Repository: hyeneung/tech-blog-hub-site
Issue category: Performance Issue

Issue:
[Feature] Migrate from OpenSearch to Elasticsearch to improve Search Performance
## Work Details
- Current performance with AWS OpenSearch Free Tier shows query times averaging 1.5 seconds.
- Plan to migrate to a self-hosted Elasticsearch instance on EC2(free tier) using Docker.
- Expected outcome: Reduce query times significantly, targeting under 500ms based on preliminary tests showing potential improvements.

## Task List
- [x] Set up Docker environment on EC2 for Elasticsearch deployment.
- [x] Migrate existing data and queries from OpenSearch to Elasticsearch.
- [x] Monitor and benchmark performance post-migration to ensure query times meet expectations.

This plan aims to enhance the search experience by leveraging the capabilities of Elasticsearch, which has demonstrated superior performance compared to OpenSearch in our initial assessments. The goal is to achieve a more responsive system that can handle user queries efficiently.


Hints:

Patch:
diff --git a/serverless/apis/recommend/lambda_function.py b/serverless/apis/recommend/lambda_function.py
index 3e72617..f61f099 100644
--- a/serverless/apis/recommend/lambda_function.py
+++ b/serverless/apis/recommend/lambda_function.py
@@ -1,32 +1,24 @@
 import json
 import os
 from typing import Dict, Any, Tuple
-from opensearchpy import OpenSearch, RequestsHttpConnection
-from requests_aws4auth import AWS4Auth
-import boto3
+from elasticsearch import Elasticsearch
 from aws_xray_sdk.core import xray_recorder
 # from aws_xray_sdk.ext.flask.middleware import XRayMiddleware
 
 from recommend import get_recommend_articles_by_url
 
 # AWS 및 OpenSearch 설정
-host = os.getenv('OPENSEARCH_HOST')
-region = 'ap-northeast-2'
-service = 'es'
+host = os.getenv('ELASTICSEARCH_HOST')
+port = os.getenv('ELASTICSEARCH_PORT')
+username = os.getenv('ELASTICSEARCH_USERNAME')
+password = os.getenv('ELASTICSEARCH_PASSWORD')
 index_name = 'article_infos'
 
-# AWS 인증 정보 가져오기
-credentials = boto3.Session().get_credentials()
-awsauth = AWS4Auth(credentials.access_key, credentials.secret_key,
-                   region, service, session_token=credentials.token)
-
-# OpenSearch 클라이언트 초기화
-client = OpenSearch(
-    hosts=[{'host': host, 'port': 443}],
-    http_auth=awsauth,
-    use_ssl=True,
-    verify_certs=True,
-    connection_class=RequestsHttpConnection
+client = Elasticsearch(
+    [f"https://{host}:{port}"],
+    basic_auth=(username, password),
+    verify_certs=False,
+    ssl_show_warn=False
 )
 
 def get_current_article_by_url(url: str) -> Tuple[bool, Dict[str, Any]]:
diff --git a/serverless/apis/recommend/opensearch/article_analyze.py b/serverless/apis/recommend/opensearch/article_analyze.py
index 2432330..3f7ea21 100644
--- a/serverless/apis/recommend/opensearch/article_analyze.py
+++ b/serverless/apis/recommend/opensearch/article_analyze.py
@@ -1,11 +1,11 @@
 from aws_xray_sdk.core import xray_recorder
-from opensearchpy import OpenSearch
+from elasticsearch import Elasticsearch
 from itertools import combinations
 from random import shuffle
 from typing import List, Dict, Any
 import pandas as pd
 
-def get_db_dataframe(client: OpenSearch) -> pd.DataFrame:
+def get_db_dataframe(client: Elasticsearch) -> pd.DataFrame:
     # X-Ray 서브세션 시작
     subsegment = xray_recorder.begin_subsegment('DBQueryAll')
     # 모든 데이터 검색
@@ -17,18 +17,22 @@ def get_db_dataframe(client: OpenSearch) -> pd.DataFrame:
         "size": 10000
     }
 
-    response = client.search(
-        body = query,
-        index = index_name
-    )    
-    # 검색 결과를 DataFrame으로 변환
-    hits = response['hits']['hits']
-    data = [hit['_source'] for hit in hits]
-    # X-Ray 서브세션 종료
-    xray_recorder.end_subsegment()
-    return pd.DataFrame(data)
+    try:
+        response = client.search(
+            body=query,
+            index=index_name
+        )        
+        xray_recorder.end_subsegment()
+
+        # 검색 결과를 DataFrame으로 변환
+        hits = response['hits']['hits']
+        data = [hit['_source'] for hit in hits]
+        return pd.DataFrame(data)
+    except Exception as e:
+        print(f"Error querying Elasticsearch: {e}")
+        return pd.DataFrame()  # 빈 DataFrame 반환
 
-def get_contents_base_recommendations(client: OpenSearch, input_url: str) -> List[Dict[str, Any]]:
+def get_contents_base_recommendations(client: Elasticsearch, input_url: str) -> List[Dict[str, Any]]:
     """
     주어진 URL과 유사한 해시태그를 보유한 URL들을 JSON 형식으로 반환하는 함수입니다.
 
diff --git a/serverless/apis/recommend/recommend.py b/serverless/apis/recommend/recommend.py
index 529b494..42da902 100644
--- a/serverless/apis/recommend/recommend.py
+++ b/serverless/apis/recommend/recommend.py
@@ -1,8 +1,8 @@
 from typing import List, Dict, Any
 from opensearch.article_analyze import get_contents_base_recommendations
-from opensearchpy import OpenSearch
+from elasticsearch import Elasticsearch
 
-def get_recommend_articles_by_url(client: OpenSearch, url: str) -> List[Dict[str, Any]]:
+def get_recommend_articles_by_url(client: Elasticsearch, url: str) -> List[Dict[str, Any]]:
     """
     사용자가 방문한 기술 블로그 게시글 URL을 받아 추천할 게시글들을 반환하는 함수입니다.
 
