Node.js doesn't establish connection to Elasticsearch from docker container

Elastic Search
,
1

I'm trying to connect my Node.js application to Elasticsearch with docker containers but without success.
I've tried many variants but none of them worked out for me.

Elasticsearch container is up and running and I can access to it in the browser with localhost:9200 but it doesn't connect through the container name elasticsearch:9200.

I made a check with curl elasticsearch:9200 and prints curl: (6) Could not resolve host: elasticsearch. Also tried with curl http://host.docker.internal:9200 and the same error.

I can open Elastic Dashboard at localhost:5601/app/observability/overview but is not showing metrics panel obiously because of the Connection Error.

I've also checked console.log(${config.ELASTIC_SEARCH_URL}) and prints http://elasticsearch:9200 and also tried with node: ${config.ELASTIC_SEARCH_URL} || http://localhost:9200 as a fallback but neither of them works.

I tried to add notification service to elastic network but it immediately fails and also removed elastic network and tried to use the Docker network that adds by default but still the same error so I don't know how to get around this.

Any help will be appreciated endlessly !

curl localhost:9200

{
  "name": "3e9d7110bb8a",
  "cluster_name": "docker-cluster",
  "cluster_uuid": "sAZvoS3YRSiewKxFqC1RhA",
  "version": {
    "number": "8.11.4",
    "build_flavor": "default",
    "build_type": "docker",
    "build_hash": "da06c53fd49b7e676ccf8a32d6655c5155c16d81",
    "build_date": "2024-01-08T10:05:08.438562403Z",
    "build_snapshot": false,
    "lucene_version": "9.8.0",
    "minimum_wire_compatibility_version": "7.17.0",
    "minimum_index_compatibility_version": "7.0.0"
  },
  "tagline": "You Know, for Search"
}

Elasticsearch docker-compose.yaml file:

version: '3.9'

services:
  elasticsearch:
    container_name: elasticsearch
    image: docker.elastic.co/elasticsearch/elasticsearch:8.11.4
    restart: always
    environment:
      ES_JAVA_OPTS: -Xmx2g -Xms2g
      discovery.type: 'single-node'
      xpack.security.enabled: 'false'
    ports:
      - 9200:9200
      - 9300:9300
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    deploy:
      resources:
        limits:
          cpus: '2.0'
        reservations:
          cpus: '1.0'
    networks:
      - elastic

Node.js notification service:

version: '3.9'

services:
  notification:
    container_name: notification
    build:
      context: .
      dockerfile: Dockerfile.dev
    restart: always
    ports:
      - 4001:4001
    environment:
      - NODE_ENV=development
      - ELASTIC_SEARCH_URL=http://elasticsearch:9200
    depends_on:
      - elasticsearch

Root docker-compose.yaml

version: '3.9'

services:    
  elasticsearch:
    extends:
      service: elasticsearch
      file: infra/docker/docker-compose-elasticsearch.yaml

  kibana:
    extends:
      service: kibana
      file: infra/docker/docker-compose-kibana.yaml

  notification:
    extends:
      service: notification
      file: api/notification/docker-compose.yaml
    depends_on:
      - elasticsearch

networks:
  elastic:
    name: elastic

The client code:

import { Client } from '@elastic/elasticsearch';
import { ClusterHealthResponse } from '@elastic/elasticsearch/lib/api/types';
import { config } from '@notification/config';
import { Logger } from 'winston';

const logger: Logger = winstonLogger(
  `${config.ELASTIC_SEARCH_URL}`,
  'notificationElasticSearchServer',
  'debug',
);

const elasticSearchClient = new Client({
  node: `${config.ELASTIC_SEARCH_URL}`,
});

export const checkConnection = async (): Promise<void> => {
  let isConnected = false;

  while (!isConnected) {
    try {
      const health: ClusterHealthResponse =
        await elasticSearchClient.cluster.health({});

      logger.info(
        `NotificationService ElasticSearch health status - ${health.status}`,
      );
      isConnected = true;
    } catch (error) {
      logger.error('Connection to ElasticSearch failed. Retrying...');
      logger.error(
        'error',
        'NotificationService checkConnection() method:',
        error,
      );
    }
  }
};

When I run docker-compose up it throws:

notification     | ERROR:
notification     |     message: "Connection to ElasticSearch failed. Retrying..."
notification     |     service: "notificationElasticSearchServer"
notification     | ERROR:
notification     |     message: "error"
notification     |     service: "notificationElasticSearchServer"
2

Make sure to define the "elastic" network in the same docker-compose.yaml file.

networks:
  elastic:
    driver: bridge
3

Still get the same error.

4

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