7.5.2.2. 使用 CLI 安装 Cluster Resource Override Operator
您可以使用 OpenShift Container Platform CLI 来安装 Cluster Resource Override Operator，以帮助控制集群中的过量使用。
先决条件
-
如果容器上未设置限值，Cluster Resourceoverride Operator 将没有作用。您必须使用一个
LimitRange对象为项目指定默认限值，或在Podspec 中配置要应用的覆盖的限制。
流程
使用 CLI 安装 Cluster Resource Override Operator：
为 Cluster Resource Override Operator 创建命名空间：
为 Cluster Resource Override Operator 创建一个
Namespace空间对象 YAML 文件（如cro-namespace.yaml）:apiVersion: v1 kind: Namespace metadata: name: clusterresourceoverride-operator
创建命名空间：
$ oc create -f <file-name>.yaml
例如：
$ oc create -f cro-namespace.yaml
创建一个 Operator 组：
为 Cluster Resource Override Operator 创建一个
OperatorGroup对象 YAML 文件（如 cro-og.yaml）:apiVersion: operators.coreos.com/v1 kind: OperatorGroup metadata: name: clusterresourceoverride-operator namespace: clusterresourceoverride-operator spec: targetNamespaces: - clusterresourceoverride-operator创建 Operator 组：
$ oc create -f <file-name>.yaml
例如：
$ oc create -f cro-og.yaml
创建一个订阅：
为 Cluster Resourceoverride Operator 创建一个
Subscription对象 YAML 文件（如 cro-sub.yaml):apiVersion: operators.coreos.com/v1alpha1 kind: Subscription metadata: name: clusterresourceoverride namespace: clusterresourceoverride-operator spec: channel: "4.8" name: clusterresourceoverride source: redhat-operators sourceNamespace: openshift-marketplace
创建订阅：
$ oc create -f <file-name>.yaml
例如：
$ oc create -f cro-sub.yaml
在
clusterresourceoverride-operator命名空间中创建ClusterResourceOverride自定义资源（CR）对象：进入
clusterresourceoverride-operator命名空间。$ oc project clusterresourceoverride-operator
为 Cluster Resourceoverride Operator 创建
ClusterResourceOverride对象 YAML 文件（如 cro-cr.yaml):apiVersion: operator.autoscaling.openshift.io/v1 kind: ClusterResourceOverride metadata: name: cluster 1 spec: podResourceOverride: spec: memoryRequestToLimitPercent: 50 2 cpuRequestToLimitPercent: 25 3 limitCPUToMemoryPercent: 200 4创建
ClusterResourceOverride对象：$ oc create -f <file-name>.yaml
例如：
$ oc create -f cro-cr.yaml
通过检查集群自定义资源的状态来验证准入 Webhook 的当前状态。
$ oc get clusterresourceoverride cluster -n clusterresourceoverride-operator -o yaml
当 webhook 被调用时，
mutatingWebhookConfigurationRef项会出现。输出示例
apiVersion: operator.autoscaling.openshift.io/v1 kind: ClusterResourceOverride metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"operator.autoscaling.openshift.io/v1","kind":"ClusterResourceOverride","metadata":{"annotations":{},"name":"cluster"},"spec":{"podResourceOverride":{"spec":{"cpuRequestToLimitPercent":25,"limitCPUToMemoryPercent":200,"memoryRequestToLimitPercent":50}}}} creationTimestamp: "2019-12-18T22:35:02Z" generation: 1 name: cluster resourceVersion: "127622" selfLink: /apis/operator.autoscaling.openshift.io/v1/clusterresourceoverrides/cluster uid: 978fc959-1717-4bd1-97d0-ae00ee111e8d spec: podResourceOverride: spec: cpuRequestToLimitPercent: 25 limitCPUToMemoryPercent: 200 memoryRequestToLimitPercent: 50 status: .... mutatingWebhookConfigurationRef: 1 apiVersion: admissionregistration.k8s.io/v1beta1 kind: MutatingWebhookConfiguration name: clusterresourceoverrides.admission.autoscaling.openshift.io resourceVersion: "127621" uid: 98b3b8ae-d5ce-462b-8ab5-a729ea8f38f3 ....- 1
- 引用
ClusterResourceOverride准入Webhook。
