allow our generated attributes to be overridden by external environment variables

varju · varju · commit e4e66a7faddb · 2014-10-09T14:50:36.000-07:00
diff --git a/start-kafka.sh b/start-kafka.sh
@@ -1,9 +1,14 @@
 #!/bin/bash
 
-export KAFKA_ADVERTISED_PORT=$(docker port `hostname` 9092 | sed -r "s/.*:(.*)/\1/g")
-export KAFKA_BROKER_ID=$KAFKA_ADVERTISED_PORT
-export KAFKA_LOG_DIRS="\/kafka\/kafka-logs-$KAFKA_BROKER_ID"
-
+if [[ -z "$KAFKA_ADVERTISED_PORT" ]]; then
+    export KAFKA_ADVERTISED_PORT=$(docker port `hostname` 9092 | sed -r "s/.*:(.*)/\1/g")
+fi
+if [[ -z "$KAFKA_BROKER_ID" ]]; then
+    export KAFKA_BROKER_ID=$KAFKA_ADVERTISED_PORT
+fi
+if [[ -z "$KAFKA_LOG_DIRS" ]]; then
+    export KAFKA_LOG_DIRS="\/kafka\/kafka-logs-$KAFKA_BROKER_ID"
+fi
 if [[ -z "$KAFKA_ZOOKEEPER_CONNECT" ]]; then
     export KAFKA_ZOOKEEPER_CONNECT=$(env | grep ZK.*PORT_2181_TCP= | sed -e 's|.*tcp://||' | paste -sd ,)
 fi
