How to Management Elasticsearch Index data

I am using Elasticsearch to search for products.

Perform full indexing of product information on a daily basis.

I am deleting and recreating the index for clean indexing, but I am not sure how to handle product search at that time.

How about the standard way of handling queries at the time of clean full indexing?

During clean full indexing, I thought about processing it logically through a status check after creating a completely new index, but I wonder if there is a better way.

The correct way of doing it is by using an alias. You have the current product index, let's call it products-1 and it is aliased with the name products. All your search queries go through the alias name and not through the index name.

When you need to reindex your products, you do so but in a new index called products-2 and when you're done indexing and tested that everything went fine, you just switch the alias using the following command and your search queries will be carried out uninterrupted:

POST _aliases
{
  "actions": [
    {
      "remove": {
        "index": "products-1",
        "alias": "products"
      }
    },
    {
      "add": {
        "index": "products-2",
        "alias": "products"
      }
    }
  ]
}

You can then go ahead and delete the index or if you're confident you can do it in a single step like this:

POST _aliases
{
  "actions": [
    {
      "remove_index": {
        "index": "products-1"
      }
    },
    {
      "add": {
        "index": "products-2",
        "alias": "products"
      }
    }
  ]
}