Updated to kafka version 2.2.0

kafka/Dockerfile

@@ -1,10 +1,10 @@
 # Kafka and Zookeeper
 
-FROM java:openjdk-8-jre
+FROM openjdk:8-jre-stretch
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV SCALA_VERSION 2.11
-ENV KAFKA_VERSION 0.10.1.0
+ENV KAFKA_VERSION 2.2.0
 ENV KAFKA_HOME /opt/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION"
 
 # Install Kafka, Zookeeper and other needed things
@@ -17,6 +17,7 @@ RUN apt-get update && \
     rm /tmp/kafka_"$SCALA_VERSION"-"$KAFKA_VERSION".tgz
 
 ADD scripts/start-kafka.sh /usr/bin/start-kafka.sh
+RUN chmod +x /usr/bin/start-kafka.sh
 
 # Supervisor config
 ADD supervisor/kafka.conf supervisor/zookeeper.conf /etc/supervisor/conf.d/

kafka/scripts/start-kafka.sh

@@ -20,15 +20,15 @@ if [ ! -z "$ADVERTISED_HOST" ]; then
     if grep -q "^advertised.host.name" $KAFKA_HOME/config/server.properties; then
         sed -r -i "s/#(advertised.host.name)=(.*)/\1=$ADVERTISED_HOST/g" $KAFKA_HOME/config/server.properties
     else
-        echo "advertised.host.name=$ADVERTISED_HOST" >> $KAFKA_HOME/config/server.properties
+        echo "\n advertised.host.name=$ADVERTISED_HOST" >> $KAFKA_HOME/config/server.properties
     fi
 fi
 if [ ! -z "$ADVERTISED_PORT" ]; then
     echo "advertised port: $ADVERTISED_PORT"
     if grep -q "^advertised.port" $KAFKA_HOME/config/server.properties; then
         sed -r -i "s/#(advertised.port)=(.*)/\1=$ADVERTISED_PORT/g" $KAFKA_HOME/config/server.properties
     else
-        echo "advertised.port=$ADVERTISED_PORT" >> $KAFKA_HOME/config/server.properties
+        echo "\n advertised.port=$ADVERTISED_PORT" >> $KAFKA_HOME/config/server.properties
     fi
 fi