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Eric Paris
2016-03-04 12:49:17 -05:00
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@@ -32,85 +32,7 @@ Documentation for other releases can be found at
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# Kubernetes User Guide: Managing Applications: Quick start
**Table of Contents**
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- [Kubernetes User Guide: Managing Applications: Quick start](#kubernetes-user-guide-managing-applications-quick-start)
- [Launching a simple application](#launching-a-simple-application)
- [Exposing your application to the Internet](#exposing-your-application-to-the-internet)
- [Killing the application](#killing-the-application)
- [What's next?](#whats-next)
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This guide will help you get oriented to Kubernetes and running your first containers on the cluster. If you are already familiar with the docker-cli, you can also checkout the docker-cli to kubectl migration guide [here](docker-cli-to-kubectl.md).
## Launching a simple application
Once your application is packaged into a container and pushed to an image registry, you’re ready to deploy it to Kubernetes.
For example, [nginx](http://wiki.nginx.org/Main) is a popular HTTP server, with a [pre-built container on Docker hub](https://registry.hub.docker.com/_/nginx/). The [`kubectl run`](kubectl/kubectl_run.md) command below will create two nginx replicas, listening on port 80.
```console
$ kubectl run my-nginx --image=nginx --replicas=2 --port=80
CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
my-nginx my-nginx nginx run=my-nginx 2
```
You can see that they are running by:
```console
$ kubectl get po
NAME READY STATUS RESTARTS AGE
my-nginx-l8n3i 1/1 Running 0 29m
my-nginx-q7jo3 1/1 Running 0 29m
```
Kubernetes will ensure that your application keeps running, by automatically restarting containers that fail, spreading containers across nodes, and recreating containers on new nodes when nodes fail.
## Exposing your application to the Internet
Through integration with some cloud providers (for example Google Compute Engine and AWS EC2), Kubernetes enables you to request that it provision a public IP address for your application. To do this run:
```console
$ kubectl expose rc my-nginx --port=80 --type=LoadBalancer
service "my-nginx" exposed
```
To find the public IP address assigned to your application, execute:
```console
$ kubectl get svc my-nginx
NAME CLUSTER_IP EXTERNAL_IP PORT(S) SELECTOR AGE
my-nginx 10.179.240.1 25.1.2.3 80/TCP run=nginx 8d
```
You may need to wait for a minute or two for the external ip address to be provisioned.
In order to access your nginx landing page, you also have to make sure that traffic from external IPs is allowed. Do this by opening a [firewall to allow traffic on port 80](services-firewalls.md).
If you're running on AWS, Kubernetes creates an ELB for you. ELBs use host
names, not IPs, so you will have to do `kubectl describe svc my-nginx` and look
for the `LoadBalancer Ingress` host name. Traffic from external IPs is allowed
automatically.
## Killing the application
To kill the application and delete its containers and public IP address, do:
```console
$ kubectl delete rc my-nginx
replicationcontrollers/my-nginx
$ kubectl delete svc my-nginx
services/my-nginx
```
## What's next?
[Learn about how to configure common container parameters, such as commands and environment variables.](configuring-containers.md)
This file has moved to: http://kubernetes.github.io/docs/user-guide/quick-start/
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