Python script for migrating data

from elasticsearch import Elasticsearch as ES

# Connect to Elasticsearch
es_client = ES(["http://elasticsearch:9200"])

# Connect to OpenSearch
os_client = ES(["http://opensearch:9200"])

# Fetch all documents from Elasticsearch
query = {"query": {"match_all": {}}}
es_docs = es_client.search(index="my_index", body=query, size=10000)

# Index documents in OpenSearch
for doc in es_docs["hits"]["hits"]:
    os_client.index(index="my_index", body=doc["_source"])