diff --git a/serverless/apis/recommend/requirements.txt b/serverless/apis/recommend/requirements.txt
index be7ff3d..eeaa026 100644
--- a/serverless/apis/recommend/requirements.txt
+++ b/serverless/apis/recommend/requirements.txt
@@ -1,6 +1,4 @@
-opensearch-py==2.7.1
-requests-aws4auth==1.3.1
-boto3==1.35.57
+elasticsearch==8.7.0
 google-cloud-bigquery==3.11.4
 aws-xray-sdk==2.14.0
 pandas==2.0.3
diff --git a/serverless/apis/search/go.mod b/serverless/apis/search/go.mod
index 1eea45e..d65f600 100644
--- a/serverless/apis/search/go.mod
+++ b/serverless/apis/search/go.mod
@@ -4,35 +4,24 @@ go 1.22.2
 
 require (
 	github.com/aws/aws-lambda-go v1.47.0
-	github.com/aws/aws-sdk-go-v2/config v1.27.43
 	github.com/aws/aws-xray-sdk-go v1.8.4
+	github.com/elastic/go-elasticsearch/v8 v8.17.0
 	github.com/go-playground/validator/v10 v10.22.1
+	github.com/go-redis/redis/v8 v8.11.5
 	github.com/google/uuid v1.6.0
-	github.com/opensearch-project/opensearch-go v1.1.0
-	github.com/opensearch-project/opensearch-go/v2 v2.3.0
 )
 
