Attempted to resurrect connection to dead ES instance

Elastic Stack Logstash
,
1

Hi, I am trying to setup logstash pipeline from kafka to Elasticsearch.
The logstash logs show Attempted to resurrect connection to dead ES instance error.

[logstash.outputs.elasticsearch][main] Attempted to resurrect connection to dead ES instance, but got an error {:url=>"http://elastic:xxxxxx@elasticsearch:9200/", :exception=>LogStash::Outputs::ElasticSearch::HttpClient::Pool::HostUnreachableError, :message=>"Elasticsearch Unreachable: [http://elasticsearch:9200/][Manticore::ClientProtocolException] elasticsearch:9200 failed to respond"}

I have everything setup using docker. Here is the docker-compose.yml:

version: "1.0"

services:
  setup:
    image: docker.elastic.co/elasticsearch/elasticsearch:${ELK_STACK_VERSION}
    container_name: setup
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
    user: "0"
    command: >
      bash -c '
        if [ x${ELASTIC_PASSWORD} == x ]; then
          echo "Set the ELASTIC_PASSWORD environment variable in the .env file";
          exit 1;
        elif [ x${KIBANA_PASSWORD} == x ]; then
          echo "Set the KIBANA_PASSWORD environment variable in the .env file";
          exit 1;
        fi;
        if [ ! -f config/certs/ca.zip ]; then
          echo "Creating CA";
          bin/elasticsearch-certutil ca --silent --pem -out config/certs/ca.zip;
          unzip config/certs/ca.zip -d config/certs;
        fi;
        if [ ! -f config/certs/certs.zip ]; then
          echo "Creating certs";
          echo -ne \
          "instances:\n"\
          "  - name: elasticsearch\n"\
          "    dns:\n"\
          "      - elasticsearch\n"\
          "      - localhost\n"\
          "    ip:\n"\
          "      - 127.0.0.1\n"\
          > config/certs/instances.yml;
          bin/elasticsearch-certutil cert --silent --pem -out config/certs/certs.zip --in config/certs/instances.yml --ca-cert config/certs/ca/ca.crt --ca-key config/certs/ca/ca.key;
          unzip config/certs/certs.zip -d config/certs;
        fi;
        echo "Setting file permissions"
        chown -R root:root config/certs;
        find . -type d -exec chmod 750 \{\} \;;
        find . -type f -exec chmod 640 \{\} \;;
        echo "Waiting for Elasticsearch availability";
        until curl -s --cacert config/certs/ca/ca.crt https://elasticsearch:9200 | grep -q "missing authentication credentials"; do sleep 30; done;
        echo "Setting kibana_system password";
        until curl -s -X POST --cacert config/certs/ca/ca.crt -u "elastic:${ELASTIC_PASSWORD}" -H "Content-Type: application/json" https://elasticsearch:9200/_security/user/kibana_system/_password -d "{\"password\":\"${KIBANA_PASSWORD}\"}" | grep -q "^{}"; do sleep 10; done;
        echo "All done!";
      '
    healthcheck:
      test: ["CMD-SHELL", "[ -f config/certs/elasticsearch/elasticsearch.crt ]"]
      interval: 1s
      timeout: 5s
      retries: 120

  zookeeper:
    image: confluentinc/cp-zookeeper:${CONFLUENTINC_STACK_VERSION}
    container_name: zookeeper
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
    ports:
      - 22181:2181
  
  kafka:
    depends_on:
      - zookeeper
    image: confluentinc/cp-kafka:${CONFLUENTINC_STACK_VERSION}
    container_name: kafka
    ports:
      - 9092:9092
      - 9101:9101
      - 29092:29092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
      KAFKA_JMX_PORT: 9101
      KAFKA_JMX_HOSTNAME: localhost

