starlingx/integ
Code Issues Proposed changes
c47f0964d9
integ/kubernetes/kubernetes-1.22.5/centos/files/kubelet-cpumanager-disable-CFS-quota-throttling-for-.patch
Daniel Safta a046a7a650 Add kubernetes 1.22.5 pkg 
Here are the changes needed for adding k8s v1.22.5
in StarlingX alongside with the changes needed
for the build environment to find and build the package.

The package builds successfully.
Deployed an iso with k8s 1.22.5 on
AIO-SX and AIO-DX. The deployment phase
works and the pods are up and running after
the upgrade completes.

Story: 2009789
Task: 44305
Signed-off-by: Daniel Safta <daniel.safta@windriver.com>
Change-Id: Ibb9be075fa0b1491b9ab1854ebb1fddf4df53461
2022-01-28 11:56:47 +02:00

298 lines
13 KiB
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Raw Blame History

From 3f69868f7bca99f6875dd4d197b3a974d1b558ed Mon Sep 17 00:00:00 2001
From: Daniel Safta <daniel.safta@windriver.com>
Date: Wed, 22 Sep 2021 10:09:06 -0400
Subject: [PATCH 1/7] kubelet cpumanager disable CFS quota throttling for
Guaranteed pods
This disables CFS CPU quota to avoid performance degradation due to
Linux kernel CFS quota implementation. Note that 4.18 kernel attempts
to solve the CFS throttling problem, but there are reports that it is
not completely effective.
This disables CFS quota throttling for Guaranteed pods for both
parent and container cgroups by writing -1 to cgroup cpu.cfs_quota_us.
Disabling has a dramatic latency improvement for HTTP response times.
This patch is refactored in 1.21.3 due to new internal_container_lifecycle
framework. We leverage the same mechanism to set Linux resources as:
cpu manager: specify the container CPU set during the creation
(commit 38dc7509f862f081828e7d9167107b8c6e98ea23).
Signed-off-by: Daniel Safta <daniel.safta@windriver.com>
Co-authored-by: Jim Gauld <james.gauld@windriver.com>
---
pkg/kubelet/cm/cpumanager/cpu_manager.go | 7 +++
pkg/kubelet/cm/cpumanager/fake_cpu_manager.go | 12 +++--
pkg/kubelet/cm/helpers_linux.go | 12 ++++-
pkg/kubelet/cm/helpers_linux_test.go | 45 ++++++++++---------
.../cm/internal_container_lifecycle_linux.go | 12 ++++-
5 files changed, 61 insertions(+), 27 deletions(-)
diff --git a/pkg/kubelet/cm/cpumanager/cpu_manager.go b/pkg/kubelet/cm/cpumanager/cpu_manager.go
index 4777c132..29194271 100644
--- a/pkg/kubelet/cm/cpumanager/cpu_manager.go
+++ b/pkg/kubelet/cm/cpumanager/cpu_manager.go
@@ -72,6 +72,9 @@ type Manager interface {
// State returns a read-only interface to the internal CPU manager state.
State() state.Reader
+ // GetCPUPolicy returns the assigned CPU manager policy
+ GetCPUPolicy() string
+
// GetTopologyHints implements the topologymanager.HintProvider Interface
// and is consulted to achieve NUMA aware resource alignment among this
// and other resource controllers.
@@ -310,6 +313,10 @@ func (m *manager) State() state.Reader {
return m.state
}
+func (m *manager) GetCPUPolicy() string {
+ return m.policy.Name()
+}
+
func (m *manager) GetTopologyHints(pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint {
// The pod is during the admission phase. We need to save the pod to avoid it
// being cleaned before the admission ended
diff --git a/pkg/kubelet/cm/cpumanager/fake_cpu_manager.go b/pkg/kubelet/cm/cpumanager/fake_cpu_manager.go
index 28578e64..018f13b6 100644
--- a/pkg/kubelet/cm/cpumanager/fake_cpu_manager.go
+++ b/pkg/kubelet/cm/cpumanager/fake_cpu_manager.go
@@ -17,7 +17,7 @@ limitations under the License.