 require (
 	github.com/andybalholm/brotli v1.0.6 // indirect
 	github.com/aws/aws-sdk-go v1.47.9 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.32.2 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.17.41 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.17 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.24.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.32.2 // indirect
-	github.com/aws/smithy-go v1.22.0 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/elastic/elastic-transport-go/v8 v8.6.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-redis/redis/v8 v8.11.5 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.17.2 // indirect
@@ -40,9 +29,12 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.50.0 // indirect
+	go.opentelemetry.io/otel v1.28.0 // indirect
+	go.opentelemetry.io/otel/metric v1.28.0 // indirect
+	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	golang.org/x/crypto v0.21.0 // indirect
 	golang.org/x/net v0.23.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 // indirect
 	google.golang.org/grpc v1.59.0 // indirect
diff --git a/serverless/apis/search/go.sum b/serverless/apis/search/go.sum
index 9d87da2..439371e 100644
--- a/serverless/apis/search/go.sum
+++ b/serverless/apis/search/go.sum
@@ -4,50 +4,10 @@ github.com/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sx
 github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/aws/aws-lambda-go v1.47.0 h1:0H8s0vumYx/YKs4sE7YM0ktwL2eWse+kfopsRI1sXVI=
 github.com/aws/aws-lambda-go v1.47.0/go.mod h1:dpMpZgvWx5vuQJfBt0zqBha60q7Dd7RfgJv23DymV8A=
-github.com/aws/aws-sdk-go v1.42.27/go.mod h1:OGr6lGMAKGlG9CVrYnWYDKIyb829c6EVBRjxqjmPepc=
-github.com/aws/aws-sdk-go v1.44.263/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/aws/aws-sdk-go v1.47.9 h1:rarTsos0mA16q+huicGx0e560aYRtOucV5z2Mw23JRY=
 github.com/aws/aws-sdk-go v1.47.9/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
-github.com/aws/aws-sdk-go-v2 v1.18.0/go.mod h1:uzbQtefpm44goOPmdKyAlXSNcwlRgF3ePWVW6EtJvvw=
-github.com/aws/aws-sdk-go-v2 v1.32.2 h1:AkNLZEyYMLnx/Q/mSKkcMqwNFXMAvFto9bNsHqcTduI=
-github.com/aws/aws-sdk-go-v2 v1.32.2/go.mod h1:2SK5n0a2karNTv5tbP1SjsX0uhttou00v/HpXKM1ZUo=
-github.com/aws/aws-sdk-go-v2/config v1.18.25/go.mod h1:dZnYpD5wTW/dQF0rRNLVypB396zWCcPiBIvdvSWHEg4=
-github.com/aws/aws-sdk-go-v2/config v1.27.43 h1:p33fDDihFC390dhhuv8nOmX419wjOSDQRb+USt20RrU=
-github.com/aws/aws-sdk-go-v2/config v1.27.43/go.mod h1:pYhbtvg1siOOg8h5an77rXle9tVG8T+BWLWAo7cOukc=
-github.com/aws/aws-sdk-go-v2/credentials v1.13.24/go.mod h1:jYPYi99wUOPIFi0rhiOvXeSEReVOzBqFNOX5bXYoG2o=
-github.com/aws/aws-sdk-go-v2/credentials v1.17.41 h1:7gXo+Axmp+R4Z+AK8YFQO0ZV3L0gizGINCOWxSLY9W8=
-github.com/aws/aws-sdk-go-v2/credentials v1.17.41/go.mod h1:u4Eb8d3394YLubphT4jLEwN1rLNq2wFOlT6OuxFwPzU=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.3/go.mod h1:4Q0UFP0YJf0NrsEuEYHpM9fTSEVnD16Z3uyEF7J9JGM=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.17 h1:TMH3f/SCAWdNtXXVPPu5D6wrr4G5hI1rAxbcocKfC7Q=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.17/go.mod h1:1ZRXLdTpzdJb9fwTMXiLipENRxkGMTn1sfKexGllQCw=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.33/go.mod h1:7i0PF1ME/2eUPFcjkVIwq+DOygHEoK92t5cDqNgYbIw=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21 h1:UAsR3xA31QGf79WzpG/ixT9FZvQlh5HY1NRqSHBNOCk=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21/go.mod h1:JNr43NFf5L9YaG3eKTm7HQzls9J+A9YYcGI5Quh1r2Y=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.27/go.mod h1:UrHnn3QV/d0pBZ6QBAEQcqFLf8FAzLmoUfPVIueOvoM=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21 h1:6jZVETqmYCadGFvrYEQfC5fAQmlo80CeL5psbno6r0s=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21/go.mod h1:1SR0GbLlnN3QUmYaflZNiH1ql+1qrSiB2vwcJ+4UM60=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.3.34/go.mod h1:Etz2dj6UHYuw+Xw830KfzCfWGMzqvUTCjUj5b76GVDc=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1 h1:VaRN3TlFdd6KxX1x3ILT5ynH6HvKgqdiXoTxAF4HQcQ=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1/go.mod h1:FbtygfRFze9usAadmnGJNc8KsP346kEe+y2/oyhGAGc=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0 h1:TToQNkvGguu209puTojY/ozlqy2d/SFNcoLIqTFi42g=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0/go.mod h1:0jp+ltwkf+SwG2fm/PKo8t4y8pJSgOCO4D8Lz3k0aHQ=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.27/go.mod h1:EOwBD4J4S5qYszS5/3DpkejfuK+Z5/1uzICfPaZLtqw=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2 h1:s7NA1SOw8q/5c0wr8477yOPp0z+uBaXBnLE0XYb0POA=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2/go.mod h1:fnjjWyAW/Pj5HYOxl9LJqWtEwS7W2qgcRLWP+uWbss0=
-github.com/aws/aws-sdk-go-v2/service/sso v1.12.10/go.mod h1:ouy2P4z6sJN70fR3ka3wD3Ro3KezSxU6eKGQI2+2fjI=
-github.com/aws/aws-sdk-go-v2/service/sso v1.24.2 h1:bSYXVyUzoTHoKalBmwaZxs97HU9DWWI3ehHSAMa7xOk=
-github.com/aws/aws-sdk-go-v2/service/sso v1.24.2/go.mod h1:skMqY7JElusiOUjMJMOv1jJsP7YUg7DrhgqZZWuzu1U=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.10/go.mod h1:AFvkxc8xfBe8XA+5St5XIHHrQQtkxqrRincx4hmMHOk=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2 h1:AhmO1fHINP9vFYUE0LHzCWg/LfUWUF+zFPEcY9QXb7o=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2/go.mod h1:o8aQygT2+MVP0NaV6kbdE1YnnIM8RRVQzoeUH45GOdI=
-github.com/aws/aws-sdk-go-v2/service/sts v1.19.0/go.mod h1:BgQOMsg8av8jset59jelyPW7NoZcZXLVpDsXunGDrk8=
-github.com/aws/aws-sdk-go-v2/service/sts v1.32.2 h1:CiS7i0+FUe+/YY1GvIBLLrR/XNGZ4CtM1Ll0XavNuVo=
-github.com/aws/aws-sdk-go-v2/service/sts v1.32.2/go.mod h1:HtaiBI8CjYoNVde8arShXb94UbQQi9L4EMr6D+xGBwo=
 github.com/aws/aws-xray-sdk-go v1.8.4 h1:5D631fWhs5hdBFW/8ALjWam+alm4tW42UGAuMJ1WAUI=
 github.com/aws/aws-xray-sdk-go v1.8.4/go.mod h1:mbN1uxWCue9WjS2Oj2FWg7TGIsLikxMOscD0qtEjFFY=
-github.com/aws/smithy-go v1.13.5/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
-github.com/aws/smithy-go v1.22.0 h1:uunKnWlcoL3zO7q+gG2Pk53joueEOsnNB28QdMsmiMM=
-github.com/aws/smithy-go v1.22.0/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -55,8 +15,19 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/elastic/elastic-transport-go/v8 v8.6.0 h1:Y2S/FBjx1LlCv5m6pWAF2kDJAHoSjSRSJCApolgfthA=
+github.com/elastic/elastic-transport-go/v8 v8.6.0/go.mod h1:YLHer5cj0csTzNFXoNQ8qhtGY1GTvSqPnKWKaqQE3Hk=
+github.com/elastic/go-elasticsearch/v8 v8.17.0 h1:e9cWksE/Fr7urDRmGPGp47Nsp4/mvNOrU8As1l2HQQ0=
+github.com/elastic/go-elasticsearch/v8 v8.17.0/go.mod h1:lGMlgKIbYoRvay3xWBeKahAiJOgmFDsjZC39nmO3H64=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
 github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
 github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
@@ -71,9 +42,8 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 h1:+9834+KizmvFV7pXQGSXQTsaWhq2GjuNUt0aUU0YBYw=
@@ -86,69 +56,39 @@ github.com/klauspost/compress v1.17.2 h1:RlWWUY/Dr4fL8qk9YG7DTZ7PDgME2V4csBXA8L/
 github.com/klauspost/compress v1.17.2/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
 github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
-github.com/opensearch-project/opensearch-go v1.1.0 h1:eG5sh3843bbU1itPRjA9QXbxcg8LaZ+DjEzQH9aLN3M=
-github.com/opensearch-project/opensearch-go v1.1.0/go.mod h1:+6/XHCuTH+fwsMJikZEWsucZ4eZMma3zNSeLrTtVGbo=
-github.com/opensearch-project/opensearch-go/v2 v2.3.0 h1:nQIEMr+A92CkhHrZgUhcfsrZjibvB3APXf2a1VwCmMQ=
-github.com/opensearch-project/opensearch-go/v2 v2.3.0/go.mod h1:8LDr9FCgUTVoT+5ESjc2+iaZuldqE+23Iq0r1XeNue8=
+github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
+github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
+github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
+github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
+github.com/onsi/gomega v1.18.1/go.mod h1:0q+aL8jAiMXy9hbwj2mr5GziHiwhAIQpFmmtT5hitRs=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.50.0 h1:H7fweIlBm0rXLs2q0XbalvJ6r0CUPFWK3/bB4N13e9M=
 github.com/valyala/fasthttp v1.50.0/go.mod h1:k2zXd82h/7UZc3VOdJ2WaUqt1uZ/XpXAfE9i+HBC3lA=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+go.opentelemetry.io/otel v1.28.0 h1:/SqNcYk+idO0CxKEUOtKQClMK/MimZihKYMruSMViUo=
+go.opentelemetry.io/otel v1.28.0/go.mod h1:q68ijF8Fc8CnMHKyzqL6akLO46ePnjkgfIMIjUIX9z4=
+go.opentelemetry.io/otel/metric v1.28.0 h1:f0HGvSl1KRAU1DLgLGFjrwVyismPlnuU6JD6bOeuA5Q=
+go.opentelemetry.io/otel/metric v1.28.0/go.mod h1:Fb1eVBFZmLVTMb6PPohq3TO9IIhUisDsbJoL/+uQW4s=
+go.opentelemetry.io/otel/sdk v1.21.0 h1:FTt8qirL1EysG6sTQRZ5TokkU8d0ugCj8htOgThZXQ8=
+go.opentelemetry.io/otel/sdk v1.21.0/go.mod h1:Nna6Yv7PWTdgJHVRD9hIYywQBRx7pbox6nwBnZIxl/E=
+go.opentelemetry.io/otel/trace v1.28.0 h1:GhQ9cUuQGmNDd5BTCP2dAvv75RdMxEfTmYejp+lkx9g=
+go.opentelemetry.io/otel/trace v1.28.0/go.mod h1:jPyXzNPg6da9+38HEwElrQiHlVMTnVfM3/yv2OlIHaI=
 golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
 golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20211216030914-fe4d6282115f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
 golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 h1:Jyp0Hsi0bmHXG6k9eATXoYtjd6e2UzZ1SCn/wIupY14=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17/go.mod h1:oQ5rr10WTTMvP4A36n8JpR1OrO1BEiV4f78CneXZxkA=
@@ -159,8 +99,10 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
 google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/serverless/apis/search/internal/handler/handler.go b/serverless/apis/search/internal/handler/handler.go
index 7f851fb..b41ab22 100644
--- a/serverless/apis/search/internal/handler/handler.go
+++ b/serverless/apis/search/internal/handler/handler.go
@@ -11,12 +11,12 @@ import (
 	"searchAPI/internal/utils"
 
