding eviction thresholds.
// Expect CPU shares on node allocatable cgroup to equal allocatable.
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], "kubepods", "cpu.shares"), int64(cm.MilliCPUToShares(allocatableCPU.MilliValue())), 10); err != nil {
return err
shares := int64(cm.MilliCPUToShares(allocatableCPU.MilliValue()))
if IsCgroup2UnifiedMode() {
// convert to the cgroup v2 cpu.weight value
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupName, "cpu.weight"), convertSharesToWeight(shares), 10); err != nil {
return err
}
} else {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupName, "cpu.shares"), shares, 10); err != nil {
return err
}
}
// Expect Memory limit on node allocatable cgroup to equal allocatable.
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], "kubepods", "memory.limit_in_bytes"), allocatableMemory.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], cgroupName, memoryLimitFile), allocatableMemory.Value(), 0); err != nil {
return err
}
// Expect PID limit on node allocatable cgroup to equal allocatable.
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], "kubepods", "pids.max"), allocatablePIDs.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], cgroupName, "pids.max"), allocatablePIDs.Value(), 0); err != nil {
return err
}
@ -235,42 +259,61 @@ func runTest(f *framework.Framework) error {
return nil
}, time.Minute, 5*time.Second).Should(gomega.BeNil())
kubeReservedCgroupName := cm.NewCgroupName(cm.RootCgroupName, kubeReservedCgroup)
if !cgroupManager.Exists(kubeReservedCgroupName) {
return fmt.Errorf("Expected kube reserved cgroup Does not exist")
cgroupPath := ""
if currentConfig.CgroupDriver == "systemd" {
cgroupPath = cm.ParseSystemdToCgroupName(kubeReservedCgroup).ToSystemd()
} else {
cgroupPath = cgroupManager.Name(cm.NewCgroupName(cm.RootCgroupName, kubeReservedCgroup))
}
// Expect CPU shares on kube reserved cgroup to equal it's reservation which is `100m`.
kubeReservedCPU := resource.MustParse(currentConfig.KubeReserved[string(v1.ResourceCPU)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupManager.Name(kubeReservedCgroupName), "cpu.shares"), int64(cm.MilliCPUToShares(kubeReservedCPU.MilliValue())), 10); err != nil {
return err
shares := int64(cm.MilliCPUToShares(kubeReservedCPU.MilliValue()))
if IsCgroup2UnifiedMode() {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupPath, "cpu.weight"), convertSharesToWeight(shares), 10); err != nil {
return err
}
} else {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupPath, "cpu.shares"), shares, 10); err != nil {
return err
}
}
// Expect Memory limit kube reserved cgroup to equal configured value `100Mi`.
kubeReservedMemory := resource.MustParse(currentConfig.KubeReserved[string(v1.ResourceMemory)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], cgroupManager.Name(kubeReservedCgroupName), "memory.limit_in_bytes"), kubeReservedMemory.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], cgroupPath, memoryLimitFile), kubeReservedMemory.Value(), 0); err != nil {
return err
}
// Expect process ID limit kube reserved cgroup to equal configured value `738`.
kubeReservedPIDs := resource.MustParse(currentConfig.KubeReserved[string(pidlimit.PIDs)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], cgroupManager.Name(kubeReservedCgroupName), "pids.max"), kubeReservedPIDs.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], cgroupPath, "pids.max"), kubeReservedPIDs.Value(), 0); err != nil {
return err
}
systemReservedCgroupName := cm.NewCgroupName(cm.RootCgroupName, systemReservedCgroup)
if !cgroupManager.Exists(systemReservedCgroupName) {
return fmt.Errorf("Expected system reserved cgroup Does not exist")
if currentConfig.CgroupDriver == "systemd" {
cgroupPath = cm.ParseSystemdToCgroupName(systemReservedCgroup).ToSystemd()
} else {
cgroupPath = cgroupManager.Name(cm.NewCgroupName(cm.RootCgroupName, systemReservedCgroup))
}
// Expect CPU shares on system reserved cgroup to equal it's reservation which is `100m`.
systemReservedCPU := resource.MustParse(currentConfig.SystemReserved[string(v1.ResourceCPU)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupManager.Name(systemReservedCgroupName), "cpu.shares"), int64(cm.MilliCPUToShares(systemReservedCPU.MilliValue())), 10); err != nil {
return err
shares = int64(cm.MilliCPUToShares(systemReservedCPU.MilliValue()))
if IsCgroup2UnifiedMode() {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupPath, "cpu.weight"), convertSharesToWeight(shares), 10); err != nil {
return err
}
} else {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["cpu"], cgroupPath, "cpu.shares"), shares, 10); err != nil {
return err
}
}
// Expect Memory limit on node allocatable cgroup to equal allocatable.
systemReservedMemory := resource.MustParse(currentConfig.SystemReserved[string(v1.ResourceMemory)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], cgroupManager.Name(systemReservedCgroupName), "memory.limit_in_bytes"), systemReservedMemory.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["memory"], cgroupPath, memoryLimitFile), systemReservedMemory.Value(), 0); err != nil {
return err
}
// Expect process ID limit system reserved cgroup to equal configured value `1000`.
systemReservedPIDs := resource.MustParse(currentConfig.SystemReserved[string(pidlimit.PIDs)])
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], cgroupManager.Name(systemReservedCgroupName), "pids.max"), systemReservedPIDs.Value(), 0); err != nil {
if err := expectFileValToEqual(filepath.Join(subsystems.MountPoints["pids"], cgroupPath, "pids.max"), systemReservedPIDs.Value(), 0); err != nil {
return err
}
return nil

