「Faraday::ConnectionFailed: getaddrinfo: Name or service not known (コンテナ名:9200)」というエラーが起きる

発生している問題・エラーメッセージ

rakeタスクを実行すると以下のようなエラーが発生します。

rails aborted!
Faraday::ConnectionFailed: getaddrinfo: Name or service not known (◯◯◯_rails_elasticsearch_1:9200)

/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:625:in `rescue in create_socket'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:607:in `create_socket'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:755:in `block in connect'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:748:in `connect'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:511:in `query'
...

Caused by:
SocketError: getaddrinfo: Name or service not known (◯◯◯_elasticsearch_1:9200)
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:625:in `rescue in create_socket'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:607:in `create_socket'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:755:in `block in connect'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:748:in `connect'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:511:in `query'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient/session.rb:177:in `query'
/usr/local/bundle/gems/httpclient-2.8.3/lib/httpclient.rb:1242:in `do_get_block'
...

該当のソースコード

#docker-compose.yml

version: '3'
services:
  web:
    build: .
    command: rails s -p 3000 -b '0.0.0.0'
    environment:
      ELASTICSEARCH_URL: http://elastic:changeme@○○○_rails_elasticsearch_1:9200
      COLUMN_URL: http://localhost:3000/○○○
      S3_ACCESS_KEY: ${S3_ACCESS_KEY}
      S3_SECRET_KEY: ${S3_SECRET_KEY}
      S3_REGION: ${S3_REGION}
      COMPLETE_MAILE_TO: test@example.com
    ports:
      - "3000:3000"
    volumes:
      - .:/○○○:cached
      - .:/app:cached

  mysql:
    image: mysql:5.6.35
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: ○○○
    ports:
      - "3306:3306"
    volumes:
      - mysql-data:/var/lib/mysql
      - ./docker/services/mysql/conf.d:/etc/mysql/conf.d

  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.10.0
    environment:
      - discovery.type=single-node
      - cluster.name=docker-cluster
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9200:9200
    volumes:
      - es-data:/usr/share/elasticsearch/data
      - ./docker/services/elasticsearch/install-plugin.sh:/tmp/install-plugin.sh
    entrypoint: >
      bash -c "chmod +x /tmp/install-plugin.sh &&
               /tmp/install-plugin.sh analysis-kuromoji &&
              docker-entrypoint.sh"
  kibana:
    image: docker.elastic.co/kibana/kibana:7.10.0
    ports:
      - 5601:5601

  mail:
    image: schickling/mailcatcher
    ports:
      - "1025:1025"
      - "1080:1080"

volumes:
  mysql-data:
    driver: local
  es-data:
    driver: local

#database.yml

default: &default
  adapter: mysql2
  encoding: utf8
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV["DATABASE_USER_NAME"] %>
  password: <%= ENV["DATABASE_PASSWORD"] %>

development:
  <<: *default
  database: ○○○
  host: mysql
  username: root
  password: root