Copy tasks/configure-pod-container/extended-resource.md from en/ directory.
This commit is contained in:
@@ -0,0 +1,145 @@
|
||||
---
|
||||
title: Assign Extended Resources to a Container
|
||||
content_type: task
|
||||
weight: 40
|
||||
---
|
||||
|
||||
<!-- overview -->
|
||||
|
||||
{{< feature-state state="stable" >}}
|
||||
|
||||
This page shows how to assign extended resources to a Container.
|
||||
|
||||
|
||||
|
||||
|
||||
## {{% heading "prerequisites" %}}
|
||||
|
||||
|
||||
{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
|
||||
|
||||
Before you do this exercise, do the exercise in
|
||||
[Advertise Extended Resources for a Node](/docs/tasks/administer-cluster/extended-resource-node/).
|
||||
That will configure one of your Nodes to advertise a dongle resource.
|
||||
|
||||
|
||||
|
||||
|
||||
<!-- steps -->
|
||||
|
||||
## Assign an extended resource to a Pod
|
||||
|
||||
To request an extended resource, include the `resources:requests` field in your
|
||||
Container manifest. Extended resources are fully qualified with any domain outside of
|
||||
`*.kubernetes.io/`. Valid extended resource names have the form `example.com/foo` where
|
||||
`example.com` is replaced with your organization's domain and `foo` is a
|
||||
descriptive resource name.
|
||||
|
||||
Here is the configuration file for a Pod that has one Container:
|
||||
|
||||
{{< codenew file="pods/resource/extended-resource-pod.yaml" >}}
|
||||
|
||||
In the configuration file, you can see that the Container requests 3 dongles.
|
||||
|
||||
Create a Pod:
|
||||
|
||||
```shell
|
||||
kubectl apply -f https://k8s.io/examples/pods/resource/extended-resource-pod.yaml
|
||||
```
|
||||
|
||||
Verify that the Pod is running:
|
||||
|
||||
```shell
|
||||
kubectl get pod extended-resource-demo
|
||||
```
|
||||
|
||||
Describe the Pod:
|
||||
|
||||
```shell
|
||||
kubectl describe pod extended-resource-demo
|
||||
```
|
||||
|
||||
The output shows dongle requests:
|
||||
|
||||
```yaml
|
||||
Limits:
|
||||
example.com/dongle: 3
|
||||
Requests:
|
||||
example.com/dongle: 3
|
||||
```
|
||||
|
||||
## Attempt to create a second Pod
|
||||
|
||||
Here is the configuration file for a Pod that has one Container. The Container requests
|
||||
two dongles.
|
||||
|
||||
{{< codenew file="pods/resource/extended-resource-pod-2.yaml" >}}
|
||||
|
||||
Kubernetes will not be able to satisfy the request for two dongles, because the first Pod
|
||||
used three of the four available dongles.
|
||||
|
||||
Attempt to create a Pod:
|
||||
|
||||
```shell
|
||||
kubectl apply -f https://k8s.io/examples/pods/resource/extended-resource-pod-2.yaml
|
||||
```
|
||||
|
||||
Describe the Pod
|
||||
|
||||
```shell
|
||||
kubectl describe pod extended-resource-demo-2
|
||||
```
|
||||
|
||||
The output shows that the Pod cannot be scheduled, because there is no Node that has
|
||||
2 dongles available:
|
||||
|
||||
|
||||
```
|
||||
Conditions:
|
||||
Type Status
|
||||
PodScheduled False
|
||||
...
|
||||
Events:
|
||||
...
|
||||
... Warning FailedScheduling pod (extended-resource-demo-2) failed to fit in any node
|
||||
fit failure summary on nodes : Insufficient example.com/dongle (1)
|
||||
```
|
||||
|
||||
View the Pod status:
|
||||
|
||||
```shell
|
||||
kubectl get pod extended-resource-demo-2
|
||||
```
|
||||
|
||||
The output shows that the Pod was created, but not scheduled to run on a Node.
|
||||
It has a status of Pending:
|
||||
|
||||
```yaml
|
||||
NAME READY STATUS RESTARTS AGE
|
||||
extended-resource-demo-2 0/1 Pending 0 6m
|
||||
```
|
||||
|
||||
## Clean up
|
||||
|
||||
Delete the Pods that you created for this exercise:
|
||||
|
||||
```shell
|
||||
kubectl delete pod extended-resource-demo
|
||||
kubectl delete pod extended-resource-demo-2
|
||||
```
|
||||
|
||||
|
||||
|
||||
## {{% heading "whatsnext" %}}
|
||||
|
||||
|
||||
### For application developers
|
||||
|
||||
* [Assign Memory Resources to Containers and Pods](/docs/tasks/configure-pod-container/assign-memory-resource/)
|
||||
* [Assign CPU Resources to Containers and Pods](/docs/tasks/configure-pod-container/assign-cpu-resource/)
|
||||
|
||||
### For cluster administrators
|
||||
|
||||
* [Advertise Extended Resources for a Node](/docs/tasks/administer-cluster/extended-resource-node/)
|
||||
|
||||
|
||||
Reference in New Issue
Block a user