anchor.diff:      chown "$ZOO_USER:$ZOO_USER" "$ZOO_DATA_LOG_DIR" "$ZOO_DATA_DIR" "$ZOO_CONF_DIR"
   
   ARG GPG_KEY=D0BC8D8A4E90A40AFDFC43B3E22A746A68E327C1
  -ARG DISTRO_NAME=zookeeper-3.3.6
  +ARG DISTRO_NAME=zookeeper-3.4.11
   
   # Download Apache Zookeeper, verify its PGP signature, untar and clean up
   RUN set -ex; \
  
positive.code:     bash \
      su-exec
  
  # Set up environment varibales
  ENV ZOO_USER=zookeeper \
      ZOO_CONF_DIR=/conf \
      ZOO_DATA_DIR=/data \
  
negative.code: 
  COPY docker-entrypoint.sh /
  ENTRYPOINT ["/docker-entrypoint.sh"]
  CMD ["zkServer.sh", "start-foreground"]