Elasticsearch auto generated timestamps

ElastisearchIngestExample.md

PUT _ingest/pipeline/timestamp

{
    "description": "Adds a timestamp field at the current time",
    "processors": [
        {
            "set": {
                "field": "@timestamp",
                "value": "{{_ingest.timestamp}}",
                "override": false
            }
        }
    ]
}

POST/PUT /?pipeline=timestamp

{
  "<FIELD>": "<VALUE>"
}