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Fix oom-score-adj policy in kubelet.

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Docker daemon and kubelet needs to be protected by setting oom-score-adj to -999.

Signed-off-by: Vishnu kannan <vishnuk@google.com>
This commit is contained in:
Vishnu kannan
2016-09-07 18:32:38 -07:00
parent f59f4aecfa
commit e4acad7afb
9 changed files with 274 additions and 98 deletions
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9
pkg/kubelet/qos/policy.go
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@@ -21,8 +21,9 @@ import (
)
const (
PodInfraOOMAdj int = -999
PodInfraOOMAdj int = -998
KubeletOOMScoreAdj int = -999
DockerOOMScoreAdj int = -999
KubeProxyOOMScoreAdj int = -999
guaranteedOOMScoreAdj int = -998
besteffortOOMScoreAdj int = 1000
@@ -53,10 +54,10 @@ func GetContainerOOMScoreAdjust(pod *api.Pod, container *api.Container, memoryCa
// Note that this is a heuristic, it won't work if a container has many small processes.
memoryRequest := container.Resources.Requests.Memory().Value()
oomScoreAdjust := 1000 - (1000*memoryRequest)/memoryCapacity
// A guaranteed pod using 100% of memory can have an OOM score of 1. Ensure
// A guaranteed pod using 100% of memory can have an OOM score of 10. Ensure
// that burstable pods have a higher OOM score adjustment.
if oomScoreAdjust < 2 {
return 2
if int(oomScoreAdjust) < (1000 + guaranteedOOMScoreAdj) {
return (1000 + guaranteedOOMScoreAdj)
}
// Give burstable pods a higher chance of survival over besteffort pods.
if int(oomScoreAdjust) == besteffortOOMScoreAdj {