 	"github.com/aws/aws-lambda-go/events"
+	"github.com/elastic/go-elasticsearch/v8"
 	"github.com/go-redis/redis/v8"
 	"github.com/google/uuid"
-	"github.com/opensearch-project/opensearch-go"
 )
 
-func HandleRequest(ctx context.Context, request events.APIGatewayProxyRequest, openSearchClient *opensearch.Client, redisClient *redis.Client) (events.APIGatewayProxyResponse, error) {
+func HandleRequest(ctx context.Context, request events.APIGatewayProxyRequest, elasticClient *elasticsearch.Client, redisClient *redis.Client) (events.APIGatewayProxyResponse, error) {
 	// Check for X-User-Id in the request headers
 	userId := request.Headers["x-user-id"]
 	if userId == "" {
@@ -51,7 +51,7 @@ func HandleRequest(ctx context.Context, request events.APIGatewayProxyRequest, o
 	response := model.SearchResponse{
 		Status:  200,
 		Message: "Success",
-		Content: service.PerformSearch(ctx, openSearchClient, redisClient, searchParams),
+		Content: service.PerformSearch(ctx, elasticClient, redisClient, searchParams),
 	}
 
 	// Serialize response to JSON
diff --git a/serverless/apis/search/internal/service/search.go b/serverless/apis/search/internal/service/search.go
index 73e9108..7c899d8 100644
--- a/serverless/apis/search/internal/service/search.go
+++ b/serverless/apis/search/internal/service/search.go
@@ -1,6 +1,7 @@
 package service
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"log"
@@ -12,12 +13,11 @@ import (
 	"time"
 
 	"github.com/aws/aws-xray-sdk-go/xray"
+	"github.com/elastic/go-elasticsearch/v8"
 	"github.com/go-redis/redis/v8"
-	"github.com/opensearch-project/opensearch-go"
-	"github.com/opensearch-project/opensearch-go/opensearchapi"
 )
 
-func PerformSearch(ctx context.Context, openSearchClient *opensearch.Client, redisClient *redis.Client, params utils.SearchParams) model.Content {
+func PerformSearch(ctx context.Context, elasticClient *elasticsearch.Client, redisClient *redis.Client, params utils.SearchParams) model.Content {
 	var content model.Content
 	cacheKey := generateCacheKey(params)
 
@@ -35,7 +35,7 @@ func PerformSearch(ctx context.Context, openSearchClient *opensearch.Client, red
 	// If data is not found in cache, execute DB query
 	if content.ArticleInfos == nil {
 		xray.Capture(ctx, "DBQuery", func(ctx context.Context) error {
-			articleInfos, totalElements := queyOpenSearch(ctx, openSearchClient, params)
+			articleInfos, totalElements := queyElasticSearch(ctx, elasticClient, params)
 			content = model.Content{
 				ArticleInfos: articleInfos,
 				Pageable: model.Pageable{
@@ -92,8 +92,8 @@ func calculateCacheExpiration() time.Time {
 	return expirationTime
 }
 
-func queyOpenSearch(ctx context.Context, client *opensearch.Client, params utils.SearchParams) ([]model.ArticleInfo, int) {
-	indexName := os.Getenv("OPENSEARCH_INDEX_NAME")
+func queyElasticSearch(ctx context.Context, client *elasticsearch.Client, params utils.SearchParams) ([]model.ArticleInfo, int) {
+	indexName := os.Getenv("ELASTICSEARCH_INDEX_NAME")
 
 	searchBody := buildSearchQuery(params)
 
@@ -102,12 +102,13 @@ func queyOpenSearch(ctx context.Context, client *opensearch.Client, params utils
 		log.Fatal("error marshaling search body: %w", err)
 	}
 
-	req := opensearchapi.SearchRequest{
-		Index: []string{indexName},
-		Body:  strings.NewReader(string(body)),
-	}
-
-	res, err := req.Do(ctx, client)
+	// Perform the search request
+	res, err := client.Search(
+		client.Search.WithContext(ctx),
+		client.Search.WithIndex(indexName),
+		client.Search.WithBody(bytes.NewReader(body)),
+		client.Search.WithTrackTotalHits(true),
+	)
 	if err != nil {
 		log.Fatal("error performing search: %w", err)
 	}
diff --git a/serverless/apis/search/main.go b/serverless/apis/search/main.go
index 1620814..ca44e14 100644
--- a/serverless/apis/search/main.go
+++ b/serverless/apis/search/main.go
@@ -2,36 +2,42 @@ package main
 
 import (
 	"context"
+	"crypto/tls"
+	"fmt"
 	"log"
+	"net/http"
 	"os"
 	"searchAPI/internal/handler"
+	"strconv"
 
