1） 您可以连接您的spark shell和spark submit到mesos群集：

./bin/spark-shell -h
Usage: ./bin/spark-shell [options]
Options:
  --master MASTER_URL         spark://host:port, mesos://host:port,     yarn, or local.
  --deploy-mode DEPLOY_MODE   Whether to launch the driver program locally ("client") or
                          on one of the worker machines inside the cluster ("cluster")
                          (Default: client).
...

2） 有没有办法从spark shell运行一个示例（sparkpi）？
简言之-是的。但它可能只在spark 2.0中起作用。
sparkpi示例在spark1.6中的实现试图创建新的spark上下文（而sparkshell已经创建了一个上下文-这将导致问题）。
https://github.com/apache/spark/blob/branch-1.6/examples/src/main/scala/org/apache/spark/examples/sparkpi.scala

val conf = new SparkConf().setAppName("Spark Pi")
val spark = new SparkContext(conf)

spark 2.0中的实现尝试重用现有spark上下文：https://github.com/apache/spark/blob/branch-2.0/examples/src/main/scala/org/apache/spark/examples/sparkpi.scala

val spark = SparkSession
  .builder
  .appName("Spark Pi")
  .getOrCreate()

那么如何从外壳开始呢？给你：

./bin/spark-shell --jars ./examples/jars/spark-examples_2.11-2.0.0.jar 
scala> org.apache.spark.examples.SparkPi.main(Array("100"))
Pi is roughly 3.1413147141314712