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#!/usr/bin/env bash
#
# Usage: start-slave.sh <worker#> <master-spark-URL>
# where <master-spark-URL> is like "spark://localhost:7077"
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
# Set SPARK_PUBLIC_DNS so slaves can be linked in master web UI
if [ "$SPARK_PUBLIC_DNS" = "" ]; then
# If we appear to be running on EC2, use the public address by default:
# NOTE: ec2-metadata is installed on Amazon Linux AMI. Check based on that and hostname
if command -v ec2-metadata > /dev/null || [[ `hostname` == *ec2.internal ]]; then
export SPARK_PUBLIC_DNS=`wget -q -O - http://instance-data.ec2.internal/latest/meta-data/public-hostname`
fi
fi
"$bin"/spark-daemon.sh start spark.deploy.worker.Worker "$@"
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