-	awsConfig "github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-xray-sdk-go/xray"
+	"github.com/elastic/go-elasticsearch/v8"
 
 	"github.com/aws/aws-lambda-go/events"
 	"github.com/aws/aws-lambda-go/lambda"
 	"github.com/go-redis/redis/v8"
-	"github.com/opensearch-project/opensearch-go"
-	"github.com/opensearch-project/opensearch-go/v2/signer/awsv2"
 )
 
-func getOpenSearchConfig() opensearch.Config {
-	endpointUrl := os.Getenv("OPENSEARCH_ENDPOINT")
+func getElasticsearchConfig() elasticsearch.Config {
+	host := os.Getenv("ELASTICSEARCH_HOST")
+	portStr := os.Getenv("ELASTICSEARCH_PORT")
+	username := os.Getenv("ELASTICSEARCH_USERNAME")
+	password := os.Getenv("ELASTICSEARCH_PASSWORD")
 
-	// load AWS config
-	cfg, err := awsConfig.LoadDefaultConfig(context.TODO(), awsConfig.WithRegion("ap-northeast-2"))
+	port, err := strconv.Atoi(portStr)
 	if err != nil {
-		log.Fatal("Failed to load AWS config: " + err.Error())
-	}
-	signer, err := awsv2.NewSignerWithService(cfg, "es")
-	if err != nil {
-		log.Fatal("Failed to create signer: " + err.Error())
+		log.Fatalf("Invalid port number: %s", err)
 	}
 
-	return opensearch.Config{
-		Addresses: []string{endpointUrl},
-		Signer:    signer,
+	return elasticsearch.Config{
+		Addresses: []string{fmt.Sprintf("https://%s:%d", host, port)},
+		Username:  username,
+		Password:  password,
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				InsecureSkipVerify: true,
+			},
+		},
 	}
 }
 
@@ -42,14 +48,14 @@ func getRedisConfig() *redis.Options {
 	}
 }
 
-var openSearchClient *opensearch.Client
+var elasticClient *elasticsearch.Client
 var redisClient *redis.Client
 
 func init() {
 	var err error
-	openSearchClient, err = opensearch.NewClient(getOpenSearchConfig())
+	elasticClient, err = elasticsearch.NewClient(getElasticsearchConfig())
 	if err != nil {
-		log.Fatal("Error creating the client: " + err.Error())
+		log.Fatal("Error creating Elasticsearch client: " + err.Error())
 	}
 	redisClient = redis.NewClient(getRedisConfig())
 	_, err = redisClient.Ping(context.Background()).Result()
@@ -63,6 +69,6 @@ func main() {
 		// Start the main segment
 		ctx, seg := xray.BeginSegment(context.Background(), "searchAPI")
 		defer seg.Close(nil) // Ensure the segment is closed after processing
-		return handler.HandleRequest(ctx, request, openSearchClient, redisClient)
+		return handler.HandleRequest(ctx, request, elasticClient, redisClient)
 	})
 }
diff --git a/serverless/crawler/config/config.go b/serverless/crawler/config/config.go
index 7c47aee..12da10f 100644
--- a/serverless/crawler/config/config.go
+++ b/serverless/crawler/config/config.go
@@ -1,20 +1,21 @@
 package config
 
 import (
-	"context"
+	"crypto/tls"
+	"fmt"
 	"log"
+	"net/http"
 	"os"
+	"strconv"
 	"sync"
 
-	awsConfig "github.com/aws/aws-sdk-go-v2/config"
-	"github.com/opensearch-project/opensearch-go/v2"
-	"github.com/opensearch-project/opensearch-go/v2/signer/awsv2"
+	"github.com/elastic/go-elasticsearch/v8"
 )
 
 type Config struct {
 	CrawlerConfigFilePath string
 	IndexName             string
-	OpenSearchConfig      opensearch.Config
+	ElasticSearchConfig   elasticsearch.Config
 	S3BucketName          string
 	KMSKeyARN             string
 	TextHandlerLambdaName string
@@ -30,7 +31,7 @@ func GetConfigSingletonInstance() *Config {
 		instance = &Config{
 			CrawlerConfigFilePath: os.Getenv("CRAWLER_CONFIG_FILE_PATH"),
 			IndexName:             os.Getenv("INDEX_NAME"),
-			OpenSearchConfig:      getOpenSearchConfig(os.Getenv("OPENSEARCH_ENDPOINT")),
+			ElasticSearchConfig:   getElasticsearchConfig(),
 			S3BucketName:          os.Getenv("S3_BUCKET_NAME"),
 			KMSKeyARN:             os.Getenv("KMS_KEY_ARN"),
 			TextHandlerLambdaName: os.Getenv("TEXT_HANDLER_LAMBDA_NAME"),
@@ -39,21 +40,25 @@ func GetConfigSingletonInstance() *Config {
 	return instance
 }
 
-func getOpenSearchConfig(endpointUrl string) opensearch.Config {
-	// AWS 설정 로드
-	cfg, err := awsConfig.LoadDefaultConfig(context.TODO(), awsConfig.WithRegion("ap-northeast-2"))
-	if err != nil {
-		log.Fatal("Failed to load AWS config: " + err.Error())
-	}
+func getElasticsearchConfig() elasticsearch.Config {
+	host := os.Getenv("ELASTICSEARCH_HOST")
+	portStr := os.Getenv("ELASTICSEARCH_PORT")
+	username := os.Getenv("ELASTICSEARCH_USERNAME")
+	password := os.Getenv("ELASTICSEARCH_PASSWORD")
 
-	// AWS 서명자 생성
-	signer, err := awsv2.NewSignerWithService(cfg, "es")
+	port, err := strconv.Atoi(portStr)
 	if err != nil {
-		log.Fatal("Failed to create signer: " + err.Error())
+		log.Fatalf("Invalid port number: %s", err)
 	}
 
-	return opensearch.Config{
-		Addresses: []string{endpointUrl},
-		Signer:    signer,
+	return elasticsearch.Config{
+		Addresses: []string{fmt.Sprintf("https://%s:%d", host, port)},
+		Username:  username,
+		Password:  password,
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				InsecureSkipVerify: true,
+			},
+		},
 	}
 }
diff --git a/serverless/crawler/go.mod b/serverless/crawler/go.mod
index 3763d9e..8d1b46c 100644
--- a/serverless/crawler/go.mod
+++ b/serverless/crawler/go.mod
@@ -9,7 +9,8 @@ require (
 	github.com/aws/aws-sdk-go-v2/config v1.27.43
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.65.3
 	github.com/aws/aws-xray-sdk-go v1.8.4
-	github.com/opensearch-project/opensearch-go/v2 v2.3.0
+	github.com/elastic/go-elasticsearch v0.0.0
+	github.com/elastic/go-elasticsearch/v8 v8.17.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -30,15 +31,20 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.32.2 // indirect
 	github.com/aws/smithy-go v1.22.0 // indirect
+	github.com/elastic/elastic-transport-go/v8 v8.6.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.17.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/stretchr/testify v1.9.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.50.0 // indirect
+	go.opentelemetry.io/otel v1.28.0 // indirect
+	go.opentelemetry.io/otel/metric v1.28.0 // indirect
+	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	golang.org/x/net v0.23.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 // indirect
 	google.golang.org/grpc v1.59.0 // indirect
diff --git a/serverless/crawler/go.sum b/serverless/crawler/go.sum
index a6096e2..58b85d9 100644
--- a/serverless/crawler/go.sum
+++ b/serverless/crawler/go.sum
@@ -4,30 +4,22 @@ github.com/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sx
 github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/aws/aws-lambda-go v1.47.0 h1:0H8s0vumYx/YKs4sE7YM0ktwL2eWse+kfopsRI1sXVI=
 github.com/aws/aws-lambda-go v1.47.0/go.mod h1:dpMpZgvWx5vuQJfBt0zqBha60q7Dd7RfgJv23DymV8A=
-github.com/aws/aws-sdk-go v1.44.263/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/aws/aws-sdk-go v1.47.9 h1:rarTsos0mA16q+huicGx0e560aYRtOucV5z2Mw23JRY=
 github.com/aws/aws-sdk-go v1.47.9/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
-github.com/aws/aws-sdk-go-v2 v1.18.0/go.mod h1:uzbQtefpm44goOPmdKyAlXSNcwlRgF3ePWVW6EtJvvw=
 github.com/aws/aws-sdk-go-v2 v1.32.2 h1:AkNLZEyYMLnx/Q/mSKkcMqwNFXMAvFto9bNsHqcTduI=
 github.com/aws/aws-sdk-go-v2 v1.32.2/go.mod h1:2SK5n0a2karNTv5tbP1SjsX0uhttou00v/HpXKM1ZUo=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.6 h1:pT3hpW0cOHRJx8Y0DfJUEQuqPild8jRGmSFmBgvydr0=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.6/go.mod h1:j/I2++U0xX+cr44QjHay4Cvxj6FUbnxrgmqN3H1jTZA=
-github.com/aws/aws-sdk-go-v2/config v1.18.25/go.mod h1:dZnYpD5wTW/dQF0rRNLVypB396zWCcPiBIvdvSWHEg4=
 github.com/aws/aws-sdk-go-v2/config v1.27.43 h1:p33fDDihFC390dhhuv8nOmX419wjOSDQRb+USt20RrU=
 github.com/aws/aws-sdk-go-v2/config v1.27.43/go.mod h1:pYhbtvg1siOOg8h5an77rXle9tVG8T+BWLWAo7cOukc=
-github.com/aws/aws-sdk-go-v2/credentials v1.13.24/go.mod h1:jYPYi99wUOPIFi0rhiOvXeSEReVOzBqFNOX5bXYoG2o=
 github.com/aws/aws-sdk-go-v2/credentials v1.17.41 h1:7gXo+Axmp+R4Z+AK8YFQO0ZV3L0gizGINCOWxSLY9W8=
 github.com/aws/aws-sdk-go-v2/credentials v1.17.41/go.mod h1:u4Eb8d3394YLubphT4jLEwN1rLNq2wFOlT6OuxFwPzU=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.3/go.mod h1:4Q0UFP0YJf0NrsEuEYHpM9fTSEVnD16Z3uyEF7J9JGM=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.17 h1:TMH3f/SCAWdNtXXVPPu5D6wrr4G5hI1rAxbcocKfC7Q=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.17/go.mod h1:1ZRXLdTpzdJb9fwTMXiLipENRxkGMTn1sfKexGllQCw=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.33/go.mod h1:7i0PF1ME/2eUPFcjkVIwq+DOygHEoK92t5cDqNgYbIw=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21 h1:UAsR3xA31QGf79WzpG/ixT9FZvQlh5HY1NRqSHBNOCk=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.21/go.mod h1:JNr43NFf5L9YaG3eKTm7HQzls9J+A9YYcGI5Quh1r2Y=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.27/go.mod h1:UrHnn3QV/d0pBZ6QBAEQcqFLf8FAzLmoUfPVIueOvoM=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21 h1:6jZVETqmYCadGFvrYEQfC5fAQmlo80CeL5psbno6r0s=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.21/go.mod h1:1SR0GbLlnN3QUmYaflZNiH1ql+1qrSiB2vwcJ+4UM60=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.3.34/go.mod h1:Etz2dj6UHYuw+Xw830KfzCfWGMzqvUTCjUj5b76GVDc=
 github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1 h1:VaRN3TlFdd6KxX1x3ILT5ynH6HvKgqdiXoTxAF4HQcQ=
 github.com/aws/aws-sdk-go-v2/internal/ini v1.8.1/go.mod h1:FbtygfRFze9usAadmnGJNc8KsP346kEe+y2/oyhGAGc=
 github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.21 h1:7edmS3VOBDhK00b/MwGtGglCm7hhwNYnjJs/PgFdMQE=
@@ -36,37 +28,42 @@ github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0 h1:TToQNkv
 github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.12.0/go.mod h1:0jp+ltwkf+SwG2fm/PKo8t4y8pJSgOCO4D8Lz3k0aHQ=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.4.2 h1:4FMHqLfk0efmTqhXVRL5xYRqlEBNBiRI7N6w4jsEdd4=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.4.2/go.mod h1:LWoqeWlK9OZeJxsROW2RqrSPvQHKTpp69r/iDjwsSaw=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.27/go.mod h1:EOwBD4J4S5qYszS5/3DpkejfuK+Z5/1uzICfPaZLtqw=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2 h1:s7NA1SOw8q/5c0wr8477yOPp0z+uBaXBnLE0XYb0POA=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.2/go.mod h1:fnjjWyAW/Pj5HYOxl9LJqWtEwS7W2qgcRLWP+uWbss0=
 github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.18.2 h1:t7iUP9+4wdc5lt3E41huP+GvQZJD38WLsgVp4iOtAjg=
 github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.18.2/go.mod h1:/niFCtmuQNxqx9v8WAPq5qh7EH25U4BF6tjoyq9bObM=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.65.3 h1:xxHGZ+wUgZNACQmxtdvP5tgzfsxGS3vPpTP5Hy3iToE=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.65.3/go.mod h1:cB6oAuus7YXRZhWCc1wIwPywwZ1XwweNp2TVAEGYeB8=
-github.com/aws/aws-sdk-go-v2/service/sso v1.12.10/go.mod h1:ouy2P4z6sJN70fR3ka3wD3Ro3KezSxU6eKGQI2+2fjI=
 github.com/aws/aws-sdk-go-v2/service/sso v1.24.2 h1:bSYXVyUzoTHoKalBmwaZxs97HU9DWWI3ehHSAMa7xOk=
 github.com/aws/aws-sdk-go-v2/service/sso v1.24.2/go.mod h1:skMqY7JElusiOUjMJMOv1jJsP7YUg7DrhgqZZWuzu1U=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.10/go.mod h1:AFvkxc8xfBe8XA+5St5XIHHrQQtkxqrRincx4hmMHOk=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2 h1:AhmO1fHINP9vFYUE0LHzCWg/LfUWUF+zFPEcY9QXb7o=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.2/go.mod h1:o8aQygT2+MVP0NaV6kbdE1YnnIM8RRVQzoeUH45GOdI=
-github.com/aws/aws-sdk-go-v2/service/sts v1.19.0/go.mod h1:BgQOMsg8av8jset59jelyPW7NoZcZXLVpDsXunGDrk8=
 github.com/aws/aws-sdk-go-v2/service/sts v1.32.2 h1:CiS7i0+FUe+/YY1GvIBLLrR/XNGZ4CtM1Ll0XavNuVo=
 github.com/aws/aws-sdk-go-v2/service/sts v1.32.2/go.mod h1:HtaiBI8CjYoNVde8arShXb94UbQQi9L4EMr6D+xGBwo=
 github.com/aws/aws-xray-sdk-go v1.8.4 h1:5D631fWhs5hdBFW/8ALjWam+alm4tW42UGAuMJ1WAUI=
 github.com/aws/aws-xray-sdk-go v1.8.4/go.mod h1:mbN1uxWCue9WjS2Oj2FWg7TGIsLikxMOscD0qtEjFFY=
-github.com/aws/smithy-go v1.13.5/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
 github.com/aws/smithy-go v1.22.0 h1:uunKnWlcoL3zO7q+gG2Pk53joueEOsnNB28QdMsmiMM=
 github.com/aws/smithy-go v1.22.0/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/elastic/elastic-transport-go/v8 v8.6.0 h1:Y2S/FBjx1LlCv5m6pWAF2kDJAHoSjSRSJCApolgfthA=
+github.com/elastic/elastic-transport-go/v8 v8.6.0/go.mod h1:YLHer5cj0csTzNFXoNQ8qhtGY1GTvSqPnKWKaqQE3Hk=
+github.com/elastic/go-elasticsearch v0.0.0 h1:Pd5fqOuBxKxv83b0+xOAJDAkziWYwFinWnBO0y+TZaA=
+github.com/elastic/go-elasticsearch v0.0.0/go.mod h1:TkBSJBuTyFdBnrNqoPc54FN0vKf5c04IdM4zuStJ7xg=
+github.com/elastic/go-elasticsearch/v8 v8.17.0 h1:e9cWksE/Fr7urDRmGPGp47Nsp4/mvNOrU8As1l2HQQ0=
+github.com/elastic/go-elasticsearch/v8 v8.17.0/go.mod h1:lGMlgKIbYoRvay3xWBeKahAiJOgmFDsjZC39nmO3H64=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/grpc-ecosystem/go-grpc-middleware v1.3.0 h1:+9834+KizmvFV7pXQGSXQTsaWhq2GjuNUt0aUU0YBYw=
 github.com/grpc-ecosystem/go-grpc-middleware v1.3.0/go.mod h1:z0ButlSOZa5vEBq9m2m2hlwIgKw+rp3sdCBRoJY+30Y=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
@@ -75,61 +72,31 @@ github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGw
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/klauspost/compress v1.17.2 h1:RlWWUY/Dr4fL8qk9YG7DTZ7PDgME2V4csBXA8L/ixi4=
 github.com/klauspost/compress v1.17.2/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
-github.com/opensearch-project/opensearch-go/v2 v2.3.0 h1:nQIEMr+A92CkhHrZgUhcfsrZjibvB3APXf2a1VwCmMQ=
-github.com/opensearch-project/opensearch-go/v2 v2.3.0/go.mod h1:8LDr9FCgUTVoT+5ESjc2+iaZuldqE+23Iq0r1XeNue8=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.50.0 h1:H7fweIlBm0rXLs2q0XbalvJ6r0CUPFWK3/bB4N13e9M=
 github.com/valyala/fasthttp v1.50.0/go.mod h1:k2zXd82h/7UZc3VOdJ2WaUqt1uZ/XpXAfE9i+HBC3lA=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+go.opentelemetry.io/otel v1.28.0 h1:/SqNcYk+idO0CxKEUOtKQClMK/MimZihKYMruSMViUo=
+go.opentelemetry.io/otel v1.28.0/go.mod h1:q68ijF8Fc8CnMHKyzqL6akLO46ePnjkgfIMIjUIX9z4=
+go.opentelemetry.io/otel/metric v1.28.0 h1:f0HGvSl1KRAU1DLgLGFjrwVyismPlnuU6JD6bOeuA5Q=
+go.opentelemetry.io/otel/metric v1.28.0/go.mod h1:Fb1eVBFZmLVTMb6PPohq3TO9IIhUisDsbJoL/+uQW4s=
+go.opentelemetry.io/otel/sdk v1.21.0 h1:FTt8qirL1EysG6sTQRZ5TokkU8d0ugCj8htOgThZXQ8=
+go.opentelemetry.io/otel/sdk v1.21.0/go.mod h1:Nna6Yv7PWTdgJHVRD9hIYywQBRx7pbox6nwBnZIxl/E=
+go.opentelemetry.io/otel/trace v1.28.0 h1:GhQ9cUuQGmNDd5BTCP2dAvv75RdMxEfTmYejp+lkx9g=
+go.opentelemetry.io/otel/trace v1.28.0/go.mod h1:jPyXzNPg6da9+38HEwElrQiHlVMTnVfM3/yv2OlIHaI=
 golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
 golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.1.0/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17 h1:Jyp0Hsi0bmHXG6k9eATXoYtjd6e2UzZ1SCn/wIupY14=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17/go.mod h1:oQ5rr10WTTMvP4A36n8JpR1OrO1BEiV4f78CneXZxkA=
@@ -144,6 +111,5 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/serverless/crawler/internal/crawler/crawler.go b/serverless/crawler/internal/crawler/crawler.go
index 4fe79a3..5f83cd8 100644
--- a/serverless/crawler/internal/crawler/crawler.go
+++ b/serverless/crawler/internal/crawler/crawler.go
@@ -12,11 +12,11 @@ import (
 	utils "crawler/internal/utils"
 
