John Mulhausen
108 lines
2.5 KiB
Markdown
108 lines
2.5 KiB
Markdown
---
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layout: docwithnav
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title: "Testing your Kubernetes cluster."
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---
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<!-- BEGIN MUNGE: UNVERSIONED_WARNING -->
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<!-- END MUNGE: UNVERSIONED_WARNING -->
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## Testing your Kubernetes cluster.
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To validate that your node(s) have been added, run:
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{% highlight sh %}
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{% raw %}
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kubectl get nodes
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{% endraw %}
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{% endhighlight %}
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That should show something like:
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{% highlight console %}
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{% raw %}
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NAME LABELS STATUS
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10.240.99.26 kubernetes.io/hostname=10.240.99.26 Ready
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127.0.0.1 kubernetes.io/hostname=127.0.0.1 Ready
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{% endraw %}
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{% endhighlight %}
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If the status of any node is `Unknown` or `NotReady` your cluster is broken, double check that all containers are running properly, and if all else fails, contact us on [Slack](../../troubleshooting.html#slack).
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### Run an application
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{% highlight sh %}
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{% raw %}
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kubectl -s http://localhost:8080 run nginx --image=nginx --port=80
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{% endraw %}
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{% endhighlight %}
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now run `docker ps` you should see nginx running. You may need to wait a few minutes for the image to get pulled.
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### Expose it as a service
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{% highlight sh %}
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{% raw %}
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kubectl expose rc nginx --port=80
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{% endraw %}
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{% endhighlight %}
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Run the following command to obtain the IP of this service we just created. There are two IPs, the first one is internal (CLUSTER_IP), and the second one is the external load-balanced IP.
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{% highlight sh %}
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{% raw %}
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kubectl get svc nginx
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{% endraw %}
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{% endhighlight %}
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Alternatively, you can obtain only the first IP (CLUSTER_IP) by running:
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{% highlight sh %}
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{% raw %}
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kubectl get svc nginx --template={{.spec.clusterIP}}
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{% endraw %}
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{% endhighlight %}
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Hit the webserver with the first IP (CLUSTER_IP):
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{% highlight sh %}
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{% raw %}
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curl <insert-cluster-ip-here>
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{% endraw %}
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{% endhighlight %}
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Note that you will need run this curl command on your boot2docker VM if you are running on OS X.
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### Scaling
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Now try to scale up the nginx you created before:
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{% highlight sh %}
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{% raw %}
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kubectl scale rc nginx --replicas=3
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{% endraw %}
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{% endhighlight %}
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And list the pods
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{% highlight sh %}
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{% raw %}
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kubectl get pods
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{% endraw %}
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{% endhighlight %}
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You should see pods landing on the newly added machine.
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<!-- BEGIN MUNGE: IS_VERSIONED -->
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<!-- TAG IS_VERSIONED -->
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<!-- END MUNGE: IS_VERSIONED -->
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<!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
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[]()
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<!-- END MUNGE: GENERATED_ANALYTICS -->
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