kubernetes: k8s.io/kubernetes/pkg/kubelet/qos Index | Files

package qos

import "k8s.io/kubernetes/pkg/kubelet/qos"

Package qos contains helper functions for quality of service. For each resource (memory, CPU) Kubelet supports three classes of containers. Memory guaranteed containers will receive the highest priority and will get all the resources they need. Burstable containers will be guaranteed their request and can “burst” and use more resources when available. Best-Effort containers, which don’t specify a request, can use resources only if not being used by other pods.


Package Files

doc.go policy.go


const (
    // PodInfraOOMAdj is very docker specific. For arbitrary runtime, it may not make
    // sense to set sandbox level oom score, e.g. a sandbox could only be a namespace
    // without a process.
    // TODO: Handle infra container oom score adj in a runtime agnostic way.
    PodInfraOOMAdj int = -998
    // KubeletOOMScoreAdj is the OOM score adjustment for Kubelet
    KubeletOOMScoreAdj int = -999
    // DockerOOMScoreAdj is the OOM score adjustment for Docker
    DockerOOMScoreAdj int = -999
    // KubeProxyOOMScoreAdj is the OOM score adjustment for kube-proxy
    KubeProxyOOMScoreAdj int = -999

func GetContainerOOMScoreAdjust Uses

func GetContainerOOMScoreAdjust(pod *v1.Pod, container *v1.Container, memoryCapacity int64) int

GetContainerOOMScoreAdjust returns the amount by which the OOM score of all processes in the container should be adjusted. The OOM score of a process is the percentage of memory it consumes multiplied by 10 (barring exceptional cases) + a configurable quantity which is between -1000 and 1000. Containers with higher OOM scores are killed if the system runs out of memory. See https://lwn.net/Articles/391222/ for more information.

Package qos imports 3 packages (graph) and is imported by 393 packages. Updated 2019-09-22. Refresh now. Tools for package owners.