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Merge pull request #89567 from giuseppe/cgroupv2-unit-test

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kubelet: add tests for cgroup v2 conversions
This commit is contained in:
Kubernetes Prow Robot 2020-04-02 12:42:52 -07:00 committed by GitHub
commit 4e6a12223b
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3 changed files with 63 additions and 14 deletions
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2
pkg/kubelet/cm/BUILD
View File

@ -181,6 +181,7 @@ go_test(
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
"//staging/src/k8s.io/component-base/featuregate/testing:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups:go_default_library",
"//vendor/github.com/stretchr/testify/assert:go_default_library",
"//vendor/github.com/stretchr/testify/require:go_default_library",
"//vendor/k8s.io/utils/mount:go_default_library",
@ -193,6 +194,7 @@ go_test(
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
"//staging/src/k8s.io/component-base/featuregate/testing:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups:go_default_library",
"//vendor/github.com/stretchr/testify/assert:go_default_library",
"//vendor/github.com/stretchr/testify/require:go_default_library",
"//vendor/k8s.io/utils/mount:go_default_library",

40
pkg/kubelet/cm/cgroup_manager_linux.go
View File

@ -364,6 +364,30 @@ func setSupportedSubsystems(cgroupConfig *libcontainerconfigs.Cgroup) error {
return nil
}
// getCpuWeight converts from the range [2, 262144] to [1, 10000]
func getCpuWeight(cpuShares *uint64) uint64 {
if cpuShares == nil {
return 0
}
if *cpuShares >= 262144 {
return 10000
}
return 1 + ((*cpuShares-2)*9999)/262142
}
// getCpuMax returns the cgroup v2 cpu.max setting given the cpu quota and the cpu period
func getCpuMax(cpuQuota *int64, cpuPeriod *uint64) string {
quotaStr := "max"
periodStr := "100000"
if cpuQuota != nil {
quotaStr = strconv.FormatInt(*cpuQuota, 10)
}
if cpuPeriod != nil {
periodStr = strconv.FormatUint(*cpuPeriod, 10)
}
return fmt.Sprintf("%s %s", quotaStr, periodStr)
}
func (m *cgroupManagerImpl) toResources(resourceConfig *ResourceConfig) *libcontainerconfigs.Resources {
resources := &libcontainerconfigs.Resources{}
if resourceConfig == nil {
@ -373,20 +397,8 @@ func (m *cgroupManagerImpl) toResources(resourceConfig *ResourceConfig) *libcont
resources.Memory = *resourceConfig.Memory
}
if libcontainercgroups.IsCgroup2UnifiedMode() {
if resourceConfig.CpuShares != nil {
// Convert from the range [2-262144] to [1-10000]
resources.CpuWeight = (1 + ((*resourceConfig.CpuShares-2)*9999)/262142)
}
quota := "max"
period := "100000"
if resourceConfig.CpuQuota != nil {
quota = strconv.FormatInt(*resourceConfig.CpuQuota, 10)
}
if resourceConfig.CpuPeriod != nil {
period = strconv.FormatUint(*resourceConfig.CpuPeriod, 10)
}
resources.CpuMax = fmt.Sprintf("%s %s", quota, period)
resources.CpuWeight = getCpuWeight(resourceConfig.CpuShares)
resources.CpuMax = getCpuMax(resourceConfig.CpuQuota, resourceConfig.CpuPeriod)
} else {
if resourceConfig.CpuShares != nil {
resources.CpuShares = *resourceConfig.CpuShares

35
pkg/kubelet/cm/container_manager_linux_test.go
View File

@ -24,6 +24,7 @@ import (
"path"
"testing"
"github.com/opencontainers/runc/libcontainer/cgroups"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
@ -63,6 +64,9 @@ func TestCgroupMountValidationSuccess(t *testing.T) {
}
func TestCgroupMountValidationMemoryMissing(t *testing.T) {
if cgroups.IsCgroup2UnifiedMode() {
t.Skip("skipping cgroup v1 test on a cgroup v2 system")
}
mountInt := mount.NewFakeMounter(
[]mount.MountPoint{
{
@ -86,6 +90,9 @@ func TestCgroupMountValidationMemoryMissing(t *testing.T) {
}
func TestCgroupMountValidationMultipleSubsystem(t *testing.T) {
if cgroups.IsCgroup2UnifiedMode() {
t.Skip("skipping cgroup v1 test on a cgroup v2 system")
}
mountInt := mount.NewFakeMounter(
[]mount.MountPoint{
{
@ -109,6 +116,9 @@ func TestCgroupMountValidationMultipleSubsystem(t *testing.T) {
}
func TestSoftRequirementsValidationSuccess(t *testing.T) {
if cgroups.IsCgroup2UnifiedMode() {
t.Skip("skipping cgroup v1 test on a cgroup v2 system")
}
req := require.New(t)
tempDir, err := ioutil.TempDir("", "")
req.NoError(err)
@ -138,3 +148,28 @@ func TestSoftRequirementsValidationSuccess(t *testing.T) {
assert.NoError(t, err)
assert.True(t, f.cpuHardcapping, "cpu hardcapping is expected to be enabled")
}
func TestGetCpuWeight(t *testing.T) {
assert.Equal(t, uint64(0), getCpuWeight(nil))
v := uint64(2)
assert.Equal(t, uint64(1), getCpuWeight(&v))
v = uint64(262144)
assert.Equal(t, uint64(10000), getCpuWeight(&v))
v = uint64(1000000000)
assert.Equal(t, uint64(10000), getCpuWeight(&v))
}
func TestGetCpuMax(t *testing.T) {
assert.Equal(t, getCpuMax(nil, nil), "max 100000")
quota := int64(50000)
period := uint64(200000)
assert.Equal(t, "50000 200000", getCpuMax(&quota, &period))
assert.Equal(t, "max 200000", getCpuMax(nil, &period))
assert.Equal(t, "50000 100000", getCpuMax(&quota, nil))
}