k8s资源之ResourceQuota

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资源限制：

•kubernetes提供了两种资源限制的方式：ResourceQuota 和LimitRange。

其中ResourceQuota 是针对namespace做的资源限制，而LimitRange是针对namespace中的每个组件做的资源限制。

ResourceQuota：

•配置一个namespace可以使用的资源量

•资源配额能够对计算资源（CPU和内存）、存储资源、以及对资源对象的数量进行管理。

常用资源类型：

•计算资源配额

•存储资源配额

•对象数量配额

计算资源配额：

存储资源配额：

•requests.storage

•persistentvolumeclaims

•<storage-class-name>.storageclass.storage.k8s.io/requests.storage

•<storage-class-name>.storageclass.storage.k8s.io/persistentvolumeclaims

•requests.ephemeral-storage

•limits.ephemeral-storage

对象数量配额：

Quota Scopes：

示例：

[root@master01 compute-resources]# cat compute-resources.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: compute-resources
spec:
  hard:
    requests.cpu: "0.1"
    requests.memory: 100Mi
    limits.cpu: "0.2"
    limits.memory: 200Mi

[root@master01 storage]# cat storage.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: storage-resources
spec:
  hard:
    requests.storage: 200Mi
    requests.ephemeral-storage: 1Mi
    limits.ephemeral-storage: 1Mi
    nfs-sc.storageclass.storage.k8s.io/requests.storage: 100Mi
    nfs-sc.storageclass.storage.k8s.io/persistentvolumeclaims: 1
    persistentvolumeclaims: 2

[root@master01 object-counts]# cat object-counts.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: object-counts
spec:
  hard:
    persistentvolumeclaims: 1
    services.loadbalancers: 1
    services.nodeports: 1
    configmaps: 1
    pods: 1
    resourcequotas: 1
    services: 1
    secrets: 1

[root@master01 best-effort]# cat best-effort.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: best-effort
spec:
  hard:
    pods: "2"
  scopes:
  - BestEffort

[root@master01 not-best-effort]# cat not-best-effort.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: not-best-effort
spec:
  hard:
    pods: "2"
    requests.cpu: "0.1"
    requests.memory: 100Mi
    limits.cpu: "0.2"
    limits.memory: 200Mi
  scopes:
  - NotBestEffort

[root@master01 termination]# cat termination.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: termination
spec:
  hard:
    requests.cpu: "0.1"
    requests.memory: 100Mi
    limits.cpu: "0.2"
    limits.memory: 200Mi
  scopes:
  - Terminating

[root@master01 nottermination]# cat notterminating.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: termination
spec:
  hard:
    requests.cpu: "0.1"
    requests.memory: 100Mi
    limits.cpu: "0.2"
    limits.memory: 200Mi
  scopes:
  - NotTerminating

[root@master01 prioity-class]# cat prioity-class.yaml 
apiVersion: v1
kind: ResourceQuota
metadata:
  name: priority-high
spec:
    hard:
      cpu: "0.1"
      memory: 100Mi
      pods: "2"
    scopeSelector:
      matchExpressions:
      - operator : In
        scopeName: PriorityClass
        values: ["high"]