---
title: Assign Extended Resources to a Container
---

{% capture overview %}

This page shows how to assign extended resources to a Container.

{% include feature-state-stable.md %}

{% endcapture %}


{% capture prerequisites %}

{% include task-tutorial-prereqs.md %}

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.

{% endcapture %}


{% capture 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:

{% include code.html language="yaml" file="extended-resource-pod.yaml" ghlink="/docs/tasks/configure-pod-container/extended-resource-pod.yaml" %}

In the configuration file, you can see that the Container requests 3 dongles.

Create a Pod:

```shell
kubectl create -f https://k8s.io/docs/tasks/configure-pod-container/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
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.

{% include code.html language="yaml" file="extended-resource-pod-2.yaml" ghlink="/docs/tasks/configure-pod-container/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 create -f https://k8s.io/docs/tasks/configure-pod-container/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 Pod that you created for this exercise:

```shell
kubectl delete pod extended-resource-demo-2
```

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{% capture 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/)

{% endcapture %}


{% include templates/task.md %}