LlamaIndex Readers Integration: Elasticsearch
Overview
Elasticsearch (or Opensearch) Reader over REST API is a tool designed to read documents from an Elasticsearch or Opensearch index using the basic search API. These documents can then be utilized in downstream LlamaIndex data structures.
Installation
You can install Elasticsearch (or Opensearch) Reader via pip:
pip install llama-index-readers-elasticsearch
Usage
from llama_index.core.schema import Document
from llama_index.readers.elasticsearch import ElasticsearchReader
# Initialize ElasticsearchReader
reader = ElasticsearchReader(
endpoint="<Your Elasticsearch/Opensearch Endpoint>",
index="<Index Name>",
httpx_client_args={
"timeout": 10
}, # Optional additional arguments for the httpx.Client
)
# Load data from Elasticsearch
documents = reader.load_data(
field="<Field Name>", # Field in the document to retrieve text from
query={"query": {"match_all": {}}}, # Elasticsearch JSON query DSL object
embedding_field="<Embedding Field>", # Field for embeddings (optional)
)
This loader is designed to be used as a way to load data into LlamaIndex and/or subsequently used as a Tool in a LangChain Agent.
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