package cpumanager
import (
- "k8s.io/api/core/v1"
+ v1 "k8s.io/api/core/v1"
"k8s.io/klog/v2"
"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
"k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/state"
@@ -28,7 +28,8 @@ import (
)
type fakeManager struct {
- state state.State
+ policy Policy
+ state state.State
}
func (m *fakeManager) Start(activePods ActivePodsFunc, sourcesReady config.SourcesReady, podStatusProvider status.PodStatusProvider, containerRuntime runtimeService, initialContainers containermap.ContainerMap) error {
@@ -70,6 +71,10 @@ func (m *fakeManager) State() state.Reader {
return m.state
}
+func (m *fakeManager) GetCPUPolicy() string {
+ return m.policy.Name()
+}
+
func (m *fakeManager) GetCPUs(podUID, containerName string) cpuset.CPUSet {
klog.InfoS("GetCPUs", "podUID", podUID, "containerName", containerName)
return cpuset.CPUSet{}
@@ -83,6 +88,7 @@ func (m *fakeManager) GetAllocatableCPUs() cpuset.CPUSet {
// NewFakeManager creates empty/fake cpu manager
func NewFakeManager() Manager {
return &fakeManager{
- state: state.NewMemoryState(),
+ policy: &nonePolicy{},
+ state: state.NewMemoryState(),
}
}
diff --git a/pkg/kubelet/cm/helpers_linux.go b/pkg/kubelet/cm/helpers_linux.go
index 33b14e31..a6e5326b 100644
--- a/pkg/kubelet/cm/helpers_linux.go
+++ b/pkg/kubelet/cm/helpers_linux.go
@@ -25,7 +25,7 @@ import (
libcontainercgroups "github.com/opencontainers/runc/libcontainer/cgroups"
- "k8s.io/api/core/v1"
+ v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/v1/resource"
@@ -167,6 +167,16 @@ func ResourceConfigForPod(pod *v1.Pod, enforceCPULimits bool, cpuPeriod uint64,
// build the result
result := &ResourceConfig{}
if qosClass == v1.PodQOSGuaranteed {
+ // Disable CFS CPU quota to avoid performance degradation due to
+ // Linux kernel CFS throttle implementation.
+ // NOTE: 4.18 kernel attempts to solve CFS throttling problem,
+ // but there are reports that it is not completely effective.
+ // This will configure cgroup CFS parameters at pod level:
+ // /sys/fs/cgroup/cpu/k8s-infra/kubepods/<pod>/cpu.cfs_quota_us
+ // /sys/fs/cgroup/cpu/k8s-infra/kubepods/<pod>/cpu.cfs_period_us
+ cpuQuota = int64(-1)
+ cpuPeriod = uint64(100000)
+
result.CpuShares = &cpuShares
result.CpuQuota = &cpuQuota
result.CpuPeriod = &cpuPeriod
diff --git a/pkg/kubelet/cm/helpers_linux_test.go b/pkg/kubelet/cm/helpers_linux_test.go
index bdd01ea1..b907f575 100644
--- a/pkg/kubelet/cm/helpers_linux_test.go
+++ b/pkg/kubelet/cm/helpers_linux_test.go
@@ -1,3 +1,4 @@
+//go:build linux
// +build linux
/*
@@ -24,7 +25,7 @@ import (
"testing"
"time"
- "k8s.io/api/core/v1"
+ v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
utilfeature "k8s.io/apiserver/pkg/util/feature"
featuregatetesting "k8s.io/component-base/featuregate/testing"
@@ -63,8 +64,9 @@ func TestResourceConfigForPod(t *testing.T) {
burstablePartialShares := MilliCPUToShares(200)
burstableQuota := MilliCPUToQuota(200, int64(defaultQuotaPeriod))
guaranteedShares := MilliCPUToShares(100)
- guaranteedQuota := MilliCPUToQuota(100, int64(defaultQuotaPeriod))
- guaranteedTunedQuota := MilliCPUToQuota(100, int64(tunedQuotaPeriod))
+ guaranteedQuotaPeriod := uint64(100000)
+ guaranteedQuota := int64(-1)
+ guaranteedTunedQuota := int64(-1)
memoryQuantity = resource.MustParse("100Mi")
cpuNoLimit := int64(-1)
guaranteedMemory := memoryQuantity.Value()
@@ -203,8 +205,8 @@ func TestResourceConfigForPod(t *testing.T) {
},
},
enforceCPULimits: true,
- quotaPeriod: defaultQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedQuota, CpuPeriod: &defaultQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedQuota, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-no-cpu-enforcement": {
pod: &v1.Pod{
@@ -217,8 +219,8 @@ func TestResourceConfigForPod(t *testing.T) {
},
},
enforceCPULimits: false,
- quotaPeriod: defaultQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &defaultQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-with-tuned-quota": {
pod: &v1.Pod{
@@ -231,8 +233,8 @@ func TestResourceConfigForPod(t *testing.T) {
},
},
enforceCPULimits: true,
