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Merge pull request #21634 from jayunit100/spark-README

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examples/spark/README.md
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@ -38,23 +38,25 @@ Following this example, you will create a functional [Apache
Spark](http://spark.apache.org/) cluster using Kubernetes and Spark](http://spark.apache.org/) cluster using Kubernetes and
[Docker](http://docker.io). [Docker](http://docker.io).
You will setup a Spark master service and a set of You will setup a Spark master service and a set of Spark workers using Spark's [standalone mode](http://spark.apache.org/docs/latest/spark-standalone.html).
Spark workers using Spark's [standalone mode](http://spark.apache.org/docs/latest/spark-standalone.html).
For the impatient expert, jump straight to the [tl;dr](#tldr) For the impatient expert, jump straight to the [tl;dr](#tldr)
section. section.
### Sources ### Sources
The Docker images are heavily based on https://github.com/mattf/docker-spark The Docker images are heavily based on https://github.com/mattf/docker-spark.
And are curated in https://github.com/kubernetes/application-images/tree/master/spark
## Step Zero: Prerequisites ## Step Zero: Prerequisites
This example assumes you have a Kubernetes cluster installed and This example assumes
running, and that you have installed the ```kubectl``` command line
tool somewhere in your path. Please see the [getting - You have a Kubernetes cluster installed and running.
started](../../docs/getting-started-guides/) for installation - That you have installed the ```kubectl``` command line tool somewhere in your path.
instructions for your platform. - That a spark-master service which spins up will be automatically discoverable by your kube DNS impl, as 'spark-master'
For details, you can look at the Dockerfiles in the Sources section.
## Step One: Start your Master service ## Step One: Start your Master service
@ -191,7 +193,7 @@ Zeppelin needs the Master service to be running.
### Check to see if Zeppelin is running ### Check to see if Zeppelin is running
```console ```console
$ kubectl get pods -lcomponent=zeppelin $ kubectl get pods -l component=zeppelin
NAME READY STATUS RESTARTS AGE NAME READY STATUS RESTARTS AGE
zeppelin-controller-ja09s 1/1 Running 0 53s zeppelin-controller-ja09s 1/1 Running 0 53s
``` ```