config-and-run.sh

#!/bin/bash

# Check if conf folder is empty
if [[ -d /opt/zookeeper/conf && -z "$(ls -A /opt/zookeeper/conf)" ]]; then
  cp /opt/zookeeper/conf.template/* /opt/zookeeper/conf/
fi

# Persists the ID of the current instance of Zookeeper
echo ${SERVER_ID} > /opt/zookeeper/data/myid

# Substitute vars in configuration file
envsubst < /opt/zookeeper/conf/zoo-template.cfg > /opt/zookeeper/conf/zoo.cfg

exec /opt/zookeeper/bin/zkServer.sh start-foreground