- quotaPeriod: tunedQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedTunedQuota, CpuPeriod: &tunedQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedTunedQuota, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-no-cpu-enforcement-with-tuned-quota": {
pod: &v1.Pod{
@@ -245,8 +247,8 @@ func TestResourceConfigForPod(t *testing.T) {
},
},
enforceCPULimits: false,
- quotaPeriod: tunedQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &tunedQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
}
@@ -283,8 +285,9 @@ func TestResourceConfigForPodWithCustomCPUCFSQuotaPeriod(t *testing.T) {
burstablePartialShares := MilliCPUToShares(200)
burstableQuota := MilliCPUToQuota(200, int64(defaultQuotaPeriod))
guaranteedShares := MilliCPUToShares(100)
- guaranteedQuota := MilliCPUToQuota(100, int64(defaultQuotaPeriod))
- guaranteedTunedQuota := MilliCPUToQuota(100, int64(tunedQuotaPeriod))
+ guaranteedQuotaPeriod := uint64(100000)
+ guaranteedQuota := int64(-1)
+ guaranteedTunedQuota := int64(-1)
memoryQuantity = resource.MustParse("100Mi")
cpuNoLimit := int64(-1)
guaranteedMemory := memoryQuantity.Value()
@@ -423,8 +426,8 @@ func TestResourceConfigForPodWithCustomCPUCFSQuotaPeriod(t *testing.T) {
},
},
enforceCPULimits: true,
- quotaPeriod: defaultQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedQuota, CpuPeriod: &defaultQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedQuota, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-no-cpu-enforcement": {
pod: &v1.Pod{
@@ -437,8 +440,8 @@ func TestResourceConfigForPodWithCustomCPUCFSQuotaPeriod(t *testing.T) {
},
},
enforceCPULimits: false,
- quotaPeriod: defaultQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &defaultQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-with-tuned-quota": {
pod: &v1.Pod{
@@ -451,8 +454,8 @@ func TestResourceConfigForPodWithCustomCPUCFSQuotaPeriod(t *testing.T) {
},
},
enforceCPULimits: true,
- quotaPeriod: tunedQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedTunedQuota, CpuPeriod: &tunedQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &guaranteedTunedQuota, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
"guaranteed-no-cpu-enforcement-with-tuned-quota": {
pod: &v1.Pod{
@@ -465,8 +468,8 @@ func TestResourceConfigForPodWithCustomCPUCFSQuotaPeriod(t *testing.T) {
},
},
enforceCPULimits: false,
- quotaPeriod: tunedQuotaPeriod,
- expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &tunedQuotaPeriod, Memory: &guaranteedMemory},
+ quotaPeriod: guaranteedQuotaPeriod,
+ expected: &ResourceConfig{CpuShares: &guaranteedShares, CpuQuota: &cpuNoLimit, CpuPeriod: &guaranteedQuotaPeriod, Memory: &guaranteedMemory},
},
}
diff --git a/pkg/kubelet/cm/internal_container_lifecycle_linux.go b/pkg/kubelet/cm/internal_container_lifecycle_linux.go
index 9cf41620..2e15d9ba 100644
--- a/pkg/kubelet/cm/internal_container_lifecycle_linux.go
+++ b/pkg/kubelet/cm/internal_container_lifecycle_linux.go
@@ -1,3 +1,4 @@
+//go:build linux
// +build linux
/*
@@ -22,8 +23,9 @@ import (
"strconv"
"strings"
- "k8s.io/api/core/v1"
+ v1 "k8s.io/api/core/v1"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
+ v1qos "k8s.io/kubernetes/pkg/apis/core/v1/helper/qos"
)
func (i *internalContainerLifecycleImpl) PreCreateContainer(pod *v1.Pod, container *v1.Container, containerConfig *runtimeapi.ContainerConfig) error {
@@ -33,7 +35,13 @@ func (i *internalContainerLifecycleImpl) PreCreateContainer(pod *v1.Pod, contain
containerConfig.Linux.Resources.CpusetCpus = allocatedCPUs.String()
}
}
-
+ // Disable cgroup CFS throttle at the container level.
+ // /sys/fs/cgroup/cpu/k8s-infra/kubepods/<pod>/<container>/cpu.cfs_quota_us
+ // /sys/fs/cgroup/cpu/k8s-infra/kubepods/<pod>/<container>/cpu.cfs_period_us
+ if i.cpuManager.GetCPUPolicy() == "static" && v1qos.GetPodQOS(pod) == v1.PodQOSGuaranteed {
+ containerConfig.Linux.Resources.CpuPeriod = int64(100000)
+ containerConfig.Linux.Resources.CpuQuota = int64(-1)
+ }
if i.memoryManager != nil {
numaNodes := i.memoryManager.GetMemoryNUMANodes(pod, container)
if numaNodes.Len() > 0 {
--
2.17.1
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