Spark运行脚本 start-all.sh（standalone）

#!/usr/bin/env bash

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# Start all spark daemons.
# Starts the master on this node.
# Starts a worker on each node specified in conf/slaves

if [ -z "${SPARK_HOME}" ]; then
  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
fi

# Load the Spark configuration
. "${SPARK_HOME}/sbin/spark-config.sh"   

# Start Master
"${SPARK_HOME}/sbin"/start-master.sh   

# Start Workers
"${SPARK_HOME}/sbin"/start-slaves.sh   

1）先检查Spark的环境变量；

 2）加载Spark的相关配置项：默认和自定义；

3） 执行start-master.sh，启动Master节点；

4）执行start-slaves.sh，启动所有的Worker节点。