Advanced Elasticsearch 7.0

Basic CRUD APIs

Some of the basic APIs for working with indices are as follows:

• Index creation: The name of the index must follow these requirements:

• • Lowercase only
  • Cannot include \, /, *, ?, ", <, >, |, spaces, commas, or #
  • The colon (:) character can't be used
  • Cannot start with -, _, or +
  • Cannot be . or ..
  • The maximum bytes for the index name is 255

Let's practice index creation by using a PUT request with a valid index name and then use an invalid index name in the Postman app. For example, the valid index name we will use is cf_etf. The request URL is http://localhost:9200/cf_etf. The successful response to the valid case is 200 OK, as shown in the following screenshot:

The invalid index name that we will use for the illustration ...