HUE配置Spark Notebook

在HUE3.10版中已经具有spark notebook的功能，但需要自己配置。

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安装步骤

主要参照run-hue-spark-notebook-on-cloudera进行。

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注意点

在第四步，

#download Livy
wget http://archive.cloudera.com/beta/livy/livy-server-0.2.0.zip
unzip livy-server-0.2.0.zip -d /<your_livy_dir>

#set environment variables for Livy
export SPARK_HOME=/opt/cloudera/parcels/CDH/lib/spark
export JAVA_HOME=/usr/java/jdk1.7.0_67-cloudera
export HADOOP_CONF_DIR=<your hadoop_conf_dir found in the previous step in Hue configuration>
export HUE_SECRET_KEY=<your Hue superuser password, this is usually the user you use when you log in to Hue Web UI the first time>

#run Livy. You must run Livy as a user who has access to hdfs, for example, the superuser hdfs.
su hdfs
/<your_livy_dir>/livy-server-0.2.0/bin/livy-server

注意：HADOOP_CONF_DIR可能随着CDH的重启而改变，所以每次需要重新设置。也可以直接设置成固定的/etc/hadoop/conf，见CDH中服务的配置及启动 。

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测试

val data = Array(1, 2, 3, 4 ,5)
val distData = sc.parallelize(data)
distData.map(s=>s+1).collect()