Fixing envsubstitution

Dockerfile

@@ -7,11 +7,16 @@ RUN yum -y install wget
 RUN rpm --import http://public-repo-1.hortonworks.com/HDP/centos7/2.x/updates/2.5.3.0/RPM-GPG-KEY/RPM-GPG-KEY-Jenkins
 RUN cd /etc/yum.repos.d/;wget http://public-repo-1.hortonworks.com/HDP/centos7/2.x/updates/2.5.3.0/hdp.repo
 RUN yum -y install kafka
+RUN yum -y install gettext
 
 RUN mkdir -p /etc/mirror-maker/
-ADD ./consumer.config /etc/mirror-maker/
-ADD ./producer.config /etc/mirror-maker/
+ADD ./consumer.config /tmp/mirror-maker/
+ADD ./producer.config /tmp/mirror-maker/
 ADD ./run.sh /etc/mirror-maker/
 RUN chmod +x /etc/mirror-maker/run.sh
 
+ENV DESTINATION "localhost:6667"
+ENV SOURCE "localhost:6667"
+ENV SECURITY "PLAINTEXT"
+
 CMD /etc/mirror-maker/run.sh

consumer.config

@@ -1 +1,2 @@
-security.protocol=${SECURITY.PROTOCOL}
+security.protocol=${SECURITY}
+bootstrap.servers=${SOURCE}

producer.config

@@ -1 +1,2 @@
-security.protocol=${SECURITY.PROTOCOL}
+security.protocol=${SECURITY}
+bootstrap.servers=${DESTINATION}

run.sh

@@ -1,6 +1,13 @@
+#!/bin/bash
 ################################################################
 #
 #  Author: Ambud Sharma
 #
 ################################################################
+
+set -eu
+
+envsubst < /tmp/mirror-maker/producer.config > /etc/mirror-maker/producer.config
+envsubst < /tmp/mirror-maker/consumer.config > /etc/mirror-maker/consumer.config
+
 /usr/hdp/current/kafka-broker/bin/kafka-mirror-maker.sh --whitelist ${WHITELIST} --abort.on.send.failure false --new.consumer --producer.config /etc/mirror-maker/producer.config --consumer.config /etc/mirror-maker/consumer.config