I can't initalize a document store instance through ElasticSearch

[ElinLiu0]

As the title i mentioned:i have clone the repo,install the elastic7 version,and try to use below code to establish connection:

from haystack.document_stores.elasticsearch import ElasticsearchDocumentStore
document_store = ElasticsearchDocumentStore(return_embedding=True)

Yet it raise a error like this:

ConnectionError: Initial connection to Elasticsearch failed. Make sure you run an Elasticsearch instance at `[{'host': 'localhost', 'port': 9200, 'scheme': 'http'}]` and that it has finished the initial ramp up (can take > 30s). Also, make sure you are using the correct credentials if you are using a secured Elasticsearch instance.

But the weried things is that: when i using GET to try accessing to it

import requests
requests.get("http://localhost:9200/?pretty").json()

It returns the result that i want :

{'name': 'ElinWorkstation',
 'cluster_name': 'elasticsearch',
 'cluster_uuid': '8pUiK8qaTnqQ2xWV2jLMGg',
 'version': {'number': '7.9.1',
  'build_flavor': 'default',
  'build_type': 'tar',
  'build_hash': '083627f112ba94dffc1232e8b42b73492789ef91',
  'build_date': '2020-09-01T21:22:21.964974Z',
  'build_snapshot': False,
  'lucene_version': '8.6.2',
  'minimum_wire_compatibility_version': '6.8.0',
  'minimum_index_compatibility_version': '6.0.0-beta1'},
 'tagline': 'You Know, for Search'}

So i don't know how to resolve this right now,this my first time that hands on ElasticSearch yet.

[masci]

It looks like you're using ES 7.9.1 but the integration supports >=8.0.

[ElinLiu0]

It looks like you're using ES 7.9.1 but the integration supports >=8.0.

Actually i have no idea that the version i should chose,otherwise this code were from book i reading right now.He use version 7.9.2 of ES,but he didn't mention the haystack version that he use.
So for my case,which Python library should i install?Please let me know,thank you so much,mate.

[masci]

@ElinLiu0 which book are you reading?

[ElinLiu0]

@ElinLiu0 which book are you reading?

This one

[masci]

@ElinLiu0 Gotcha, my bad sorry for mentioning the "integration", that was confusing.

Can you trying following this tutorial step by step? So we're sure we're talking about the same Haystack version and I can try to reproduce.

[ElinLiu0]

Thanks mate,by following the guide that you given to me.It seems working fine and output with that:

Would you have a check?