Uses Zulu jre/jdk like cp-docker-images base does

kafka/Dockerfile

@@ -1,18 +1,22 @@
 FROM debian:stable-20170620
 
-ENV KAFKA_VERSION=0.11.0.0
+ENV KAFKA_VERSION=0.11.0.0 ZULU_OPENJDK_VERSION="8=8.21.0.1"
 ENV kafka_bin_version=2.11-$KAFKA_VERSION
 
 RUN set -ex; \
-  runDeps='default-jre'; \
-  buildDeps='curl ca-certificates'; \
+  runDeps=''; \
+  buildDeps='curl ca-certificates gnupg dirmngr'; \
   apt-get update && apt-get install -y $runDeps $buildDeps --no-install-recommends; \
-  rm -rf /var/lib/apt/lists/*; \
+  \
+  apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 0x219BD9C9; \
+  echo 'deb http://repos.azulsystems.com/debian stable main' > /etc/apt/sources.list.d/zulu.list; \
+  apt-get update && apt-get install -y zulu-${ZULU_OPENJDK_VERSION} --no-install-recommends; \
   \
   mkdir -p /opt/kafka; \
   curl -SLs "https://www-eu.apache.org/dist/kafka/$KAFKA_VERSION/kafka_$kafka_bin_version.tgz" | tar -xzf - --strip-components=1 -C /opt/kafka; \
   \
   apt-get purge -y --auto-remove $buildDeps; \
+  rm -rf /var/lib/apt/lists/*; \
   rm /var/log/dpkg.log /var/log/apt/*.log
 
 WORKDIR /opt/kafka