github/kubernetes
1
0
Fork 0
mirror of https://github.com/k3s-io/kubernetes.git synced 2025-07-24 04:06:03 +00:00
Code Issues Projects Releases Wiki Activity

kubelet: Record kubelet_evictions when limits are hit

Browse Source 
The pod, container, and emptyDir volumes can all trigger evictions
when their limits are breached. To ensure that administrators can
alert on these type of evictions, update kubelet_evictions to include
the following signal types:

* ephemeralcontainerfs.limit - container ephemeral storage breaches its limit
* ephemeralpodfs.limit - pod ephemeral storage breaches its limit
* emptydirfs.limit - pod emptyDir storage breaches its limit
This commit is contained in:
Clayton Coleman 2020-02-06 17:14:59 -05:00
parent 6a92f19444
commit af9e0be163
No known key found for this signature in database
GPG Key ID: 3D16906B4F1C5CB3
1 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
pkg/kubelet/eviction/eviction_manager.go
View File

@ -47,6 +47,15 @@ const (
podCleanupPollFreq = time.Second
)
const (
// signalEphemeralContainerFsLimit is amount of storage available on filesystem requested by the container
signalEphemeralContainerFsLimit string = "ephemeralcontainerfs.limit"
// signalEphemeralPodFsLimit is amount of storage available on filesystem requested by the pod
signalEphemeralPodFsLimit string = "ephemeralpodfs.limit"
// signalEmptyDirFsLimit is amount of storage available on filesystem requested by an emptyDir
signalEmptyDirFsLimit string = "emptydirfs.limit"
)
// managerImpl implements Manager
type managerImpl struct {
// used to track time
@ -480,7 +489,11 @@ func (m *managerImpl) emptyDirLimitEviction(podStats statsapi.PodStats, pod *v1.
used := podVolumeUsed[pod.Spec.Volumes[i].Name]
if used != nil && size != nil && size.Sign() == 1 && used.Cmp(*size) > 0 {
// the emptyDir usage exceeds the size limit, evict the pod
return m.evictPod(pod, 0, fmt.Sprintf(emptyDirMessageFmt, pod.Spec.Volumes[i].Name, size.String()), nil)
if m.evictPod(pod, 0, fmt.Sprintf(emptyDirMessageFmt, pod.Spec.Volumes[i].Name, size.String()), nil) {
metrics.Evictions.WithLabelValues(signalEmptyDirFsLimit).Inc()
return true
}
return false
}
}
}
@ -512,7 +525,11 @@ func (m *managerImpl) podEphemeralStorageLimitEviction(podStats statsapi.PodStat
podEphemeralStorageLimit := podLimits[v1.ResourceEphemeralStorage]
if podEphemeralStorageTotalUsage.Cmp(podEphemeralStorageLimit) > 0 {
// the total usage of pod exceeds the total size limit of containers, evict the pod
return m.evictPod(pod, 0, fmt.Sprintf(podEphemeralStorageMessageFmt, podEphemeralStorageLimit.String()), nil)
if m.evictPod(pod, 0, fmt.Sprintf(podEphemeralStorageMessageFmt, podEphemeralStorageLimit.String()), nil) {
metrics.Evictions.WithLabelValues(signalEphemeralPodFsLimit).Inc()
return true
}
return false
}
return false
}
@ -534,8 +551,11 @@ func (m *managerImpl) containerEphemeralStorageLimitEviction(podStats statsapi.P
if ephemeralStorageThreshold, ok := thresholdsMap[containerStat.Name]; ok {
if ephemeralStorageThreshold.Cmp(*containerUsed) < 0 {
return m.evictPod(pod, 0, fmt.Sprintf(containerEphemeralStorageMessageFmt, containerStat.Name, ephemeralStorageThreshold.String()), nil)
if m.evictPod(pod, 0, fmt.Sprintf(containerEphemeralStorageMessageFmt, containerStat.Name, ephemeralStorageThreshold.String()), nil) {
metrics.Evictions.WithLabelValues(signalEphemeralContainerFsLimit).Inc()
return true
}
return false
}
}
}