8
test/e2e_node/pids_test.go
View File

@ -45,7 +45,13 @@ func makePodToVerifyPids(baseName string, pidsLimit resource.Quantity) *v1.Pod {
}
// this command takes the expected value and compares it against the actual value for the pod cgroup pids.max
command := fmt.Sprintf("expected=%v; actual=$(cat /tmp/pids/%v/pids.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", pidsLimit.Value(), cgroupFsName)
command := ""
if IsCgroup2UnifiedMode() {
command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/%v/pids.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", pidsLimit.Value(), cgroupFsName)
} else {
command = fmt.Sprintf("expected=%v; actual=$(cat /tmp/pids/%v/pids.max); if [ \"$expected\" -ne \"$actual\" ]; then exit 1; fi; ", pidsLimit.Value(), cgroupFsName)
}
framework.Logf("Pod to run command: %v", command)
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{

18
test/e2e_node/pods_container_manager_test.go
View File

@ -75,8 +75,14 @@ func makePodToVerifyCgroups(cgroupNames []string) *v1.Pod {
klog.Infof("expecting %v cgroups to be found", cgroupFsNames)
// build the pod command to either verify cgroups exist
command := ""
for _, cgroupFsName := range cgroupFsNames {
localCommand := "if [ ! -d /tmp/memory/" + cgroupFsName + " ] || [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 1; fi; "
localCommand := ""
if IsCgroup2UnifiedMode() {
localCommand = "if [ ! -d /tmp/" + cgroupFsName + " ]; then exit 1; fi; "
} else {
localCommand = "if [ ! -d /tmp/memory/" + cgroupFsName + " ] || [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 1; fi; "
}
command += localCommand
}
@ -117,6 +123,14 @@ func makePodToVerifyCgroupRemoved(baseName string) *v1.Pod {
components := strings.Split(baseName, "/")
cgroupName := cm.NewCgroupName(cm.RootCgroupName, components...)
cgroupFsName := toCgroupFsName(cgroupName)
command := ""
if IsCgroup2UnifiedMode() {
command = "for i in `seq 1 10`; do if [ ! -d /tmp/" + cgroupFsName + " ]; then exit 0; else sleep 10; fi; done; exit 1"
} else {
command = "for i in `seq 1 10`; do if [ ! -d /tmp/memory/" + cgroupFsName + " ] && [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 0; else sleep 10; fi; done; exit 1"
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "pod" + string(uuid.NewUUID()),
@ -127,7 +141,7 @@ func makePodToVerifyCgroupRemoved(baseName string) *v1.Pod {
{
Image: busyboxImage,
Name: "container" + string(uuid.NewUUID()),
Command: []string{"sh", "-c", "for i in `seq 1 10`; do if [ ! -d /tmp/memory/" + cgroupFsName + " ] && [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 0; else sleep 10; fi; done; exit 1"},
Command: []string{"sh", "-c", command},
VolumeMounts: []v1.VolumeMount{
{
Name: "sysfscgroup",

4
test/e2e_node/services/kubelet.go
View File

@ -194,6 +194,10 @@ func (e *E2EServices) startKubelet() (*server, error) {
unitName := fmt.Sprintf("kubelet-%s.service", unitTimestamp)
cmdArgs = append(cmdArgs,
systemdRun,
"-p", "Delegate=true",
"-p", "CPUAccounting=true",
"-p", "MemoryAccounting=true",
"-p", "TasksAccounting=true",
"--unit="+unitName,
"--slice=runtime.slice",
"--remain-after-exit",

6
test/e2e_node/summary_test.go
View File

@ -435,7 +435,11 @@ func recordSystemCgroupProcesses() {
continue
}
pids, err := ioutil.ReadFile(fmt.Sprintf("/sys/fs/cgroup/cpu/%s/cgroup.procs", cgroup))
filePattern := "/sys/fs/cgroup/cpu/%s/cgroup.procs"
if IsCgroup2UnifiedMode() {
filePattern = "/sys/fs/cgroup/%s/cgroup.procs"
}
pids, err := ioutil.ReadFile(fmt.Sprintf(filePattern, cgroup))
if err != nil {
framework.Logf("Failed to read processes in cgroup %s: %v", name, err)
continue

28
test/e2e_node/utils_linux.go Normal file
View File

@ -0,0 +1,28 @@
// +build linux
/*
Copyright 2020 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 e2enode
import (
libcontainercgroups "github.com/opencontainers/runc/libcontainer/cgroups"
)
// IsCgroup2UnifiedMode returns whether we are running in cgroup v2 unified mode.
func IsCgroup2UnifiedMode() bool {
return libcontainercgroups.IsCgroup2UnifiedMode()
}

24
test/e2e_node/utils_unsupported.go Normal file
View File

@ -0,0 +1,24 @@
// +build !linux
/*
Copyright 2020 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 e2enode
// IsCgroup2UnifiedMode returns whether we are running in cgroup v2 unified mode.
func IsCgroup2UnifiedMode() bool {
return false
}