7.5.2.2. 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

apiVersion: v1
kind: Namespace
metadata:
  name: clusterresourceoverride-operator

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创建命名空间：
```
oc create -f <file-name>.yaml
```
```
$ oc create -f <file-name>.yaml
```
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例如：
```
oc create -f cro-namespace.yaml
```
```
$ oc create -f cro-namespace.yaml
```
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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

apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: clusterresourceoverride-operator
  namespace: clusterresourceoverride-operator
spec:
  targetNamespaces:
    - clusterresourceoverride-operator

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创建 Operator 组：
```
oc create -f <file-name>.yaml
```
```
$ oc create -f <file-name>.yaml
```
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例如：
```
oc create -f cro-og.yaml
```
```
$ oc create -f cro-og.yaml
```
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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

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

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创建订阅：
```
oc create -f <file-name>.yaml
```
```
$ oc create -f <file-name>.yaml
```
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例如：
```
oc create -f cro-sub.yaml
```
```
$ oc create -f cro-sub.yaml
```
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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
```
```
$ oc project clusterresourceoverride-operator
```
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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 
spec:
  podResourceOverride:
    spec:
      memoryRequestToLimitPercent: 50 
      cpuRequestToLimitPercent: 25 
      limitCPUToMemoryPercent: 200 
```
```
apiVersion: operator.autoscaling.openshift.io/v1
kind: ClusterResourceOverride
metadata:
    name: cluster 
```
1
```
spec:
  podResourceOverride:
    spec:
      memoryRequestToLimitPercent: 50 
```
2
```
      cpuRequestToLimitPercent: 25 
```
3
```
      limitCPUToMemoryPercent: 200 
```
4
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1
名称必须是 cluster。
2
可选。指定在 1-100 之间覆盖容器内存限值的百分比（如果使用的话）。默认值为 50.
3
可选。指定在 1-100 之间覆盖容器 CPU 限值的百分比（如果使用的话）。默认值为 25。
4
可选。如果使用，请指定覆盖容器内存限值的百分比。以 100% 扩展 1Gi RAM，等于 1 个 CPU 内核。这会在覆盖 CPU 请求前进行处理（如果已配置）。默认值为 200。
创建 ClusterResourceOverride 对象：
```
oc create -f <file-name>.yaml
```
```
$ oc create -f <file-name>.yaml
```
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例如：
```
oc create -f cro-cr.yaml
```
```
$ oc create -f cro-cr.yaml
```
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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

$ oc get clusterresourceoverride cluster -n clusterresourceoverride-operator -o yaml

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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: 
      apiVersion: admissionregistration.k8s.io/v1beta1
      kind: MutatingWebhookConfiguration
      name: clusterresourceoverrides.admission.autoscaling.openshift.io
      resourceVersion: "127621"
      uid: 98b3b8ae-d5ce-462b-8ab5-a729ea8f38f3

....

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

....

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1: 引用 ClusterResourceOverride 准入Webhook。

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