kafka/images/kafka-broker/root/entrypoint.d/40-kafka.env

#!/bin/sh

set -eo pipefail
if [ -w "${KAFKA_CONF_DIR}/server.properties" ]; then
  umask 077
  TMPCONF=$(mktemp)
  envsubst < ${KAFKA_CONF_DIR}/server.properties > ${TMPCONF}
  cat ${TMPCONF} > ${KAFKA_CONF_DIR}/server.properties
  rm -f ${TMPCONF}
fi