  elasticsearch:
    depends_on:
      setup:
        condition: service_healthy
    image: docker.elastic.co/elasticsearch/elasticsearch:${ELK_STACK_VERSION}
    container_name: elasticsearch
    volumes:
      - certs:/usr/share/elasticsearch/config/certs
      - elasticsearchdata:/usr/share/elasticsearch/data
    ports:
      - 127.0.0.1:9200:9200
    environment:
      - network.host=0.0.0.0
      - node.name=elasticsearch
      - cluster.name=docker-cluster
      - cluster.initial_master_nodes=elasticsearch
      - ELASTIC_PASSWORD=${ELASTIC_PASSWORD}
      - bootstrap.memory_lock=true
      - xpack.security.enabled=true
      - xpack.security.http.ssl.enabled=true
      - xpack.security.http.ssl.key=certs/elasticsearch/elasticsearch.key
      - xpack.security.http.ssl.certificate=certs/elasticsearch/elasticsearch.crt
      - xpack.security.http.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.enabled=true
      - xpack.security.transport.ssl.key=certs/elasticsearch/elasticsearch.key
      - xpack.security.transport.ssl.certificate=certs/elasticsearch/elasticsearch.crt
      - xpack.security.transport.ssl.certificate_authorities=certs/ca/ca.crt
      - xpack.security.transport.ssl.verification_mode=certificate
      - xpack.license.self_generated.type=basic
    mem_limit: ${MEM_LIMIT}
    ulimits:
      memlock:
        soft: -1
        hard: -1
    healthcheck:
      test:
        [
          "CMD-SHELL",
          "curl -s --cacert config/certs/ca/ca.crt https://localhost:9200 | grep -q 'missing authentication credentials'",
        ]
      interval: 10s
      timeout: 10s
      retries: 120

  kibana:
    depends_on:
      elasticsearch:
        condition: service_healthy
    image: docker.elastic.co/kibana/kibana:${ELK_STACK_VERSION}
    container_name: kibana
    volumes:
      - certs:/usr/share/kibana/config/certs
      - kibanadata:/usr/share/kibana/data
    ports:
      - 5601:5601
    environment:
      - SERVERNAME=kibana
      - ELASTICSEARCH_HOSTS=https://elasticsearch:9200
      - ELASTICSEARCH_USERNAME=kibana_system
      - ELASTICSEARCH_PASSWORD=${KIBANA_PASSWORD}
      - ELASTICSEARCH_SSL_CERTIFICATEAUTHORITIES=config/certs/ca/ca.crt
    mem_limit: ${MEM_LIMIT}
    healthcheck:
      test:
        [
          "CMD-SHELL",
          "curl -s -I http://localhost:5601 | grep -q 'HTTP/1.1 302 Found'",
        ]
      interval: 10s
      timeout: 10s
      retries: 120

  logstash:
    depends_on:
      - kafka
      - elasticsearch
    image: docker.elastic.co/logstash/logstash:${ELK_STACK_VERSION}
    container_name: logstash
    volumes:
      - ./logstash.conf:/usr/share/logstash/pipeline/logstash.conf
    environment:
      - http.host=0.0.0.0
      - ELASTICSEARCH_HOST=http://elasticsearch:9200
      - ELASTICSEARCH_USERNAME=logstash_system
      - ELASTICSEARCH_PASSWORD=${LOGSTASH_PASSWORD}
    command: >
      logstash -f /usr/share/logstash/pipeline/logstash.conf

volumes:
  certs:
    driver: local
  elasticsearchdata:
    driver: local
  kibanadata:
    driver: local

logstash.conf

input {
  kafka {
    bootstrap_servers => "kafka:29092"
    topics => ["topic"]
    group_id => "logstash_consumer_group"
    codec => "json"
    decorate_events => true
  }
}

output {
  elasticsearch {
    hosts => ["elasticsearch:9200"]
    user => "elastic"
    password => "password"
    index => "index"
    document_id => "%{[@metadata][fingerprint]}"
  }
}

Both the docker-compose.yml file and logstash.conf are in the same directory.

2

Do you have Elasticsearch running on http://elasticsearch:9200 ?

3

It is running

image
image2278×628 106 KB

elasticsearch:9200/ is showing elasticsearch ’s DNS address could not be found.
127.0.0.1:9200/ is showing 127.0.0.1 didn’t send any data.