[SPARK-12351][MESOS] Add documentation about submitting Spark with mesos cluster mode.

Adding more documentation about submitting jobs with mesos cluster mode.

Author: Timothy Chen <tnachen@gmail.com>

Closes #10086 from tnachen/mesos_supervise_docs.

docs/running-on-mesos.md

@@ -150,14 +150,30 @@ it does not need to be redundantly passed in as a system property.
 Spark on Mesos also supports cluster mode, where the driver is launched in the cluster and the client
 can find the results of the driver from the Mesos Web UI.
 
-To use cluster mode, you must start the MesosClusterDispatcher in your cluster via the `sbin/start-mesos-dispatcher.sh` script,
-passing in the Mesos master url (e.g: mesos://host:5050).
+To use cluster mode, you must start the `MesosClusterDispatcher` in your cluster via the `sbin/start-mesos-dispatcher.sh` script,
+passing in the Mesos master URL (e.g: mesos://host:5050). This starts the `MesosClusterDispatcher` as a daemon running on the host.
 
-From the client, you can submit a job to Mesos cluster by running `spark-submit` and specifying the master url
-to the url of the MesosClusterDispatcher (e.g: mesos://dispatcher:7077). You can view driver statuses on the
+If you like to run the `MesosClusterDispatcher` with Marathon, you need to run the `MesosClusterDispatcher` in the foreground (i.e: `bin/spark-class org.apache.spark.deploy.mesos.MesosClusterDispatcher`).
+
+From the client, you can submit a job to Mesos cluster by running `spark-submit` and specifying the master URL
+to the URL of the `MesosClusterDispatcher` (e.g: mesos://dispatcher:7077). You can view driver statuses on the
 Spark cluster Web UI.
 
-Note that jars or python files that are passed to spark-submit should be URIs reachable by Mesos slaves.
+For example:
+{% highlight bash %}
+./bin/spark-submit \
+  --class org.apache.spark.examples.SparkPi \
+  --master mesos://207.184.161.138:7077 \
+  --deploy-mode cluster
+  --supervise
+  --executor-memory 20G \
+  --total-executor-cores 100 \
+  http://path/to/examples.jar \
+  1000
+{% endhighlight %}
+
+
+Note that jars or python files that are passed to spark-submit should be URIs reachable by Mesos slaves, as the Spark driver doesn't automatically upload local jars.
 
 # Mesos Run Modes
 

docs/submitting-applications.md

@@ -115,6 +115,18 @@ export HADOOP_CONF_DIR=XXX
   --master spark://207.184.161.138:7077 \
   examples/src/main/python/pi.py \
   1000
+
+# Run on a Mesos cluster in cluster deploy mode with supervise
+./bin/spark-submit \
+  --class org.apache.spark.examples.SparkPi \
+  --master mesos://207.184.161.138:7077 \
+  --deploy-mode cluster
+  --supervise
+  --executor-memory 20G \
+  --total-executor-cores 100 \
+  http://path/to/examples.jar \
+  1000
+
 {% endhighlight %}
 
 # Master URLs
@@ -132,9 +144,10 @@ The master URL passed to Spark can be in one of the following formats:
 <tr><td> <code>mesos://HOST:PORT</code> </td><td> Connect to the given <a href="running-on-mesos.html">Mesos</a> cluster.
         The port must be whichever one your is configured to use, which is 5050 by default.
         Or, for a Mesos cluster using ZooKeeper, use <code>mesos://zk://...</code>.
+        To submit with <code>--deploy-mode cluster</code>, the HOST:PORT should be configured to connect to the <a href="running-on-mesos.html#cluster-mode">MesosClusterDispatcher</a>.
 </td></tr>
 <tr><td> <code>yarn</code> </td><td> Connect to a <a href="running-on-yarn.html"> YARN </a> cluster in
-        <code>client</code> or <code>cluster</code> mode depending on the value of <code>--deploy-mode</code>. 
+        <code>client</code> or <code>cluster</code> mode depending on the value of <code>--deploy-mode</code>.
         The cluster location will be found based on the <code>HADOOP_CONF_DIR</code> or <code>YARN_CONF_DIR</code> variable.
 </td></tr>
 <tr><td> <code>yarn-client</code> </td><td> Equivalent to <code>yarn</code> with <code>--deploy-mode client</code>,