我如何告诉kubectl
目前使用的pod有多少ephemeral storage?
在Kubernetes pod规范中,我可以指定CPU,内存和临时存储的资源请求和限制:
resources:
requests:
memory: "60Mi"
cpu: "70m"
ephemeral-storage: "2Gi"
limits:
memory: "65Mi"
cpu: "75m"
ephemeral-storage: "4Gi"
但是,为了设置短暂存储的良好请求和限制,我需要知道这个值实际上对于正在运行的pod是什么,我无法弄清楚。我可以使用kubectl top pod
获得CPU和内存使用量,但是,据我所知,ephemeral storage usage is only actually calculated when making an actual eviction decision。
纯粹的原始方法是使用disk usage(du)Unix命令行。
shell进入你的pod:
$ kubectl exec -it <pod-id> sh
将dirs更改为临时存储的安装点(如果使用的是卷安装):
$ mount # check mount points if you'd like
$ cd /mnt/of/ephemeral
$ du .
如果您没有使用卷安装:
$ du .
您还可以使用其他工具来获取指标:
/stats/summary
或/metrics
端点下。更多信息here。示例输出:
$ curl -k -H 'Authorization: Bearer <Redacted>' \
https://node-hostname:10250/stats/summary
{
"node": {
"nodeName": "node-hostname",
"systemContainers": [
{
"name": "kubelet",
...
"volume": [
{
"time": "2018-11-08T23:52:03Z",
"availableBytes": 1969168384,
"capacityBytes": 1969180672,
"usedBytes": 12288,
"inodesFree": 480748,
"inodes": 480757,
"inodesUsed": 9,
"name": "kube-proxy-token-pprwb"
}
],
"ephemeral-storage": {
"time": "2018-11-09T00:05:10Z",
"availableBytes": 31057477632,
"capacityBytes": 41567858688,
"inodesFree": 4873887,
"inodes": 5120000
}
...
}
同理:
$ curl -k -H 'Authorization: Bearer <Redacted>' \
https://node-hostname:10250/stats/summary
# HELP apiserver_audit_event_total Counter of audit events generated and sent to the audit backend.
# TYPE apiserver_audit_event_total counter
apiserver_audit_event_total 0
# HELP apiserver_client_certificate_expiration_seconds Distribution of the remaining lifetime on the certificate used to authenticate a request.
# TYPE apiserver_client_certificate_expiration_seconds histogram
apiserver_client_certificate_expiration_seconds_bucket{le="0"} 0
apiserver_client_certificate_expiration_seconds_bucket{le="21600"} 0
apiserver_client_certificate_expiration_seconds_bucket{le="43200"} 0
...
有关kubelet authentication/authorization的更多信息。有关K8s指标here的更多信息。