180 lines
5.7 KiB
Markdown
180 lines
5.7 KiB
Markdown
---
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title: 配置命名空间下 Pod 配额
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content_type: task
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weight: 60
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---
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<!-- overview -->
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<!--
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This page shows how to set a quota for the total number of Pods that can run
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in a namespace. You specify quotas in a
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[ResourceQuota](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#resourcequota-v1-core)
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object.
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-->
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本文主要描述如何配置一个命名空间下可运行的 Pod 个数配额。
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你可以使用
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[ResourceQuota](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#resourcequota-v1-core)
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对象来配置配额。
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## {{% heading "prerequisites" %}}
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{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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<!-- steps -->
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<!--
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## Create a namespace
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Create a namespace so that the resources you create in this exercise are
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isolated from the rest of your cluster.
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-->
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## 创建一个命名空间
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首先创建一个命名空间，这样可以将本次操作中创建的资源与集群其他资源隔离开来。
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```shell
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kubectl create namespace quota-pod-example
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```
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<!--
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## Create a ResourceQuota
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Here is the configuration file for a ResourceQuota object:
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-->
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## 创建 ResourceQuota
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下面是一个 ResourceQuota 的配置文件：
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{{< codenew file="admin/resource/quota-pod.yaml" >}}
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<!-- 创建 ResourceQuota: -->
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创建这个 ResourceQuota：
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```shell
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kubectl apply -f https://k8s.io/examples/admin/resource/quota-pod.yaml --namespace=quota-pod-example
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```
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<!--
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View detailed information about the ResourceQuota:
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-->
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查看资源配额的详细信息：
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```shell
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kubectl get resourcequota pod-demo --namespace=quota-pod-example --output=yaml
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```
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<!--
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The output shows that the namespace has a quota of two Pods, and that currently there are
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no Pods; that is, none of the quota is used.
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-->
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从输出的信息我们可以看到，该命名空间下 Pod 的配额是 2 个，目前创建的 Pod 数为 0，
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配额使用率为 0。
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```yaml
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spec:
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hard:
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pods: "2"
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status:
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hard:
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pods: "2"
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used:
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pods: "0"
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```
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<!--
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Here is the configuration file for a Deployment:
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-->
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下面是一个 Deployment 的配置文件：
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{{< codenew file="admin/resource/quota-pod-deployment.yaml" >}}
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<!--
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In the configuration file, `replicas: 3` tells Kubernetes to attempt to create three Pods, all running the same application.
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Create the Deployment:
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-->
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在配置文件中，`replicas: 3` 告诉 Kubernetes 尝试创建三个 Pods，且运行相同的应用。
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创建这个 Deployment：
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```shell
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kubectl apply -f https://k8s.io/examples/admin/resource/quota-pod-deployment.yaml --namespace=quota-pod-example
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```
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<!--
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View detailed information about the Deployment:
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-->
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查看 Deployment 的详细信息：
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```shell
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kubectl get deployment pod-quota-demo --namespace=quota-pod-example --output=yaml
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```
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<!--
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The output shows that even though the Deployment specifies three replicas, only two
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Pods were created because of the quota.
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-->
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从输出的信息我们可以看到，尽管尝试创建三个 Pod，但是由于配额的限制，只有两个 Pod 能被成功创建。
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```yaml
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spec:
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...
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replicas: 3
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...
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status:
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availableReplicas: 2
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...
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lastUpdateTime: 2017-07-07T20:57:05Z
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message: 'unable to create pods: pods "pod-quota-demo-1650323038-" is forbidden:
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exceeded quota: pod-demo, requested: pods=1, used: pods=2, limited: pods=2'
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```
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<!--
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## Clean up
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Delete your namespace:
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-->
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## 清理
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删除命名空间：
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```shell
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kubectl delete namespace quota-pod-example
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```
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## {{% heading "whatsnext" %}}
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<!--
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### For cluster administrators
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* [Configure Default Memory Requests and Limits for a Namespace](/docs/tasks/administer-cluster/manage-resources/memory-default-namespace/)
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* [Configure Default CPU Requests and Limits for a Namespace](/docs/tasks/administer-cluster/manage-resources/cpu-default-namespace/)
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* [Configure Minimum and Maximum Memory Constraints for a Namespace](/docs/tasks/administer-cluster/manage-resources/memory-constraint-namespace/)
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* [Configure Minimum and Maximum CPU Constraints for a Namespace](/docs/tasks/administer-cluster/manage-resources/cpu-constraint-namespace/)
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* [Configure Memory and CPU Quotas for a Namespace](/docs/tasks/administer-cluster/manage-resources/quota-memory-cpu-namespace/)
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* [Configure Quotas for API Objects](/docs/tasks/administer-cluster/quota-api-object/)
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-->
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### 集群管理人员参考
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* [为命名空间配置默认的内存请求和限制](/zh/docs/tasks/administer-cluster/manage-resources/memory-default-namespace/)
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* [为命名空间配置默认的的 CPU 请求和限制](/zh/docs/tasks/administer-cluster/manage-resources/cpu-default-namespace/)
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* [为命名空间配置内存的最小值和最大值约束](/zh/docs/tasks/administer-cluster/manage-resources/memory-constraint-namespace/)
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* [为命名空间配置 CPU 的最小值和最大值约束](/zh/docs/tasks/administer-cluster/manage-resources/cpu-constraint-namespace/)
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* [为命名空间配置内存和 CPU 配额](/zh/docs/tasks/administer-cluster/manage-resources/quota-memory-cpu-namespace/)
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* [为 API 对象的设置配额](/zh/docs/tasks/administer-cluster/quota-api-object/)
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<!--
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### For app developers
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* [Assign Memory Resources to Containers and Pods](/docs/tasks/configure-pod-container/assign-memory-resource/)
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* [Assign CPU Resources to Containers and Pods](/docs/tasks/configure-pod-container/assign-cpu-resource/)
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* [Configure Quality of Service for Pods](/docs/tasks/configure-pod-container/quality-service-pod/)
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-->
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### 应用开发人员参考
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* [为容器和 Pod 分配内存资源](/zh/docs/tasks/configure-pod-container/assign-memory-resource/)
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* [给容器和 Pod 分配 CPU 资源](/zh/docs/tasks/configure-pod-container/assign-cpu-resource/)
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* [配置 Pod 的服务质量](/zh/docs/tasks/configure-pod-container/quality-service-pod/)
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