wangyamei
138 lines
2.9 KiB
Markdown
138 lines
2.9 KiB
Markdown
---
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title: 给容器分配非透明整型资源
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---
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{% capture overview %}
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本页展示了如何给容器分配非透明整型资源。
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{% include feature-state-alpha.md %}
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{% endcapture %}
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{% capture prerequisites %}
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{% include task-tutorial-prereqs.md %}
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在做这个练习之前，请在[给节点配置非透明整型资源](/docs/tasks/administer-cluster/opaque-integer-resource-node/)文档中进行练习，
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该文档介绍了在一个节点上配置dongle资源。
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{% endcapture %}
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{% capture steps %}
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## 给Pod分配非透明整型资源
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为了请求一个非透明整型资源，需要在容器配置文件中包含`resources:requests`字段。
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非透明整型资源类型前缀是`pod.alpha.kubernetes.io/opaque-int-resource-`。
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下面是含有一个容器的Pod的配置文件:
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{% include code.html language="yaml" file="oir-pod.yaml" ghlink="/cn/docs/tasks/configure-pod-container/oir-pod.yaml" %}
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在配置文件中，可以看到容器请求了3个dongles资源。
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创建Pod:
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```shell
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kubectl create -f https://k8s.io/docs/tasks/configure-pod-container/oir-pod.yaml
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```
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验证Pod是否正在运行:
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```shell
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kubectl get pod oir-demo
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```
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查询Pod的状态:
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```shell
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kubectl describe pod oir-demo
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```
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输出显示了dongle请求:
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```yaml
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Requests:
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pod.alpha.kubernetes.io/opaque-int-resource-dongle: 3
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```
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## 尝试创建第二个Pod
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下面是含有一个容器的Pod的配置文件。该容器请求了两个dongles资源。
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{% include code.html language="yaml" file="oir-pod-2.yaml" ghlink="/docs/tasks/configure-pod-container/oir-pod-2.yaml" %}
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Kubernetes无法再满足两个dongles的请求，因为第一个Pod已经使用了四个可用dongles中的三个。
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尝试创建Pod:
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```shell
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kubectl create -f https://k8s.io/docs/tasks/configure-pod-container/oir-pod-2.yaml
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```
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查询Pod的状态
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```shell
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kubectl describe pod oir-demo-2
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```
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输出显示该Pod无法被调度，因为没有节点有两个可用的dongles资源:
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```
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Conditions:
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Type Status
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PodScheduled False
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...
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Events:
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...
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... Warning FailedScheduling pod (oir-demo-2) failed to fit in any node
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fit failure summary on nodes : Insufficient pod.alpha.kubernetes.io/opaque-int-resource-dongle (1)
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```
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查看Pod的状态:
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```shell
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kubectl get pod oir-demo-2
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```
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输出显示Pod已创建，但是没有被调度并运行在节点上。
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它的状态为Pending:
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```yaml
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NAME READY STATUS RESTARTS AGE
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oir-demo-2 0/1 Pending 0 6m
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```
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## 删除
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删除本练习中创建的Pod:
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```shell
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kubectl delete pod oir-demo
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```
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{% endcapture %}
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{% capture whatsnext %}
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### 对于应用开发者
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* [分配内存资源](/docs/tasks/configure-pod-container/assign-memory-resource/)
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* [分配CPU资源](/docs/tasks/configure-pod-container/assign-cpu-resource/)
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### 对于集群管理员
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* [给节点配置非透明整型资源](/docs/tasks/administer-cluster/opaque-integer-resource-node/)
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{% endcapture %}
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{% include templates/task.md %}
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