Elasticsearch With Haystack -Initial connection to Elasticsearch failed


I am trying to run Chapter 7 to learn about Haystack for QA:

I am using Jupyter Notebook which is connected to my GCP VM : Debian GNU/Linux 9, Tesla V100
I did install debian version
but facing the following error : ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at [{'host': 'localhost', 'port': 9200}] and that it has finished the initial ramp up (can take > 30s).

!wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.1.2-linux-x86_64.tar.gz
!wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.1.2-linux-x86_64.tar.gz.sha512
!shasum -a 512 -c elasticsearch-8.1.2-linux-x86_64.tar.gz.sha512
!tar -xzf elasticsearch-8.1.2-linux-x86_64.tar.gz
!cd elasticsearch-8.1.2/
!pip install pymilvus
import pymilvus
import os
from subprocess import Popen, PIPE, STDOUT

!chown -R daemon:daemon elasticsearch-8.1.2
es_server = Popen(args=[‘elasticsearch-8.1.2/bin/elasticsearch’])
!sleep 30

from haystack.document_store.elasticsearch import ElasticsearchDocumentStore

#document_store = ElasticsearchDocumentStore(host=‘localhost’, port= 9201, username=’’, password=’’)
document_store = ElasticsearchDocumentStore(return_embedding=True)

I would appreciate your support on this.