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kubelet.go
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kubelet.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package components
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1"
"k8s.io/utils/ptr"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
)
// ConfigurableKubeletCLIFlags is the set of configurable kubelet command line parameters.
type ConfigurableKubeletCLIFlags struct{}
// KubeletCLIFlagsFromCoreV1beta1KubeletConfig computes the ConfigurableKubeletCLIFlags based on the provided
// gardencorev1beta1.KubeletConfig.
func KubeletCLIFlagsFromCoreV1beta1KubeletConfig(_ *gardencorev1beta1.KubeletConfig) ConfigurableKubeletCLIFlags {
return ConfigurableKubeletCLIFlags{}
}
// ConfigurableKubeletConfigParameters is the set of configurable kubelet config parameters.
type ConfigurableKubeletConfigParameters struct {
ContainerLogMaxSize *string
ContainerLogMaxFiles *int32
CpuCFSQuota *bool
CpuManagerPolicy *string
EvictionHard map[string]string
EvictionMinimumReclaim map[string]string
EvictionSoft map[string]string
EvictionSoftGracePeriod map[string]string
EvictionPressureTransitionPeriod *metav1.Duration
EvictionMaxPodGracePeriod *int32
FailSwapOn *bool
FeatureGates map[string]bool
ImageGCHighThresholdPercent *int32
ImageGCLowThresholdPercent *int32
SeccompDefault *bool
SerializeImagePulls *bool
StreamingConnectionIdleTimeout *metav1.Duration
RegistryPullQPS *int32
RegistryBurst *int32
KubeReserved map[string]string
MaxPods *int32
MemorySwap *kubeletconfigv1beta1.MemorySwapConfiguration
PodPidsLimit *int64
ProtectKernelDefaults *bool
SystemReserved map[string]string
}
const (
// MemoryAvailable is a constant for the 'memory.available' eviction setting.
MemoryAvailable = "memory.available"
// ImageFSAvailable is a constant for the 'imagefs.available' eviction setting.
ImageFSAvailable = "imagefs.available"
// ImageFSInodesFree is a constant for the 'imagefs.inodesFree' eviction setting.
ImageFSInodesFree = "imagefs.inodesFree"
// NodeFSAvailable is a constant for the 'nodefs.available' eviction setting.
NodeFSAvailable = "nodefs.available"
// NodeFSInodesFree is a constant for the 'nodefs.inodesFree' eviction setting.
NodeFSInodesFree = "nodefs.inodesFree"
)
// KubeletConfigParametersFromCoreV1beta1KubeletConfig computes the ConfigurableKubeletConfigParameters based on the provided
// gardencorev1beta1.KubeletConfig.
func KubeletConfigParametersFromCoreV1beta1KubeletConfig(kubeletConfig *gardencorev1beta1.KubeletConfig) ConfigurableKubeletConfigParameters {
var out ConfigurableKubeletConfigParameters
if kubeletConfig != nil {
out.ContainerLogMaxFiles = kubeletConfig.ContainerLogMaxFiles
if val := kubeletConfig.ContainerLogMaxSize; val != nil {
out.ContainerLogMaxSize = ptr.To(val.String())
}
out.CpuCFSQuota = kubeletConfig.CPUCFSQuota
out.CpuManagerPolicy = kubeletConfig.CPUManagerPolicy
out.EvictionMaxPodGracePeriod = kubeletConfig.EvictionMaxPodGracePeriod
out.EvictionPressureTransitionPeriod = kubeletConfig.EvictionPressureTransitionPeriod
out.FailSwapOn = kubeletConfig.FailSwapOn
out.ImageGCHighThresholdPercent = kubeletConfig.ImageGCHighThresholdPercent
out.ImageGCLowThresholdPercent = kubeletConfig.ImageGCLowThresholdPercent
out.SeccompDefault = kubeletConfig.SeccompDefault
out.SerializeImagePulls = kubeletConfig.SerializeImagePulls
out.RegistryPullQPS = kubeletConfig.RegistryPullQPS
out.RegistryBurst = kubeletConfig.RegistryBurst
out.FeatureGates = kubeletConfig.FeatureGates
out.KubeReserved = reservedFromKubeletConfig(kubeletConfig.KubeReserved)
out.MaxPods = kubeletConfig.MaxPods
out.PodPidsLimit = kubeletConfig.PodPIDsLimit
