Improved example execution in README.sh

* The setup for Docker Compose uses a specific version of Kafka
* README.sh uses Docker to execute kafka-commands
* No error-message is issued, if the topic already exists

diff --git a/README.sh b/README.sh
index 6a4ef4c..2557d2f 100755 (executable)
--- a/README.sh
+++ b/README.sh
@@ -26,16 +26,16 @@ trap 'kill $(jobs -p)' EXIT
 
 docker-compose up -d zookeeper kafka
 
-while ! [[ $(zookeeper-shell zookeeper:2181 ls /brokers/ids 2> /dev/null) =~ 1001 ]];
+while ! [[ $(docker-compose exec kafka zookeeper-shell zookeeper:2181 ls /brokers/ids 2> /dev/null) =~ 1001 ]];
 do
   echo "Waiting for kafka...";
   sleep 1;
 done
 
-kafka-topics --create --zookeeper zookeeper:2181 --replication-factor 1 --partitions 3 --topic outbox
+docker-compose exec kafka kafka-topics --zookeeper zookeeper:2181 --create --if-not-exists --replication-factor 1 --partitions 3 --topic outbox
 
 
-docker-compose up -d jdbc outbox
+docker-compose up -d jdbc outbox kafkacat
 
 while ! [[ $(http :8080/actuator/health 2>/dev/null | jq -r .status) == "UP" ]];
 do
@@ -44,7 +44,7 @@ do
 done
 
 
-kafkacat -C -b localhost:9092 -t outbox &
+docker-compose logs -f kafkacat &
 
 echo peter | http :8080/users
 echo franz | http :8080/users

diff --git a/docker-compose.yml b/docker-compose.yml
index 2cd2608..23c39f1 100644 (file)
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,14 +3,14 @@ version: "3"
 services:
 
   zookeeper:
-    image: "confluentinc/cp-zookeeper:latest"
+    image: confluentinc/cp-zookeeper:6.0.1
     ports:
       - 2181:2181
     environment:
       ZOOKEEPER_CLIENT_PORT: 2181
 
   kafka:
-    image: confluentinc/cp-kafka:latest
+    image: confluentinc/cp-kafka:6.0.1
     ports:
       - 9092:9092
     environment:
@@ -22,6 +22,13 @@ services:
     depends_on:
       - zookeeper
 
+  kafkacat:
+    image: confluentinc/cp-kafkacat:6.0.1
+    command: "kafkacat -C -b kafka:9093 -t outbox -K:"
+    tty: true
+    depends_on:
+      - kafka
+
   jdbc:
     image: juplo/jdbc:outbox
     ports: