3 if [[ -z "$KAFKA_PORT" ]]; then
6 if [[ -z "$KAFKA_ADVERTISED_PORT" ]]; then
7 export KAFKA_ADVERTISED_PORT=$(docker port `hostname` $KAFKA_PORT | sed -r "s/.*:(.*)/\1/g")
9 if [[ -z "$KAFKA_BROKER_ID" ]]; then
10 # By default auto allocate broker ID
11 #export KAFKA_BROKER_ID=-1
12 export KAFKA_BROKER_ID=1
14 #if [[ -z "$KAFKA_LOG_DIRS" ]]; then
15 #export KAFKA_LOG_DIRS="/kafka/kafka-logs-$HOSTNAME"
16 export KAFKA_LOG_DIRS="/kafka/kafka-logs"
18 if [[ -z "$KAFKA_ZOOKEEPER_CONNECT" ]]; then
19 export KAFKA_ZOOKEEPER_CONNECT=$(env | grep ZK.*PORT_2181_TCP= | sed -e 's|.*tcp://||' | paste -sd ,)
22 if [[ -n "$KAFKA_HEAP_OPTS" ]]; then
23 sed -r -i "s/(export KAFKA_HEAP_OPTS)=\"(.*)\"/\1=\"$KAFKA_HEAP_OPTS\"/g" $KAFKA_HOME/bin/kafka-server-start.sh
27 if [[ -z "$KAFKA_ADVERTISED_HOST_NAME" && -n "$HOSTNAME_COMMAND" ]]; then
28 export KAFKA_ADVERTISED_HOST_NAME=$(eval $HOSTNAME_COMMAND)
33 if [[ $VAR =~ ^KAFKA_ && ! $VAR =~ ^KAFKA_HOME ]]; then
34 kafka_name=`echo "$VAR" | sed -r "s/KAFKA_(.*)=.*/\1/g" | tr '[:upper:]' '[:lower:]' | tr _ .`
35 env_var=`echo "$VAR" | sed -r "s/(.*)=.*/\1/g"`
36 if egrep -q "(^|^#)$kafka_name=" $KAFKA_HOME/config/server.properties; then
37 sed -r -i "s@(^|^#)($kafka_name)=(.*)@\2=${!env_var}@g" $KAFKA_HOME/config/server.properties #note that no config values may contain an '@' char
39 echo "$kafka_name=${!env_var}" >> $KAFKA_HOME/config/server.properties
44 if [[ -n "$CUSTOM_INIT_SCRIPT" ]] ; then
45 eval $CUSTOM_INIT_SCRIPT
51 # see https://medium.com/@gchudnov/trapping-signals-in-docker-containers-7a57fdda7d86#.bh35ir4u5
53 echo 'Stopping Kafka....'
54 if [ $KAFKA_PID -ne 0 ]; then
55 kill -s TERM "$KAFKA_PID"
63 # Capture kill requests to stop properly
64 trap "term_handler" SIGHUP SIGINT SIGTERM
66 $KAFKA_HOME/bin/kafka-server-start.sh $KAFKA_HOME/config/server.properties &