|NO.Z.00231|——————————|CloudNative|——|KuberNetes&細粒度許可權控制.V15|------------------------------------------------|准入控制.v01|limitranger&resourceQuota Example實驗|
阿新 • • 發佈:2022-03-31
[CloudNative:KuberNetes&細粒度許可權控制.V15] [Applications.KuberNetes] [|DevOps|k8s|細粒度許可權控制|准入控制|kubernetes服務質量QoS|使用PodPreset預配置容器時區|]
一、准入控制
### --- 准入控制 ~~~ # 請注意: ~~~ k8s 1.20版本已經刪除PodPreset功能,低於1.20版本正常使用 ~~~ # 准入控制: ~~~ 就是在建立資源經過身份驗證之後,kube-apiserver在資料寫入etcd之前做一次攔截, ~~~ 然後對資源進行更改、判斷正確性等操作。
### --- LimitRanger的default的用法
~~~ # 官方地址:
~~~ https://kubernetes.io/docs/concepts/policy/limit-range/
二、limitranger實驗LimitRanger: limits: - default: # 沒有配置limit或者request的時候設定的預設值,limits cpu: 50m memory: 50Mi defaultRequest: # Request限制 cpu: 10m memory: 20Mi type: Container max: # Limit配置不能超過max設定的值 cpu: memory: min: # Request的值不能低於min的值 cpu: memory: - max: # 指定Pod裡面所有的Container加在一起的CPU和記憶體不能超過這個值,limit cpu: 50m memory: 50Mi type: Pod min: request
三、resourceQuota Example:[root@k8s-master01 ~]# vim limitranger.yaml apiVersion: v1 kind: LimitRange metadata: name: limits-test spec: limits: - max: cpu: "4" memory: 2Gi min: cpu: 200m memory: 6Mi maxLimitRequestRatio: cpu: 3 memory: 2 type: Pod - default: cpu: 300m memory: 200Mi defaultRequest: cpu: 200m memory: 100Mi max: cpu: "2" memory: 1Gi min: cpu: 100m memory: 3Mi maxLimitRequestRatio: cpu: 5 memory: 4 type: Container [root@k8s-master01 ~]# kubectl create -f limitranger.yaml -n XXXX
### --- resourceQuota Example:
~~~ # 官網地址:
~~~ https://kubernetes.io/docs/concepts/policy/resource-quotas/
[root@k8s-master01 ~]# cat resourcequota.yaml
apiVersion: v1
kind: ResourceQuota
metadata:
name: resource-test
labels:
app: resourcequota
spec:
hard:
pods: 50
requests.cpu: 0.5
requests.memory: 512Mi
limits.cpu: 5
limits.memory: 16Gi
configmaps: 20
persistentvolumeclaims: 20
replicationcontrollers: 20
secrets: 20
services: 50
[root@k8s-master01 ~]# kubectl create -f resourcequota.yaml -n NAMESPACE-SELECT
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