Add heathchecks to docker-compose

docker-compose.yaml

@@ -10,6 +10,7 @@ services:
      - 2181:2181
      - 2888:2888
      - 3888:3888
+    healthcheck: {test: nc -z localhost 2181, interval: 1s, start_period: 120s}
 
   kafka:
     image: quay.io/debezium/kafka:1.9
@@ -20,25 +21,31 @@ services:
      - zookeeper
     environment:
       ZOOKEEPER_CONNECT: zookeeper:2181
+    healthcheck: {test: nc -z localhost 9092, interval: 1s, start_period: 120s}
+    depends_on:
+      zookeeper: {condition: service_healthy}
 
   schema-registry:
     image: confluentinc/cp-schema-registry:7.2.0
     container_name: schema-registry
     ports:
       - 8081:8081
     depends_on:
-      - kafka
+      kafka: {condition: service_healthy}
+      zookeeper: {condition: service_healthy}
     environment:
       SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: kafka:9092
       SCHEMA_REGISTRY_HOST_NAME: schema-registry
       SCHEMA_REGISTRY_LISTENERS: http://schema-registry:8081,http://localhost:8081
+    healthcheck: {test: curl -f localhost:8081, interval: 1s, start_period: 120s}
 
   datagen:
     build: .
     container_name: datagen
     depends_on:
-      - kafka
-      - schema-registry
+      kafka: {condition: service_healthy}
+      schema-registry: {condition: service_healthy}
+      zookeeper: {condition: service_healthy}
     environment:
       SCHEMA_REGISTRY_URL: http://schema-registry:8081
       KAFKA_BROKERS: kafka:9092