[Examples] bulk/kafka (#489) (#490)

* Update go dependencies

* Disable Elasticsearch security for kafka demo

* Remove apm-server for now, reintegrate with fleet later

* Remove APM direct reference from readme

Co-authored-by: Laurent Saint-Félix <laurent.saintfelix@elastic.co>

Author: github-actions[bot]

_examples/bulk/kafka/README.md

@@ -16,9 +16,7 @@ Then, launch the Kafka producers and consumers and the Elasticsearch indexer:
     make run
 
 Open the [_Kibana_ dashboard](http://localhost:5601/app/kibana#/dashboard/140b5490-5fce-11ea-a238-bf5970186390) to see
-the results, the [_
-Kibana_ APM application](http://localhost:5601/app/apm#/services/kafka/transactions?rangeFrom=now-15m&rangeTo=now&refreshPaused=true&refreshInterval=0&transactionType=indexing)
-to see the indexer metrics, and [_Confluent Control Center_](http://localhost:9021/) to inspect the Kafka cluster and
+the results and [_Confluent Control Center_](http://localhost:9021/) to inspect the Kafka cluster and
 see details about the topic and performance of consumers.
 
 See the [`producer/producer.go`](producer/producer.go) file for the Kafka

_examples/bulk/kafka/docker-compose.yml

@@ -88,6 +88,8 @@ services:
       - network.host=elasticsearch,_local_
       - network.publish_host=elasticsearch
       - bootstrap.memory_lock=true
+      - xpack.security.enabled=false
+      - xpack.security.http.ssl.enabled=false
       - ES_JAVA_OPTS=-Xms${ES_MEMORY} -Xmx${ES_MEMORY}
     ulimits: { nofile: { soft: 65535, hard: 65535 }, memlock: -1 }
     healthcheck:
@@ -107,19 +109,6 @@ services:
     healthcheck:
       test: curl --max-time 120 --retry 120 --retry-delay 1 --show-error --silent http://localhost:5601
 
-  apm_server:
-    container_name: apm_server
-    image: docker.elastic.co/apm/apm-server:${ELASTIC_VERSION}
-    depends_on: [ 'elasticsearch', 'kibana' ]
-    command: -e --strict.perms=false
-    networks:
-      - elasticsearch
-    ports:
-      - 8200:8200
-    restart: on-failure
-    healthcheck:
-      test: curl --max-time 120 --retry 120 --retry-delay 1 --show-error --silent http://localhost:8200
-
 networks:
   kafka:
   elasticsearch: