Lesson3_using_elasticsearch_rest_api.md

Lesson 3 - Using ElasticSearch REST API

1. ElasticSearch healthcheck

DevTools:

GET /

Python example

2. List all elasticsearch indices

DevTools:

GET /_cat/indices?v

Python example

3. Insert simple document

DevTools:

POST my-index-000001/_doc
{
    "@timestamp": "2022-11-03T08:14:14.485760",
    "level": "Information",
    "message": "Hello, World from REST API via python!",
    "fields": {
      "Platform": "Talentech",
      "Solution": "Workshop",
      "AppName": "Lesson2",
      "EnvironmentName": "Local"
    }
}

Python example

4 Query documents

Search for all documents that contain python keyword

DevTools:

GET /my-index-000001/_search?q=python

Search for first two documents that contain field AppName: Lesson2 and show particular values

DevTools:

POST /my-index-000001/_search
{
    "query": {
        "match" : {
            "fields.AppName" : "Lesson2"
        }
    },
    "size": 2,
    "from": 0,
    "_source": [ "message", "fields.Platform", "fields.Solution" ],
    "highlight": {
        "fields" : {
            "fields.AppName" : {}
        }
    }
}

You can access _id value that identifies given document and use it to delete some documents:

5 Delete document

DevTools:

DELETE /my-index-000001/_doc/<_id>

Reference: ElasticSearch API