 	"github.com/aws/aws-xray-sdk-go/xray"
-	"github.com/opensearch-project/opensearch-go/v2"
+	"github.com/elastic/go-elasticsearch/v8"
 )
 
 // Run the crawler
-func (c *Crawler) Run(ctx context.Context, client *opensearch.Client) {
+func (c *Crawler) Run(ctx context.Context, client *elasticsearch.Client) {
 	ctx, segCrawler := xray.BeginSubsegment(ctx, "Run")
 	defer segCrawler.Close(nil)
 	segCrawler.AddMetadata("Company", c.Company)
diff --git a/serverless/crawler/internal/db/opensearch.go b/serverless/crawler/internal/db/elasticsearch.go
similarity index 86%
rename from serverless/crawler/internal/db/opensearch.go
rename to serverless/crawler/internal/db/elasticsearch.go
index 0d4aa4e..f920597 100644
--- a/serverless/crawler/internal/db/opensearch.go
+++ b/serverless/crawler/internal/db/elasticsearch.go
@@ -14,8 +14,8 @@ import (
 	utils "crawler/internal/utils"
 
 	"github.com/aws/aws-xray-sdk-go/xray"
-	"github.com/opensearch-project/opensearch-go/v2"
-	"github.com/opensearch-project/opensearch-go/v2/opensearchapi"
+	"github.com/elastic/go-elasticsearch/esapi"
+	"github.com/elastic/go-elasticsearch/v8"
 )
 
 type postData struct {
@@ -28,7 +28,7 @@ type postData struct {
 	CreatedAt      string   `json:"created_at"`
 }
 
-func InsertDB(client *opensearch.Client, ctx context.Context, companyName string, posts *[]types.Post, textInfos *[]types.TextAnalysisResult, lastIdxToUpdate int) uint32 {
+func InsertDB(client *elasticsearch.Client, ctx context.Context, companyName string, posts *[]types.Post, textInfos *[]types.TextAnalysisResult, lastIdxToUpdate int) uint32 {
 	config := config.GetConfigSingletonInstance()
 
 	// prepare bulk insert request
@@ -67,9 +67,9 @@ func appendToBulkRequestBody(buf *bytes.Buffer, data postData, config *config.Co
 	buf.Write(dataJSON)
 }
 
-func executeBulkInsert(client *opensearch.Client, bulkBody *bytes.Buffer, ctx context.Context) uint32 {
+func executeBulkInsert(client *elasticsearch.Client, bulkBody *bytes.Buffer, ctx context.Context) uint32 {
 	logger := utils.GetLoggerSingletonInstance()
-	req := opensearchapi.BulkRequest{
+	req := esapi.BulkRequest{
 		Body: bytes.NewReader(bulkBody.Bytes()),
 	}
 
@@ -83,7 +83,7 @@ func executeBulkInsert(client *opensearch.Client, bulkBody *bytes.Buffer, ctx co
 	return countSuccessfulInserts(res)
 }
 
-func countSuccessfulInserts(res *opensearchapi.Response) uint32 {
+func countSuccessfulInserts(res *esapi.Response) uint32 {
 	logger := utils.GetLoggerSingletonInstance()
 
 	// parse response
diff --git a/serverless/crawler/main.go b/serverless/crawler/main.go
index 31bd4dd..35dcc6c 100644
--- a/serverless/crawler/main.go
+++ b/serverless/crawler/main.go
@@ -10,20 +10,20 @@ import (
 
 	"github.com/aws/aws-lambda-go/lambda"
 	"github.com/aws/aws-xray-sdk-go/xray"
-	"github.com/opensearch-project/opensearch-go/v2"
+	"github.com/elastic/go-elasticsearch/v8"
 )
 
 var (
 	cfg    *config.Config
-	client *opensearch.Client
+	client *elasticsearch.Client
 )
 
 func init() {
 	cfg = config.GetConfigSingletonInstance()
 	var err error
-	client, err = opensearch.NewClient(cfg.OpenSearchConfig)
+	client, err = elasticsearch.NewClient(cfg.ElasticSearchConfig)
 	if err != nil {
-		log.Fatal("Error creating the client: " + err.Error())
+		log.Fatal("Error creating Elasticsearch client: " + err.Error())
 	}
 }
 


Test patch: