Write page templates and canonical examples.
Conflicts: _data/tasks.yml _data/tutorials.yml docs/tasks/access-kubernetes-api/http-proxy-access-api.md docs/tasks/index.md docs/tutorials/index.md
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---
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---
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{% capture overview %}
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This page shows how to run an application using a Kubernetes Deployment object.
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{% endcapture %}
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{% capture objectives %}
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* Create an nginx deployment.
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* Use kubectl to list information about the deployment.
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* Update the deployment.
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{% endcapture %}
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{% capture prerequisites %}
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* To do this tutorial, you need a Kubernetes cluster, including a running
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Kubernetes API server. You can use an existing cluster, or you can create a
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new cluster. One way to create a new cluster is to use
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[Minikube](/docs/getting-started-guides/minikube).
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* You also need to have `kubectl` installed on your local machine, and `kubectl`
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must be configured to communicate with your Kubernetes API server. This
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configuration is done automatically if you use Minikube.
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{% endcapture %}
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{% capture lessoncontent %}
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### Creating and exploring an nginx deployment
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You can run an application by creating a Kubernetes Deployment object, and you
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can describe a Deployment in a YAML file. For example, this YAML file describes
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a Deployment that runs the nginx:1.7.9 Docker image:
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{% include code.html language="yaml" file="deployment.yaml" ghlink="/docs/tutorials/stateless-application/deployment.yaml" %}
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1. Create a Deployment based on the YAML file:
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export REPO=https://raw.githubusercontent.com/kubernetes/kubernetes.github.io/master
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kubectl create -f $REPO/docs/tutorials/stateless-application/deployment.yaml
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1. Display information about the Deployment:
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kubectl describe deployment nginx-deployment
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user@computer:~/kubernetes.github.io$ kubectl describe deployment nginx-deployment
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Name: nginx-deployment
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Namespace: default
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CreationTimestamp: Tue, 30 Aug 2016 18:11:37 -0700
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Labels: app=nginx
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Selector: app=nginx
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Replicas: 2 updated | 2 total | 2 available | 0 unavailable
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StrategyType: RollingUpdate
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MinReadySeconds: 0
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RollingUpdateStrategy: 1 max unavailable, 1 max surge
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OldReplicaSets: <none>
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NewReplicaSet: nginx-deployment-1771418926 (2/2 replicas created)
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No events.
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1. List the pods created by the deployment:
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kubectl get pods -l app=nginx
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NAME READY STATUS RESTARTS AGE
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nginx-deployment-1771418926-7o5ns 1/1 Running 0 16h
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nginx-deployment-1771418926-r18az 1/1 Running 0 16h
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1. Display information about a pod:
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kubectl display pod <pod-name>
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where `<pod-name>` is the name of one of your pods.
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### Updating the deployment
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You can update the deployment by applying a new YAML file. This YAML file
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specifies that the deployment should be updated to use nginx 1.8.
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{% include code.html language="yaml" file="deployment-update.yaml" ghlink="/docs/tutorials/stateless-application/deployment-update.yaml" %}
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1. Apply the new YAML file:
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kubectl apply -f $REPO/docs/tutorials/stateless-application/deployment-update.yaml
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1. Watch the deployment create pods with new names and delete the old pods:
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kubectl get pods -l app=nginx
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### Deleting a deployment
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Delete the deployment by name:
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kubectl delete deployment nginx-deployment
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{% endcapture %}
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{% capture whatsnext %}
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* Learn more about [Deployment objects](/docs/user-guide/deployments/).
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* Learn more about [Deploying applications](/docs/user-guide/deploying-applications/)
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{% endcapture %}
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{% include templates/tutorial.md %}
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