out.ProtectKernelDefaults = kubeletConfig.ProtectKernelDefaults
out.StreamingConnectionIdleTimeout = kubeletConfig.StreamingConnectionIdleTimeout
out.SystemReserved = reservedFromKubeletConfig(kubeletConfig.SystemReserved)
if eviction := kubeletConfig.EvictionHard; eviction != nil {
if out.EvictionHard == nil {
out.EvictionHard = make(map[string]string)
}
if val := eviction.MemoryAvailable; val != nil {
out.EvictionHard[MemoryAvailable] = *val
}
if val := eviction.ImageFSAvailable; val != nil {
out.EvictionHard[ImageFSAvailable] = *val
}
if val := eviction.ImageFSInodesFree; val != nil {
out.EvictionHard[ImageFSInodesFree] = *val
}
if val := eviction.NodeFSAvailable; val != nil {
out.EvictionHard[NodeFSAvailable] = *val
}
if val := eviction.NodeFSInodesFree; val != nil {
out.EvictionHard[NodeFSInodesFree] = *val
}
}
if eviction := kubeletConfig.EvictionSoft; eviction != nil {
if out.EvictionSoft == nil {
out.EvictionSoft = make(map[string]string)
}
if val := eviction.MemoryAvailable; val != nil {
out.EvictionSoft[MemoryAvailable] = *val
}
if val := eviction.ImageFSAvailable; val != nil {
out.EvictionSoft[ImageFSAvailable] = *val
}
if val := eviction.ImageFSInodesFree; val != nil {
out.EvictionSoft[ImageFSInodesFree] = *val
}
if val := eviction.NodeFSAvailable; val != nil {
out.EvictionSoft[NodeFSAvailable] = *val
}
if val := eviction.NodeFSInodesFree; val != nil {
out.EvictionSoft[NodeFSInodesFree] = *val
}
}
if eviction := kubeletConfig.EvictionMinimumReclaim; eviction != nil {
if out.EvictionMinimumReclaim == nil {
out.EvictionMinimumReclaim = make(map[string]string)
}
if val := eviction.MemoryAvailable; val != nil {
out.EvictionMinimumReclaim[MemoryAvailable] = val.String()
}
if val := eviction.ImageFSAvailable; val != nil {
out.EvictionMinimumReclaim[ImageFSAvailable] = val.String()
}
if val := eviction.ImageFSInodesFree; val != nil {
out.EvictionMinimumReclaim[ImageFSInodesFree] = val.String()
}
if val := eviction.NodeFSAvailable; val != nil {
out.EvictionMinimumReclaim[NodeFSAvailable] = val.String()
}
if val := eviction.NodeFSInodesFree; val != nil {
out.EvictionMinimumReclaim[NodeFSInodesFree] = val.String()
}
}
if eviction := kubeletConfig.EvictionSoftGracePeriod; eviction != nil {
if out.EvictionSoftGracePeriod == nil {
out.EvictionSoftGracePeriod = make(map[string]string)
}
if val := eviction.MemoryAvailable; val != nil {
out.EvictionSoftGracePeriod[MemoryAvailable] = val.Duration.String()
}
if val := eviction.ImageFSAvailable; val != nil {
out.EvictionSoftGracePeriod[ImageFSAvailable] = val.Duration.String()
}
if val := eviction.ImageFSInodesFree; val != nil {
out.EvictionSoftGracePeriod[ImageFSInodesFree] = val.Duration.String()
}
if val := eviction.NodeFSAvailable; val != nil {
out.EvictionSoftGracePeriod[NodeFSAvailable] = val.Duration.String()
}
if val := eviction.NodeFSInodesFree; val != nil {
out.EvictionSoftGracePeriod[NodeFSInodesFree] = val.Duration.String()
}
}
if kubeletConfig.MemorySwap != nil && kubeletConfig.MemorySwap.SwapBehavior != nil {
out.MemorySwap = &kubeletconfigv1beta1.MemorySwapConfiguration{SwapBehavior: string(*kubeletConfig.MemorySwap.SwapBehavior)}
}
}
return out
}
func reservedFromKubeletConfig(reserved *gardencorev1beta1.KubeletConfigReserved) map[string]string {
if reserved == nil {
return nil
}
out := make(map[string]string)
if cpu := reserved.CPU; cpu != nil {
out["cpu"] = cpu.String()
}
if memory := reserved.Memory; memory != nil {
out["memory"] = memory.String()
}
if ephemeralStorage := reserved.EphemeralStorage; ephemeralStorage != nil {
out["ephemeral-storage"] = ephemeralStorage.String()
}
if pid := reserved.PID; pid != nil {
out["pid"] = pid.String()
}
return out
}